nuclear@9: #include <stdio.h>
nuclear@9: #include <stdlib.h>
nuclear@9: #include <algorithm>
nuclear@9: #include <goat3dgfx/goat3dgfx.h>
nuclear@9: #include <vmath/vmath.h>
nuclear@9: 
nuclear@17: using namespace goatgfx;
nuclear@17: 
nuclear@9: #define CUBEMAP_FILENAME	"data/cubemap2.jpg"
nuclear@9: 
nuclear@9: static bool init();
nuclear@9: static void cleanup();
nuclear@9: static void display();
nuclear@9: static void skybox(const TextureCube *cubemap = 0);
nuclear@9: static void reshape(int x, int y);
nuclear@9: static void keyboard(unsigned char key, int x, int y);
nuclear@9: static void mouse(int bn, int st, int x, int y);
nuclear@9: static void motion(int x, int y);
nuclear@9: 
nuclear@9: static float cam_theta, cam_phi;
nuclear@9: 
nuclear@9: static TextureCube *cubemap;
nuclear@9: static ShaderProg *sdrsky;
nuclear@9: 
nuclear@9: int main(int argc, char **argv)
nuclear@9: {
nuclear@9: 	glutInit(&argc, argv);
nuclear@9: 	glutInitWindowSize(800, 600);
nuclear@9: 	glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
nuclear@9: 	glutCreateWindow("cubemap");
nuclear@9: 
nuclear@9: 	glutDisplayFunc(display);
nuclear@9: 	glutReshapeFunc(reshape);
nuclear@9: 	glutKeyboardFunc(keyboard);
nuclear@9: 	glutMouseFunc(mouse);
nuclear@9: 	glutMotionFunc(motion);
nuclear@9: 
nuclear@9: 	if(!init()) {
nuclear@9: 		return 1;
nuclear@9: 	}
nuclear@9: 	atexit(cleanup);
nuclear@9: 
nuclear@9: 	glutMainLoop();
nuclear@9: 	return 0;
nuclear@9: }
nuclear@9: 
nuclear@9: static bool init()
nuclear@9: {
nuclear@9: 	glewInit();
nuclear@9: 
nuclear@9: 	glEnable(GL_DEPTH_TEST);
nuclear@9: 	//glEnable(GL_CULL_FACE);
nuclear@9: 
nuclear@9: 	cubemap = new TextureCube;
nuclear@9: 	if(!cubemap->load(CUBEMAP_FILENAME)) {
nuclear@9: 		fatal_log("Failed to load cubemap: %s\n", CUBEMAP_FILENAME);
nuclear@9: 		return false;
nuclear@9: 	}
nuclear@9: 
nuclear@9: 	if(!(sdrsky = get_sdrprog("sdr/sky.v.glsl", "sdr/sky.p.glsl"))) {
nuclear@9: 		fatal_log("failed to load skybox shader\n");
nuclear@9: 		return false;
nuclear@9: 	}
nuclear@9: 
nuclear@9: 	return true;
nuclear@9: }
nuclear@9: 
nuclear@9: static void cleanup()
nuclear@9: {
nuclear@9: 	delete cubemap;
nuclear@9: }
nuclear@9: 
nuclear@9: static void display()
nuclear@9: {
nuclear@9: 	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
nuclear@9: 
nuclear@9: 	Matrix4x4 view_matrix;
nuclear@9: 	view_matrix.rotate(Vector3(1, 0, 0), M_PI * cam_phi / 180.0);
nuclear@9: 	view_matrix.rotate(Vector3(0, 1, 0), M_PI * cam_theta / 180.0);
nuclear@9: 	set_view_matrix(view_matrix);
nuclear@9: 
nuclear@9: 	setup_gl_matrices();
nuclear@9: 
nuclear@9: 	skybox(cubemap);
nuclear@9: 
nuclear@9: 	glutSwapBuffers();
nuclear@9: 	CHECKGLERR;
nuclear@9: }
nuclear@9: 
nuclear@9: static void skybox(const TextureCube *cubemap)
nuclear@9: {
nuclear@9: 	static Mesh *skybox;
nuclear@9: 
nuclear@9: 	if(!skybox) {
nuclear@9: 		skybox = new Mesh;
nuclear@9: 		gen_sphere(skybox, 10.0, 12, 6);
nuclear@9: 	}
nuclear@9: 
nuclear@9: 	glPushAttrib(GL_ENABLE_BIT | GL_TEXTURE_BIT);
nuclear@9: 	glDisable(GL_DEPTH_TEST);
nuclear@9: 	glDisable(GL_CULL_FACE);
nuclear@9: 	glDisable(GL_LIGHTING);
nuclear@9: 
nuclear@9: 	glEnable(GL_TEXTURE_CUBE_MAP);
nuclear@9: 
nuclear@9: 	if(cubemap) cubemap->bind();
nuclear@9: 	sdrsky->bind();
nuclear@9: 
nuclear@9: 	skybox->draw();
nuclear@9: 
nuclear@9: 	glUseProgram(0);
nuclear@9: 	glPopAttrib();
nuclear@9: }
nuclear@9: 
nuclear@9: static void reshape(int x, int y)
nuclear@9: {
nuclear@9: 	glViewport(0, 0, x, y);
nuclear@9: 
nuclear@9: 	Matrix4x4 proj;
nuclear@9: 	proj.set_perspective(M_PI / 4.0, (float)x / (float)y, 0.5, 500.0);
nuclear@9: 	set_projection_matrix(proj);
nuclear@9: }
nuclear@9: 
nuclear@9: static void keyboard(unsigned char key, int x, int y)
nuclear@9: {
nuclear@9: 	switch(key) {
nuclear@9: 	case 27:
nuclear@9: 		exit(0);
nuclear@9: 	}
nuclear@9: }
nuclear@9: 
nuclear@9: static bool bnstate[16];
nuclear@9: static int prev_x, prev_y;
nuclear@9: 
nuclear@9: static void mouse(int bn, int st, int x, int y)
nuclear@9: {
nuclear@9: 	bnstate[bn - GLUT_LEFT_BUTTON] = st == GLUT_DOWN;
nuclear@9: 	prev_x = x;
nuclear@9: 	prev_y = y;
nuclear@9: }
nuclear@9: 
nuclear@9: static void motion(int x, int y)
nuclear@9: {
nuclear@9: 	int dx = x - prev_x;
nuclear@9: 	int dy = y - prev_y;
nuclear@9: 	prev_x = x;
nuclear@9: 	prev_y = y;
nuclear@9: 
nuclear@9: 	if(!dx && !dy) return;
nuclear@9: 
nuclear@9: 	if(bnstate[0]) {
nuclear@9: 		cam_theta += dx * 0.5;
nuclear@9: 		cam_phi += dy * 0.5;
nuclear@9: 		cam_phi = std::max(-90.0f, std::min(90.0f, cam_phi));
nuclear@9: 		glutPostRedisplay();
nuclear@9: 	}
nuclear@9: }