static void mouse(int button, int state, int x, int y)
{
if (button == GLUT_LEFT_BUTTON && state == GLUT_UP) {
g_resources.eye_offset[0] = 0.0f;
g_resources.eye_offset[1] = 0.0f;
update_mv_matrix(g_resources.mv_matrix, g_resources.eye_offset);
}
}
static void drag(int x, int y)
{
float w = (float)g_resources.window_size[0];
float h = (float)g_resources.window_size[1];
g_resources.eye_offset[0] = (float)x/w - 0.5f;
g_resources.eye_offset[1] = -(float)y/h + 0.5f;
update_mv_matrix(g_resources.mv_matrix, g_resources.eye_offset);
}
static int make_resources(void)
{
GLuint vertex_shader, fragment_shader, program;
g_resources.flag_vertex_array = init_flag_mesh(&g_resources.flag);
init_background_mesh(&g_resources.background);
g_resources.flag.texture = make_texture("flag.tga");
g_resources.background.texture = make_texture("background.tga");
if (!make_shadow_framebuffer(
&g_resources.shadowmap_texture,
&g_resources.shadowmap_framebuffer
)) {
return 0;
}
if (g_resources.flag.texture == 0 || g_resources.background.texture == 0)
return 0;
struct flag_shaders shaders;
if (!make_flag_programs(&shaders))
return 0;
enact_flag_programs(&shaders);
g_resources.eye_offset[0] = 0.0f;
g_resources.eye_offset[1] = 0.0f;
g_resources.window_size[0] = INITIAL_WINDOW_WIDTH;
g_resources.window_size[1] = INITIAL_WINDOW_HEIGHT;
g_resources.light_direction[0] = 0.408248;
g_resources.light_direction[1] = -0.816497;
g_resources.light_direction[2] = 0.408248;
update_p_matrix(
g_resources.p_matrix,
INITIAL_WINDOW_WIDTH,
INITIAL_WINDOW_HEIGHT
);
update_mv_matrix(g_resources.mv_matrix, g_resources.eye_offset);
update_shadow_matrix(g_resources.shadow_matrix, g_resources.light_direction);
return 1;
}
//--------------------------------------------------------------
void testApp::draw(){
unsigned long long cur_time = ofGetSystemTime();
update_p_matrix(proj_mat, screen_width, screen_height);
update_mv_matrix(mv_mat, 0);
glMatrixMode(GL_PROJECTION);
glLoadMatrixf(proj_mat);
glMatrixMode(GL_MODELVIEW);
glLoadMatrixf(mv_mat);
if (!use_easycam) look();
else easycam.begin();
glVertexPointer(3,GL_FLOAT,sizeof(GLfloat)*3,(void*)0);
glEnableClientState(GL_VERTEX_ARRAY);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, elementBuffer);
glDrawElements(
GL_QUADS,
e_buffer_size, /* count */
GL_UNSIGNED_INT,
(void*)0 /* element array buffer offset */
);
glDisableClientState(GL_VERTEX_ARRAY);
// print framerate to stdout every second
static unsigned long long last_fps_tick = 0;
if (cur_time > last_fps_tick + 1000)
{
last_fps_tick = cur_time;
cout << ofToString(ofGetFrameRate(), 2) << " fps" << endl;
}
GLenum err = glGetError();
if (err)
{
//breakpoint?
if (false)
cout << "error" << endl;
}
last_time = cur_time;
if (use_easycam) easycam.end();
}
//--------------------------------------------------------------
void testApp::setup(){
g_element_buffer_data = NULL;
g_vertex_buffer_data = NULL;
move_camera = false;
x_res = 100,
z_res = 100; // number of *vertices* on x & z axis
last_time = 0;
// enable alpha blending
glEnable( GL_BLEND );
glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
// Draw in wireframe mode
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
ofSetLogLevel(OF_LOG_VERBOSE);
ofBackground(0,0,0);
// load shaders?
// Initialize projection and model view matrices
update_p_matrix(proj_mat, screen_width, screen_height);
update_mv_matrix(mv_mat, 0);
glMatrixMode(GL_PROJECTION);
glLoadMatrixf(proj_mat);
glMatrixMode(GL_MODELVIEW);
glLoadMatrixf(mv_mat);
// init GL buffers
glGenBuffers(1, &vertexBuffer);
glGenBuffers(1, &elementBuffer);
// initialize shape
shape = SHAPE_PLANE;
generateWireframe();
bufferGrid();
// Easycam allows mouse interaction
use_easycam=false;
easycam.setNearClip( 0.0625);
easycam.setDistance(1.0);
}
//--------------------------------------------------------------
void testApp::setup(){
g_element_buffer_data = NULL;
g_vertex_buffer_data = NULL;
move_camera = false;
x_res = 200,
z_res = 200; // number of *vertices* on x & z axis
last_time = 0;
glDisable(GL_DEPTH_TEST);
glEnable( GL_BLEND );
glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
ofSetLogLevel(OF_LOG_VERBOSE);
ofBackground(0,0,0,0);
shader.load("vertex.glsl", "fragment.glsl");
vert_3d_attrib = shader.getAttributeLocation("position");
proj_mat_attrib = shader.getAttributeLocation("u_proj_matrix");
offset_attrib = shader.getAttributeLocation("u_offset");
shader.setUniform2f("u_offset", 0.0,0.0);
//shader.begin();
shader.setUniform1f("u_scale", 1.0);
update_p_matrix(proj_mat, screen_width, screen_height);
update_mv_matrix(mv_mat, 0);
/*shader.setUniformMatrix4f("u_proj_matrix", proj_mat);
shader.setUniformMatrix4f("u_mv_matrix", mv_mat);*/
//glMatrixMode(GL_PROJECTION);
//glLoadMatrixf(proj_mat);
//glMatrixMode(GL_MODELVIEW);
//glLoadMatrixf(mv_mat);
// init GL buffers
glGenBuffers(1, &vertexBuffer);
glGenBuffers(1, &elementBuffer);
}
//--------------------------------------------------------------
void testApp::draw(){
static bool mat_init = false;
if (!mat_init)
{
// not sure why this part is necessary as we init'd proj and mv matrices in setup()
update_p_matrix(proj_mat, screen_width, screen_height);
update_mv_matrix(mv_mat, 0);
mat_init = true;
}
// Need to push proj and modelview matrices b4 drawing mesh, then pop after, to be able to draw text afterwards
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadMatrixf(proj_mat);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
ofDrawBitmapString("Test", 10,10);
unsigned long long cur_time = ofGetSystemTime();
ofDrawBitmapString("Test3", 10,50);
shader.begin();
shader.setUniform2f("u_offset", 0.0,0.0);
shader.setUniform1f("u_scale", 1.0);
innerDraw();
shader.end();
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
glPopMatrix();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
// show fps
string str = "framerate: ";
str += ofToString(ofGetFrameRate(), 2) + "fps";
ofDrawBitmapString(str, 20, 20);
ofDrawBitmapString("HELLLOO", 40,40);
//glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
// PROBLEM - using my own low level opengl calls seems to cause a problem with
// openframeworks own text drawing
//string str = "framerate: ";
//str += ofToString(ofGetFrameRate(), 2) + "fps";
//ofDrawBitmapStringHighlight(str, 0, 0);
//ofDrawBitmapStringHighlight("Test", 20, 10);
// instead print framerate to stdout every second
static unsigned long long last_fps_tick = 0;
if (cur_time > last_fps_tick + 1000)
{
last_fps_tick = cur_time;
cout << ofToString(ofGetFrameRate(), 2) << " fps" << endl;
}
GLenum err = glGetError();
if (err)
{
//breakpoint?
if (false)
cout << "error" << endl;
}
last_time = cur_time;
}