int main(int argc, char** argv)
{
// If no arguments passed, print usage and exit
if (argc == 1) {
printf("Usage: %s scenefile.glsf filename.obj [filename.obj, ...]\n\n", argv[0]);
exit(0);
}
// Print the help message each time the program is run.
// This provides users with a list of keyboard commands to use.
printf("%s", help_msg);
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH | GLUT_MULTISAMPLE);
glutInitContextVersion (3, 2);
glutInitContextFlags (GLUT_FORWARD_COMPATIBLE);
glutInitWindowSize(WINDOW_WIDTH, WINDOW_HEIGHT);
glutInitWindowPosition(500, 300);
glutCreateWindow("Simple Open GL Program");
printf("%s\n%s\n", glGetString(GL_RENDERER), glGetString(GL_VERSION));
glewExperimental = GL_TRUE;
glewInit();
SceneState camera;
ss = &camera;
// Read and parse the scene file
readSceneFilename(argv);
// Read and parse each object file passed in
readObjFilenames(argc, argv);
// Add plane to list of objects.
Mesh plane("plane.obj", vec4(0.3, 0.3, 0.3, 1.0));
plane.ss = ss;
objects.push_back(plane);
// Initialize Shaders
uniform_color = InitShader("vshader.glsl", "singlecolor.glsl");
glUniform1i(glGetUniformLocation(uniform_color, "disks" ), disks);
cel_shading = InitShader("celshader.glsl", "celfragment.glsl");
shadow_shader = InitShader("vshadow.glsl", "fshadow.glsl");
phong_illumination = InitShader("vshader.glsl", "fshader.glsl");
// TODO: Add simple depth shader for rendering shadow texture.
cur_program = phong_illumination;
// Create manipulators
Mesh unit_x("unit_cube.obj", vec4(1.0, 0.0, 0.0, 1.0));
Mesh unit_y(UNIT_CUBE, vec4(0.0, 1.0, 0.0, 1.0));
Mesh unit_z(UNIT_CUBE, vec4(0.0, 0.0, 1.0, 1.0));
// Scale
unit_x.scale = unit_y.scale = unit_z.scale = Angel::Scale(0.5, 0.5, 0.5);
// Translate
unit_x.offset *= Angel::Translate(vec4(0.75, 0.0, 0.0, 0.0));
unit_y.offset *= Angel::Translate(vec4(0.0, 0.75, 0.0, 0.0));
unit_z.offset *= Angel::Translate(vec4(0.0, 0.0, 0.75, 0.0));
// Camera
unit_x.ss = ss;
unit_y.ss = ss;
unit_z.ss = ss;
manipulator.push_back(unit_x);
manipulator.push_back(unit_y);
manipulator.push_back(unit_z);
glEnable(GL_DEPTH_TEST);
// TODO: Start Shadow Buffers
glGenTextures(1, &shadow_texture);
glBindTexture(GL_TEXTURE_2D, shadow_texture);
// Reserve texture memory
glTexImage2D(
GL_TEXTURE_2D, 0,
GL_DEPTH_COMPONENT,
1024, 1024, 0,
GL_DEPTH_COMPONENT, GL_FLOAT, NULL
);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glGenFramebuffers(1, &shadow_buffer);
glBindFramebuffer(GL_FRAMEBUFFER, shadow_buffer);
glFramebufferTexture2D(
GL_FRAMEBUFFER,
GL_DEPTH_ATTACHMENT,
GL_TEXTURE_2D,
shadow_texture,
0
);
glDrawBuffer(GL_NONE);
// Make sure the frame buffer is good-to-go
if(glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
printf("Framebuffer not OK!\n");
}
// Unbind framebuffer until we need to render to it.
glBindTexture(GL_TEXTURE_2D, 0);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
// TODO: End Shadow Buffers
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
glClearColor( 1.0, 1.0, 1.0, 1.0 );
// Print the number of objects 'init-ed'
printf("Initialized: %ld objects\n\n", objects.size());
//NOTE: callbacks must go after window is created!!!
glutKeyboardFunc(keyboard);
glutMouseFunc(mouse);
glutMotionFunc(mouseMotion);
glutDisplayFunc(display);
if (ss->lens.size() == 4) {
glutReshapeFunc(myPerspectiveReshape);
} else {
glutReshapeFunc(myOrthoReshape);
}
glutMainLoop();
return(0);
}
