nuclear@0: #include <stdio.h>
nuclear@0: #include <stdlib.h>
nuclear@0: #include <math.h>
nuclear@0: #include <assert.h>
nuclear@0: #include "opengl.h"
nuclear@0: #include "player.h"
nuclear@0: #include "level.h"
nuclear@0: #include "noise.h"
nuclear@0: #include "texture.h"
nuclear@0: #include "mesh.h"
nuclear@0: 
nuclear@0: #define PLAYER_EYE_HEIGHT	1.65
nuclear@0: 
nuclear@0: static int init(void);
nuclear@0: static void update(unsigned int msec);
nuclear@0: static void display(void);
nuclear@0: static void draw_scene(unsigned int msec);
nuclear@0: static void idle(void);
nuclear@0: static void reshape(int x, int y);
nuclear@0: static void key_down(unsigned char key, int x, int y);
nuclear@0: static void key_up(unsigned char key, int x, int y);
nuclear@0: static void mouse(int bn, int state, int x, int y);
nuclear@0: static void motion(int x, int y);
nuclear@0: 
nuclear@0: static int win_width, win_height;
nuclear@0: static struct level level;
nuclear@0: static struct player player;
nuclear@0: static int mouselook, freelook = 1;
nuclear@0: static char keystate[256];
nuclear@0: 
nuclear@0: static struct mesh *monkey_mesh;
nuclear@0: static unsigned int envmap;
nuclear@0: static unsigned int win_tex;
nuclear@0: 
nuclear@0: static int game_won;
nuclear@0: 
nuclear@0: static float dbg_cam_dist = 0.0;
nuclear@0: 
nuclear@0: int main(int argc, char **argv)
nuclear@0: {
nuclear@0: 	glutInit(&argc, argv);
nuclear@0: 	glutInitWindowSize(1280, 800);
nuclear@0: 	glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
nuclear@0: 	glutCreateWindow("labyrinth game example");
nuclear@0: 
nuclear@0: 	glutDisplayFunc(display);
nuclear@0: 	glutIdleFunc(idle);
nuclear@0: 	glutReshapeFunc(reshape);
nuclear@0: 	glutKeyboardFunc(key_down);
nuclear@0: 	glutKeyboardUpFunc(key_up);
nuclear@0: 	glutMouseFunc(mouse);
nuclear@0: 	glutMotionFunc(motion);
nuclear@0: 
nuclear@0: 	if(init() == -1) {
nuclear@0: 		return 1;
nuclear@0: 	}
nuclear@0: 	glutMainLoop();
nuclear@0: 	return 0;
nuclear@0: }
nuclear@0: 
nuclear@0: 
nuclear@0: static int init(void)
nuclear@0: {
nuclear@0: 	glEnable(GL_DEPTH_TEST);
nuclear@0: 	glEnable(GL_CULL_FACE);
nuclear@0: 	glEnable(GL_LIGHTING);
nuclear@0: 	glEnable(GL_NORMALIZE);
nuclear@0: 
nuclear@0: 	glEnable(GL_LIGHT0);
nuclear@0: 	glEnable(GL_LIGHT1);
nuclear@0: 
nuclear@0: 	/* set a slightly bluish cold ambient light */
nuclear@0: 	{
nuclear@0: 		float ambient[] = {0.08, 0.1, 0.3, 1.0};
nuclear@0: 		glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient);
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	level_init(&level);
nuclear@0: 	if(level_load(&level, "data/0.level") == -1) {
nuclear@0: 		fprintf(stderr, "level loading failed\n");
nuclear@0: 		return -1;
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	if(!(level.wall_tex = load_texture("data/wall.ppm"))) {
nuclear@0: 		return -1;
nuclear@0: 	}
nuclear@0: 	if(!(level.floor_tex = load_texture("data/floor.ppm"))) {
nuclear@0: 		return -1;
nuclear@0: 	}
nuclear@0: 	level.floor_tex_scale = 1.0;
nuclear@0: 	if(!(level.ceil_tex = load_texture("data/ceil.ppm"))) {
nuclear@0: 		return -1;
nuclear@0: 	}
nuclear@0: 	level.ceil_tex_scale = 2.0;
nuclear@0: 
nuclear@0: 
nuclear@0: 	if(!(monkey_mesh = load_mesh("data/monkey.obj"))) {
nuclear@0: 		return -1;
nuclear@0: 	}
nuclear@0: 	if(!(envmap = load_texture("data/refmap.ppm"))) {
nuclear@0: 		return -1;
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	if(!(win_tex = load_texture("data/done.ppm"))) {
nuclear@0: 		return -1;
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	player_init(&player, &level);
nuclear@0: 	return 0;
nuclear@0: }
nuclear@0: 
nuclear@0: static void update(unsigned int msec)
nuclear@0: {
nuclear@0: 	static unsigned int prev_upd;
nuclear@0: 	float dfwd = 0.0f;
nuclear@0: 	float dright = 0.0f;
nuclear@0: 	float walk_speed = 8.0;
nuclear@0: 
nuclear@0: 	float dt = (float)(msec - prev_upd) / 1000.0f;
nuclear@0: 	prev_upd = msec;
nuclear@0: 
nuclear@0: 	if(game_won) return;
nuclear@0: 
nuclear@0: 	if(freelook) {
nuclear@0: 		if(keystate['w'] || keystate['W']) {
nuclear@0: 			dfwd += walk_speed * dt;
nuclear@0: 		}
nuclear@0: 		if(keystate['s'] || keystate['S']) {
nuclear@0: 			dfwd -= walk_speed * dt;
nuclear@0: 		}
nuclear@0: 		if(keystate['d'] || keystate['D']) {
nuclear@0: 			dright += walk_speed * dt * 0.6;
nuclear@0: 		}
nuclear@0: 		if(keystate['a'] || keystate['A']) {
nuclear@0: 			dright -= walk_speed * dt * 0.6;
nuclear@0: 		}
nuclear@0: 
nuclear@0: 		player_move(&player, dfwd, dright);
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	if(level_cell_at(&level, player.x, player.y) == 'x') {
nuclear@0: 		game_won = 1;
nuclear@0: 	}
nuclear@0: }
nuclear@0: 
nuclear@0: static void display(void)
nuclear@0: {
nuclear@0: 	float flicker = 1.0f;
nuclear@0: 	unsigned int msec = glutGet(GLUT_ELAPSED_TIME);
nuclear@0: 
nuclear@0: 	update(msec);
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: 	glTranslatef(0, 0, -dbg_cam_dist);
nuclear@0: 	/* set view matrix according to player pos/rot */
nuclear@0: 	player_setup_view_matrix(&player);
nuclear@0: 	glTranslatef(0, -PLAYER_EYE_HEIGHT, 0);
nuclear@0: 
nuclear@0: 	/* setup lights */
nuclear@0: 	flicker = fbm1((float)msec / 500.0f, 2) * 0.4 + 0.6;
nuclear@0: 	set_light_position(0, player.x, PLAYER_EYE_HEIGHT + 0.2, player.y);
nuclear@0: 	set_light_color(0, 1.0 * flicker, 0.6 * flicker, 0.3 * flicker);
nuclear@0: 	set_light_attenuation(0, 0.5, 0, 0.04);
nuclear@0: 
nuclear@0: 	set_light_position(1, level.goal_pos[0], 0.8, level.goal_pos[1]);
nuclear@0: 	set_light_color(1, 0.955, 0.75, 0.06);
nuclear@0: 	set_light_attenuation(1, 0.9, 0, 0.05);
nuclear@0: 
nuclear@0: 	/* draw the scene */
nuclear@0: 	draw_scene(msec);
nuclear@0: 
nuclear@0: 	glutSwapBuffers();
nuclear@0: 	assert(glGetError() == GL_NO_ERROR);
nuclear@0: }
nuclear@0: 
nuclear@0: static void draw_scene(unsigned int msec)
nuclear@0: {
nuclear@0: 	float x, y;
nuclear@0: 	float tsec = (float)msec / 1000.0f;
nuclear@0: 
nuclear@0: 	level_draw(&level);
nuclear@0: 
nuclear@0: 	/* draw the golden monkey */
nuclear@0: 	if(level_obj_pos(&level, 'x', &x, &y)) {
nuclear@0: 		glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
nuclear@0: 		glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
nuclear@0: 		glEnable(GL_TEXTURE_GEN_S);
nuclear@0: 		glEnable(GL_TEXTURE_GEN_T);
nuclear@0: 
nuclear@0: 		glBindTexture(GL_TEXTURE_2D, envmap);
nuclear@0: 		glEnable(GL_TEXTURE_2D);
nuclear@0: 
nuclear@0: 		set_mtl_diffuse(0.1, 0.1, 0.1, 1);
nuclear@0: 		set_mtl_specular(0.955, 0.75, 0.06);
nuclear@0: 		set_mtl_shininess(80.0);
nuclear@0: 		set_mtl_emission(0.955, 0.75 * 0.7, 0.06 * 0.1);
nuclear@0: 
nuclear@0: 		glMatrixMode(GL_MODELVIEW);
nuclear@0: 		glPushMatrix();
nuclear@0: 		glTranslatef(x, 0.8 + sin(tsec * 2.0) * 0.1, y);
nuclear@0: 		glRotatef(tsec * 100.0, 0, 1, 0);
nuclear@0: 		glRotatef(sin(tsec * 3.0) * 10.0, 1, 0, 0);
nuclear@0: 		glScalef(0.3, 0.3, 0.3);
nuclear@0: 
nuclear@0: 		render_mesh(monkey_mesh);
nuclear@0: 
nuclear@0: 		glPopMatrix();
nuclear@0: 
nuclear@0: 		set_mtl_emission(0, 0, 0);
nuclear@0: 
nuclear@0: 		glDisable(GL_TEXTURE_2D);
nuclear@0: 
nuclear@0: 		glDisable(GL_TEXTURE_GEN_S);
nuclear@0: 		glDisable(GL_TEXTURE_GEN_T);
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	/* draw the win text */
nuclear@0: 	if(game_won) {
nuclear@0: 		glMatrixMode(GL_MODELVIEW);
nuclear@0: 		glPushMatrix();
nuclear@0: 		glLoadIdentity();
nuclear@0: 		glMatrixMode(GL_PROJECTION);
nuclear@0: 		glPushMatrix();
nuclear@0: 		glLoadIdentity();
nuclear@0: 		glScalef((float)win_height / (float)win_width, 1, 1);
nuclear@0: 
nuclear@0: 		glBindTexture(GL_TEXTURE_2D, win_tex);
nuclear@0: 		glEnable(GL_TEXTURE_2D);
nuclear@0: 
nuclear@0: 		glEnable(GL_BLEND);
nuclear@0: 		glBlendFunc(GL_ONE, GL_ONE);
nuclear@0: 		glDisable(GL_LIGHTING);
nuclear@0: 
nuclear@0: 		glBegin(GL_QUADS);
nuclear@0: 		glTexCoord2f(0, 1); glVertex2f(-1, -1);
nuclear@0: 		glTexCoord2f(1, 1); glVertex2f(1, -1);
nuclear@0: 		glTexCoord2f(1, 0); glVertex2f(1, 1);
nuclear@0: 		glTexCoord2f(0, 0); glVertex2f(-1, 1);
nuclear@0: 		glEnd();
nuclear@0: 
nuclear@0: 		glDisable(GL_BLEND);
nuclear@0: 		glDisable(GL_TEXTURE_2D);
nuclear@0: 		glEnable(GL_LIGHTING);
nuclear@0: 
nuclear@0: 		glPopMatrix();
nuclear@0: 		glMatrixMode(GL_MODELVIEW);
nuclear@0: 		glPopMatrix();
nuclear@0: 	}
nuclear@0: }
nuclear@0: 
nuclear@0: static void idle(void)
nuclear@0: {
nuclear@0: 	glutPostRedisplay();
nuclear@0: }
nuclear@0: 
nuclear@0: static void reshape(int x, int y)
nuclear@0: {
nuclear@0: 	win_width = x;
nuclear@0: 	win_height = y;
nuclear@0: 	glViewport(0, 0, x, y);
nuclear@0: 	glMatrixMode(GL_PROJECTION);
nuclear@0: 	glLoadIdentity();
nuclear@0: 	gluPerspective(50.0, (float)x / (float)y, 0.5, 500.0);
nuclear@0: }
nuclear@0: 
nuclear@0: static int warping_mouse;
nuclear@0: 
nuclear@0: static void key_down(unsigned char key, int x, int y)
nuclear@0: {
nuclear@0: 	keystate[key] = 1;
nuclear@0: 
nuclear@0: 	switch(key) {
nuclear@0: 	case 27:
nuclear@0: 		exit(0);
nuclear@0: 
nuclear@0: 	case 'a':
nuclear@0: 		if(!freelook && !game_won) {
nuclear@0: 			player_turn(&player, -90, 0);
nuclear@0: 		}
nuclear@0: 		break;
nuclear@0: 
nuclear@0: 	case 'd':
nuclear@0: 		if(!freelook && !game_won) {
nuclear@0: 			player_turn(&player, 90, 0);
nuclear@0: 		}
nuclear@0: 		break;
nuclear@0: 
nuclear@0: 	case 'w':
nuclear@0: 	case 's':
nuclear@0: 		if(!freelook && !game_won) {
nuclear@0: 			float prev_x = player.x;
nuclear@0: 			float prev_y = player.y;
nuclear@0: 			float sign = key == 'w' ? 1.0 : -1.0;
nuclear@0: 
nuclear@0: 			if(!player_move(&player, level.cell_size * sign, 0)) {
nuclear@0: 				player.x = prev_x;
nuclear@0: 				player.y = prev_y;
nuclear@0: 			}
nuclear@0: 		}
nuclear@0: 		break;
nuclear@0: 
nuclear@0: 	case '`':
nuclear@0: 	case '~':
nuclear@0: 		mouselook = !mouselook;
nuclear@0: 		if(mouselook) {
nuclear@0: 			warping_mouse = 1;
nuclear@0: 			glutWarpPointer(win_width / 2, win_height / 2);
nuclear@0: 			glutPassiveMotionFunc(motion);
nuclear@0: 			glutSetCursor(GLUT_CURSOR_NONE);
nuclear@0: 		} else {
nuclear@0: 			glutPassiveMotionFunc(0);
nuclear@0: 			glutSetCursor(GLUT_CURSOR_INHERIT);
nuclear@0: 		}
nuclear@0: 		break;
nuclear@0: 
nuclear@0: 	case 'b':
nuclear@0: 	case 'B':
nuclear@0: 		freelook = !freelook;
nuclear@0: 		break;
nuclear@0: 
nuclear@0: 	case 'r':
nuclear@0: 	case 'R':
nuclear@0: 		game_won = 0;
nuclear@0: 		player_init(&player, &level);
nuclear@0: 		break;
nuclear@0: 
nuclear@0: 	default:
nuclear@0: 		break;
nuclear@0: 	}
nuclear@0: }
nuclear@0: 
nuclear@0: static void key_up(unsigned char key, int x, int y)
nuclear@0: {
nuclear@0: 	keystate[key] = 0;
nuclear@0: }
nuclear@0: 
nuclear@0: static int bnstate[16];
nuclear@0: static int prev_x, prev_y;
nuclear@0: 
nuclear@0: static void mouse(int bn, int state, int x, int y)
nuclear@0: {
nuclear@0: 	prev_x = x;
nuclear@0: 	prev_y = y;
nuclear@0: 	bnstate[bn - GLUT_LEFT_BUTTON] = state == GLUT_DOWN ? 1 : 0;
nuclear@0: }
nuclear@0: 
nuclear@0: static void motion(int x, int y)
nuclear@0: {
nuclear@0: 	int dx, dy;
nuclear@0: 	int cx = win_width / 2;
nuclear@0: 	int cy = win_height / 2;
nuclear@0: 
nuclear@0: 	if(warping_mouse) {
nuclear@0: 		warping_mouse = 0;
nuclear@0: 		return;
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	dx = x - (mouselook ? cx : prev_x);
nuclear@0: 	dy = y - (mouselook ? cy : prev_y);
nuclear@0: 	prev_x = x;
nuclear@0: 	prev_y = y;
nuclear@0: 
nuclear@0: 	if(!dx && !dy) return;
nuclear@0: 
nuclear@0: 	if(mouselook || bnstate[0]) {
nuclear@0: 		player_turn(&player, dx * 0.5, dy * 0.5);
nuclear@0: 	}
nuclear@0: 	if(bnstate[2]) {
nuclear@0: 		dbg_cam_dist += 0.1 * dy;
nuclear@0: 		if(dbg_cam_dist < 0.0) dbg_cam_dist = 0.0;
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	if(mouselook) {
nuclear@0: 		warping_mouse = 1;
nuclear@0: 		glutWarpPointer(cx, cy);
nuclear@0: 		prev_x = cx;
nuclear@0: 		prev_y = cy;
nuclear@0: 	}
nuclear@0: }