nuclear@2: #include "game.h"
nuclear@2: #include "opengl.h"
nuclear@2: #include "camera.h"
nuclear@2: #include "texture.h"
nuclear@4: #include "vr/vr.h"
nuclear@2: 
nuclear@7: static void game_render_eye(int eye);
nuclear@2: static void draw_scene();
nuclear@6: static bool setup_rtarg(int x, int y);
nuclear@6: 
nuclear@7: static Texture *rtarg;
nuclear@6: static unsigned int fbo, rtarg_depth;
nuclear@7: static int rtwidth, rtheight;
nuclear@2: 
nuclear@2: static const float move_speed = 10.0f;
nuclear@2: 
nuclear@2: static int fb_width, fb_height;
nuclear@2: static FlyCamera cam;
nuclear@2: static Texture floor_tex;
nuclear@2: static bool keystate[256];
nuclear@2: 
nuclear@2: bool game_init()
nuclear@2: {
nuclear@4: 	vr_init();
nuclear@4: 
nuclear@2: 	glEnable(GL_DEPTH_TEST);
nuclear@2: 	glEnable(GL_CULL_FACE);
nuclear@2: 	glEnable(GL_LIGHTING);
nuclear@2: 	glEnable(GL_LIGHT0);
nuclear@2: 
nuclear@2: 	glClearColor(0.1, 0.1, 0.1, 1);
nuclear@2: 
nuclear@6: 
nuclear@2: 	if(!floor_tex.load("data/tiles.png")) {
nuclear@2: 		return false;
nuclear@2: 	}
nuclear@2: 
nuclear@2: 	cam.input_move(0, 0, 5);
nuclear@2: 	return true;
nuclear@2: }
nuclear@2: 
nuclear@2: void game_cleanup()
nuclear@2: {
nuclear@2: 	floor_tex.destroy();
nuclear@4: 	vr_shutdown();
nuclear@6: 
nuclear@6: 	if(fbo) {
nuclear@6: 		glDeleteFramebuffers(1, &fbo);
nuclear@6: 		glDeleteRenderbuffers(1, &rtarg_depth);
nuclear@7: 		delete rtarg;
nuclear@6: 	}
nuclear@2: }
nuclear@2: 
nuclear@2: void game_update(unsigned int msec)
nuclear@2: {
nuclear@2: 	static unsigned int prev_msec;
nuclear@2: 	float dt = (msec - prev_msec) / 1000.0f;
nuclear@2: 	float offs = dt * move_speed;
nuclear@2: 	prev_msec = msec;
nuclear@2: 
nuclear@2: 	Vector3 move;
nuclear@2: 	float roll = 0.0f;
nuclear@2: 
nuclear@2: 	if(keystate['d'] || keystate['D']) {
nuclear@2: 		move.x += offs;
nuclear@2: 	}
nuclear@2: 	if(keystate['a'] || keystate['A']) {
nuclear@2: 		move.x -= offs;
nuclear@2: 	}
nuclear@2: 	if(keystate['s'] || keystate['S']) {
nuclear@2: 		move.z += offs;
nuclear@2: 	}
nuclear@2: 	if(keystate['w'] || keystate['W']) {
nuclear@2: 		move.z -= offs;
nuclear@2: 	}
nuclear@2: 	if(keystate['e'] || keystate['E']) {
nuclear@2: 		roll += dt;
nuclear@2: 	}
nuclear@2: 	if(keystate['q'] || keystate['Q']) {
nuclear@2: 		roll -= dt;
nuclear@2: 	}
nuclear@2: 
nuclear@2: 	cam.input_move(move.x, move.y, move.z);
nuclear@2: 	cam.input_rotate(0, 0, roll);
nuclear@2: }
nuclear@2: 
nuclear@7: void game_render()
nuclear@2: {
nuclear@7: 	glBindFramebuffer(GL_FRAMEBUFFER, fbo);
nuclear@7: 	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
nuclear@6: 
nuclear@7: 	glViewport(0, 0, rtwidth / 2.0, rtheight);
nuclear@7: 	vr_begin(VR_EYE_LEFT);
nuclear@7: 	game_render_eye(-1);
nuclear@7: 	vr_end();
nuclear@7: 
nuclear@7: 	glViewport(rtwidth / 2, 0, rtwidth / 2.0, rtheight);
nuclear@7: 	vr_begin(VR_EYE_RIGHT);
nuclear@7: 	game_render_eye(1);
nuclear@7: 	vr_end();
nuclear@7: 
nuclear@7: 	glBindFramebuffer(GL_FRAMEBUFFER, 0);
nuclear@8: 	glViewport(0, 0, fb_width, fb_height);
nuclear@8: 
nuclear@7: 	vr_output_texture(rtarg->get_texture_id(), 0, 0, (float)rtwidth / (float)rtarg->get_width(),
nuclear@7: 		(float)rtheight / (float)rtarg->get_height());
nuclear@9: 
nuclear@9: 	vr_swap_buffers();
nuclear@7: }
nuclear@7: 
nuclear@7: static void game_render_eye(int eye)
nuclear@7: {
nuclear@4: 	float mat[16];
nuclear@2: 	Matrix4x4 view_matrix = cam.get_matrix().inverse();
nuclear@2: 
nuclear@2: 	glMatrixMode(GL_PROJECTION);
nuclear@2: 	glLoadIdentity();
nuclear@11: 	if(eye == 0 || !vr_proj_matrix(eye < 0 ? 0 : 1, 0.5, 500.0, mat)) {
nuclear@4: 		gluPerspective(60.0, (float)fb_width / (float)fb_height, 0.5, 500.0);
nuclear@11: 	} else {
nuclear@7: 		glLoadMatrixf(mat);
nuclear@11: 	}
nuclear@2: 
nuclear@2: 	glMatrixMode(GL_MODELVIEW);
nuclear@11: 	if(eye == 0 || !vr_view_matrix(eye < 0 ? 0 : 1, mat)) {
nuclear@4: 		glLoadIdentity();
nuclear@11: 	} else {
nuclear@11: 		glLoadMatrixf(mat);
nuclear@11: 	}
nuclear@4: 	glMultTransposeMatrixf(view_matrix[0]);
nuclear@2: 
nuclear@2: 	draw_scene();
nuclear@2: }
nuclear@2: 
nuclear@2: void game_reshape(int x, int y)
nuclear@2: {
nuclear@2: 	glViewport(0, 0, x, y);
nuclear@2: 	fb_width = x;
nuclear@2: 	fb_height = y;
nuclear@6: 
nuclear@7: 	int lxres = vr_get_opti(VR_OPT_LEYE_XRES);
nuclear@7: 	if(lxres) {
nuclear@7: 		int lyres = vr_get_opti(VR_OPT_LEYE_YRES);
nuclear@7: 		int rxres = vr_get_opti(VR_OPT_REYE_XRES);
nuclear@7: 		int ryres = vr_get_opti(VR_OPT_REYE_YRES);
nuclear@7: 
nuclear@7: 		rtwidth = lxres + rxres;
nuclear@7: 		rtheight = lyres > ryres ? lyres : ryres;
nuclear@7: 	} else {
nuclear@7: 		rtwidth = x;
nuclear@7: 		rtheight = y;
nuclear@7: 	}
nuclear@7: 
nuclear@7: 	setup_rtarg(rtwidth, rtheight);
nuclear@2: }
nuclear@2: 
nuclear@2: void game_keyboard(int key, bool pressed, int x, int y)
nuclear@2: {
nuclear@2: 	if(pressed) {
nuclear@2: 		switch(key) {
nuclear@2: 		case 27:
nuclear@2: 			exit(0);
nuclear@9: 
nuclear@9: 		case ' ':
nuclear@9: 			vr_recenter();
nuclear@9: 			break;
nuclear@2: 		}
nuclear@2: 	}
nuclear@2: 
nuclear@2: 	if(key < 256) {
nuclear@2: 		keystate[key] = pressed;
nuclear@2: 	}
nuclear@2: }
nuclear@2: 
nuclear@2: static int prev_x, prev_y;
nuclear@2: static bool bnstate[32];
nuclear@2: 
nuclear@2: void game_mouse(int bn, bool pressed, int x, int y)
nuclear@2: {
nuclear@2: 	bnstate[bn] = pressed;
nuclear@2: 	prev_x = x;
nuclear@2: 	prev_y = y;
nuclear@2: }
nuclear@2: 
nuclear@2: void game_motion(int x, int y)
nuclear@2: {
nuclear@2: 	int dx = x - prev_x;
nuclear@2: 	int dy = y - prev_y;
nuclear@2: 	prev_x = x;
nuclear@2: 	prev_y = y;
nuclear@2: 
nuclear@2: 	if(!dx && !dy) return;
nuclear@2: 
nuclear@2: 	if(bnstate[0]) {
nuclear@2: 		float xrot = dy * 0.5;
nuclear@2: 		float yrot = dx * 0.5;
nuclear@2: 		cam.input_rotate(DEG_TO_RAD(xrot), 0, 0);
nuclear@2: 		cam.input_rotate(0, DEG_TO_RAD(yrot), 0);
nuclear@2: 	}
nuclear@2: }
nuclear@2: 
nuclear@3: void game_mwheel(int dir)
nuclear@3: {
nuclear@3: 	cam.input_move(0, dir * 0.1, 0);
nuclear@3: }
nuclear@3: 
nuclear@2: void game_6dof_move(float x, float y, float z)
nuclear@2: {
nuclear@2: 	cam.input_move(x, y, z);
nuclear@2: }
nuclear@2: 
nuclear@2: void game_6dof_rotate(float x, float y, float z)
nuclear@2: {
nuclear@2: 	cam.input_rotate(x, y, z);
nuclear@2: }
nuclear@2: 
nuclear@2: static void draw_scene()
nuclear@2: {
nuclear@2: 	glMatrixMode(GL_MODELVIEW);
nuclear@2: 	glTranslatef(0, -1.5, 0);
nuclear@2: 
nuclear@2: 	float lpos[] = {-20, 30, 10, 1};
nuclear@2: 	glLightfv(GL_LIGHT0, GL_POSITION, lpos);
nuclear@2: 
nuclear@2: 	glEnable(GL_TEXTURE_2D);
nuclear@2: 	floor_tex.bind();
nuclear@2: 
nuclear@2: 	glMatrixMode(GL_TEXTURE);
nuclear@2: 	glScalef(8, 8, 8);
nuclear@2: 
nuclear@2: 	glBegin(GL_QUADS);
nuclear@2: 	glNormal3f(0, 1, 0);
nuclear@2: 	glTexCoord2f(0, 0); glVertex3f(-25, 0, 25);
nuclear@2: 	glTexCoord2f(1, 0); glVertex3f(25, 0, 25);
nuclear@2: 	glTexCoord2f(1, 1); glVertex3f(25, 0, -25);
nuclear@2: 	glTexCoord2f(0, 1); glVertex3f(-25, 0, -25);
nuclear@2: 	glEnd();
nuclear@2: 	glDisable(GL_TEXTURE_2D);
nuclear@2: 	glLoadIdentity();
nuclear@2: 
nuclear@2: 	glMatrixMode(GL_MODELVIEW);
nuclear@2: 	glPushMatrix();
nuclear@2: 	glTranslatef(0, 0.75, 0);
nuclear@2: 
nuclear@2: 	glFrontFace(GL_CW);
nuclear@2: 	glutSolidTeapot(1.0);
nuclear@2: 	glFrontFace(GL_CCW);
nuclear@2: 
nuclear@2: 	glPopMatrix();
nuclear@2: }
nuclear@6: 
nuclear@6: static bool setup_rtarg(int x, int y)
nuclear@6: {
nuclear@6: 	int tex_width = next_pow2(x);
nuclear@6: 	int tex_height = next_pow2(y);
nuclear@6: 
nuclear@6: 	/* create render targets for each eye */
nuclear@6: 	if(!fbo) {
nuclear@6: 		glGenFramebuffers(1, &fbo);
nuclear@6: 		glGenRenderbuffers(1, &rtarg_depth);
nuclear@7: 		rtarg = new Texture;
nuclear@6: 	}
nuclear@6: 
nuclear@6: 	glBindFramebuffer(GL_FRAMEBUFFER, fbo);
nuclear@6: 
nuclear@6: 	glBindRenderbuffer(GL_RENDERBUFFER, rtarg_depth);
nuclear@6: 	glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, tex_width, tex_height);
nuclear@6: 	glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rtarg_depth);
nuclear@6: 
nuclear@7: 	rtarg->create2d(tex_width, tex_height);
nuclear@7: 	glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
nuclear@7: 		rtarg->get_texture_id(), 0);
nuclear@6: 
nuclear@6: 	if(glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
nuclear@6: 		fprintf(stderr, "incomplete framebuffer!\n");
nuclear@6: 		return false;
nuclear@6: 	}
nuclear@6: 	glBindFramebuffer(GL_FRAMEBUFFER, 0);
nuclear@7: 
nuclear@7: 	printf("created render target %dx%d (texture: %dx%d)\n", x, y, tex_width, tex_height);
nuclear@6: 	return true;
nuclear@6: }