nuclear@0: #include <stdio.h>
nuclear@0: #include <stdlib.h>
nuclear@0: #include <assert.h>
nuclear@0: #include <vector>
nuclear@0: #include "opengl.h"
nuclear@0: #include "camera.h"
nuclear@0: 
nuclear@0: static bool init();
nuclear@0: static void cleanup();
nuclear@0: static void handle_input(float dt);
nuclear@0: static void disp();
nuclear@0: static void idle();
nuclear@0: static void reshape(int x, int y);
nuclear@0: static void keypress(unsigned char key, int x, int y);
nuclear@0: static void keyrelease(unsigned char key, int x, int y);
nuclear@0: static void mouse(int bn, int st, int x, int y);
nuclear@0: static void motion(int x, int y);
nuclear@0: 
nuclear@0: static goatgfx::VRFpsCamera cam;
nuclear@0: static std::vector<bool> keystate(256);
nuclear@0: 
nuclear@0: int main(int argc, char **argv)
nuclear@0: {
nuclear@0: 	glutInitWindowSize(800, 600);
nuclear@0: 	glutInit(&argc, argv);
nuclear@0: 	glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
nuclear@0: 	glutCreateWindow("symmetry");
nuclear@0: 
nuclear@0: 	glutDisplayFunc(disp);
nuclear@0: 	glutIdleFunc(idle);
nuclear@0: 	glutReshapeFunc(reshape);
nuclear@0: 	glutKeyboardFunc(keypress);
nuclear@0: 	glutKeyboardUpFunc(keyrelease);
nuclear@0: 	glutMouseFunc(mouse);
nuclear@0: 	glutMotionFunc(motion);
nuclear@0: 
nuclear@0: 	if(!init()) {
nuclear@0: 		return 1;
nuclear@0: 	}
nuclear@0: 	atexit(cleanup);
nuclear@0: 
nuclear@0: 	glutMainLoop();
nuclear@0: 	return 0;
nuclear@0: }
nuclear@0: 
nuclear@0: 
nuclear@0: static bool init()
nuclear@0: {
nuclear@0: 	glewInit();
nuclear@0: 
nuclear@0: 	glEnable(GL_DEPTH_TEST);
nuclear@0: 	glEnable(GL_CULL_FACE);
nuclear@0: 
nuclear@0: 	glEnable(GL_LIGHTING);
nuclear@0: 	glEnable(GL_LIGHT0);
nuclear@0: 
nuclear@0: 	cam.input_move(0, 1.65, 0);
nuclear@0: 
nuclear@0: 	return true;
nuclear@0: }
nuclear@0: 
nuclear@0: static void cleanup()
nuclear@0: {
nuclear@0: }
nuclear@0: 
nuclear@0: static void disp()
nuclear@0: {
nuclear@0: 	unsigned int msec = glutGet(GLUT_ELAPSED_TIME);
nuclear@0: 	static unsigned int prev_msec;
nuclear@0: 	float dt = (float)(msec - prev_msec) / 1000.0f;
nuclear@0: 
nuclear@0: 	handle_input(dt);
nuclear@0: 
nuclear@0: 	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
nuclear@0: 
nuclear@0: 	glMatrixMode(GL_MODELVIEW);
nuclear@0: 	glLoadIdentity();
nuclear@0: 	cam.use_inverse();
nuclear@0: 
nuclear@0: 	glBegin(GL_QUADS);
nuclear@0: 	glNormal3f(0, 1, 0);
nuclear@0: 	glVertex3f(-5, 0, 5);
nuclear@0: 	glVertex3f(5, 0, 5);
nuclear@0: 	glVertex3f(5, 0, -5);
nuclear@0: 	glVertex3f(-5, 0, -5);
nuclear@0: 	glEnd();
nuclear@0: 
nuclear@0: 	glFrontFace(GL_CW);
nuclear@0: 	glutSolidTeapot(1.0);
nuclear@0: 	glFrontFace(GL_CCW);
nuclear@0: 
nuclear@0: 	glutSwapBuffers();
nuclear@0: 	assert(glGetError() == GL_NO_ERROR);
nuclear@0: }
nuclear@0: 
nuclear@0: 
nuclear@0: static void handle_input(float dt)
nuclear@0: {
nuclear@0: 	Vector3 inpv;
nuclear@0: 	float offs = dt * 2.0;
nuclear@0: 
nuclear@0: 	if(keystate['w'] || keystate['W']) {
nuclear@0: 		inpv.z -= offs;
nuclear@0: 	}
nuclear@0: 	if(keystate['s'] || keystate['S']) {
nuclear@0: 		inpv.z += offs;
nuclear@0: 	}
nuclear@0: 	if(keystate['d'] || keystate['D']) {
nuclear@0: 		inpv.x += offs;
nuclear@0: 	}
nuclear@0: 	if(keystate['a'] || keystate['A']) {
nuclear@0: 		inpv.x -= offs;
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	cam.input_move(inpv.x, inpv.y, inpv.z);
nuclear@0: }
nuclear@0: 
nuclear@0: static void idle()
nuclear@0: {
nuclear@0: 	glutPostRedisplay();
nuclear@0: }
nuclear@0: 
nuclear@0: static void reshape(int x, int y)
nuclear@0: {
nuclear@0: 	glViewport(0, 0, x, y);
nuclear@0: 
nuclear@0: 	glMatrixMode(GL_PROJECTION);
nuclear@0: 	glLoadIdentity();
nuclear@0: 	gluPerspective(45.0, (float)x / (float)y, 0.5, 500.0);
nuclear@0: }
nuclear@0: 
nuclear@0: static void keypress(unsigned char key, int x, int y)
nuclear@0: {
nuclear@0: 	keystate[key] = true;
nuclear@0: 
nuclear@0: 	switch(key) {
nuclear@0: 	case 27:
nuclear@0: 		exit(0);
nuclear@0: 	}
nuclear@0: }
nuclear@0: 
nuclear@0: static void keyrelease(unsigned char key, int x, int y)
nuclear@0: {
nuclear@0: 	keystate[key] = false;
nuclear@0: }
nuclear@0: 
nuclear@0: static int prev_x, prev_y;
nuclear@0: static bool bnstate[32];
nuclear@0: 
nuclear@0: static void mouse(int bn, int st, int x, int y)
nuclear@0: {
nuclear@0: 	prev_x = x;
nuclear@0: 	prev_y = y;
nuclear@0: 	bnstate[bn - GLUT_LEFT_BUTTON] = st == GLUT_DOWN;
nuclear@0: }
nuclear@0: 
nuclear@0: static void motion(int x, int y)
nuclear@0: {
nuclear@0: 	int dx = x - prev_x;
nuclear@0: 	int dy = y - prev_y;
nuclear@0: 	prev_x = x;
nuclear@0: 	prev_y = y;
nuclear@0: 
nuclear@0: 	if(!dx && !dy) {
nuclear@0: 		return;
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	if(bnstate[0]) {
nuclear@0: 		float dtheta_deg = dy * 0.5;
nuclear@0: 		float dphi_deg = dx * 0.5;
nuclear@0: 
nuclear@0: 		cam.input_rotate(DEG_TO_RAD(dtheta_deg), DEG_TO_RAD(dphi_deg), 0);
nuclear@0: 	}
nuclear@0: }