bool ImGui_ImplSdl_CreateDeviceObjects()
{
// Backup GL state
GLint last_texture, last_array_buffer;
glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture);
glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &last_array_buffer);
const GLchar *vertex_shader =
"uniform mat4 ProjMtx;\n"
"attribute vec2 Position;\n"
"attribute vec2 UV;\n"
"attribute vec4 Color;\n"
"varying vec2 Frag_UV;\n"
"varying vec4 Frag_Color;\n"
"void main()\n"
"{\n"
" Frag_UV = UV;\n"
" Frag_Color = Color;\n"
" gl_Position = ProjMtx * vec4(Position.xy,0,1);\n"
"}\n";
const GLchar* fragment_shader =
// WebGL requires precision specifiers but OpenGL 2.1 disallows
// them, so I define the shader without it and then add it here.
"precision mediump float;\n"
"uniform sampler2D Texture;\n"
"varying vec2 Frag_UV;\n"
"varying vec4 Frag_Color;\n"
"void main()\n"
"{\n"
" gl_FragColor = Frag_Color * texture2D(Texture, Frag_UV);\n"
"}\n";
g_ShaderHandle = glCreateProgram();
g_VertHandle = glCreateShader(GL_VERTEX_SHADER);
g_FragHandle = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(g_VertHandle, 1, &vertex_shader, 0);
glShaderSource(g_FragHandle, 1, &fragment_shader, 0);
glCompileShader(g_VertHandle);
glCompileShader(g_FragHandle);
glAttachShader(g_ShaderHandle, g_VertHandle);
glAttachShader(g_ShaderHandle, g_FragHandle);
glLinkProgram(g_ShaderHandle);
g_AttribLocationTex = glGetUniformLocation(g_ShaderHandle, "Texture");
g_AttribLocationProjMtx = glGetUniformLocation(g_ShaderHandle, "ProjMtx");
g_AttribLocationPosition = glGetAttribLocation(g_ShaderHandle, "Position");
g_AttribLocationUV = glGetAttribLocation(g_ShaderHandle, "UV");
g_AttribLocationColor = glGetAttribLocation(g_ShaderHandle, "Color");
glGenBuffers(1, &g_VboHandle);
glGenBuffers(1, &g_ElementsHandle);
ImGuiIO& io = ImGui::GetIO();
// Build texture
unsigned char* pixels;
int width, height;
io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height); // Load as RGBA 32-bits for OpenGL3 demo because it is more likely to be compatible with user's existing shader.
// Create OpenGL texture
glGenTextures(1, &g_FontTexture);
glBindTexture(GL_TEXTURE_2D, g_FontTexture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
// Store our identifier
io.Fonts->TexID = (void *)(intptr_t)g_FontTexture;
// Cleanup (don't clear the input data if you want to append new fonts later)
io.Fonts->ClearInputData();
io.Fonts->ClearTexData();
// Restore modified GL state
glBindTexture(GL_TEXTURE_2D, last_texture);
glBindBuffer(GL_ARRAY_BUFFER, last_array_buffer);
return true;
}
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// HW3a::initShader1:
//
// Initialize vertex and fragment shaders for texture mapping.
//
void
HW3a::initShader1()
{
// compile vertex shader
if(!m_program[0].addShaderFromSourceFile(QGLShader::Vertex, ":/vshader3a1.glsl")) {
QMessageBox::critical(0, "Error", "Vertex shader error", QMessageBox::Ok);
QApplication::quit();
}
// compile fragment shader
if(!m_program[0].addShaderFromSourceFile(QGLShader::Fragment, ":/fshader3a1.glsl")) {
QMessageBox::critical(0, "Error", "Fragment shader error",QMessageBox::Ok);
QApplication::quit();
}
// bind the attribute variable in the glsl program with a generic vertex attribute index;
// values provided via ATTRIB_VERTEX will modify the value of "a_position")
glBindAttribLocation(m_program[0].programId(), ATTRIB_VERTEX, "a_Position");
// bind the attribute variable in the glsl program with a generic vertex attribute index;
// values provided via ATTRIB_TEXTURE_POSITION will modify the value of "a_TexCoord")
glBindAttribLocation(m_program[0].programId(), ATTRIB_TEXTURE_POSITION, "a_TexCoord");
// link shader pipeline; attribute bindings go into effect at this point
if(!m_program[0].link()) {
QMessageBox::critical(0, "Error", "Could not link shader", QMessageBox::Ok);
QApplication::quit();
}
// get storage location of u_ModelMatrix in vertex shader
m_uniform[0][MV] = glGetUniformLocation(m_program[0].programId(), "u_ModelMatrix");
if((int) m_uniform[0][MV] < 0) {
qDebug() << "Failed to get the storage location of u_ModelMatrix";
exit(-1);
}
// get storage location of u_Theta in vertex shader
m_uniform[0][THETA] = glGetUniformLocation(m_program[0].programId(), "u_Theta");
if((int) m_uniform[0][THETA] < 0) {
qDebug() << "Failed to get the storage location of u_Theta";
exit(-1);
}
// get storage location of u_Twist in vertex shader
m_uniform[0][TWIST] = glGetUniformLocation(m_program[0].programId(), "u_Twist");
if((int) m_uniform[0][TWIST] < 0) {
qDebug() << "Failed to get the storage location of u_Twist";
exit(-1);
}
// get storage location of u_Sampler in fragment shader
m_uniform[0][SAMPLER] = glGetUniformLocation(m_program[0].programId(), "u_Sampler");
if((int) m_uniform[0][SAMPLER] < 0) {
qDebug() << "Failed to get the storage location of u_Sampler";
exit(-1);
}
// bind the glsl program
glUseProgram(m_program[0].programId());
// init model matrix; pass it to vertex shader along with theta and twist flag
m_ModelMatrix.setToIdentity();
glUniformMatrix4fv(m_uniform[0][MV], 1, GL_FALSE, m_ModelMatrix.constData());
glUniform1f(m_uniform[0][THETA], m_theta);
glUniform1i(m_uniform[0][TWIST], m_twist);
glUniform1i(m_uniform[0][SAMPLER], 0);
}
void Object3D::setShaderProgram(const char *vertexShader, const char *fragmentShader){
GLuint vsSource, fsSource;
vsSource = glCreateShader(GL_VERTEX_SHADER);
fsSource = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(fsSource, 1, &fragmentShader, 0);
glShaderSource(vsSource, 1, &vertexShader, 0);
glCompileShader(vsSource);
glCompileShader(fsSource);
GLint success = 0;
glGetShaderiv(fsSource, GL_COMPILE_STATUS, &success);
if (!success){
GLint maxLength = 0;
glGetShaderiv(fsSource, GL_INFO_LOG_LENGTH, &maxLength);
std::vector<GLchar> infolog(maxLength);
glGetShaderInfoLog(fsSource, maxLength, &maxLength, &infolog[0]);
std::cout << infolog.data() << std::endl;
return;
}
success = 0;
glGetShaderiv(vsSource, GL_COMPILE_STATUS, &success);
if (!success){
GLint maxLength = 0;
glGetShaderiv(vsSource, GL_INFO_LOG_LENGTH, &maxLength);
std::vector<GLchar> infolog(maxLength);
glGetShaderInfoLog(vsSource, maxLength, &maxLength, &infolog[0]);
std::cout << infolog.data() << std::endl;
return;
}
shaderProgram = glCreateProgram();
glAttachShader(shaderProgram, vsSource);
glAttachShader(shaderProgram, fsSource);
glLinkProgram(shaderProgram);
glGetProgramiv(shaderProgram, GL_LINK_STATUS, &success);
if (success == GL_FALSE){
GLint maxLength = 0;
glGetProgramiv(shaderProgram, GL_INFO_LOG_LENGTH, &maxLength);
std::vector<GLchar> infolog(maxLength);
glGetProgramInfoLog(shaderProgram, maxLength, &maxLength, &infolog[0]);
std::cout << infolog.data() << std::endl;
return;
}
glDetachShader(shaderProgram, vsSource);
glDetachShader(shaderProgram, fsSource);
attributeUV = glGetAttribLocation(shaderProgram, "vertexUV");
attributeTex = glGetUniformLocation(shaderProgram, "textureSampler");
hasShaderProgram = true;
if (attributeUV == -1){
std::cout << "UV not bound. " << std::endl;
hasShaderProgram = false;
}
if (attributeTex == -1){
std::cout << "Texture not bound. " << std::endl;
hasShaderProgram = false;
}
}
int main () {
/*--------------------------------START OPENGL---------------------------*/
assert (restart_gl_log ());
// start GL context and O/S window using the GLFW helper library
assert (start_gl ());
glEnable (GL_DEPTH_TEST); // enable depth-testing
// depth-testing interprets a smaller value as "closer"
glDepthFunc (GL_LESS);
glEnable (GL_CULL_FACE); // cull face
glCullFace (GL_BACK); // cull back face
// set counter-clock-wise vertex order to mean the front
glFrontFace (GL_CCW);
glClearColor (0.2, 0.2, 0.2, 1.0); // grey background to help spot mistakes
glViewport (0, 0, g_gl_width, g_gl_height);
/*------------------------------CREATE GEOMETRY------------------------------*/
GLfloat* vp = NULL; // array of vertex points
GLfloat* vn = NULL; // array of vertex normals
GLfloat* vt = NULL; // array of texture coordinates
int g_point_count = 0;
assert (load_obj_file (MESH_FILE, vp, vt, vn, g_point_count));
GLuint vao;
glGenVertexArrays (1, &vao);
glBindVertexArray (vao);
GLuint points_vbo;
if (NULL != vp) {
glGenBuffers (1, &points_vbo);
glBindBuffer (GL_ARRAY_BUFFER, points_vbo);
glBufferData (GL_ARRAY_BUFFER, 3 * g_point_count * sizeof (GLfloat),
vp, GL_STATIC_DRAW);
glVertexAttribPointer (0, 3, GL_FLOAT, GL_FALSE, 0, NULL);
glEnableVertexAttribArray (0);
}
GLuint normals_vbo;
if (NULL != vn) {
glGenBuffers (1, &normals_vbo);
glBindBuffer (GL_ARRAY_BUFFER, normals_vbo);
glBufferData (GL_ARRAY_BUFFER, 3 * g_point_count * sizeof (GLfloat),
vn, GL_STATIC_DRAW);
glVertexAttribPointer (1, 3, GL_FLOAT, GL_FALSE, 0, NULL);
glEnableVertexAttribArray (1);
}
GLuint texcoords_vbo;
if (NULL != vp) {
glGenBuffers (1, &texcoords_vbo);
glBindBuffer (GL_ARRAY_BUFFER, texcoords_vbo);
glBufferData (GL_ARRAY_BUFFER, 2 * g_point_count * sizeof (GLfloat),
vp, GL_STATIC_DRAW);
glVertexAttribPointer (2, 2, GL_FLOAT, GL_FALSE, 0, NULL);
glEnableVertexAttribArray (2);
}
/*-------------------------------CREATE SHADERS------------------------------*/
GLuint shader_programme = create_programme_from_files (VERTEX_SHADER_FILE,
FRAGMENT_SHADER_FILE);
int view_mat_location = glGetUniformLocation (shader_programme, "view");
int proj_mat_location = glGetUniformLocation (shader_programme, "proj");
/* if converting to GLSL 410 do this to replace GLSL texture bindings:
GLint diffuse_map_loc, specular_map_loc, ambient_map_loc, emission_map_loc;
diffuse_map_loc = glGetUniformLocation (shader_programme, "diffuse_map");
specular_map_loc = glGetUniformLocation (shader_programme, "specular_map");
ambient_map_loc = glGetUniformLocation (shader_programme, "ambient_map");
emission_map_loc = glGetUniformLocation (shader_programme, "emission_map");
assert (diffuse_map_loc > -1);
assert (specular_map_loc > -1);
assert (ambient_map_loc > -1);
assert (emission_map_loc > -1);
glUseProgram (shader_programme);
glUniform1i (diffuse_map_loc, 0);
glUniform1i (specular_map_loc, 1);
glUniform1i (ambient_map_loc, 2);
glUniform1i (emission_map_loc, 3);
*/
// load texture
GLuint tex_diff, tex_spec, tex_amb, tex_emiss;
glActiveTexture (GL_TEXTURE0);
assert (load_texture ("boulder_diff.png", &tex_diff));
glActiveTexture (GL_TEXTURE1);
assert (load_texture ("boulder_spec.png", &tex_spec));
glActiveTexture (GL_TEXTURE2);
assert (load_texture ("ao.png", &tex_amb));
glActiveTexture (GL_TEXTURE3);
assert (load_texture ("tileable9b_emiss.png", &tex_emiss));
#define ONE_DEG_IN_RAD (2.0 * M_PI) / 360.0 // 0.017444444
// input variables
float near = 0.1f; // clipping plane
float far = 100.0f; // clipping plane
float fov = 67.0f * ONE_DEG_IN_RAD; // convert 67 degrees to radians
float aspect = (float)g_gl_width / (float)g_gl_height; // aspect ratio
// matrix components
float range = tan (fov * 0.5f) * near;
float Sx = (2.0f * near) / (range * aspect + range * aspect);
float Sy = near / range;
float Sz = -(far + near) / (far - near);
float Pz = -(2.0f * far * near) / (far - near);
GLfloat proj_mat[] = {
Sx, 0.0f, 0.0f, 0.0f,
0.0f, Sy, 0.0f, 0.0f,
0.0f, 0.0f, Sz, -1.0f,
0.0f, 0.0f, Pz, 0.0f
};
float cam_speed = 1.0f; // 1 unit per second
float cam_yaw_speed = 10.0f; // 10 degrees per second
// don't start at zero, or we will be too close
float cam_pos[] = {0.0f, 0.0f, 5.0f};
float cam_yaw = 0.0f; // y-rotation in degrees
mat4 T = translate (identity_mat4 (), vec3 (-cam_pos[0], -cam_pos[1],
-cam_pos[2]));
mat4 R = rotate_y_deg (identity_mat4 (), -cam_yaw);
mat4 view_mat = R * T;
glUseProgram (shader_programme);
glUniformMatrix4fv (view_mat_location, 1, GL_FALSE, view_mat.m);
glUniformMatrix4fv (proj_mat_location, 1, GL_FALSE, proj_mat);
while (!glfwWindowShouldClose (g_window)) {
static double previous_seconds = glfwGetTime ();
double current_seconds = glfwGetTime ();
double elapsed_seconds = current_seconds - previous_seconds;
previous_seconds = current_seconds;
_update_fps_counter (g_window);
// wipe the drawing surface clear
glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glViewport (0, 0, g_gl_width, g_gl_height);
glUseProgram (shader_programme);
glBindVertexArray (vao);
// draw points 0-3 from the currently bound VAO with current shader
glDrawArrays (GL_TRIANGLES, 0, g_point_count);
// update other events like input handling
glfwPollEvents ();
// control keys
bool cam_moved = false;
if (glfwGetKey (g_window, GLFW_KEY_A)) {
cam_pos[0] -= cam_speed * elapsed_seconds;
cam_moved = true;
}
if (glfwGetKey (g_window, GLFW_KEY_D)) {
cam_pos[0] += cam_speed * elapsed_seconds;
cam_moved = true;
}
if (glfwGetKey (g_window, GLFW_KEY_PAGE_UP)) {
cam_pos[1] += cam_speed * elapsed_seconds;
cam_moved = true;
}
if (glfwGetKey (g_window, GLFW_KEY_PAGE_DOWN)) {
cam_pos[1] -= cam_speed * elapsed_seconds;
cam_moved = true;
}
if (glfwGetKey (g_window, GLFW_KEY_W)) {
cam_pos[2] -= cam_speed * elapsed_seconds;
cam_moved = true;
}
if (glfwGetKey (g_window, GLFW_KEY_S)) {
cam_pos[2] += cam_speed * elapsed_seconds;
cam_moved = true;
}
if (glfwGetKey (g_window, GLFW_KEY_LEFT)) {
cam_yaw += cam_yaw_speed * elapsed_seconds;
cam_moved = true;
}
if (glfwGetKey (g_window, GLFW_KEY_RIGHT)) {
cam_yaw -= cam_yaw_speed * elapsed_seconds;
cam_moved = true;
}
// update view matrix
if (cam_moved) {
mat4 T = translate (identity_mat4 (), vec3 (-cam_pos[0],
-cam_pos[1], -cam_pos[2])); // cam translation
mat4 R = rotate_y_deg (identity_mat4 (), -cam_yaw); //
mat4 view_mat = R * T;
glUniformMatrix4fv (view_mat_location, 1, GL_FALSE, view_mat.m);
}
if (GLFW_PRESS == glfwGetKey (g_window, GLFW_KEY_ESCAPE)) {
glfwSetWindowShouldClose (g_window, 1);
}
// put the stuff we've been drawing onto the display
glfwSwapBuffers (g_window);
}
// close GL context and any other GLFW resources
glfwTerminate();
return 0;
}
void load_curv(GLuint program, GLuint first_loc)
{
Parameters::getInstance()->g_uniform_locations[first_loc] =
glGetUniformLocation (program, "u_scene_size");
Parameters::getInstance()->g_uniform_locations[first_loc+1] =
glGetUniformLocation (program, "densities");
Parameters::getInstance()->g_uniform_locations[first_loc+2] =
glGetUniformLocation (program, "u_viewport");
Parameters::getInstance()->g_uniform_locations[first_loc+3] =
glGetUniformLocation (program, "solid_wireframe");
Parameters::getInstance()->g_uniform_locations[first_loc+4] =
glGetUniformLocation (program, "u_curv_radius");
Parameters::getInstance()->g_uniform_locations[first_loc+5] =
glGetUniformLocation (program, "u_kmin");
Parameters::getInstance()->g_uniform_locations[first_loc+6] =
glGetUniformLocation (program, "u_kmax");
Parameters::getInstance()->g_uniform_locations[first_loc+7] =
glGetUniformLocation (program, "u_size_tex");
Parameters::getInstance()->g_uniform_locations[first_loc+8] =
glGetUniformLocation(program, "u_curv_dir");
Parameters::getInstance()->g_uniform_locations[first_loc+9] =
glGetUniformLocation(program, "u_curv_val");
Parameters::getInstance()->g_uniform_locations[first_loc+10] =
glGetUniformLocation(program, "u_lvl");
Parameters::getInstance()->g_uniform_locations[first_loc+11] =
glGetUniformLocation(program, "u_triangle_normals");
Parameters::getInstance()->g_uniform_locations[first_loc+12] =
glGetUniformLocation(program, "u_time");
Parameters::getInstance()->g_uniform_locations[first_loc+13] =
glGetUniformLocation(program, "u_spheresubdiv");
/*Parameters::getInstance()->g_uniform_locations[first_loc+7] =
glGetUniformLocation (program, "u_ground_truth");*/
/*Parameters::getInstance()->g_uniform_locations[first_loc+15] =
glGetUniformLocation(program, "u_fromtexture");*/
/*
Parameters::getInstance()->g_uniform_locations[first_loc+12] =
glGetUniformLocation(program, "u_xyz2_tex");
Parameters::getInstance()->g_uniform_locations[first_loc+13] =
glGetUniformLocation(program, "u_xy_yz_xz_tex");
Parameters::getInstance()->g_uniform_locations[first_loc+14] =
glGetUniformLocation(program, "u_xyz_tex");
*/
/*
Parameters::getInstance()->g_uniform_locations[first_loc+3] =
glGetUniformLocation (program, "u_tan_fovy");
Parameters::getInstance()->g_uniform_locations[first_loc+4] =
glGetUniformLocation (program, "u_scale");
*/
/*Parameters::getInstance()->g_uniform_locations[first_loc+6] =
glGetUniformLocation (program, "u_camera_pos");*/
}
int main()
{
glfwInit();
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);
GLFWwindow* window = glfwCreateWindow(800, 600, "Learning some OpenGL", nullptr, nullptr);
glfwMakeContextCurrent(window);
glfwSetKeyCallback(window, key_callback);
//Check to make sure the window is not null. If it is, terminate.
if (window == nullptr)
{
std::cout << "Failed to create GLFW window" << std::endl;
glfwTerminate();
return -1;
}
//Initialise GLEW
//glewExperimental allows us to use modern techniques. Not setting it to true might lead to complications
glewExperimental = GL_TRUE;
if (glewInit() != GLEW_OK)
{
std::cout << "Failed to initialise GLEW" << std::endl;
return -1;
}
//Tell OpenGL the size of the window, or in this case the viewport, that we wish to render to
glViewport(0, 0, 800, 600);
Shader shader("shaders/texture_shader.vs", "shaders/texture_shader.frag");
//Tutorial Three
texture_triangle();
//Simple loop
while (!glfwWindowShouldClose(window))
{
glfwPollEvents();
//Set clear colour to ensure that we're actually rendering something
glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT);
//Bind the texture
glBindTexture(GL_TEXTURE_2D, texture);
glBindTexture(GL_TEXTURE_2D, texture_two);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, texture);
glUniform1i(glGetUniformLocation(shader.Program, "texture_one"), 0);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, texture_two);
glUniform1i(glGetUniformLocation(shader.Program, "texture_two"), 1);
//Get location
GLuint location = glGetUniformLocation(shader.Program, "mix_variable");
glUniform1f(location, mix_variable);
//Drawning
shader.use();
glBindVertexArray(VAO);
glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
glBindVertexArray(0);
glfwSwapBuffers(window);
}
//Cleanup
glDeleteVertexArrays(1, &VAO);
glDeleteBuffers(1, &VBO);
glfwTerminate();
return 0;
}
int main(void)
{
GLFWwindow* window;
window = init("Billboards", 640, 480);
if(!window)
{
return -1;
}
glEnable(GL_DEPTH_TEST);
Camera camera(CAMERA_PERSPECTIVE, 45.0f, 0.1f, 1000.0f, 640.0f, 480.0f);
camera.setPosition(0.0f, 0.0f, -3.0f);
setCamera(&camera); // The camera updating is handled in ../common/util.cpp
glm::mat4 model;
GLuint program;
{
GLuint vertex = createShader(VERTEX_SRC, GL_VERTEX_SHADER);
GLuint fragment = createShader(FRAGMENT_SRC, GL_FRAGMENT_SHADER);
program = createShaderProgram(vertex, fragment);
linkShader(program);
validateShader(program);
glDetachShader(program, vertex);
glDeleteShader(vertex);
glDetachShader(program, fragment);
glDeleteShader(fragment);
}
GLuint billboardProgram;
{
GLuint vertex = createShader(VERTEX_BB_SRC, GL_VERTEX_SHADER);
GLuint fragment = createShader(FRAGMENT_BB_SRC, GL_FRAGMENT_SHADER);
billboardProgram = createShaderProgram(vertex, fragment);
linkShader(billboardProgram);
validateShader(billboardProgram);
glDetachShader(program, vertex);
glDeleteShader(vertex);
glDetachShader(program, fragment);
glDeleteShader(fragment);
}
glUseProgram(program);
GLuint vao;
glGenVertexArrays(1, &vao);
glBindVertexArray(vao);
GLuint vbo;
glGenBuffers(1, &vbo);
float vertices[] =
{
// x y z r g b u v
-0.5f, -0.5f, -0.5f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f,
0.5f, -0.5f, -0.5f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f,
0.5f, 0.5f, -0.5f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f,
0.5f, 0.5f, -0.5f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f,
-0.5f, 0.5f, -0.5f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f,
-0.5f, -0.5f, -0.5f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f,
-0.5f, -0.5f, 0.5f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f,
0.5f, -0.5f, 0.5f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f,
0.5f, 0.5f, 0.5f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f,
-0.5f, 0.5f, 0.5f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f,
-0.5f, -0.5f, 0.5f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f,
-0.5f, 0.5f, 0.5f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f,
-0.5f, 0.5f, -0.5f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f,
-0.5f, -0.5f, -0.5f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f,
-0.5f, -0.5f, -0.5f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f,
-0.5f, -0.5f, 0.5f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f,
-0.5f, 0.5f, 0.5f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f,
0.5f, 0.5f, -0.5f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f,
0.5f, -0.5f, -0.5f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f,
0.5f, -0.5f, -0.5f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f,
0.5f, -0.5f, 0.5f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f,
-0.5f, -0.5f, -0.5f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f,
0.5f, -0.5f, -0.5f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f,
0.5f, -0.5f, 0.5f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f,
0.5f, -0.5f, 0.5f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f,
-0.5f, -0.5f, 0.5f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f,
-0.5f, -0.5f, -0.5f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f,
-0.5f, 0.5f, -0.5f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f,
0.5f, 0.5f, -0.5f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f,
0.5f, 0.5f, 0.5f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f,
-0.5f, 0.5f, 0.5f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f,
-0.5f, 0.5f, -0.5f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f
};
glBindBuffer(GL_ARRAY_BUFFER, vbo);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
glEnableVertexAttribArray(0); // position
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), 0);
glEnableVertexAttribArray(1); // color
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (void*)(3 * sizeof(GLfloat)));
glEnableVertexAttribArray(2); // texture coordinates
glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (void*)(6 * sizeof(GLfloat)));
float verts_bb[] =
{
-0.5f, -0.5f,
0.5f, -0.5f,
-0.5f, 0.5f,
0.5f, 0.5f
};
GLuint vbo_bb;
glGenBuffers(1, &vbo_bb);
GLuint vao_bb;
glGenVertexArrays(1, &vao_bb);
glBindVertexArray(vao_bb);
glBindBuffer(GL_ARRAY_BUFFER, vbo_bb);
glBufferData(GL_ARRAY_BUFFER, sizeof(verts_bb), verts_bb, GL_STATIC_DRAW);
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, 0);
glUseProgram(billboardProgram);
glUniform3f(glGetUniformLocation(billboardProgram, "center"), 0.0f, 2.0f, 0.0f);
glUniform2f(glGetUniformLocation(billboardProgram, "size"), 0.5f, 0.5f);
int w, h;
GLuint texture = loadImage("image.png", &w, &h, 0, false);
glUniform1i(glGetUniformLocation(billboardProgram, "tex"), 0);
glUseProgram(program);
glUniform1i(glGetUniformLocation(program, "tex"), 0);
glClearColor(0.75f, 0.75f, 0.75f, 1.0f);
glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
while(!glfwWindowShouldClose(window))
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
updateCamera(640, 480, window);
// Draw the cube
glUseProgram(program);
glBindVertexArray(vao);
GLint modelUL = glGetUniformLocation(program, "model");
glUniformMatrix4fv(modelUL, 1, GL_FALSE, glm::value_ptr(model));
GLint viewUL = glGetUniformLocation(program, "view");
glUniformMatrix4fv(viewUL, 1, GL_FALSE, glm::value_ptr(camera.getView()));
GLint projUL = glGetUniformLocation(program, "projection");
glUniformMatrix4fv(projUL, 1, GL_FALSE, glm::value_ptr(camera.getProjection()));
glDrawArrays(GL_TRIANGLES, 0, 36);
// Draw the billboard
glBindVertexArray(vao_bb);
glUseProgram(billboardProgram);
viewUL = glGetUniformLocation(billboardProgram, "view");
glUniformMatrix4fv(viewUL, 1, GL_FALSE, glm::value_ptr(camera.getView()));
projUL = glGetUniformLocation(billboardProgram, "proj");
glUniformMatrix4fv(projUL, 1, GL_FALSE, glm::value_ptr(camera.getProjection()));
glUniform1i(glGetUniformLocation(billboardProgram, "fixedSize"), 0);
glUniform3f(glGetUniformLocation(billboardProgram, "camRight"), camera.getRightVector().x, camera.getRightVector().y, camera.getRightVector().z);
glUniform3f(glGetUniformLocation(billboardProgram, "camUp"), camera.getUpVector().x, camera.getUpVector().y, camera.getUpVector().z);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glfwSwapBuffers(window);
glfwPollEvents();
}
// Clean up
glDeleteBuffers(1, &vbo);
glDeleteVertexArrays(1, &vao);
glDeleteBuffers(1, &vbo_bb);
glDeleteVertexArrays(1, &vao_bb);
glDeleteProgram(program);
glDeleteProgram(billboardProgram);
glDeleteTextures(1, &texture);
glfwTerminate();
return 0;
}
static void
Init(void)
{
static const char *fragShaderText =
"uniform float StipplePattern[16]; \n"
"varying vec2 stippleCoord; \n"
"void main() \n"
"{ \n"
" // check the stipple pattern and discard if value is zero \n"
" // TODO: we should really undo the perspective interpolation here \n"
" // so that it's linear. \n"
" float stip = StipplePattern[int(fract(stippleCoord.x) * 16.0)]; \n"
" if (stip == 0.0) \n"
" discard; \n"
" gl_FragColor = gl_Color; \n"
"} \n";
static const char *vertShaderText =
"void main() \n"
"{ \n"
" gl_FrontColor = gl_Color; \n"
" gl_Position = ftransform(); \n"
"} \n";
static const char *geomShaderText =
"#version 150 \n"
"#extension GL_ARB_geometry_shader4: enable \n"
"uniform vec2 ViewportSize; \n"
"uniform float StippleFactor; \n"
"out vec2 stippleCoord; \n"
"void main() \n"
"{ \n"
" vec4 pos0 = gl_PositionIn[0]; \n"
" vec4 pos1 = gl_PositionIn[1]; \n"
" // Convert eye coords to window coords \n"
" // Note: we're off by a factor of two here, make up for that below \n"
" vec2 p0 = pos0.xy / pos0.w * ViewportSize; \n"
" vec2 p1 = pos1.xy / pos1.w * ViewportSize; \n"
" float len = length(p0.xy - p1.xy); \n"
" // Emit first vertex \n"
" gl_FrontColor = gl_FrontColorIn[0]; \n"
" gl_Position = pos0; \n"
" stippleCoord.x = 0.0; \n"
" EmitVertex(); \n"
" // Emit second vertex \n"
" gl_FrontColor = gl_FrontColorIn[1]; \n"
" gl_Position = pos1; \n"
" stippleCoord.x = len / StippleFactor / 32.0; // Note: not 16, see above \n"
" EmitVertex(); \n"
"} \n";
if (!ShadersSupported())
exit(1);
if (!glutExtensionSupported("GL_ARB_geometry_shader4")) {
fprintf(stderr, "Sorry, GL_ARB_geometry_shader4 is not supported.\n");
exit(1);
}
VertShader = CompileShaderText(GL_VERTEX_SHADER, vertShaderText);
FragShader = CompileShaderText(GL_FRAGMENT_SHADER, fragShaderText);
GeomShader = CompileShaderText(GL_GEOMETRY_SHADER_ARB, geomShaderText);
assert(GeomShader);
Program = LinkShaders3(VertShader, GeomShader, FragShader);
assert(Program);
CheckError(__LINE__);
/*
* The geometry shader accepts lines and produces lines.
*/
glProgramParameteriARB(Program, GL_GEOMETRY_INPUT_TYPE_ARB,
GL_LINES);
glProgramParameteriARB(Program, GL_GEOMETRY_OUTPUT_TYPE_ARB,
GL_LINE_STRIP);
glProgramParameteriARB(Program, GL_GEOMETRY_VERTICES_OUT_ARB, 4);
CheckError(__LINE__);
glLinkProgramARB(Program);
/* check link */
{
GLint stat;
GetProgramiv(Program, GL_LINK_STATUS, &stat);
if (!stat) {
GLchar log[1000];
GLsizei len;
GetProgramInfoLog(Program, 1000, &len, log);
fprintf(stderr, "Shader link error:\n%s\n", log);
}
}
glUseProgram(Program);
uViewportSize = glGetUniformLocation(Program, "ViewportSize");
uStippleFactor = glGetUniformLocation(Program, "StippleFactor");
uStipplePattern = glGetUniformLocation(Program, "StipplePattern");
glUniform1f(uStippleFactor, StippleFactor);
glClearColor(0.3f, 0.3f, 0.3f, 0.0f);
printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
assert(glIsProgram(Program));
assert(glIsShader(FragShader));
assert(glIsShader(VertShader));
assert(glIsShader(GeomShader));
glLineStipple(StippleFactor, StipplePattern);
SetStippleUniform(StippleFactor, StipplePattern);
MakePoints();
}
bool ParticleSystem::initGL(void)
{
INFO("Initializing OpenGL subsystem");
/* compile shaders */
//if (!m_shader.build(m_vert_shader, m_frag_shader))
if (!m_shader_particle_colors.buildFiles(utils::fs::AssetsPath(m_vert_shader_particle_colors_file),
utils::fs::AssetsPath(m_frag_shader_particle_colors_file)))
{
ERROR("Failed to compile shaders for particle colors program");
return false;
}
if (!m_shader_uniform_color.buildFiles(utils::fs::AssetsPath(m_vert_shader_uniform_color_file),
utils::fs::AssetsPath(m_frag_shader_uniform_color_file)))
{
ERROR("Failed to compile shaders for uniform color program");
return false;
}
if (!m_shader_bounding_volume.buildFiles(utils::fs::AssetsPath(m_vert_shader_bounding_volume_file),
utils::fs::AssetsPath(m_frag_shader_bounding_volume_file)))
{
ERROR("Failed to compile shaders for bounding volume program");
return false;
}
/* per particle colors program */
GLuint pc_prog = m_shader_particle_colors.getID();
glUseProgram(pc_prog);
//glUniform3f(glGetUniformLocation(prog, "light_pos"), 0.0f, 0.0f, -1.0f); // shader assumes the position is normalized
//glUniform3f(glGetUniformLocation(prog, "light_pos"), -1.0f, 1.0f, -1.0f);
glUniform3f(glGetUniformLocation(pc_prog, "light_pos"), -10.0f, 10.0f, 15.0f);
glUniform3f(glGetUniformLocation(pc_prog, "light_col_a"), 0.8f, 0.8f, 0.8f);
glUniform3f(glGetUniformLocation(pc_prog, "light_col_d"), 1.0f, 1.0f, 1.0f);
glUniform3f(glGetUniformLocation(pc_prog, "light_col_s"), 1.0f, 1.0f, 1.0f);
/* uniform color program */
GLuint uc_prog = m_shader_uniform_color.getID();
glUseProgram(uc_prog);
glUniform3f(glGetUniformLocation(uc_prog, "light_pos"), -10.0f, 10.0f, 15.0f);
glUniform3f(glGetUniformLocation(uc_prog, "light_col_a"), 0.8f, 0.8f, 0.8f);
glUniform3f(glGetUniformLocation(uc_prog, "light_col_d"), 1.0f, 1.0f, 1.0f);
glUniform3f(glGetUniformLocation(uc_prog, "light_col_s"), 1.0f, 1.0f, 1.0f);
glUniform3f(glGetUniformLocation(uc_prog, "particle_col"), 0.5f, 0.5f, 1.0f);
/* bounding volume program */
GLuint bv_prog = m_shader_bounding_volume.getID();
glUseProgram(bv_prog);
glUniform3f(glGetUniformLocation(bv_prog, "dimensions"),
(m_volume_max.s[0] - m_volume_min.s[0]) * 0.5f,
(m_volume_max.s[1] - m_volume_min.s[1]) * 0.5f,
(m_volume_max.s[2] - m_volume_min.s[2]) * 0.5f);
glUniform3f(glGetUniformLocation(bv_prog, "col"), 1.0f, 1.0f, 1.0f);
glUseProgram(0);
/* load models */
if (!geom::genSphere(m_particle_geom))
//if (!geom::genPrism(m_particle_geom))
{
ERROR("Failed to generate sphere model");
return false;
}
return true;
}
void FaceCullingComponent::Draw(float DeltaSeconds)
{
mShaderContainer.UseProgram();
glBindVertexArray(mVAO);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, mTextureDiffuse);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, mTextureSpecular);
//Set up uniforms
// MODEL, VIEW, PROJECTION
GLint modelLocation = glGetUniformLocation(mShaderContainer.Program(), "model");
if (modelLocation == -1)
{
cout << "Model location = -1" << endl;
return;
}
GLint viewLocation = glGetUniformLocation(mShaderContainer.Program(), "view");
if (viewLocation == -1)
{
cout << "View location = -1" << endl;
return;
}
GLint projectionLocation = glGetUniformLocation(mShaderContainer.Program(), "projection");
if (projectionLocation == -1)
{
cout << "Projection location = -1" << endl;
return;
}
glUniformMatrix4fv(viewLocation, 1, GL_FALSE, glm::value_ptr(mCamera->GetViewMatrix()));
glUniformMatrix4fv(projectionLocation, 1, GL_FALSE, glm::value_ptr(mCamera->GetProjectionMatrix()));
//TODO: look for steel propoerties for the steel borders (shininess)
// MATERIAL PROPERTIES
GLint matDiffuseLocation = glGetUniformLocation(mShaderContainer.Program(), "material.diffuse");
GLint matSpecularLocation = glGetUniformLocation(mShaderContainer.Program(), "material.specular");
GLint matShineLocation = glGetUniformLocation(mShaderContainer.Program(), "material.shininess");
glUniform1i(matDiffuseLocation, 0);
glUniform1i(matSpecularLocation, 1);
glUniform1f(matShineLocation, 8.0f);
//DIRECTIONAL LIGHT
GLint lightDirectionLocation;
GLint lightAmbientLocation;
GLint lightDiffuseLocation;
GLint lightSpecularLocation;
lightDirectionLocation = glGetUniformLocation(mShaderContainer.Program(), "directionalLight.direction");
lightAmbientLocation = glGetUniformLocation(mShaderContainer.Program(), "directionalLight.ambient");
lightDiffuseLocation = glGetUniformLocation(mShaderContainer.Program(), "directionalLight.diffuse");
lightSpecularLocation = glGetUniformLocation(mShaderContainer.Program(), "directionalLight.specular");
glUniform3f(lightDirectionLocation, -0.2f, -1.0f, -0.3f);
glUniform3f(lightAmbientLocation, 0.2f, 0.2f, 0.2f);
glUniform3f(lightDiffuseLocation, 1.0f, 1.0f, 1.0f); // Let’s darken the light a bit to fit the scene
glUniform3f(lightSpecularLocation, 1.0f, 1.0f, 1.0f);
// POINT LIGHT
GLint lightPositionLocation;
for (int i = 0; i < mPointLightPositions.size(); ++i)
{
lightPositionLocation = glGetUniformLocation(mShaderContainer.Program(), ("pointLights[" + std::to_string(i) + "].position").c_str());
lightAmbientLocation = glGetUniformLocation(mShaderContainer.Program(), ("pointLights[" + std::to_string(i) + "].ambient").c_str());
lightDiffuseLocation = glGetUniformLocation(mShaderContainer.Program(), ("pointLights[" + std::to_string(i) + "].diffuse").c_str());
lightSpecularLocation = glGetUniformLocation(mShaderContainer.Program(), ("pointLights[" + std::to_string(i) + "].specular").c_str());
GLint lightIntensityLocation = glGetUniformLocation(mShaderContainer.Program(), ("pointLights[" + std::to_string(i) + "].intensity").c_str());
GLint lightKcLocation = glGetUniformLocation(mShaderContainer.Program(), ("pointLights[" + std::to_string(i) + "].Kc").c_str());
GLint lightKlLocation = glGetUniformLocation(mShaderContainer.Program(), ("pointLights[" + std::to_string(i) + "].Kl").c_str());
GLint lightKqLocation = glGetUniformLocation(mShaderContainer.Program(), ("pointLights[" + std::to_string(i) + "].Kq").c_str());
glUniform3f(lightPositionLocation, mPointLightPositions[i].x, mPointLightPositions[i].y, mPointLightPositions[i].z);
glUniform3f(lightAmbientLocation, 0.2f, 0.2f, 0.2f);
glUniform3f(lightDiffuseLocation, 1.0f, 1.0f, 1.0f);
glUniform3f(lightSpecularLocation, 1.0f, 1.0f, 1.0f);
glUniform1f(lightIntensityLocation, 0.5f);
glUniform1f(lightKcLocation, 1.0f);
glUniform1f(lightKlLocation, 0.09f);
glUniform1f(lightKqLocation, 0.032f);
}
//Camera position and direction
GLint cameraPositionLocation = glGetUniformLocation(mShaderContainer.Program(), "cameraPosition");
glm::vec3 camPos = mCamera->GetPosition();
glm::vec3 camDirection = mCamera->GetDirection();
glUniform3f(cameraPositionLocation, camPos.x, camPos.y, camPos.z);
// SPOT LIGHT
lightPositionLocation = glGetUniformLocation(mShaderContainer.Program(), "spotLight.position");
lightDirectionLocation = glGetUniformLocation(mShaderContainer.Program(), "spotLight.direction");
GLint lightInnerAngleLocation = glGetUniformLocation(mShaderContainer.Program(), "spotLight.innerAngle");
GLint lightOuterAngleLocation = glGetUniformLocation(mShaderContainer.Program(), "spotLight.outerAngle");
lightAmbientLocation = glGetUniformLocation(mShaderContainer.Program(), "spotLight.ambient");
lightDiffuseLocation = glGetUniformLocation(mShaderContainer.Program(), "spotLight.diffuse");
lightSpecularLocation = glGetUniformLocation(mShaderContainer.Program(), "spotLight.specular");
glUniform3f(lightPositionLocation, camPos.x, camPos.y, camPos.z); //We use the camera's position, simulating a flashlight (follows the player)
glUniform3f(lightDirectionLocation, camDirection.x, camDirection.y, camDirection.z);
glUniform1f(lightInnerAngleLocation, glm::radians(5.0f));
glUniform1f(lightOuterAngleLocation, glm::radians(20.0f)); //TODO: implement attenuation, the spot light shines infinitely.
glUniform3f(lightAmbientLocation, 0.2f, 0.2f, 0.2f);
glUniform3f(lightDiffuseLocation, 1.0f, 1.0f, 1.0f);
glUniform3f(lightSpecularLocation, 1.0f, 1.0f, 1.0f);
for (size_t i = 0; i < mCubePositions.size(); ++i)
{
glm::mat4 model;
model = glm::translate(glm::mat4(), mCubePositions[i]);
float angle = 20.0f * i;
model = glm::rotate(model, glm::radians(angle), glm::vec3(0.2f, 0.5f, 0.5f));
glUniformMatrix4fv(modelLocation, 1, GL_FALSE, glm::value_ptr(model));
glDrawArrays(GL_TRIANGLES, 0, 36);
}
mShaderLight.UseProgram();
//Set up uniforms
modelLocation = glGetUniformLocation(mShaderLight.Program(), "model");
if (modelLocation == -1)
{
cout << "Model location = -1" << endl;
return;
}
viewLocation = glGetUniformLocation(mShaderLight.Program(), "view");
if (viewLocation == -1)
{
cout << "View location = -1" << endl;
return;
}
projectionLocation = glGetUniformLocation(mShaderLight.Program(), "projection");
if (projectionLocation == -1)
{
cout << "Projection location = -1" << endl;
return;
}
glUniformMatrix4fv(viewLocation, 1, GL_FALSE, glm::value_ptr(mCamera->GetViewMatrix()));
glUniformMatrix4fv(projectionLocation, 1, GL_FALSE, glm::value_ptr(mCamera->GetProjectionMatrix()));
for (int i = 0; i < mPointLightPositions.size(); ++i)
{
glUniformMatrix4fv(modelLocation, 1, GL_FALSE, glm::value_ptr(glm::translate(glm::mat4(), mPointLightPositions[i])));
glDrawArrays(GL_TRIANGLES, 0, 36);
}
glUseProgram(0);
glBindVertexArray(0);
}
bool CGUIManager::CreateDeviceObjects()
{
Window->MakeContextCurrent();
// Backup GL state
GLint last_texture, last_array_buffer, last_vertex_array;
glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture);
glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &last_array_buffer);
glGetIntegerv(GL_VERTEX_ARRAY_BINDING, &last_vertex_array);
const GLchar *vertex_shader =
"#version 330\n"
"uniform mat4 ProjMtx;\n"
"in vec2 Position;\n"
"in vec2 UV;\n"
"in vec4 Color;\n"
"out vec2 Frag_UV;\n"
"out vec4 Frag_Color;\n"
"void main()\n"
"{\n"
" Frag_UV = UV;\n"
" Frag_Color = Color;\n"
" gl_Position = ProjMtx * vec4(Position.xy,0,1);\n"
"}\n";
const GLchar* fragment_shader =
"#version 330\n"
"uniform sampler2D Texture;\n"
"in vec2 Frag_UV;\n"
"in vec4 Frag_Color;\n"
"out vec4 Out_Color;\n"
"void main()\n"
"{\n"
" Out_Color = Frag_Color * texture( Texture, Frag_UV.st);\n"
"}\n";
ShaderHandle = glCreateProgram();
VertHandle = glCreateShader(GL_VERTEX_SHADER);
FragHandle = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(VertHandle, 1, &vertex_shader, 0);
glShaderSource(FragHandle, 1, &fragment_shader, 0);
glCompileShader(VertHandle);
glCompileShader(FragHandle);
glAttachShader(ShaderHandle, VertHandle);
glAttachShader(ShaderHandle, FragHandle);
glLinkProgram(ShaderHandle);
AttribLocationTex = glGetUniformLocation(ShaderHandle, "Texture");
AttribLocationProjMtx = glGetUniformLocation(ShaderHandle, "ProjMtx");
AttribLocationPosition = glGetAttribLocation(ShaderHandle, "Position");
AttribLocationUV = glGetAttribLocation(ShaderHandle, "UV");
AttribLocationColor = glGetAttribLocation(ShaderHandle, "Color");
glGenBuffers(1, &VboHandle);
glGenBuffers(1, &ElementsHandle);
glGenVertexArrays(1, &VaoHandle);
glBindVertexArray(VaoHandle);
glBindBuffer(GL_ARRAY_BUFFER, VboHandle);
glEnableVertexAttribArray(AttribLocationPosition);
glEnableVertexAttribArray(AttribLocationUV);
glEnableVertexAttribArray(AttribLocationColor);
#define OFFSETOF(TYPE, ELEMENT) ((size_t)&(((TYPE *)0)->ELEMENT))
glVertexAttribPointer(AttribLocationPosition, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*) OFFSETOF(ImDrawVert, pos));
glVertexAttribPointer(AttribLocationUV, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*) OFFSETOF(ImDrawVert, uv));
glVertexAttribPointer(AttribLocationColor, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(ImDrawVert), (GLvoid*) OFFSETOF(ImDrawVert, col));
#undef OFFSETOF
CreateFontsTexture();
// Restore modified GL state
glBindTexture(GL_TEXTURE_2D, last_texture);
glBindBuffer(GL_ARRAY_BUFFER, last_array_buffer);
glBindVertexArray(last_vertex_array);
return true;
}
int GPU_shader_get_uniform(GPUShader *shader, const char *name)
{
return glGetUniformLocation(shader->program, name);
}
GPUShader *GPU_shader_create_ex(const char *vertexcode,
const char *fragcode,
const char *geocode,
const char *libcode,
const char *defines,
int input,
int output,
int number,
const int flags)
{
#ifdef WITH_OPENSUBDIV
/* TODO(sergey): used to add #version 150 to the geometry shader.
* Could safely be renamed to "use_geometry_code" since it's very
* likely any of geometry code will want to use GLSL 1.5.
*/
bool use_opensubdiv = (flags & GPU_SHADER_FLAGS_SPECIAL_OPENSUBDIV) != 0;
#else
UNUSED_VARS(flags);
bool use_opensubdiv = false;
#endif
GLint status;
GLchar log[5000];
GLsizei length = 0;
GPUShader *shader;
char standard_defines[MAX_DEFINE_LENGTH] = "";
char standard_extensions[MAX_EXT_DEFINE_LENGTH] = "";
if (geocode && !GPU_geometry_shader_support())
return NULL;
shader = MEM_callocN(sizeof(GPUShader), "GPUShader");
if (vertexcode)
shader->vertex = glCreateShader(GL_VERTEX_SHADER);
if (fragcode)
shader->fragment = glCreateShader(GL_FRAGMENT_SHADER);
if (geocode)
shader->geometry = glCreateShader(GL_GEOMETRY_SHADER_EXT);
shader->program = glCreateProgram();
if (!shader->program ||
(vertexcode && !shader->vertex) ||
(fragcode && !shader->fragment) ||
(geocode && !shader->geometry))
{
fprintf(stderr, "GPUShader, object creation failed.\n");
GPU_shader_free(shader);
return NULL;
}
gpu_shader_standard_defines(standard_defines,
use_opensubdiv,
(flags & GPU_SHADER_FLAGS_NEW_SHADING) != 0);
gpu_shader_standard_extensions(standard_extensions, geocode != NULL);
if (vertexcode) {
const char *source[5];
/* custom limit, may be too small, beware */
int num_source = 0;
source[num_source++] = gpu_shader_version();
source[num_source++] = standard_extensions;
source[num_source++] = standard_defines;
if (defines) source[num_source++] = defines;
source[num_source++] = vertexcode;
glAttachShader(shader->program, shader->vertex);
glShaderSource(shader->vertex, num_source, source, NULL);
glCompileShader(shader->vertex);
glGetShaderiv(shader->vertex, GL_COMPILE_STATUS, &status);
if (!status) {
glGetShaderInfoLog(shader->vertex, sizeof(log), &length, log);
shader_print_errors("compile", log, source, num_source);
GPU_shader_free(shader);
return NULL;
}
}
if (fragcode) {
const char *source[7];
int num_source = 0;
source[num_source++] = gpu_shader_version();
source[num_source++] = standard_extensions;
source[num_source++] = standard_defines;
#ifdef WITH_OPENSUBDIV
/* TODO(sergey): Move to fragment shader source code generation. */
if (use_opensubdiv) {
source[num_source++] =
"#ifdef USE_OPENSUBDIV\n"
"in block {\n"
" VertexData v;\n"
"} inpt;\n"
"#endif\n";
}
#endif
if (defines) source[num_source++] = defines;
if (libcode) source[num_source++] = libcode;
source[num_source++] = fragcode;
glAttachShader(shader->program, shader->fragment);
glShaderSource(shader->fragment, num_source, source, NULL);
glCompileShader(shader->fragment);
glGetShaderiv(shader->fragment, GL_COMPILE_STATUS, &status);
if (!status) {
glGetShaderInfoLog(shader->fragment, sizeof(log), &length, log);
shader_print_errors("compile", log, source, num_source);
GPU_shader_free(shader);
return NULL;
}
}
if (geocode) {
const char *source[6];
int num_source = 0;
source[num_source++] = gpu_shader_version();
source[num_source++] = standard_extensions;
source[num_source++] = standard_defines;
if (defines) source[num_source++] = defines;
source[num_source++] = geocode;
glAttachShader(shader->program, shader->geometry);
glShaderSource(shader->geometry, num_source, source, NULL);
glCompileShader(shader->geometry);
glGetShaderiv(shader->geometry, GL_COMPILE_STATUS, &status);
if (!status) {
glGetShaderInfoLog(shader->geometry, sizeof(log), &length, log);
shader_print_errors("compile", log, source, num_source);
GPU_shader_free(shader);
return NULL;
}
if (!use_opensubdiv) {
GPU_shader_geometry_stage_primitive_io(shader, input, output, number);
}
}
#ifdef WITH_OPENSUBDIV
if (use_opensubdiv) {
glBindAttribLocation(shader->program, 0, "position");
glBindAttribLocation(shader->program, 1, "normal");
GPU_shader_geometry_stage_primitive_io(shader,
GL_LINES_ADJACENCY_EXT,
GL_TRIANGLE_STRIP,
4);
}
#endif
glLinkProgram(shader->program);
glGetProgramiv(shader->program, GL_LINK_STATUS, &status);
if (!status) {
glGetProgramInfoLog(shader->program, sizeof(log), &length, log);
/* print attached shaders in pipeline order */
if (vertexcode) shader_print_errors("linking", log, &vertexcode, 1);
if (geocode) shader_print_errors("linking", log, &geocode, 1);
if (libcode) shader_print_errors("linking", log, &libcode, 1);
if (fragcode) shader_print_errors("linking", log, &fragcode, 1);
GPU_shader_free(shader);
return NULL;
}
#ifdef WITH_OPENSUBDIV
/* TODO(sergey): Find a better place for this. */
if (use_opensubdiv && GLEW_VERSION_4_1) {
glProgramUniform1i(shader->program,
glGetUniformLocation(shader->program, "FVarDataBuffer"),
31); /* GL_TEXTURE31 */
}
#endif
return shader;
}
/////////////////////////////////
// Initialize function
/////////////////////////////////
void init() {
/*select clearing (background) color*/
glClearColor(0.0, 0.0, 0.0, 1.0);
rotateYEarth = 1;
rotateZEarth = 1;
//populate our arrays
//spherevertcount = generateSphere(2, 30);
vec4 sphereverts[2592];
vec2 spheretexcoords[2592]; // 2592
vec3 spherenormals[2592];
vec4 spheretangents[2592];
vec4 cloudverts[2592];
vec2 cloudtexcoords[2592]; // 2592
vec3 cloudnormals[2592];
vec4 cloudtangents[2592];
CreateSphere(sphereverts, spheretexcoords, spherenormals, spheretangents, 2, 0,0,0);
// create cloud
CreateSphere(cloudverts, cloudtexcoords, cloudnormals, cloudtangents, 2, 0,0,0);
/////////////////////////////////////////
// Create a vertex array object
spherevao = new GLuint[1];
spherevbo = new GLuint[3];
cloudvao = new GLuint[1];
cloudvbo = new GLuint[3];
//////////////////////////
// earth buffer
//////////////////////////
glGenVertexArrays( 1, &spherevao[0] );
// Create and initialize any buffer objects
glBindVertexArray( spherevao[0] );
glGenBuffers( 2, &spherevbo[0] );
glBindBuffer( GL_ARRAY_BUFFER, spherevbo[0] );
glBufferData( GL_ARRAY_BUFFER, VertexCount*sizeof(vec4), sphereverts, GL_STATIC_DRAW);
glBindBuffer( GL_ARRAY_BUFFER, spherevbo[1] );
glBufferData( GL_ARRAY_BUFFER, VertexCount*sizeof(vec2), spheretexcoords, GL_STATIC_DRAW);
glBindBuffer( GL_ARRAY_BUFFER, spherevbo[2] );
glBufferData( GL_ARRAY_BUFFER, VertexCount*sizeof(vec3), spherenormals, GL_STATIC_DRAW);
//////////////////////
// Cloud buffer
//////////////////////
glGenVertexArrays( 1, &cloudvao[0] );
// Create and initialize any buffer objects
glBindVertexArray( cloudvao[0] );
glGenBuffers( 2, &cloudvbo[0] );
glBindBuffer( GL_ARRAY_BUFFER, cloudvbo[0] );
glBufferData( GL_ARRAY_BUFFER, VertexCount*sizeof(vec4), cloudverts, GL_STATIC_DRAW);
glBindBuffer( GL_ARRAY_BUFFER, cloudvbo[1] );
glBufferData( GL_ARRAY_BUFFER, VertexCount*sizeof(vec2), cloudtexcoords, GL_STATIC_DRAW);
glBindBuffer( GL_ARRAY_BUFFER, cloudvbo[2] );
glBufferData( GL_ARRAY_BUFFER, VertexCount*sizeof(vec3), cloudnormals, GL_STATIC_DRAW);
// Load shaders and use the resulting shader program
programAllFeatures = InitShader( "vshader-phongshading.glsl", "fshader-phongshading.glsl" );
programColor = InitShader( "vshader-color.glsl", "fshader-color.glsl" );
programCloud = InitShader( "vshader-cloud.glsl", "fshader-cloud.glsl" );
glUseProgram(programAllFeatures);
// Create a vertex array object
// glGenVertexArrays( 1, &vao[0] );
// // Create and initialize any buffer objects
//glBindVertexArray( vao[0] );
//glGenBuffers( 2, &vbo[0] );
// glBindBuffer( GL_ARRAY_BUFFER, vbo[0] );
// glBufferData( GL_ARRAY_BUFFER, spherevertcount*sizeof(vec4), sphere_verts, GL_STATIC_DRAW);
//
////and now our colors for each vertex
//glBindBuffer( GL_ARRAY_BUFFER, vbo[1] );
//glBufferData( GL_ARRAY_BUFFER, spherevertcount*sizeof(vec3), sphere_normals, GL_STATIC_DRAW );
// setupShader(programAllFeatures);
model_view = glGetUniformLocation(programAllFeatures, "model_view");
projection = glGetUniformLocation(programAllFeatures, "projection");
setupEarthShader(programAllFeatures, spherevao, spherevbo);
// set up cloud shader
// This is where I have error that whenever I use setupearthshader for cloud
// I have bad images rendered.
// I don't understand and keep looking errors why but give up cloud
// setupEarthShader(programCloud, cloudvao, cloudvbo);
glUseProgram(programAllFeatures);
ILuint ilTexID[5]; /* ILuint is a 32bit unsigned integer.
//Variable texid will be used to store image name. */
ilInit(); /* Initialization of OpenIL */
ilGenImages(5, ilTexID); /* Generation of three image names for OpenIL image loading */
glGenTextures(5, texName); //and we eventually want the data in an OpenGL texture
/////////////////////////////////////////
// EARTH BUFFERS
////////////////////////////////////////////////////
// load color map
if ( true )
{
ilBindImage(ilTexID[0]); /* Binding of IL image name */
loadTexFile("images/Earth.png");
glBindTexture(GL_TEXTURE_2D, texName[0]); //bind OpenGL texture name
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR_MIPMAP_LINEAR); //GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); //GL_NEAREST);
//Note how we depend on OpenIL to supply information about the file we just loaded in
glTexImage2D(GL_TEXTURE_2D, 0, ilGetInteger(IL_IMAGE_BPP), ilGetInteger(IL_IMAGE_WIDTH), ilGetInteger(IL_IMAGE_HEIGHT),0,
ilGetInteger(IL_IMAGE_FORMAT), ilGetInteger(IL_IMAGE_TYPE), ilGetData());
glGenerateMipmap(GL_TEXTURE_2D);
}
// load cloud
if (true)
{
glUseProgram(programCloud);
ilBindImage(ilTexID[1]); /* Binding of IL image name */
glBindTexture(GL_TEXTURE_2D, texName[1]); //bind OpenGL texture name
loadTexFile("images/earthcloudmap.png");
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR_MIPMAP_LINEAR); //GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); //GL_NEAREST);
//Note how we depend on OpenIL to supply information about the file we just loaded in
glTexImage2D(GL_TEXTURE_2D, 0, ilGetInteger(IL_IMAGE_BPP), ilGetInteger(IL_IMAGE_WIDTH), ilGetInteger(IL_IMAGE_HEIGHT),0,
ilGetInteger(IL_IMAGE_FORMAT), ilGetInteger(IL_IMAGE_TYPE), ilGetData());
glGenerateMipmap(GL_TEXTURE_2D);
}
// Spec map
if (true)
{
glUseProgram(programAllFeatures);
ilBindImage(ilTexID[2]); /* Binding of IL image name */
glBindTexture(GL_TEXTURE_2D, texName[2]); //bind OpenGL texture name
loadTexFile("images/EarthSpec.png");
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR_MIPMAP_LINEAR); //GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); //GL_NEAREST);
//Note how we depend on OpenIL to supply information about the file we just loaded in
glTexImage2D(GL_TEXTURE_2D, 0, ilGetInteger(IL_IMAGE_BPP), ilGetInteger(IL_IMAGE_WIDTH), ilGetInteger(IL_IMAGE_HEIGHT),0,
ilGetInteger(IL_IMAGE_FORMAT), ilGetInteger(IL_IMAGE_TYPE), ilGetData());
glGenerateMipmap(GL_TEXTURE_2D);
}
// Normal map
if (true)
{
ilBindImage(ilTexID[3]); /* Binding of IL image name */
glBindTexture(GL_TEXTURE_2D, texName[3]); //bind OpenGL texture name
loadTexFile("images/EarthNormal.png");
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR_MIPMAP_LINEAR); //GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); //GL_NEAREST);
//Note how we depend on OpenIL to supply information about the file we just loaded in
glTexImage2D(GL_TEXTURE_2D, 0, ilGetInteger(IL_IMAGE_BPP), ilGetInteger(IL_IMAGE_WIDTH), ilGetInteger(IL_IMAGE_HEIGHT),0,
ilGetInteger(IL_IMAGE_FORMAT), ilGetInteger(IL_IMAGE_TYPE), ilGetData());
glGenerateMipmap(GL_TEXTURE_2D);
}
// Night map
if (true)
{
ilBindImage(ilTexID[4]); /* Binding of IL image name */
glBindTexture(GL_TEXTURE_2D, texName[4]); //bind OpenGL texture name
loadTexFile("images/EarthNight.png");
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR_MIPMAP_LINEAR); //GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); //GL_NEAREST);
//Note how we depend on OpenIL to supply information about the file we just loaded in
glTexImage2D(GL_TEXTURE_2D, 0, ilGetInteger(IL_IMAGE_BPP), ilGetInteger(IL_IMAGE_WIDTH), ilGetInteger(IL_IMAGE_HEIGHT),0,
ilGetInteger(IL_IMAGE_FORMAT), ilGetInteger(IL_IMAGE_TYPE), ilGetData());
glGenerateMipmap(GL_TEXTURE_2D);
}
////////////////////////////////////////////////
ilDeleteImages(5, ilTexID); //we're done with OpenIL, so free up the memory
////////////////////////////////////////////////////
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
texMap = glGetUniformLocation(programAllFeatures, "texture");
glUniform1i(texMap, 0);//assign this one to texture unit 0
cloudMap = glGetUniformLocation(programCloud, "cloudtexture");
glUniform1i(cloudMap, 1);//assign cloud map to texture unit 1
specMap = glGetUniformLocation(programAllFeatures, "spectexture");
glUniform1i(specMap, 2);//assign spec map to 2 texture unit
normalMap = glGetUniformLocation(programAllFeatures, "normalMap");
glUniform1i(normalMap, 3);//assign normal map to 3 texture unit
nightMap = glGetUniformLocation(programAllFeatures, "nighttexture");
glUniform1i(nightMap, 4);//assign spec map to 4 texture unit
// setup lightning
vAmbientDiffuseColor = glGetAttribLocation(programAllFeatures, "vAmbientDiffuseColor");
vSpecularColor = glGetAttribLocation(programAllFeatures, "vSpecularColor");
vSpecularExponent = glGetAttribLocation(programAllFeatures, "vSpecularExponent");
light_position = glGetUniformLocation(programAllFeatures, "light_position");
light_color = glGetUniformLocation(programAllFeatures, "light_color");
ambient_light = glGetUniformLocation(programAllFeatures, "ambient_light");
//Only draw the things in the front layer
glEnable(GL_DEPTH_TEST);
}
/////////////////////////////////////////
// Display
/////////////////////////////////////////
void display(void)
{
/*clear all pixels*/
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
mv = LookAt(vec4(0, 0, 10+z_distance, 1.0), vec4(0, 0, 0, 1.0), vec4(0, 1, 0, 0.0)) * RotateX(-90) * RotateZ(rotateZEarth);
//mv = mv * RotateY(view_roty) ;//RotateZ(view_rotz); //RotateX(view_rotx)
//////////////////////////////
// Display all features
/////////////////////////////
if ( true )
{
glUseProgram(programAllFeatures);
model_view = glGetUniformLocation(programAllFeatures, "model_view");
projection = glGetUniformLocation(programAllFeatures, "projection");
stack.push(mv);
mv = mv*Scale(2,2,2);
glUniformMatrix4fv(model_view, 1, GL_TRUE, mv);
glVertexAttrib4fv(vAmbientDiffuseColor, vec4(.7, 0.7, 0.7, 1));
glVertexAttrib4fv(vSpecularColor, vec4(1.0f,1.0f,1.0f,1.0f));
glVertexAttrib1f(vSpecularExponent, 50.0);
glUniform4fv(light_position, 1, vec4(50.0, 0.0, 0.0, 1));
glUniform4fv(light_color, 1, vec4(1,1,1,1));
glUniform4fv(ambient_light, 1, vec4(.5, .5, .5, 5));
// texture unit 0 : color earth
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, texName[0]); //which texture do we want?
glDrawArrays( GL_QUAD_STRIP, 0, VertexCount );
mv = stack.pop();
// texture unit 1 : cloud earth
//stack.push(mv);
//mv = mv*Scale(2.05,2.05,2.05);
//glUniformMatrix4fv(model_view, 1, GL_TRUE, mv);
//glActiveTexture(GL_TEXTURE1);
//glBindTexture(GL_TEXTURE_2D, texName[1]); //which texture do we want?
//glDrawArrays( GL_QUAD_STRIP, 0, VertexCount );
//mv = stack.pop();
stack.push(mv);
// texture unit 2 : specular earth
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_2D, texName[2]); //which texture do we want?
glDrawArrays( GL_QUAD_STRIP, 0, VertexCount );
// texture unit 4 : night earth
glActiveTexture(GL_TEXTURE4);
glBindTexture(GL_TEXTURE_2D, texName[4]); //which texture do we want?
glDrawArrays( GL_QUAD_STRIP, 0, VertexCount );
mv = stack.pop();
}
//////////////////////////////
// Display cloud
/////////////////////////////
if ( false )
{
glUseProgram(programAllFeatures);
model_view = glGetUniformLocation(programAllFeatures, "model_view");
projection = glGetUniformLocation(programAllFeatures, "projection");
//glUseProgram(programCloud);
//model_view = glGetUniformLocation(programCloud, "model_view");
//projection = glGetUniformLocation(programCloud, "projection");
glActiveTexture(GL_TEXTURE1);
mv = mv*Scale(2.01,2.01,2.01);
glUniformMatrix4fv(model_view, 1, GL_TRUE, mv);
glBindTexture(GL_TEXTURE_2D, texName[1]); //which texture do we want?
glDrawArrays( GL_QUAD_STRIP, 0, VertexCount );
}
glUseProgram(programAllFeatures);
glFlush();
/*start processing buffered OpenGL routines*/
glutSwapBuffers();
}
void EmitterShader::LoadShader(const char* vsh, const char* fsh)
{
program = build_program_from_assets(vsh, fsh);
// Attributes
this->a_pID = glGetAttribLocation(this->program, "a_pID");
this->a_pRadiusOffset = glGetAttribLocation(this->program, "a_pRadiusOffset");
this->a_pVelocityOffset = glGetAttribLocation(this->program, "a_pVelocityOffset");
this->a_pDecayOffset = glGetAttribLocation(this->program, "a_pDecayOffset");
this->a_pSizeOffset = glGetAttribLocation(this->program, "a_pSizeOffset");
this->a_pColorOffset = glGetAttribLocation(this->program, "a_pColorOffset");
// Uniforms
this->u_ProjectionMatrix = glGetUniformLocation(this->program, "u_ProjectionMatrix");
this->u_Gravity = glGetUniformLocation(this->program, "u_Gravity");
this->u_Time = glGetUniformLocation(this->program, "u_Time");
this->u_eRadius = glGetUniformLocation(this->program, "u_eRadius");
this->u_eVelocity = glGetUniformLocation(this->program, "u_eVelocity");
this->u_eDecay = glGetUniformLocation(this->program, "u_eDecay");
this->u_eSizeStart = glGetUniformLocation(this->program, "u_eSizeStart");
this->u_eSizeEnd = glGetUniformLocation(this->program, "u_eSizeEnd");
this->u_eColorStart = glGetUniformLocation(this->program, "u_eColorStart");
this->u_eColorEnd = glGetUniformLocation(this->program, "u_eColorEnd");
this->u_Texture = glGetUniformLocation(this->program, "u_Texture");
this->u_ePosition = glGetUniformLocation(this->program, "u_ePosition");
}
SceneManager::SceneManager(GLint width, GLint height)
#endif
{
Log << Function << endl;
// The projection matrix is represented by the perspective matrix given by glm, assign it to each one of the objects
GLfloat aspect = static_cast<GLfloat>(width) / static_cast<GLfloat>(height);
projectionMatrix = glm::perspective(
45.0f, // Field of view, is the amount of zoom. A wide angle is 90 and a narrow angle is 30
aspect, // Depends on the size of the window
0.1f, // Near clipping plane
500.0f // Far clipping plane
);
// Read the resources.txt file to obtain the valid configuration for the engine
string resourcesFileName = "resources.txt";
#if defined(__ANDROID__)
AAssetManager* mgr = AAssetManager_fromJava(*env, assetManager);
AAsset* pFile = AAssetManager_open(mgr, resourcesFileName.c_str(), AASSET_MODE_UNKNOWN);
if (!pFile)
#else
ifstream resourcesFile(resourcesFileName, ios::in);
if (!resourcesFile.is_open())
#endif
{
Log << Error << "Unable to read the resources file: " << resourcesFileName << endl;
terminate();
}
#if defined(__ANDROID__)
// Get the file size
size_t fileSize = AAsset_getLength(pFile);
// Read data from the file
char* pData = (char*)calloc(fileSize + 1, sizeof(char));
AAsset_read(pFile, pData, fileSize);
// fix the string to be zero-terminated
pData[fileSize] = 0;
// Copy the data to a stringstream
stringstream resourcesFile(pData);
AAsset_close(pFile);
free(pData);
#endif
Log << Debug << "Parsing the resources.txt file." << endl;
string line, name, vertex, fragment, object, texture, projection, modelview;
vector<string> cubeTextures{ NumCubeFaces };
GLuint size, bufferType;
vec3 pos, scl, rot;
char token;
bool finished = true;
while (getline(resourcesFile, line))
{
stringstream ssLine(line);
// Ignore empty lines on the configuration file
if(line.size() == 0)
continue;
ssLine >> token;
switch (token)
{
// If the line is a comment get the next token
case '#':
continue;
// Start of object definition
case '.':
// Create a new scene object
Log << Debug << "Starting an object definition." << endl;
sceneobjects.push_back(make_unique<SceneObject>());
finished = false;
break;
// End of an object definition
case '-':
Log << Debug << "End an object definition." << endl;
finished = true;
break;
// Attributes used on the shaders
case 'A':
ssLine >> name >> size >> bufferType;
Log << Debug << "Adding the attribute: " << name << endl;
attributes.push_back(make_unique<Variable>(name, size, (BufferType)bufferType));
break;
// Uniforms used on the shaders
case 'U':
ssLine >> name;
Log << Debug << "Adding the uniform: " << name << endl;
uniforms.push_back(make_unique<Variable>(name));
break;
// Shaders creation
case 'S':
ssLine >> vertex >> fragment;
Log << Debug << "Creating the shaders." << endl;
#if defined (__ANDROID__)
sceneobjects.back()->SetShader(make_shared<Shader>(&mgr, vertex, fragment, attributes, uniforms));
#else
sceneobjects.back()->SetShader(make_shared<Shader>(vertex, fragment, attributes, uniforms));
#endif
break;
// Object definitions
case 'O':
ssLine >> object;
Log << Debug << "Loading a model." << endl;
#if defined (__ANDROID__)
sceneobjects.back()->SetMesh(make_unique<Mesh>(&mgr, object, sceneobjects.back()->GetShader()));
#else
sceneobjects.back()->SetMesh(make_unique<Mesh>(object, sceneobjects.back()->GetShader()));
#endif
break;
// Textures
case 'T':
ssLine >> texture;
Log << Debug << "Loading a texture." << endl;
#if defined(__ANDROID__)
sceneobjects.back()->SetTexture(make_unique<Texture>(&mgr, texture, sceneobjects.back()->GetShader()));
#else
sceneobjects.back()->SetTexture(make_unique<Texture>(texture, sceneobjects.back()->GetShader()));
#endif
break;
// Initial coordinates
case 'C':
Log << Debug << "Adding coordinates to the object." << endl;
ssLine >> pos.x >> pos.y >> pos.z >> scl.x >> scl.y >> scl.z >> rot.x >> rot.y >> rot.z >> angle;
sceneobjects.back()->SetCoordinates(pos, scl, rot, angle);
break;
// Projection matrix
case 'P':
ssLine >> projection;
break;
// Modelview matrix
case 'M':
ssLine >> modelview;
break;
// Skybox
case 'B':
Log << Debug << "Adding a skybox." << endl;
ssLine >> cubeTextures[0] >> cubeTextures[1] >> cubeTextures[2] >> cubeTextures[3] >> cubeTextures[4] >> cubeTextures[5];
sceneobjects.back()->SetSkymap();
#if defined(__ANDROID__)
sceneobjects.back()->SetMesh(make_unique<Mesh>(&mgr, string(""), sceneobjects.back()->GetShader()));
sceneobjects.back()->SetTexture(make_unique<Texture>(&mgr, cubeTextures, sceneobjects.back()->GetShader()));
#else
sceneobjects.back()->SetMesh(make_unique<Mesh>(string(""), sceneobjects.back()->GetShader()));
sceneobjects.back()->SetTexture(make_unique<Texture>(cubeTextures, sceneobjects.back()->GetShader()));
#endif
break;
// Terrain Heightmap
case 'H':
Log << Debug << "Loading the terrain." << endl;
ssLine >> texture >> object;
#if defined(__ANDROID__)
sceneobjects.back()->SetTexture(make_unique<Texture>(&mgr, texture, sceneobjects.back()->GetShader()));
sceneobjects.back()->SetMesh(make_unique<Mesh>(&mgr, object, sceneobjects.back()->GetShader(), &sceneobjects.back()->GetTexture()));
#else
sceneobjects.back()->SetTexture(make_unique<Texture>(texture, sceneobjects.back()->GetShader()));
sceneobjects.back()->SetMesh(make_unique<Mesh>(object, sceneobjects.back()->GetShader(), &sceneobjects.back()->GetTexture()));
#endif
break;
default:
continue;
}
// Check if the definition of an object is complete or if more lines are needed
if (finished)
{
// Get the projection and modelview uniforms
if (!projection.empty())
{
sceneobjects.back()->SetProjectionUni(glGetUniformLocation(sceneobjects.back()->GetShader()->getProgramObject(), "Projection"));
projection.clear();
}
if (!modelview.empty())
{
sceneobjects.back()->SetModelviewUni(glGetUniformLocation(sceneobjects.back()->GetShader()->getProgramObject(), "Modelview"));
modelview.clear();
}
// Clear the attributes and uniforms in order to load the next object
attributes.clear();
uniforms.clear();
}
}
#if !defined(__ANDROID__)
// Close de the resources file
resourcesFile.close();
#endif
// Set the initial position of the camera
camera = vec3(2.5f, -1.0f, -5.0f);
// Initial value of the rotation angle
angle = 0.0f;
}
LinkedShader::LinkedShader(Shader *vs, Shader *fs, u32 vertType, bool useHWTransform, LinkedShader *previous)
: useHWTransform_(useHWTransform), program(0), dirtyUniforms(0) {
program = glCreateProgram();
glAttachShader(program, vs->shader);
glAttachShader(program, fs->shader);
// Bind attribute locations to fixed locations so that they're
// the same in all shaders. We use this later to minimize the calls to
// glEnableVertexAttribArray and glDisableVertexAttribArray.
glBindAttribLocation(program, ATTR_POSITION, "position");
glBindAttribLocation(program, ATTR_TEXCOORD, "texcoord");
glBindAttribLocation(program, ATTR_NORMAL, "normal");
glBindAttribLocation(program, ATTR_W1, "w1");
glBindAttribLocation(program, ATTR_W2, "w2");
glBindAttribLocation(program, ATTR_COLOR0, "color0");
glBindAttribLocation(program, ATTR_COLOR1, "color1");
#ifndef USING_GLES2
if (gl_extensions.ARB_blend_func_extended) {
// Dual source alpha
glBindFragDataLocationIndexed(program, 0, 0, "fragColor0");
glBindFragDataLocationIndexed(program, 0, 1, "fragColor1");
} else if (gl_extensions.VersionGEThan(3, 3, 0)) {
glBindFragDataLocation(program, 0, "fragColor0");
}
#endif
glLinkProgram(program);
// Detaching shaders is annoying when debugging with gDebugger
// so let's not do that on Windows.
#ifdef USING_GLES
glDetachShader(program, vs->shader);
glDetachShader(program, fs->shader);
#endif
GLint linkStatus = GL_FALSE;
glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
if (linkStatus != GL_TRUE) {
GLint bufLength = 0;
glGetProgramiv(program, GL_INFO_LOG_LENGTH, &bufLength);
if (bufLength) {
char* buf = new char[bufLength];
glGetProgramInfoLog(program, bufLength, NULL, buf);
#ifdef ANDROID
ELOG("Could not link program:\n %s", buf);
#endif
ERROR_LOG(G3D, "Could not link program:\n %s", buf);
ERROR_LOG(G3D, "VS:\n%s", vs->source().c_str());
ERROR_LOG(G3D, "FS:\n%s", fs->source().c_str());
Reporting::ReportMessage("Error in shader program link: info: %s / fs: %s / vs: %s", buf, fs->source().c_str(), vs->source().c_str());
#ifdef SHADERLOG
OutputDebugStringUTF8(buf);
OutputDebugStringUTF8(vs->source().c_str());
OutputDebugStringUTF8(fs->source().c_str());
#endif
delete [] buf; // we're dead!
}
// Prevent a buffer overflow.
numBones = 0;
return;
}
INFO_LOG(G3D, "Linked shader: vs %i fs %i", (int)vs->shader, (int)fs->shader);
u_tex = glGetUniformLocation(program, "tex");
u_proj = glGetUniformLocation(program, "u_proj");
u_proj_through = glGetUniformLocation(program, "u_proj_through");
u_texenv = glGetUniformLocation(program, "u_texenv");
u_fogcolor = glGetUniformLocation(program, "u_fogcolor");
u_fogcoef = glGetUniformLocation(program, "u_fogcoef");
u_alphacolorref = glGetUniformLocation(program, "u_alphacolorref");
u_colormask = glGetUniformLocation(program, "u_colormask");
u_stencilReplaceValue = glGetUniformLocation(program, "u_stencilReplaceValue");
// Transform
u_view = glGetUniformLocation(program, "u_view");
u_world = glGetUniformLocation(program, "u_world");
u_texmtx = glGetUniformLocation(program, "u_texmtx");
if (vertTypeGetWeightMask(vertType) != GE_VTYPE_WEIGHT_NONE)
numBones = TranslateNumBones(vertTypeGetNumBoneWeights(vertType));
else
numBones = 0;
#ifdef USE_BONE_ARRAY
u_bone = glGetUniformLocation(program, "u_bone");
#else
for (int i = 0; i < 8; i++) {
char name[10];
sprintf(name, "u_bone%i", i);
u_bone[i] = glGetUniformLocation(program, name);
}
#endif
// Lighting, texturing
u_ambient = glGetUniformLocation(program, "u_ambient");
u_matambientalpha = glGetUniformLocation(program, "u_matambientalpha");
u_matdiffuse = glGetUniformLocation(program, "u_matdiffuse");
u_matspecular = glGetUniformLocation(program, "u_matspecular");
u_matemissive = glGetUniformLocation(program, "u_matemissive");
u_uvscaleoffset = glGetUniformLocation(program, "u_uvscaleoffset");
for (int i = 0; i < 4; i++) {
char temp[64];
sprintf(temp, "u_lightpos%i", i);
u_lightpos[i] = glGetUniformLocation(program, temp);
sprintf(temp, "u_lightdir%i", i);
u_lightdir[i] = glGetUniformLocation(program, temp);
sprintf(temp, "u_lightatt%i", i);
u_lightatt[i] = glGetUniformLocation(program, temp);
sprintf(temp, "u_lightangle%i", i);
u_lightangle[i] = glGetUniformLocation(program, temp);
sprintf(temp, "u_lightspotCoef%i", i);
u_lightspotCoef[i] = glGetUniformLocation(program, temp);
sprintf(temp, "u_lightambient%i", i);
u_lightambient[i] = glGetUniformLocation(program, temp);
sprintf(temp, "u_lightdiffuse%i", i);
u_lightdiffuse[i] = glGetUniformLocation(program, temp);
sprintf(temp, "u_lightspecular%i", i);
u_lightspecular[i] = glGetUniformLocation(program, temp);
}
attrMask = 0;
if (-1 != glGetAttribLocation(program, "position")) attrMask |= 1 << ATTR_POSITION;
if (-1 != glGetAttribLocation(program, "texcoord")) attrMask |= 1 << ATTR_TEXCOORD;
if (-1 != glGetAttribLocation(program, "normal")) attrMask |= 1 << ATTR_NORMAL;
if (-1 != glGetAttribLocation(program, "w1")) attrMask |= 1 << ATTR_W1;
if (-1 != glGetAttribLocation(program, "w2")) attrMask |= 1 << ATTR_W2;
if (-1 != glGetAttribLocation(program, "color0")) attrMask |= 1 << ATTR_COLOR0;
if (-1 != glGetAttribLocation(program, "color1")) attrMask |= 1 << ATTR_COLOR1;
availableUniforms = 0;
if (u_proj != -1) availableUniforms |= DIRTY_PROJMATRIX;
if (u_proj_through != -1) availableUniforms |= DIRTY_PROJTHROUGHMATRIX;
if (u_texenv != -1) availableUniforms |= DIRTY_TEXENV;
if (u_alphacolorref != -1) availableUniforms |= DIRTY_ALPHACOLORREF;
if (u_colormask != -1) availableUniforms |= DIRTY_COLORMASK;
if (u_fogcolor != -1) availableUniforms |= DIRTY_FOGCOLOR;
if (u_fogcoef != -1) availableUniforms |= DIRTY_FOGCOEF;
if (u_texenv != -1) availableUniforms |= DIRTY_TEXENV;
if (u_uvscaleoffset != -1) availableUniforms |= DIRTY_UVSCALEOFFSET;
if (u_world != -1) availableUniforms |= DIRTY_WORLDMATRIX;
if (u_view != -1) availableUniforms |= DIRTY_VIEWMATRIX;
if (u_texmtx != -1) availableUniforms |= DIRTY_TEXMATRIX;
if (u_stencilReplaceValue != -1) availableUniforms |= DIRTY_STENCILREPLACEVALUE;
// Looping up to numBones lets us avoid checking u_bone[i]
for (int i = 0; i < numBones; i++) {
if (u_bone[i] != -1)
availableUniforms |= DIRTY_BONEMATRIX0 << i;
}
if (u_ambient != -1) availableUniforms |= DIRTY_AMBIENT;
if (u_matambientalpha != -1) availableUniforms |= DIRTY_MATAMBIENTALPHA;
if (u_matdiffuse != -1) availableUniforms |= DIRTY_MATDIFFUSE;
if (u_matemissive != -1) availableUniforms |= DIRTY_MATEMISSIVE;
if (u_matspecular != -1) availableUniforms |= DIRTY_MATSPECULAR;
for (int i = 0; i < 4; i++) {
if (u_lightdir[i] != -1 ||
u_lightspecular[i] != -1 ||
u_lightpos[i] != -1)
availableUniforms |= DIRTY_LIGHT0 << i;
}
glUseProgram(program);
// Default uniform values
glUniform1i(u_tex, 0);
// The rest, use the "dirty" mechanism.
dirtyUniforms = DIRTY_ALL;
use(vertType, previous);
}
void init () {
printf("init()\n");
glClearColor(.3f, .3f, .3f, 1.f);
g_context.vert_id = load_shader(
GL_VERTEX_SHADER,
"attribute vec4 a_position; \n"
"attribute vec4 a_color; \n"
"uniform float u_time; \n"
"varying vec4 v_color; \n"
"void main() \n"
"{ \n"
" float sz = sin(u_time); \n"
" float cz = cos(u_time); \n"
" mat4 rot = mat4( \n"
" cz, -sz, 0, 0, \n"
" sz, cz, 0, 0, \n"
" 0, 0, 1, 0, \n"
" 0, 0, 0, 1 \n"
" ); \n"
" gl_Position = a_position * rot; \n"
" v_color = a_color; \n"
"} \n"
);
printf("- vertex shader loaded\n");
g_context.frag_id = load_shader(
GL_FRAGMENT_SHADER,
"precision mediump float; \n"
"varying vec4 v_color; \n"
"void main() \n"
"{ \n"
" gl_FragColor = v_color; \n"
"} \n"
);
printf("- fragment shader loaded\n");
g_context.prog_id = glCreateProgram();
assert(g_context.prog_id);
glAttachShader(g_context.prog_id, g_context.vert_id);
glAttachShader(g_context.prog_id, g_context.frag_id);
glBindAttribLocation(g_context.prog_id, Context::Position_loc, "a_position");
glBindAttribLocation(g_context.prog_id, Context::Color_loc, "a_color");
glLinkProgram(g_context.prog_id);
GLint linked = 0;
glGetProgramiv(g_context.prog_id, GL_LINK_STATUS, &linked);
assert(linked);
g_context.u_time_loc = glGetUniformLocation(g_context.prog_id, "u_time");
assert(g_context.u_time_loc >= 0);
glUseProgram(g_context.prog_id);
printf("- shader program linked & bound\n");
struct Vertex { float x, y, z; unsigned char r, g, b, a; };
const Vertex vtcs[3] = {
{ 0.f, .5f, 0.f, 255, 0, 0, 255 },
{ -.5f, -.5f, 0.f, 0, 255, 0, 255 },
{ .5f, -.5f, 0.f, 0, 0, 255, 255 }
};
glGenBuffers(1, &g_context.geom_id);
assert(g_context.geom_id);
glBindBuffer(GL_ARRAY_BUFFER, g_context.geom_id);
glBufferData(GL_ARRAY_BUFFER, sizeof(vtcs), vtcs, GL_STATIC_DRAW);
glVertexAttribPointer(Context::Position_loc, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), offset(0));
glEnableVertexAttribArray(Context::Position_loc);
glVertexAttribPointer(Context::Color_loc, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(Vertex), offset(3 * sizeof(float)));
glEnableVertexAttribArray(Context::Color_loc);
printf("- geometry created & bound\n");
}
int main(int argc, char** argv) {
// Standard stuff...
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH);
glutInitWindowSize(1080, 600);
glutCreateWindow("Lighted Cube");
glutReshapeFunc(changeViewport);
glutKeyboardFunc(keyboardFunc);
glutDisplayFunc(render);
glewInit();
initMatrices(); // New <========================================
// Make a shader
char* vertexShaderSourceCode = readFile("vertexShader.vsh");
char* fragmentShaderSourceCode = readFile("fragmentShader.fsh");
GLuint vertShaderID = makeVertexShader(vertexShaderSourceCode);
GLuint fragShaderID = makeFragmentShader(fragmentShaderSourceCode);
shaderProgramID = makeShaderProgram(vertShaderID, fragShaderID);
// Create the "remember all"
glGenVertexArrays(1, &vao);
glBindVertexArray(vao);
glGenBuffers(1, &vbo);
glBindBuffer(GL_ARRAY_BUFFER, vbo);
// Create the buffer, but don't load anything yet
//glBufferData(GL_ARRAY_BUFFER, 7*NUM_VERTICES*sizeof(GLfloat), NULL, GL_STATIC_DRAW);
glBufferData(GL_ARRAY_BUFFER, 6 * NUM_VERTICES*sizeof(GLfloat), NULL, GL_STATIC_DRAW); // NEW! - we're only loading vertices and normals (6 elements, not 7)
// Load the vertex points
glBufferSubData(GL_ARRAY_BUFFER, 0, 3 * NUM_VERTICES*sizeof(GLfloat), vertices);
// Load the colors right after that
//glBufferSubData(GL_ARRAY_BUFFER, 3*NUM_VERTICES*sizeof(GLfloat),4*NUM_VERTICES*sizeof(GLfloat), colors);
glBufferSubData(GL_ARRAY_BUFFER, 3 * NUM_VERTICES*sizeof(GLfloat), 3 * NUM_VERTICES*sizeof(GLfloat), normals);
#ifdef USING_INDEX_BUFFER
glGenBuffers(1, &indexBufferID);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBufferID);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, NUM_INDICES*sizeof(GLuint), indices, GL_STATIC_DRAW);
#endif
// Find the position of the variables in the shader
positionID = glGetAttribLocation(shaderProgramID, "s_vPosition");
normalID = glGetAttribLocation(shaderProgramID, "s_vNormal"); // NEW
lightID1 = glGetUniformLocation(shaderProgramID, "vLight1"); // NEW
lightID2 = glGetUniformLocation(shaderProgramID, "vLight2"); // NEW
// ============ New! glUniformLocation is how you pull IDs for uniform variables===============
perspectiveMatrixID = glGetUniformLocation(shaderProgramID, "mP");
viewMatrixID = glGetUniformLocation(shaderProgramID, "mV");
modelMatrixID = glGetUniformLocation(shaderProgramID, "mM");
allRotsMatrixID = glGetUniformLocation(shaderProgramID, "mRotations"); // NEW
//=============================================================================================
glVertexAttribPointer(positionID, 3, GL_FLOAT, GL_FALSE, 0, 0);
glVertexAttribPointer(normalID, 3, GL_FLOAT, GL_FALSE, 0, BUFFER_OFFSET(sizeof(vertices)));
glUseProgram(shaderProgramID);
glEnableVertexAttribArray(positionID);
glEnableVertexAttribArray(normalID); // NEW
glEnable(GL_CULL_FACE); // NEW! - we're doing real 3D now
glCullFace(GL_BACK); // Other options? GL_FRONT and GL_FRONT_AND_BACK
glEnable(GL_DEPTH_TEST); // Make sure the depth buffer is on. As you draw a pixel, update the screen only if it's closer than previous ones
glutMainLoop();
return 0;
}
tvint tv_material_get_uniform(tv_material *material, tvchar *name)
{
/* TODO: obviously this is a horrible hack.
* this function shouldn't exist anyway */
return glGetUniformLocation(material->passes[0]->program, name);
}
/**
* Function for initialization.
*/
GLUSboolean init(GLUSvoid)
{
// Matrix for the model
GLfloat model[16];
GLUSshape cube;
GLUStgaimage image;
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
// Load the source of the vertex shader.
glusLoadTextFile("../Example05/Vertex.vs", &vertexSource);
// Load the source of the fragment shader.
glusLoadTextFile("../Example05/Fragment.fs", &fragmentSource);
// Build and ...
glusBuildProgram(&g_program, (const GLUSchar**)&vertexSource.text, 0, (const GLUSchar**)&fragmentSource.text);
// Destroy the text resource
glusDestroyTextFile(&vertexSource);
// Destroy the text resource
glusDestroyTextFile(&fragmentSource);
// ToDo:
glGenVertexArrays(1, &g_vao);
// ToDo:
glBindVertexArray(g_vao);
glusCreateCubef(&cube, 0.5f);
numberIndices = cube.numberIndices;
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_projectionLocation = glGetUniformLocation(g_program.program, "projectionMatrix");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_modelViewLocation = glGetUniformLocation(g_program.program, "modelViewMatrix");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetUniformLocation.xml
g_textureLocation = glGetUniformLocation(g_program.program, "firstTexture");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetAttribLocation.xml
g_vertexLocation = glGetAttribLocation(g_program.program, "vertex");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetAttribLocation.xml
g_normalLocation = glGetAttribLocation(g_program.program, "normal");
// http://www.opengl.org/sdk/docs/man/xhtml/glGetAttribLocation.xml
g_texCoordLocation = glGetAttribLocation(g_program.program, "texCoord");
// ToDo:
glBindFragDataLocation(g_program.program, 0, "fragColor");
// http://www.opengl.org/sdk/docs/man/xhtml/glGenBuffers.xml
glGenBuffers(1, &g_vertices);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_vertices);
// http://www.opengl.org/sdk/docs/man/xhtml/glBufferData.xml
glBufferData(GL_ARRAY_BUFFER, cube.numberVertices*4*sizeof(GLfloat), (GLfloat*)cube.vertices, GL_STATIC_DRAW);
// http://www.opengl.org/sdk/docs/man/xhtml/glGenBuffers.xml
glGenBuffers(1, &g_normals);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_normals);
// http://www.opengl.org/sdk/docs/man/xhtml/glBufferData.xml
glBufferData(GL_ARRAY_BUFFER, cube.numberVertices*3*sizeof(GLfloat), (GLfloat*)cube.normals, GL_STATIC_DRAW);
// http://www.opengl.org/sdk/docs/man/xhtml/glGenBuffers.xml
glGenBuffers(1, &g_texCoords);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_texCoords);
// http://www.opengl.org/sdk/docs/man/xhtml/glBufferData.xml
glBufferData(GL_ARRAY_BUFFER, cube.numberVertices*2*sizeof(GLfloat), (GLfloat*)cube.texCoords, GL_STATIC_DRAW);
// http://www.opengl.org/sdk/docs/man/xhtml/glGenBuffers.xml
glGenBuffers(1, &g_indices);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indices);
// http://www.opengl.org/sdk/docs/man/xhtml/glBufferData.xml
glBufferData(GL_ELEMENT_ARRAY_BUFFER, cube.numberIndices*sizeof(GLuint), (GLuint*)cube.indices, GL_STATIC_DRAW);
glusDestroyShapef(&cube);
glusLoadTgaImage("crate.tga", &image);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/gentextures.html
glGenTextures(1, &g_texture);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/bindtexture.html
glBindTexture(GL_TEXTURE_2D, g_texture);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/teximage2d.html
glTexImage2D(GL_TEXTURE_2D, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusDestroyTgaImage(&image);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/texparameter.html
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
// http://www.opengl.org/sdk/docs/man/xhtml/glUseProgram.xml
glUseProgram(g_program.program);
// Calculate the model matrix ...
glusLoadIdentityf(model);
glusRotateRzRyRxf(model, 30.0f, 30.0f, 0.0f);
// ... and the view matrix ...
glusLookAtf(g_modelView, 0.0f, 0.0f, 5.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);
// ... to get the final model view matrix
glusMultMatrixf(g_modelView, g_modelView, model);
// http://www.opengl.org/sdk/docs/man/xhtml/glUniform.xml
glUniformMatrix4fv(g_modelViewLocation, 1, GL_FALSE, g_modelView);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_vertices);
// http://www.opengl.org/sdk/docs/man/xhtml/glVertexAttribPointer.xml
glVertexAttribPointer(g_vertexLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
// http://www.opengl.org/sdk/docs/man/xhtml/glEnableVertexAttribArray.xml
glEnableVertexAttribArray(g_vertexLocation);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_normals);
// http://www.opengl.org/sdk/docs/man/xhtml/glVertexAttribPointer.xml
glVertexAttribPointer(g_normalLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
// http://www.opengl.org/sdk/docs/man/xhtml/glEnableVertexAttribArray.xml
glEnableVertexAttribArray(g_normalLocation);
// http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
glBindBuffer(GL_ARRAY_BUFFER, g_texCoords);
// http://www.opengl.org/sdk/docs/man/xhtml/glVertexAttribPointer.xml
glVertexAttribPointer(g_texCoordLocation, 2, GL_FLOAT, GL_FALSE, 0, 0);
// http://www.opengl.org/sdk/docs/man/xhtml/glEnableVertexAttribArray.xml
glEnableVertexAttribArray(g_texCoordLocation);
// http://www.opengl.org/sdk/docs/man/xhtml/glUniform.xml
glUniform1i(g_textureLocation, 0);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/clearcolor.html
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
// http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/cleardepth.html
glClearDepth(1.0f);
//http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/enable.html
glEnable(GL_DEPTH_TEST);
//http://www.opengl.org/documentation/specs/man_pages/hardcopy/GL/html/gl/enable.html
glEnable(GL_CULL_FACE);
return GLUS_TRUE;
}
void draw_windmill(windmill_t* w, float dt)
{
glUseProgram(programs[WINDMILL_PROGRAM]);
// Send in additional params
glUniformMatrix4fv(glGetUniformLocation(programs[WINDMILL_PROGRAM], "projectionMatrix"), 1, GL_TRUE, projectionMatrix);
glUniformMatrix4fv(glGetUniformLocation(programs[WINDMILL_PROGRAM], "camMatrix"), 1, GL_TRUE, camMatrix);
glUniformMatrix4fv(glGetUniformLocation(programs[WINDMILL_PROGRAM], "lightSourcesColors"), 1, GL_FALSE, lightSourcesColors);
glUniformMatrix4fv(glGetUniformLocation(programs[WINDMILL_PROGRAM], "lightSourcesDirections"), 1, GL_FALSE, lightSourcesDirections);
float camera_position[3]; camera_position[0] = position.x; camera_position[1] = position.y; camera_position[2] = position.z;
glUniform3fv(glGetUniformLocation(programs[WINDMILL_PROGRAM], "camera_position"), 1, camera_position);
w->bladeangle += dt*windspeed/3;
Rz(w->bladeangle, w->bladerotationMatrix);
GLfloat bladeBaseMatrix[16];
Mult(w->windmillMDLMatrix[WINDMILL_BASE], w->bladecenterMatrix, work[0]);
Mult(work[0], w->bladerotationMatrix, bladeBaseMatrix);
{
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, billboards[WOOD_TEXTURE]);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, billboards[WOOD_TEXTURE]);
glUniform1i(glGetUniformLocation(programs[WINDMILL_PROGRAM], "firstTexUnit"), 0);
glUniform1i(glGetUniformLocation(programs[WINDMILL_PROGRAM], "secondTexUnit"), 1);
glUniformMatrix4fv(glGetUniformLocation(programs[WINDMILL_PROGRAM], "baseMatrix"), 1, GL_TRUE, bladeBaseMatrix);
int i = 0;
for(i = 0; i < 4; ++i) {
glUniformMatrix4fv(glGetUniformLocation(programs[WINDMILL_PROGRAM], "mdlMatrix"), 1, GL_TRUE, w->bladeMDLMatrix[i]);
DrawModel(w->blades[i]);
}
}
{
glUniformMatrix4fv(glGetUniformLocation(programs[WINDMILL_PROGRAM], "baseMatrix"), 1, GL_TRUE, w->windmillMDLMatrix[WINDMILL_BASE]);
int i = 0;
for(i = 1; i < 3; ++i) {
glUniformMatrix4fv(glGetUniformLocation(programs[WINDMILL_PROGRAM], "mdlMatrix"), 1, GL_TRUE, w->windmillMDLMatrix[i]);
DrawModel(w->windmill[i]);
}
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, billboards[BRICK_TEXTURE]);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, billboards[BRICK_CRACK_TEXTURE]);
glUniformMatrix4fv(glGetUniformLocation(programs[WINDMILL_PROGRAM], "mdlMatrix"), 1, GL_TRUE, w->windmillMDLMatrix[WALLS]);
DrawModel(w->windmill[WALLS]);
}
//printError("display windmill");
}
int main() {
int width = 640;
int height = 480;
if(glfwInit() == GL_FALSE) {
std::cerr << "failed to init GLFW" << std::endl;
return 1;
}
// select opengl version
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
// create a window
GLFWwindow *window;
if((window = glfwCreateWindow(width, height, "03texture", 0, 0)) == 0) {
std::cerr << "failed to open window" << std::endl;
glfwTerminate();
return 1;
}
glfwMakeContextCurrent(window);
if(glxwInit()) {
std::cerr << "failed to init GL3W" << std::endl;
glfwDestroyWindow(window);
glfwTerminate();
return 1;
}
// shader source code
std::string vertex_source =
"#version 330\n"
"layout(location = 0) in vec4 vposition;\n"
"layout(location = 1) in vec2 vtexcoord;\n"
"out vec2 ftexcoord;\n"
"void main() {\n"
" ftexcoord = vtexcoord;\n"
" gl_Position = vposition;\n"
"}\n";
std::string fragment_source =
"#version 330\n"
"uniform sampler2D tex;\n" // texture uniform
"in vec2 ftexcoord;\n"
"layout(location = 0) out vec4 FragColor;\n"
"void main() {\n"
" FragColor = texture(tex, ftexcoord);\n"
"}\n";
// program and shader handles
GLuint shader_program, vertex_shader, fragment_shader;
// we need these to properly pass the strings
const char *source;
int length;
// create and compiler vertex shader
vertex_shader = glCreateShader(GL_VERTEX_SHADER);
source = vertex_source.c_str();
length = vertex_source.size();
glShaderSource(vertex_shader, 1, &source, &length);
glCompileShader(vertex_shader);
if(!check_shader_compile_status(vertex_shader)) {
glfwDestroyWindow(window);
glfwTerminate();
return 1;
}
// create and compiler fragment shader
fragment_shader = glCreateShader(GL_FRAGMENT_SHADER);
source = fragment_source.c_str();
length = fragment_source.size();
glShaderSource(fragment_shader, 1, &source, &length);
glCompileShader(fragment_shader);
if(!check_shader_compile_status(fragment_shader)) {
glfwDestroyWindow(window);
glfwTerminate();
return 1;
}
// create program
shader_program = glCreateProgram();
// attach shaders
glAttachShader(shader_program, vertex_shader);
glAttachShader(shader_program, fragment_shader);
// link the program and check for errors
glLinkProgram(shader_program);
check_program_link_status(shader_program);
// get texture uniform location
GLint texture_location = glGetUniformLocation(shader_program, "tex");
// vao and vbo handle
GLuint vao, vbo, ibo;
// generate and bind the vao
glGenVertexArrays(1, &vao);
glBindVertexArray(vao);
// generate and bind the vertex buffer object
glGenBuffers(1, &vbo);
glBindBuffer(GL_ARRAY_BUFFER, vbo);
// data for a fullscreen quad (this time with texture coords)
GLfloat vertexData[] = {
// X Y Z U V
1.0f, 1.0f, 0.0f, 1.0f, 1.0f, // vertex 0
-1.0f, 1.0f, 0.0f, 0.0f, 1.0f, // vertex 1
1.0f,-1.0f, 0.0f, 1.0f, 0.0f, // vertex 2
-1.0f,-1.0f, 0.0f, 0.0f, 0.0f, // vertex 3
}; // 4 vertices with 5 components (floats) each
// fill with data
glBufferData(GL_ARRAY_BUFFER, sizeof(GLfloat)*4*5, vertexData, GL_STATIC_DRAW);
// set up generic attrib pointers
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5*sizeof(GLfloat), (char*)0 + 0*sizeof(GLfloat));
glEnableVertexAttribArray(1);
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 5*sizeof(GLfloat), (char*)0 + 3*sizeof(GLfloat));
// generate and bind the index buffer object
glGenBuffers(1, &ibo);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ibo);
GLuint indexData[] = {
0,1,2, // first triangle
2,1,3, // second triangle
};
// fill with data
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(GLuint)*2*3, indexData, GL_STATIC_DRAW);
// "unbind" vao
glBindVertexArray(0);
// texture handle
GLuint texture;
// generate texture
glGenTextures(1, &texture);
// bind the texture
glBindTexture(GL_TEXTURE_2D, texture);
// create some image data
std::vector<GLubyte> image(4*width*height);
for(int j = 0;j<height;++j) {
for(int i = 0;i<width;++i) {
size_t index = j*width + i;
image[4*index + 0] = 0xFF*(j/10%2)*(i/10%2); // R
image[4*index + 1] = 0xFF*(j/13%2)*(i/13%2); // G
image[4*index + 2] = 0xFF*(j/17%2)*(i/17%2); // B
image[4*index + 3] = 0xFF; // A
}
}
// set texture parameters
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
// set texture content
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, &image[0]);
while(!glfwWindowShouldClose(window)) {
glfwPollEvents();
// clear first
glClear(GL_COLOR_BUFFER_BIT);
// use the shader program
glUseProgram(shader_program);
// bind texture to texture unit 0
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, texture);
// set texture uniform
glUniform1i(texture_location, 0);
// bind the vao
glBindVertexArray(vao);
// draw
glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
// check for errors
GLenum error = glGetError();
if(error != GL_NO_ERROR) {
std::cerr << error << std::endl;
break;
}
// finally swap buffers
glfwSwapBuffers(window);
}
// delete the created objects
glDeleteTextures(1, &texture);
glDeleteVertexArrays(1, &vao);
glDeleteBuffers(1, &vbo);
glDeleteBuffers(1, &ibo);
glDetachShader(shader_program, vertex_shader);
glDetachShader(shader_program, fragment_shader);
glDeleteShader(vertex_shader);
glDeleteShader(fragment_shader);
glDeleteProgram(shader_program);
glfwDestroyWindow(window);
glfwTerminate();
return 0;
}
void CurrentApp::DefferedDraw(float dt)
{
IconShader* IS = IconShader::GetInstance();
// G-Pass: render out the albedo, position and normal
glEnable(GL_DEPTH_TEST);
glDisable(GL_BLEND);
m_gPassTarget->SetAsActiveRenderTarget();
glClearColor(0, 0, 0, 0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
m_program = IS->UseProgram("GBuffer");
// bind camera transforms
int loc = glGetUniformLocation(m_program, "ProjectionView");
glUniformMatrix4fv(loc, 1, GL_FALSE, &(m_camera->GetProjectionView()[0][0]));
loc = glGetUniformLocation(m_program, "View");
glUniformMatrix4fv(loc, 1, GL_FALSE, &(m_camera->GetView()[0][0]));
m_snowEmitter->draw(CurrentTime(), m_camera->GetTransform(), m_camera->GetProjectionView());
//m_terrain->Render(m_camera->GetProjectionView());
// Light Pass: render lights as geometry, sampling position and
// normals disable depth testing and enable additive blending
m_lightPassTarget->SetAsActiveRenderTarget();
glClear(GL_COLOR_BUFFER_BIT);
glDisable(GL_DEPTH_TEST);
glEnable(GL_BLEND);
glBlendFunc(GL_ONE, GL_ONE);
m_program = IS->UseProgram("Light");
loc = glGetUniformLocation(m_program, "positionTexture");
glUniform1i(loc, 0);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, m_lightPassTarget->GetRenderTexture(0));
//loc = glGetUniformLocation(m_program, "normalTexture");
//glUniform1i(loc, 1);
//glActiveTexture(GL_TEXTURE1);
//glBindTexture(GL_TEXTURE_2D, m_normalTexture);
//drawDirectionalLight(m_lightDir, glm::vec3(1, 1, 1));
glDisable(GL_BLEND);
glEnable(GL_DEPTH_TEST);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, 0);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, 0);
// Composite Pass: render a quad and combine albedo and light
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
m_program = IS->UseProgram("Composite");
loc = glGetUniformLocation(m_program, "albedoTexture");
glUniform1i(loc, 0);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, m_gPassTarget->GetRenderTexture(0));
loc = glGetUniformLocation(m_program, "lightTexture");
glUniform1i(loc, 1);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, m_lightPassTarget->GetRenderTexture(0));
glBindVertexArray(m_fullscreenQuad);
glDrawArrays(GL_TRIANGLES, 0, 6);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, 0);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, 0);
}
// The MAIN function, from here we start our application and run our Game loop
int main()
{
// Init GLFW
glfwInit();
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);
GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", nullptr, nullptr); // Windowed
glfwMakeContextCurrent(window);
// Set the required callback functions
glfwSetKeyCallback(window, key_callback);
glfwSetCursorPosCallback(window, mouse_callback);
glfwSetScrollCallback(window, scroll_callback);
// Options
glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
// Initialize GLEW to setup the OpenGL Function pointers
glewExperimental = GL_TRUE;
glewInit();
// Define the viewport dimensions
glViewport(0, 0, SCR_WIDTH, SCR_HEIGHT);
// Setup some OpenGL options
glEnable(GL_DEPTH_TEST);
// Setup and compile our shaders
Shader shader("parallax_mapping.vs", "parallax_mapping.frag");
// Load textures
GLuint diffuseMap = loadTexture("../../../resources/textures/bricks2.jpg");
GLuint normalMap = loadTexture("../../../resources/textures/bricks2_normal.jpg");
GLuint heightMap = loadTexture("../../../resources/textures/bricks2_disp.jpg");
//GLuint diffuseMap = loadTexture("../../../resources/textures/wood.png");
//GLuint normalMap = loadTexture("../../../resources/textures/toy_box_normal.png");
//GLuint heightMap = loadTexture("../../../resources/textures/toy_box_disp.png");
// Set texture units
shader.Use();
glUniform1i(glGetUniformLocation(shader.Program, "diffuseMap"), 0);
glUniform1i(glGetUniformLocation(shader.Program, "normalMap"), 1);
glUniform1i(glGetUniformLocation(shader.Program, "depthMap"), 2);
// Light position
glm::vec3 lightPos(0.5f, 1.0f, 0.3f);
// Game loop
while (!glfwWindowShouldClose(window))
{
// Set frame time
GLfloat currentFrame = glfwGetTime();
deltaTime = currentFrame - lastFrame;
lastFrame = currentFrame;
// Check and call events
glfwPollEvents();
Do_Movement();
// Clear the colorbuffer
glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Configure view/projection matrices
shader.Use();
glm::mat4 view = camera.GetViewMatrix();
glm::mat4 projection = glm::perspective(camera.Zoom, (GLfloat)SCR_WIDTH / (GLfloat)SCR_HEIGHT, 0.1f, 100.0f);
glUniformMatrix4fv(glGetUniformLocation(shader.Program, "view"), 1, GL_FALSE, glm::value_ptr(view));
glUniformMatrix4fv(glGetUniformLocation(shader.Program, "projection"), 1, GL_FALSE, glm::value_ptr(projection));
// Render normal-mapped quad
glm::mat4 model;
model = glm::rotate(model, (GLfloat)glfwGetTime() * -10, glm::normalize(glm::vec3(1.0, 0.0, 1.0))); // Rotates the quad to show parallax mapping works in all directions
glUniformMatrix4fv(glGetUniformLocation(shader.Program, "model"), 1, GL_FALSE, glm::value_ptr(model));
glUniform3fv(glGetUniformLocation(shader.Program, "lightPos"), 1, &lightPos[0]);
glUniform3fv(glGetUniformLocation(shader.Program, "viewPos"), 1, &camera.Position[0]);
glUniform1f(glGetUniformLocation(shader.Program, "height_scale"), height_scale);
glUniform1i(glGetUniformLocation(shader.Program, "parallax"), parallax_mapping);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, diffuseMap);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, normalMap);
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_2D, heightMap);
RenderQuad();
// render light source (simply renders a smaller plane at the light's position for debugging/visualization)
model = glm::mat4();
model = glm::translate(model, lightPos);
model = glm::scale(model, glm::vec3(0.1f));
glUniformMatrix4fv(glGetUniformLocation(shader.Program, "model"), 1, GL_FALSE, glm::value_ptr(model));
//RenderQuad();
// Swap the buffers
glfwSwapBuffers(window);
}
glfwTerminate();
return 0;
}
GLint ShaderProgram::getUniformLocation(const GLchar *name)
{
return glGetUniformLocation(m_program, name);
}
GLUSboolean init(GLUSvoid)
{
GLfloat* points = (GLfloat*) malloc(WATER_PLANE_LENGTH * WATER_PLANE_LENGTH * 4 * sizeof(GLfloat));
GLuint* indices = (GLuint*) malloc(WATER_PLANE_LENGTH * (WATER_PLANE_LENGTH - 1) * 2 * sizeof(GLuint));
GLUStgaimage image;
GLUStextfile vertexSource;
GLUStextfile fragmentSource;
GLuint x, z, i, k;
GLuint waterTexture;
for (z = 0; z < WATER_PLANE_LENGTH; z++)
{
for (x = 0; x < WATER_PLANE_LENGTH; x++)
{
points[(x + z * (WATER_PLANE_LENGTH)) * 4 + 0] = -(GLfloat) WATER_PLANE_LENGTH / 2 + 0.5f + (GLfloat) x;
points[(x + z * (WATER_PLANE_LENGTH)) * 4 + 1] = 0.0f;
points[(x + z * (WATER_PLANE_LENGTH)) * 4 + 2] = +(GLfloat) WATER_PLANE_LENGTH / 2 - 0.5f - (GLfloat) z;
points[(x + z * (WATER_PLANE_LENGTH)) * 4 + 3] = 1.0f;
}
}
for (k = 0; k < WATER_PLANE_LENGTH - 1; k++)
{
for (i = 0; i < WATER_PLANE_LENGTH; i++)
{
if (k % 2 == 0)
{
indices[(i + k * (WATER_PLANE_LENGTH)) * 2 + 0] = i + (k + 1) * WATER_PLANE_LENGTH;
indices[(i + k * (WATER_PLANE_LENGTH)) * 2 + 1] = i + k * WATER_PLANE_LENGTH;
}
else
{
indices[(i + k * (WATER_PLANE_LENGTH)) * 2 + 0] = WATER_PLANE_LENGTH - 1 - i + k * WATER_PLANE_LENGTH;
indices[(i + k * (WATER_PLANE_LENGTH)) * 2 + 1] = WATER_PLANE_LENGTH - 1 - i + (k + 1) * WATER_PLANE_LENGTH;
}
}
}
//
glusFileLoadText("../Example15_ES/shader/Water.vert.glsl", &vertexSource);
glusFileLoadText("../Example15_ES/shader/Water.frag.glsl", &fragmentSource);
glusProgramBuildFromSource(&g_program, (const GLUSchar**) &vertexSource.text, (const GLUSchar**) &fragmentSource.text);
glusFileDestroyText(&vertexSource);
glusFileDestroyText(&fragmentSource);
//
g_projectionMatrixLocation = glGetUniformLocation(g_program.program, "u_projectionMatrix");
g_viewMatrixLocation = glGetUniformLocation(g_program.program, "u_viewMatrix");
g_inverseViewNormalMatrixLocation = glGetUniformLocation(g_program.program, "u_inverseViewNormalMatrix");
g_waterPlaneLengthLocation = glGetUniformLocation(g_program.program, "u_waterPlaneLength");
g_cubemapLocation = glGetUniformLocation(g_program.program, "u_cubemap");
g_waterTextureLocation = glGetUniformLocation(g_program.program, "u_waterTexture");
g_passedTimeLocation = glGetUniformLocation(g_program.program, "u_passedTime");
g_waveParametersLocation = glGetUniformLocation(g_program.program, "u_waveParameters");
g_waveDirectionsLocation = glGetUniformLocation(g_program.program, "u_waveDirections");
g_vertexLocation = glGetAttribLocation(g_program.program, "a_vertex");
//
glGenBuffers(1, &g_verticesVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glBufferData(GL_ARRAY_BUFFER, WATER_PLANE_LENGTH * WATER_PLANE_LENGTH * 4 * sizeof(GLfloat), (GLfloat*) points, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenBuffers(1, &g_indicesVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, WATER_PLANE_LENGTH * (WATER_PLANE_LENGTH - 1) * 2 * sizeof(GLuint), (GLuint*) indices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
//
free(points);
free(indices);
//
glGenTextures(1, &g_cubemap);
glBindTexture(GL_TEXTURE_CUBE_MAP, g_cubemap);
glusImageLoadTga("water_pos_x.tga", &image);
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusImageDestroyTga(&image);
glusImageLoadTga("water_neg_x.tga", &image);
glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_X, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusImageDestroyTga(&image);
glusImageLoadTga("water_pos_y.tga", &image);
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_Y, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusImageDestroyTga(&image);
glusImageLoadTga("water_neg_y.tga", &image);
glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_Y, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusImageDestroyTga(&image);
glusImageLoadTga("water_pos_z.tga", &image);
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_Z, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusImageDestroyTga(&image);
glusImageLoadTga("water_neg_z.tga", &image);
glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_Z, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glusImageDestroyTga(&image);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
//
waterTexture = initWaterTexture((GLUSfloat) WATER_PLANE_LENGTH);
glUseProgram(g_program.program);
glUniform1f(g_waterPlaneLengthLocation, (GLUSfloat) WATER_PLANE_LENGTH);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_CUBE_MAP, g_cubemap);
glUniform1i(g_cubemapLocation, 0);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, waterTexture);
glUniform1i(g_waterTextureLocation, 1);
glGenVertexArrays(1, &g_vao);
glBindVertexArray(g_vao);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesVBO);
glVertexAttribPointer(g_vertexLocation, 4, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(g_vertexLocation);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesVBO);
//
initBackground();
//
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClearDepthf(1.0f);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
return GLUS_TRUE;
}
GLint Program::uniformLocation(const GLchar *name) const
{
return glGetUniformLocation(m_Id, name);
}
void Assignment1::Init()
{
// Init VBO here
// Set background color to dark blue
glClearColor(0.3f, 0.0f, 0.0f, 0.0f);
// Generate a default VAO for now
glGenVertexArrays(1, &m_vertexArrayID);
glBindVertexArray(m_vertexArrayID);
glGenBuffers(NUM_GEOMETRY, &m_vertexBuffer[0]);
glGenBuffers(NUM_GEOMETRY, &m_colorBuffer[0]);
static const GLfloat vertex_buffer_data[] =
{
0.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f,
1.0f, 0.1f, 0.0f,
};
glBindBuffer(GL_ARRAY_BUFFER, m_vertexBuffer[GEO_TRIANGLE_1]);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertex_buffer_data), vertex_buffer_data, GL_STATIC_DRAW);
static const GLfloat vertex_buffer_data1[] =
{
0.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f,
1.0f, 1.0f, 0.0f,
};
glBindBuffer(GL_ARRAY_BUFFER, m_vertexBuffer[GEO_TRIANGLE_2]);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertex_buffer_data1), vertex_buffer_data1, GL_STATIC_DRAW);
static const GLfloat vertex_buffer_data2[] =
{
0.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f,
1.0f, 1.0f, 0.0f,
0.0f, 0.0f, 0.0f,
1.0f, 0.0f, 0.0f,
1.0f, 1.0f, 0.0f,
};
glBindBuffer(GL_ARRAY_BUFFER, m_vertexBuffer[GEO_TRIANGLE_3]);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertex_buffer_data2), vertex_buffer_data2, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, m_vertexBuffer[GEO_DOOR]);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertex_buffer_data2), vertex_buffer_data2, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, m_vertexBuffer[GEO_CLOUD]);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertex_buffer_data2), vertex_buffer_data2, GL_STATIC_DRAW);
static const GLfloat vertex_buffer_data3[] =
{
-1.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f,
1.0f, 0.0f, 0.0f,
};
glBindBuffer(GL_ARRAY_BUFFER, m_vertexBuffer[GEO_BIRD]);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertex_buffer_data3), vertex_buffer_data3, GL_STATIC_DRAW);
static const GLfloat color_buffer_data[] =
{
1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 0.0f,
1.0f, 0.0f, 0.0f,
};
glBindBuffer(GL_ARRAY_BUFFER, m_colorBuffer[GEO_TRIANGLE_1]);
glBufferData(GL_ARRAY_BUFFER, sizeof(color_buffer_data), color_buffer_data, GL_STATIC_DRAW);
static const GLfloat color_buffer_data1[] =
{
0.0f, 1.0f, 0.0f,
0.0f, 1.0f, 0.0f,
0.0f, 1.0f, 0.0f,
};
glBindBuffer(GL_ARRAY_BUFFER, m_colorBuffer[GEO_TRIANGLE_2]);
glBufferData(GL_ARRAY_BUFFER, sizeof(color_buffer_data1), color_buffer_data1, GL_STATIC_DRAW);
static const GLfloat color_buffer_data2[] =
{
0.0f, 0.0f, 0.0f,
0.0f, 0.0f, 0.0f,
1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 0.0f,
1.0f, 0.0f, 0.0f,
1.0f, 0.0f, 0.0f,
};
glBindBuffer(GL_ARRAY_BUFFER, m_colorBuffer[GEO_TRIANGLE_3]);
glBufferData(GL_ARRAY_BUFFER, sizeof(color_buffer_data2), color_buffer_data2, GL_STATIC_DRAW);
static const GLfloat color_buffer_data3[] =
{
1.0f, 0.0f, 0.0f,
1.0f, 0.0f, 0.0f,
1.0f, 1.0f, 1.0f,
1.0f, 0.0f, 0.0f,
1.0f, 1.0f, 1.0f,
1.0f, 1.0f, 1.0f,
};
glBindBuffer(GL_ARRAY_BUFFER, m_colorBuffer[GEO_DOOR]);
glBufferData(GL_ARRAY_BUFFER, sizeof(color_buffer_data3), color_buffer_data3, GL_STATIC_DRAW);
static const GLfloat color_buffer_data4[] =
{
0.0f, 0.0f, 0.0f,
0.0f, 0.0f, 0.0f,
0.0f, 0.0f, 0.0f,
};
glBindBuffer(GL_ARRAY_BUFFER, m_colorBuffer[GEO_BIRD]);
glBufferData(GL_ARRAY_BUFFER, sizeof(color_buffer_data4), color_buffer_data4, GL_STATIC_DRAW);
static const GLfloat color_buffer_data5[] =
{
0.5f, 0.5f, 0.5f,
0.5f, 0.5f, 0.5f,
0.0f, 0.0f, 0.0f,
0.5f, 0.5f, 0.5f,
0.0f, 0.0f, 0.0f,
0.0f, 0.0f, 0.0f,
};
glBindBuffer(GL_ARRAY_BUFFER, m_colorBuffer[GEO_CLOUD]);
glBufferData(GL_ARRAY_BUFFER, sizeof(color_buffer_data5), color_buffer_data5, GL_STATIC_DRAW);
for (int i = 0; i < 100; i++)
{
rainpositionx[i] = rand() % 80 - 40;
rainpositiony[i] = rand() % 60 - 30;
}
//Load vertex and fragment shaders
m_programID = LoadShaders(
"Shader//TransformVertexShader.vertexshader",
"Shader//SimpleFragmentShader.fragmentshader");
m_parameters[U_MVP] = glGetUniformLocation(m_programID, "MVP");
glUseProgram(m_programID);
glEnable(GL_DEPTH_TEST);
rotateAngle = 0.0f;
translateX = 1;
translateX2 = 1;
translateY = 30;
scaleAll = 10;
}
