nuclear@0: #include <stdio.h>
nuclear@0: #include <assert.h>
nuclear@0: #include "opengl.h"
nuclear@0: #include "game.h"
nuclear@0: #include "sdr.h"
nuclear@0: #include "shader.h"
nuclear@0: #include "shadow.h"
nuclear@0: #include "opt.h"
nuclear@0: 
nuclear@2: #include "room.h"
nuclear@2: 
nuclear@0: static void draw_scene();
nuclear@0: 
nuclear@0: int win_width, win_height;
nuclear@0: unsigned long cur_time;
nuclear@0: bool dbg_wireframe;
nuclear@0: int dbg_int;
nuclear@0: 
nuclear@0: unsigned int sdr_shadow, sdr_shadow_notex;
nuclear@0: 
nuclear@0: static float cam_theta, cam_phi = 25, cam_dist = 8;
nuclear@0: static bool bnstate[8];
nuclear@0: static int prev_x, prev_y;
nuclear@0: 
nuclear@0: static unsigned int modkeys;
nuclear@0: 
nuclear@0: 
nuclear@0: bool game_init()
nuclear@0: {
nuclear@0: 	if(init_opengl() == -1) {
nuclear@0: 		return false;
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	glEnable(GL_DEPTH_TEST);
nuclear@0: 	glEnable(GL_CULL_FACE);
nuclear@0: 	glEnable(GL_NORMALIZE);
nuclear@0: 	glEnable(GL_LIGHTING);
nuclear@0: 	glEnable(GL_LIGHT0);
nuclear@0: 
nuclear@2: 	float amb[] = {0.1, 0.1, 0.1, 1.0};
nuclear@0: 	glLightModelfv(GL_LIGHT_MODEL_AMBIENT, amb);
nuclear@0: 
nuclear@0: 	if(glcaps.sep_spec) {
nuclear@0: 		glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);
nuclear@0: 	}
nuclear@0: 	glEnable(GL_MULTISAMPLE);
nuclear@0: 
nuclear@0: 	if(!init_shadow(4096)) {
nuclear@0: 		fprintf(stderr, "failed to initialize shadowmaps\n");
nuclear@0: 		return false;
nuclear@0: 	}
nuclear@0: 	if(!(sdr_shadow = create_program_load("sdr/shadow.v.glsl", "sdr/shadow.p.glsl"))) {
nuclear@0: 		return false;
nuclear@0: 	}
nuclear@0: 	set_uniform_int(sdr_shadow, "tex", 0);
nuclear@0: 	set_uniform_int(sdr_shadow, "shadowmap", 1);
nuclear@0: 
nuclear@0: 	if(!(sdr_shadow_notex = create_program_load("sdr/shadow.v.glsl", "sdr/shadow-notex.p.glsl"))) {
nuclear@0: 		return false;
nuclear@0: 	}
nuclear@0: 	set_uniform_int(sdr_shadow_notex, "shadowmap", 1);
nuclear@0: 
nuclear@2: 	if(!init_room()) {
nuclear@2: 		return false;
nuclear@2: 	}
nuclear@0: 
nuclear@0: 	assert(glGetError() == GL_NO_ERROR);
nuclear@0: 	return true;
nuclear@0: }
nuclear@0: 
nuclear@0: void game_cleanup()
nuclear@0: {
nuclear@2: 	cleanup_room();
nuclear@0: }
nuclear@0: 
nuclear@0: void game_update(unsigned long time_msec)
nuclear@0: {
nuclear@0: 	cur_time = time_msec;
nuclear@0: }
nuclear@0: 
nuclear@0: void game_display()
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, 0.1, -cam_dist);
nuclear@0: 	glRotatef(cam_phi, 1, 0, 0);
nuclear@0: 	glRotatef(cam_theta, 0, 1, 0);
nuclear@0: 
nuclear@2: 	float lpos[] = {-0, 0, 0, 1};
nuclear@0: 	glLightfv(GL_LIGHT0, GL_POSITION, lpos);
nuclear@0: 
nuclear@2: 	opt.shadows = false;
nuclear@0: 	if(opt.shadows && sdr_shadow) {
nuclear@0: 		begin_shadow_pass(Vector3(lpos[0], lpos[1], lpos[2]), Vector3(0, 0, 0), 5);
nuclear@0: 		draw_scene();
nuclear@0: 		end_shadow_pass();
nuclear@0: 
nuclear@0: 		glActiveTexture(GL_TEXTURE1);
nuclear@0: 		glBindTexture(GL_TEXTURE_2D, get_shadow_tex());
nuclear@0: 
nuclear@0: 		glMatrixMode(GL_TEXTURE);
nuclear@0: 		Matrix4x4 shadow_matrix = get_shadow_matrix();
nuclear@0: 		glLoadTransposeMatrixf(shadow_matrix[0]);
nuclear@0: 
nuclear@0: 		glActiveTexture(GL_TEXTURE0);
nuclear@0: 		glMatrixMode(GL_MODELVIEW);
nuclear@0: 
nuclear@2: 		override_shader(sdr_shadow_notex);
nuclear@0: 
nuclear@0: 		draw_scene();
nuclear@0: 
nuclear@0: 		glActiveTexture(GL_TEXTURE1);
nuclear@0: 		glBindTexture(GL_TEXTURE_2D, 0);
nuclear@0: 		glActiveTexture(GL_TEXTURE0);
nuclear@0: 		glBindTexture(GL_TEXTURE_2D, 0);
nuclear@0: 	} else {
nuclear@2: 		override_shader(sdr_shadow_notex);
nuclear@0: 		draw_scene();
nuclear@0: 	}
nuclear@0: }
nuclear@0: 
nuclear@0: static void glmaterial(float r, float g, float b, float spec, float shin)
nuclear@0: {
nuclear@0: 	float color[] = {r, g, b, 1};
nuclear@0: 	float scolor[] = {spec, spec, spec, 1};
nuclear@0: 	glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, color);
nuclear@0: 	glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, scolor);
nuclear@0: 	glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, shin);
nuclear@0: }
nuclear@0: 
nuclear@0: static void draw_scene()
nuclear@0: {
nuclear@2: 	draw_room();
nuclear@2: 
nuclear@0: 	glPushMatrix();
nuclear@2: 	glTranslatef(0, 0.75, 0);
nuclear@0: 
nuclear@0: 	glmaterial(0.2, 0.3, 1.0, 0.8, 60.0);
nuclear@0: 	draw_teapot();
nuclear@2: 
nuclear@2: 	glPopMatrix();
nuclear@0: }
nuclear@0: 
nuclear@0: 
nuclear@0: void game_reshape(int x, int y)
nuclear@0: {
nuclear@0: 	glMatrixMode(GL_PROJECTION);
nuclear@0: 	glLoadIdentity();
nuclear@0: 	gluPerspective(45, (float)x / (float)y, 0.2, 200.0);
nuclear@0: 
nuclear@0: 	glViewport(0, 0, x, y);
nuclear@0: }
nuclear@0: 
nuclear@0: void game_keyboard(int bn, bool press)
nuclear@0: {
nuclear@0: 	if(press) {
nuclear@0: 		switch(bn) {
nuclear@0: 		case 27:
nuclear@0: 			quit();
nuclear@0: 
nuclear@0: 		case 'w':
nuclear@0: 			dbg_wireframe = !dbg_wireframe;
nuclear@0: 			redisplay();
nuclear@0: 			break;
nuclear@0: 
nuclear@0: 		case 's':
nuclear@0: 			opt.shadows = !opt.shadows;
nuclear@0: 			redisplay();
nuclear@0: 			break;
nuclear@0: 		}
nuclear@0: 	}
nuclear@0: }
nuclear@0: 
nuclear@0: void game_modifier_key(int key, bool press)
nuclear@0: {
nuclear@0: 	if(press) {
nuclear@0: 		modkeys |= (1 << key);
nuclear@0: 	} else {
nuclear@0: 		modkeys &= ~(1 << key);
nuclear@0: 	}
nuclear@0: }
nuclear@0: 
nuclear@0: void game_mbutton(int bn, bool press, int x, int y)
nuclear@0: {
nuclear@0: 	bnstate[bn] = press;
nuclear@0: 	prev_x = x;
nuclear@0: 	prev_y = y;
nuclear@0: 
nuclear@0: 	if(modkeys) {
nuclear@0: 		return;
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	if(bn == 0) {
nuclear@0: 	}
nuclear@0: }
nuclear@0: 
nuclear@0: void game_mmotion(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(modkeys) {
nuclear@0: 		if(bnstate[0]) {
nuclear@0: 			cam_theta += dx * 0.5;
nuclear@0: 			cam_phi += dy * 0.5;
nuclear@0: 
nuclear@0: 			if(cam_phi < -90) cam_phi = -90;
nuclear@0: 			if(cam_phi > 90) cam_phi = 90;
nuclear@0: 		}
nuclear@0: 		if(bnstate[2]) {
nuclear@0: 			cam_dist += dy * 0.1;
nuclear@0: 			if(cam_dist < 0.0) cam_dist = 0.0;
nuclear@0: 		}
nuclear@0: 	}
nuclear@0: }