bool load_content() {
// Create plane mesh
meshes["plane"] = mesh(geometry_builder::create_plane());
// Create scene
meshes["box"] = mesh(geometry_builder::create_box());
meshes["tetra"] = mesh(geometry_builder::create_tetrahedron());
meshes["pyramid"] = mesh(geometry_builder::create_pyramid());
meshes["disk"] = mesh(geometry_builder::create_disk(20));
meshes["cylinder"] = mesh(geometry_builder::create_cylinder(20, 20));
meshes["sphere"] = mesh(geometry_builder::create_sphere(20, 20));
meshes["torus"] = mesh(geometry_builder::create_torus(20, 20, 1.0f, 5.0f));
// Transform objects
meshes["box"].get_transform().scale = vec3(5.0f, 5.0f, 5.0f);
meshes["box"].get_transform().translate(vec3(-10.0f, 2.5f, -30.0f));
meshes["tetra"].get_transform().scale = vec3(4.0f, 4.0f, 4.0f);
meshes["tetra"].get_transform().translate(vec3(-30.0f, 10.0f, -10.0f));
meshes["pyramid"].get_transform().scale = vec3(5.0f, 5.0f, 5.0f);
meshes["pyramid"].get_transform().translate(vec3(-10.0f, 7.5f, -30.0f));
meshes["disk"].get_transform().scale = vec3(3.0f, 1.0f, 3.0f);
meshes["disk"].get_transform().translate(vec3(-10.0f, 11.5f, -30.0f));
meshes["disk"].get_transform().rotate(vec3(half_pi<float>(), 0.0f, 0.0f));
meshes["cylinder"].get_transform().scale = vec3(5.0f, 5.0f, 5.0f);
meshes["cylinder"].get_transform().translate(vec3(-25.0f, 2.5f, -25.0f));
meshes["sphere"].get_transform().scale = vec3(2.5f, 2.5f, 2.5f);
meshes["sphere"].get_transform().translate(vec3(-25.0f, 10.0f, -25.0f));
meshes["torus"].get_transform().translate(vec3(-25.0f, 10.0f, -25.0f));
meshes["torus"].get_transform().rotate(vec3(half_pi<float>(), 0.0f, 0.0f));
// Load texture
tex = texture("textures/checker.png");
// Load in shaders
eff.add_shader("27_Texturing_Shader/simple_texture.vert", GL_VERTEX_SHADER);
eff.add_shader("27_Texturing_Shader/simple_texture.frag", GL_FRAGMENT_SHADER);
// Build effect
eff.build();
// Set camera properties
cam.set_position(vec3(0.0f, 10.0f, 0.0f));
cam.set_target(vec3(0.0f, 0.0f, 0.0f));
cam.set_projection(quarter_pi<float>(), renderer::get_screen_aspect(), 0.1f, 1000.0f);
return true;
}
bool render() {
// Render meshes
for (auto &e : meshes) {
auto m = e.second;
// Bind effect
renderer::bind(eff);
// Create MVP matrix
auto M = m.get_transform().get_transform_matrix();
auto V = cam.get_view();
auto P = cam.get_projection();
auto MVP = P * V * M;
// Set MVP matrix uniform
glUniformMatrix4fv(eff.get_uniform_location("MVP"), 1, GL_FALSE, value_ptr(MVP));
// Bind and set texture
renderer::bind(tex, 0);
glUniform1i(eff.get_uniform_location("tex"), 0);
// Render mesh
renderer::render(m);
}
return true;
}
bool load_content()
{
// Create plane mesh
meshes["plane"] = mesh(geometry_builder::create_plane());
// Create scene
meshes["box"] = mesh(geometry_builder::create_box());
meshes["tetra"] = mesh(geometry_builder::create_tetrahedron());
meshes["pyramid"] = mesh(geometry_builder::create_pyramid());
meshes["disk"] = mesh(geometry_builder::create_disk(20));
meshes["cylinder"] = mesh(geometry_builder::create_cylinder(20, 20));
meshes["sphere"] = mesh(geometry_builder::create_sphere(20, 20));
meshes["torus"] = mesh(geometry_builder::create_torus(20, 20, 1.0f, 5.0f));
// Transform objects
meshes["box"].get_transform().scale = vec3(5.0f, 5.0f, 5.0f);
meshes["box"].get_transform().translate(vec3(-10.0f, 2.5f, -30.0f));
meshes["tetra"].get_transform().scale = vec3(4.0f, 4.0f, 4.0f);
meshes["tetra"].get_transform().translate(vec3(-30.0f, 10.0f, -10.0f));
meshes["pyramid"].get_transform().scale = vec3(5.0f, 5.0f, 5.0f);
meshes["pyramid"].get_transform().translate(vec3(-10.0f, 7.5f, -30.0f));
meshes["disk"].get_transform().scale = vec3(3.0f, 1.0f, 3.0f);
meshes["disk"].get_transform().translate(vec3(-10.0f, 11.5f, -30.0f));
meshes["disk"].get_transform().rotate(vec3(half_pi<float>(), 0.0f, 0.0f));
meshes["cylinder"].get_transform().scale = vec3(5.0f, 5.0f, 5.0f);
meshes["cylinder"].get_transform().translate(vec3(-25.0f, 2.5f, -25.0f));
meshes["sphere"].get_transform().scale = vec3(2.5f, 2.5f, 2.5f);
meshes["sphere"].get_transform().translate(vec3(-25.0f, 10.0f, -25.0f));
meshes["torus"].get_transform().translate(vec3(-25.0f, 10.0f, -25.0f));
meshes["torus"].get_transform().rotate(vec3(half_pi<float>(), 0.0f, 0.0f));
// ***********************
// Set materials
// - all emissive is black
// - all specular is white
// - all shininess is 25
// ***********************
//map<string, material>::iterator it = materials.begin(); it!;
for (auto &m : materials)
{
m.second.set_shininess(50);
m.second.set_specular(vec4(1.0, 1.0, 1.0, 1.0));
m.second.set_emissive(vec4(0.0, 0.0, 0.0, 1.0));
}
// Red box
materials["box"].set_diffuse(vec4(1.0, 0.0, 0.0, 1.0));
meshes["box"].set_material(materials["box"]);
// Green tetra
materials["tetra"].set_diffuse(vec4(0.0, 1.0, 0.0, 1.0));
meshes["tetra"].set_material( materials["tetra"]);
// Blue pyramid
materials["pyramid"].set_diffuse(vec4(0.0, 0.0, 1.0, 1.0));
meshes["pyramid"].set_material(materials["pyramid"]);
// Yellow disk
materials["disk"].set_diffuse(vec4(1.0, 1.0, 0.0, 1.0));
meshes["disk"].set_material(materials["disk"]);
// Magenta cylinder
materials["cylinder"].set_diffuse(vec4(0.0, 1.0, 1.0, 1.0));
meshes["cylinder"].set_material(materials["cylinder"]);
// Cyan sphere
materials["sphere"].set_diffuse(vec4(1.0, 0.0, 1.0, 1.0));
meshes["sphere"].set_material(materials["sphere"]);
// White torus
materials["torus"].set_diffuse(vec4(1.0, 1.0, 1.0, 1.0));
meshes["torus"].set_material(materials["torus"]);
// create light source
meshes["light"] = mesh(geometry_builder::create_sphere(20, 20));
meshes["light"].get_transform().position = vec3(1.0f, 1.0f, -1.0f);
// **************************
// Load texture - checked.gif
// **************************
tex = texture("..\\resources\\textures\\checked.gif");
// *******************
// Set lighting values
// *******************
// ambient intensity (0.3, 0.3, 0.3)
light.set_ambient_intensity(vec4(0.3, 0.3, 0.3, 1.0));
// Light colour white
light.set_light_colour(vec4(1.0f, 1.0f, 1.0f, 1.0f));
// Light direction (1.0, 1.0, -1.0)
light.set_direction(vec3(1.0f, 1.0f, -1.0f));
// Load in shaders
eff.add_shader("..\\resources\\shaders\\gouraud.vert", GL_VERTEX_SHADER);
eff.add_shader("..\\resources\\shaders\\gouraud.frag", GL_FRAGMENT_SHADER);
// Build effect
eff.build();
if (CHECK_GL_ERROR)
{
__debugbreak();
}
// Set camera properties
cam.set_position(vec3(50.0f, 10.0f, 50.0f));
cam.set_target(vec3(0.0f, 0.0f, 0.0f));
auto aspect = static_cast<float>(renderer::get_screen_width()) / static_cast<float>(renderer::get_screen_height());
cam.set_projection(quarter_pi<float>(), aspect, 2.414f, 1000.0f);
if (CHECK_GL_ERROR)
{
__debugbreak();
}
return true;
}
bool render()
{
// Render meshes
for (auto &e : meshes)
{
auto m = e.second;
if (CHECK_GL_ERROR)
{
__debugbreak();
}
// Bind effect
renderer::bind(eff);
if (CHECK_GL_ERROR)
{
__debugbreak();
}
// Create MVP matrix
auto M = m.get_transform().get_transform_matrix();
auto V = cam.get_view();
auto P = cam.get_projection();
auto MVP = P * V * M;
// Set MVP matrix uniform
glUniformMatrix4fv(
eff.get_uniform_location("MVP"), // Location of uniform
1, // Number of values - 1 mat4
GL_FALSE, // Transpose the matrix?
value_ptr(MVP)); // Pointer to matrix data
// ********************
// Set M matrix uniform
// ********************
glUniformMatrix4fv(eff.get_uniform_location("M"), 1, GL_FALSE, value_ptr(M));
// ***********************
// Set N matrix uniform
// - remember - 3x3 matrix
// ***********************
mat3 N = mat3(M);
N = transpose(N);
glUniformMatrix3fv(eff.get_uniform_location("N"), 1, GL_FALSE, value_ptr(N));
// *************
// Bind material
// *************
material mm = m.get_material();
renderer::bind(mm, "mat");
// **********
// Bind light
// **********
//glUniform4fv(eff.get_uniform_location("light.ambient_intensity"), 1, value_ptr(light.get_ambient_intensity));
renderer::bind(light, "light");
// ************
// Bind texture
// ************
renderer::bind(tex, 0);
// ***************
// Set tex uniform
// ***************
glUniform1i(eff.get_uniform_location("tex"), 0);
// *****************************
// Set eye position
// - Get this from active camera
// *****************************
vec3 eyeP = cam.get_position();
glUniform3f(eff.get_uniform_location("eye_pos"), eyeP.x, eyeP.y, eyeP.z);
// Render mesh
renderer::render(m);
}
return true;
}
bool update(float delta_time)
{
// The ratio of pixels to rotation - remember the fov
static double ratio_width = quarter_pi<float>() / static_cast<float>(renderer::get_screen_width());
static double ratio_height = (quarter_pi<float>() * (static_cast<float>(renderer::get_screen_height()) / static_cast<float>(renderer::get_screen_width()))) / static_cast<float>(renderer::get_screen_height());
// *******************************
// Get the current cursor position
// *******************************
glfwGetCursorPos(window, &new_x, &new_y);
// ***************************************************
// Calculate delta of cursor positions from last frame
// ***************************************************
if (firstMouse)
{
current_x = xpos;
current_y = ypos;
firstMouse = false;
}
double delta_x = new_x - current_x;
double delta_y = new_y - current_y;
// *************************************************************
// Multiply deltas by ratios - gets actual change in orientation
// *************************************************************
delta_x *= ratio_width;
delta_y *= -ratio_height;
// *************************
// Rotate cameras by delta
// delta_y - x-axis rotation
// delta_x - y-axis rotation
// *************************
cam.rotate((float)delta_x, (float)delta_y);
// *******************************
// Use keyboard to move the camera
// - WSAD
// *******************************
if (glfwGetKey(renderer::get_window(), GLFW_KEY_W))
cam.move(vec3(0.0f, 0.0f, 1.0f));
if (glfwGetKey(renderer::get_window(), GLFW_KEY_A))
cam.move(vec3(-1.0f, 0.0f, 0.0f));
if (glfwGetKey(renderer::get_window(), GLFW_KEY_D))
cam.move(vec3(1.0f, 0.0f, 0.0f));
if (glfwGetKey(renderer::get_window(), GLFW_KEY_S))
cam.move(vec3(0.0f, 0.0f, -1.0f));
// ***********
// Move camera
// ***********
// *****************
// Update the camera
// *****************
cam.update(delta_time);
// *****************
// Update cursor pos
// *****************
glfwGetCursorPos(window, ¤t_x, ¤t_y);
return true;
}