nuclear@0: #include <stdio.h>
nuclear@0: #include <stdlib.h>
nuclear@1: #include <string.h>
nuclear@0: #include <assert.h>
nuclear@8: #include "opengl.h"
nuclear@1: #include "vr.h"
nuclear@0: #include "camera.h"
nuclear@0: 
nuclear@0: static bool init();
nuclear@0: static void cleanup();
nuclear@0: static void disp();
nuclear@9: static void draw_scene();
nuclear@12: static void draw_teapot();
nuclear@13: static void draw_squares();
nuclear@12: static void draw_grid(float size, float spacing);
nuclear@0: static void idle();
nuclear@0: static void reshape(int x, int y);
nuclear@0: static void keyb(unsigned char key, int x, int y);
nuclear@8: static void keyup(unsigned char key, int x, int y);
nuclear@8: static void mouse(int bn, int st, int x, int y);
nuclear@8: static void motion(int x, int y);
nuclear@8: static void passive(int x, int y);
nuclear@0: static void sball_rotate(int rx, int ry, int rz);
nuclear@1: static bool parse_args(int argc, char **argv);
nuclear@0: 
nuclear@10: static VRFpsCamera cam;
nuclear@0: static int width, height;
nuclear@1: static bool use_vr = false;
nuclear@8: static bool mouselook = false;
nuclear@8: 
nuclear@8: static bool keystate[256];
nuclear@8: 
nuclear@12: static int rtarg_width, rtarg_height;
nuclear@12: static unsigned int fbo, tex[2], zbuf;
nuclear@12: 
nuclear@0: int main(int argc, char **argv)
nuclear@0: {
nuclear@3: 	glutInitWindowSize(1280, 800);
nuclear@0: 	glutInit(&argc, argv);
nuclear@1: 
nuclear@1: 	if(!parse_args(argc, argv)) {
nuclear@1: 		return 1;
nuclear@1: 	}
nuclear@1: 
nuclear@12: 	glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
nuclear@12: 	glutCreateWindow("oculus vr test 01");
nuclear@12: 
nuclear@12: 	width = glutGet(GLUT_WINDOW_WIDTH);
nuclear@12: 	height = glutGet(GLUT_WINDOW_HEIGHT);
nuclear@0: 
nuclear@0: 	glutDisplayFunc(disp);
nuclear@0: 	glutIdleFunc(idle);
nuclear@0: 	glutReshapeFunc(reshape);
nuclear@0: 	glutKeyboardFunc(keyb);
nuclear@8: 	glutKeyboardUpFunc(keyup);
nuclear@8: 	glutMouseFunc(mouse);
nuclear@8: 	glutMotionFunc(motion);
nuclear@0: 	glutSpaceballRotateFunc(sball_rotate);
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: static bool init()
nuclear@0: {
nuclear@9: 	glewInit(); // this must be first
nuclear@9: 
nuclear@0: 	glEnable(GL_DEPTH_TEST);
nuclear@0: 	glEnable(GL_LIGHTING);
nuclear@0: 	glEnable(GL_CULL_FACE);
nuclear@0: 
nuclear@0: 	glEnable(GL_LIGHT0);
nuclear@0: 	glEnable(GL_LIGHTING);
nuclear@0: 
nuclear@11: 	// y = height of neck
nuclear@11: 	cam.input_move(0, 1.65, 0);
nuclear@9: 
nuclear@12: 	if(use_vr) {
nuclear@12: 		if(vr_init(VR_INIT_OCULUS) == -1) {
nuclear@12: 			return false;
nuclear@12: 		}
nuclear@12: 
nuclear@12: 		// reshape to the size of the VR display
nuclear@12: 		int xsz = vr_get_width();
nuclear@12: 		int ysz = vr_get_height();
nuclear@12: 
nuclear@12: 		glutReshapeWindow(xsz, ysz);
nuclear@12: 
nuclear@12: 		rtarg_width = (xsz + xsz / 2) / 2;
nuclear@12: 		rtarg_height = ysz + ysz / 2;
nuclear@12: 	} else {
nuclear@12: 		rtarg_width = width;
nuclear@12: 		rtarg_height = height;
nuclear@0: 	}
nuclear@12: 
nuclear@13: 	printf("render target: %dx%d\n", rtarg_width, rtarg_height);
nuclear@13: 
nuclear@12: 	// create render targets for each eye
nuclear@12: 	GLenum wrap_mode = GL_CLAMP_TO_EDGE;
nuclear@12: 	if(!GLEW_SGIS_texture_edge_clamp) {
nuclear@12: 		wrap_mode = GL_CLAMP;
nuclear@12: 	}
nuclear@12: 
nuclear@12: 	glGenTextures(2, tex);
nuclear@12: 	for(int i=0; i<2; i++) {
nuclear@12: 		glBindTexture(GL_TEXTURE_2D, tex[i]);
nuclear@12: 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
nuclear@12: 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
nuclear@12: 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrap_mode);
nuclear@12: 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrap_mode);
nuclear@12: 		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, rtarg_width, rtarg_height, 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
nuclear@12: 	}
nuclear@12: 
nuclear@12: 	// create the depth render buffer
nuclear@12: 	glGenRenderbuffers(1, &zbuf);
nuclear@12: 	glBindRenderbuffer(GL_RENDERBUFFER, zbuf);
nuclear@12: 	glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, rtarg_width, rtarg_height);
nuclear@12: 
nuclear@12: 	// create the FBO
nuclear@12: 	glGenFramebuffers(1, &fbo);
nuclear@12: 	glBindFramebuffer(GL_FRAMEBUFFER, fbo);
nuclear@12: 	glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, tex[0], 0);
nuclear@12: 	glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, zbuf);
nuclear@12: 
nuclear@0: 	return true;
nuclear@0: }
nuclear@0: 
nuclear@0: static void cleanup()
nuclear@0: {
nuclear@12: 	glDeleteTextures(2, tex);
nuclear@12: 	glDeleteRenderbuffers(1, &zbuf);
nuclear@12: 	glDeleteFramebuffers(1, &fbo);
nuclear@1: 	vr_shutdown();
nuclear@0: }
nuclear@0: 
nuclear@14: static void handle_input(float dt)
nuclear@14: {
nuclear@14: 	Vector3 inpv;
nuclear@14: 	float offs = dt * 2.0;
nuclear@14: 
nuclear@14: 	if(keystate['w'] || keystate['W']) {
nuclear@14: 		inpv.z -= offs;
nuclear@14: 	}
nuclear@14: 	if(keystate['s'] || keystate['S']) {
nuclear@14: 		inpv.z += offs;
nuclear@14: 	}
nuclear@14: 	if(keystate['d'] || keystate['D']) {
nuclear@14: 		inpv.x += offs;
nuclear@14: 	}
nuclear@14: 	if(keystate['a'] || keystate['A']) {
nuclear@14: 		inpv.x -= offs;
nuclear@14: 	}
nuclear@14: 
nuclear@14: 	cam.input_move(inpv.x, inpv.y, inpv.z);
nuclear@14: }
nuclear@14: 
nuclear@0: static void disp()
nuclear@0: {
nuclear@14: 	static long prev_msec;
nuclear@14: 	long msec = glutGet(GLUT_ELAPSED_TIME);
nuclear@14: 	float dt = (msec - prev_msec) / 1000.0;
nuclear@14: 	prev_msec = msec;
nuclear@4: 
nuclear@14: 	handle_input(dt);
nuclear@12: 	cam.track_vr();
nuclear@0: 
nuclear@13: 	/*glMatrixMode(GL_PROJECTION);
nuclear@0: 	glLoadIdentity();
nuclear@13: 	float fov = RAD_TO_DEG(vr_get_fov());
nuclear@13: 	gluPerspective(fov, (float)rtarg_width / (float)rtarg_height, 0.25, 500.0);*/
nuclear@13: 	float proj_matrix[16];
nuclear@13: 
nuclear@13: 	float eye_dist = vr_get_eyedist();
nuclear@12: 
nuclear@12: 	glViewport(0, 0, rtarg_width, rtarg_height);
nuclear@12: 
nuclear@12: 	glClearColor(0.1, 0.1, 0.1, 1.0);
nuclear@12: 
nuclear@12: 	// draw left view
nuclear@12: 	glBindFramebuffer(GL_FRAMEBUFFER, fbo);
nuclear@12: 	glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, tex[0], 0);
nuclear@12: 
nuclear@12: 	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
nuclear@0: 
nuclear@13: 	glMatrixMode(GL_PROJECTION);
nuclear@13: 	vr_get_proj_matrix(proj_matrix, VR_EYE_LEFT);
nuclear@13: 	glLoadTransposeMatrixf(proj_matrix);
nuclear@13: 
nuclear@0: 	glMatrixMode(GL_MODELVIEW);
nuclear@9: 	glLoadIdentity();
nuclear@13: 	glTranslatef(eye_dist / 2.0, 0, 0);
nuclear@12: 	cam.use_inverse();
nuclear@12: 	draw_scene();
nuclear@0: 
nuclear@12: 
nuclear@12: 	// draw right view
nuclear@12: 	glBindFramebuffer(GL_FRAMEBUFFER, fbo);
nuclear@12: 	glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, tex[1], 0);
nuclear@12: 
nuclear@12: 	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
nuclear@12: 
nuclear@13: 	glMatrixMode(GL_PROJECTION);
nuclear@13: 	vr_get_proj_matrix(proj_matrix, VR_EYE_RIGHT);
nuclear@13: 	glLoadTransposeMatrixf(proj_matrix);
nuclear@13: 
nuclear@12: 	glMatrixMode(GL_MODELVIEW);
nuclear@12: 	glLoadIdentity();
nuclear@13: 	glTranslatef(-eye_dist / 2.0, 0, 0);
nuclear@9: 	cam.use_inverse();
nuclear@12: 	draw_scene();
nuclear@9: 
nuclear@12: 	// return to the regular window framebuffer
nuclear@12: 	glBindFramebuffer(GL_FRAMEBUFFER, 0);
nuclear@12: 	glViewport(0, 0, width, height);
nuclear@12: 
nuclear@12: 	glClearColor(0, 0, 0, 0);
nuclear@12: 	glClear(GL_COLOR_BUFFER_BIT);
nuclear@12: 
nuclear@12: 	vr_draw_eye(tex[0], VR_EYE_LEFT);
nuclear@12: 	vr_draw_eye(tex[1], VR_EYE_RIGHT);
nuclear@9: 
nuclear@9: 	glutSwapBuffers();
nuclear@9: 	assert(glGetError() == GL_NO_ERROR);
nuclear@13: 
nuclear@13: 	glFinish();
nuclear@9: }
nuclear@9: 
nuclear@12: 
nuclear@12: static void draw_scene()
nuclear@12: {
nuclear@12: 	float lpos[] = {0, 60, 0, 1};
nuclear@12: 	glLightfv(GL_LIGHT0, GL_POSITION, lpos);
nuclear@12: 
nuclear@14: 	draw_grid(50.0, 2.5);
nuclear@13: 
nuclear@12: 	static Vector2 teapos[] = {
nuclear@12: 		Vector2(-8, 8), Vector2(8, 8), Vector2(8, -8), Vector2(-8, -8)
nuclear@12: 	};
nuclear@12: 
nuclear@12: 	for(int i=0; i<4; i++) {
nuclear@12: 		glPushMatrix();
nuclear@12: 		glTranslatef(teapos[i].x, 0, teapos[i].y);
nuclear@12: 		draw_teapot();
nuclear@12: 		glPopMatrix();
nuclear@12: 	}
nuclear@12: 
nuclear@13: 	draw_squares();
nuclear@12: }
nuclear@12: 
nuclear@9: static void draw_teapot()
nuclear@9: {
nuclear@9: 	static int tealist;
nuclear@9: 
nuclear@9: 	if(!tealist) {
nuclear@9: 		tealist = glGenLists(1);
nuclear@9: 		glNewList(tealist, GL_COMPILE);
nuclear@9: 		glutSolidTeapot(1.0);
nuclear@9: 		glEndList();
nuclear@9: 	}
nuclear@9: 
nuclear@9: 	glFrontFace(GL_CW);
nuclear@9: 	glCallList(tealist);
nuclear@9: 	glFrontFace(GL_CCW);
nuclear@9: }
nuclear@9: 
nuclear@13: static void draw_squares()
nuclear@13: {
nuclear@14: 	static const int num_sq = 8;
nuclear@13: 
nuclear@13: 	glPushAttrib(GL_ENABLE_BIT | GL_LINE_BIT);
nuclear@13: 	glDisable(GL_LIGHTING);
nuclear@13: 
nuclear@13: 	glMatrixMode(GL_MODELVIEW);
nuclear@13: 	glPushMatrix();
nuclear@13: 	glTranslatef(0, 1, 0);
nuclear@13: 
nuclear@13: 
nuclear@14: 	glLineWidth(2.0);
nuclear@13: 	glColor3f(1.0, 0.7, 0.2);
nuclear@13: 
nuclear@13: 	float zdist = 2.0;
nuclear@13: 	for(int i=0; i<num_sq; i++) {
nuclear@13: 		glBegin(GL_LINE_LOOP);
nuclear@13: 		glVertex3f(-1, -1, -zdist);
nuclear@13: 		glVertex3f(1, -1, -zdist);
nuclear@13: 		glVertex3f(1, 1, -zdist);
nuclear@13: 		glVertex3f(-1, 1, -zdist);
nuclear@13: 		glEnd();
nuclear@13: 
nuclear@14: 		zdist += 2.0;
nuclear@13: 	}
nuclear@13: 
nuclear@13: 	glPopMatrix();
nuclear@13: 	glPopAttrib();
nuclear@13: }
nuclear@13: 
nuclear@12: static void draw_grid(float size, float spacing)
nuclear@9: {
nuclear@9: 	int num_lines = size / spacing;
nuclear@9: 	float dist = size / 2.0;
nuclear@9: 
nuclear@9: 	glPushAttrib(GL_ENABLE_BIT | GL_LINE_BIT);
nuclear@9: 	glDisable(GL_LIGHTING);
nuclear@9: 
nuclear@9: 	glLineWidth(1.0);
nuclear@9: 
nuclear@9: 	glBegin(GL_LINES);
nuclear@9: 	glColor3f(0.4, 0.4, 0.4);
nuclear@9: 
nuclear@9: 	float x = -dist;
nuclear@9: 	for(int i=0; i<=num_lines; i++) {
nuclear@9: 		if(i != num_lines / 2) {
nuclear@9: 			glVertex3f(-dist, 0, x);
nuclear@9: 			glVertex3f(dist, 0, x);
nuclear@9: 			glVertex3f(x, 0, -dist);
nuclear@9: 			glVertex3f(x, 0, dist);
nuclear@9: 		}
nuclear@9: 		x += spacing;
nuclear@9: 	}
nuclear@9: 	glEnd();
nuclear@9: 
nuclear@9: 	glLineWidth(2.0);
nuclear@9: 
nuclear@9: 	glBegin(GL_LINES);
nuclear@9: 	glColor3f(1.0, 0, 0);
nuclear@9: 	glVertex3f(-dist, 0, 0);
nuclear@9: 	glVertex3f(dist, 0, 0);
nuclear@9: 	glColor3f(0, 1.0, 0);
nuclear@9: 	glVertex3f(0, 0, -dist);
nuclear@9: 	glVertex3f(0, 0, dist);
nuclear@9: 	glEnd();
nuclear@9: 
nuclear@9: 	glPopAttrib();
nuclear@9: }
nuclear@9: 
nuclear@0: static void idle()
nuclear@0: {
nuclear@0: 	glutPostRedisplay();
nuclear@0: }
nuclear@0: 
nuclear@0: 
nuclear@0: static void reshape(int x, int y)
nuclear@0: {
nuclear@0: 	width = x;
nuclear@0: 	height = y;
nuclear@12: 
nuclear@12: 	if(!use_vr) {
nuclear@12: 		rtarg_width = width;
nuclear@12: 		rtarg_height = height;
nuclear@12: 	}
nuclear@0: }
nuclear@0: 
nuclear@0: static void keyb(unsigned char key, int x, int y)
nuclear@0: {
nuclear@0: 	switch(key) {
nuclear@0: 	case 27:
nuclear@0: 		exit(0);
nuclear@8: 
nuclear@8: 	case 'm':
nuclear@8: 		mouselook = !mouselook;
nuclear@8: 		if(mouselook) {
nuclear@8: 			glutPassiveMotionFunc(passive);
nuclear@8: 			glutSetCursor(GLUT_CURSOR_NONE);
nuclear@8: 			glutWarpPointer(width / 2, height / 2);
nuclear@8: 		} else {
nuclear@8: 			glutPassiveMotionFunc(0);
nuclear@8: 			glutSetCursor(GLUT_CURSOR_INHERIT);
nuclear@8: 		}
nuclear@8: 		break;
nuclear@12: 
nuclear@12: 	case 'f':
nuclear@12: 		{
nuclear@12: 			static bool fullscreen;
nuclear@12: 			static int prev_xsz, prev_ysz;
nuclear@12: 
nuclear@12: 			fullscreen = !fullscreen;
nuclear@12: 
nuclear@12: 			if(fullscreen) {
nuclear@12: 				prev_xsz = width;
nuclear@12: 				prev_ysz = height;
nuclear@12: 				glutFullScreen();
nuclear@12: 			} else {
nuclear@12: 				glutReshapeWindow(prev_xsz, prev_ysz);
nuclear@12: 			}
nuclear@12: 			glutPostRedisplay();
nuclear@12: 		}
nuclear@12: 		break;
nuclear@0: 	}
nuclear@8: 
nuclear@8: 	keystate[key] = true;
nuclear@8: 	glutPostRedisplay();
nuclear@8: }
nuclear@8: 
nuclear@8: static void keyup(unsigned char key, int x, int y)
nuclear@8: {
nuclear@8: 	keystate[key] = false;
nuclear@8: 	glutPostRedisplay();
nuclear@8: }
nuclear@8: 
nuclear@8: static bool bnstate[32];
nuclear@8: static int prev_x, prev_y;
nuclear@8: 
nuclear@8: static void mouse(int bn, int st, int x, int y)
nuclear@8: {
nuclear@8: 	prev_x = x;
nuclear@8: 	prev_y = y;
nuclear@8: 	bnstate[bn - GLUT_LEFT_BUTTON] = st == GLUT_DOWN;
nuclear@8: }
nuclear@8: 
nuclear@8: static void motion(int x, int y)
nuclear@8: {
nuclear@8: 	if(mouselook) {
nuclear@8: 		// just call passive, it does what we need
nuclear@8: 		passive(x, y);
nuclear@8: 	}
nuclear@8: }
nuclear@8: 
nuclear@8: static void passive(int x, int y)
nuclear@8: {
nuclear@8: 	// no need to test mouselook; this callback is only set when mouselook is enabled
nuclear@8: 	int center_x = width / 2;
nuclear@8: 	int center_y = height / 2;
nuclear@8: 
nuclear@8: 	int dx = x - center_x;
nuclear@8: 	int dy = y - center_y;
nuclear@8: 
nuclear@8: 	if(!dx && !dy) {
nuclear@8: 		return;
nuclear@8: 	}
nuclear@8: 
nuclear@9: 	float dtheta_deg = dy * 0.1;
nuclear@9: 	float dphi_deg = dx * 0.1;
nuclear@9: 
nuclear@9: 	cam.input_rotate(DEG_TO_RAD(dtheta_deg), DEG_TO_RAD(dphi_deg), 0);
nuclear@9: 
nuclear@8: 	glutPostRedisplay();
nuclear@8: 	glutWarpPointer(center_x, center_y);
nuclear@0: }
nuclear@0: 
nuclear@0: static void sball_rotate(int rx, int ry, int rz)
nuclear@0: {
nuclear@0: }
nuclear@1: 
nuclear@1: static bool parse_args(int argc, char **argv)
nuclear@1: {
nuclear@1: 	for(int i=1; i<argc; i++) {
nuclear@1: 		if(argv[i][0] == '-') {
nuclear@1: 			if(strcmp(argv[i], "-vr") == 0) {
nuclear@1: 				use_vr = true;
nuclear@1: 			} else if(strcmp(argv[i], "-novr") == 0) {
nuclear@1: 				use_vr = false;
nuclear@1: 			} else {
nuclear@1: 				fprintf(stderr, "invalid option: %s\n", argv[i]);
nuclear@1: 				return false;
nuclear@1: 			}
nuclear@1: 		} else {
nuclear@1: 			fprintf(stderr, "unexpected argument: %s\n", argv[i]);
nuclear@1: 			return false;
nuclear@1: 		}
nuclear@1: 	}
nuclear@1: 	return true;
nuclear@1: }