nuclear@0: #include <stdio.h>
nuclear@18: #include <assert.h>
nuclear@16: #include "opengl.h"
nuclear@0: #include "game.h"
nuclear@1: #include "board.h"
nuclear@14: #include "scenery.h"
nuclear@15: #include "sdr.h"
nuclear@18: #include "shadow.h"
nuclear@18: #include "opt.h"
nuclear@0: 
nuclear@18: static void draw_scene();
nuclear@0: static void draw_backdrop();
nuclear@0: 
nuclear@0: int win_width, win_height;
nuclear@17: unsigned long cur_time;
nuclear@15: unsigned int sdr_phong, sdr_phong_notex;
nuclear@18: unsigned int sdr_shadow, sdr_shadow_notex;
nuclear@19: unsigned int sdr_unlit;
nuclear@14: bool wireframe;
nuclear@0: 
nuclear@1: static Board board;
nuclear@1: 
nuclear@8: static float cam_theta, cam_phi = 45, cam_dist = 3;
nuclear@0: static bool bnstate[8];
nuclear@0: static int prev_x, prev_y;
nuclear@0: 
nuclear@19: static bool dbg_busyloop, dbg_show_shadowmap;
nuclear@0: 
nuclear@0: bool game_init()
nuclear@0: {
nuclear@16: 	if(init_opengl() == -1) {
nuclear@16: 		return false;
nuclear@16: 	}
nuclear@16: 
nuclear@0: 	glEnable(GL_DEPTH_TEST);
nuclear@0: 	glEnable(GL_CULL_FACE);
nuclear@11: 	glEnable(GL_NORMALIZE);
nuclear@0: 	glEnable(GL_LIGHTING);
nuclear@0: 	glEnable(GL_LIGHT0);
nuclear@0: 
nuclear@19: 	float amb[] = {0.3, 0.3, 0.3, 1.0};
nuclear@19: 	glLightModelfv(GL_LIGHT_MODEL_AMBIENT, amb);
nuclear@19: 
nuclear@16: 	if(glcaps.sep_spec) {
nuclear@16: 		glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);
nuclear@16: 	}
nuclear@16: 
nuclear@16: 	if(glcaps.fsaa) {
nuclear@5: 		glEnable(GL_MULTISAMPLE);
nuclear@5: 	}
nuclear@5: 
nuclear@16: 	if(glcaps.shaders) {
nuclear@16: 		Mesh::use_custom_sdr_attr = false;
nuclear@16: 		if(!(sdr_phong = create_program_load("sdr/phong.v.glsl", "sdr/phong.p.glsl"))) {
nuclear@16: 			return false;
nuclear@16: 		}
nuclear@16: 		if(!(sdr_phong_notex = create_program_load("sdr/phong.v.glsl", "sdr/phong-notex.p.glsl"))) {
nuclear@16: 			return false;
nuclear@16: 		}
nuclear@18: 
nuclear@18: 		if(glcaps.fbo) {
nuclear@19: 			init_shadow(2048);
nuclear@18: 
nuclear@18: 			if(!(sdr_shadow = create_program_load("sdr/shadow.v.glsl", "sdr/shadow.p.glsl"))) {
nuclear@18: 				return false;
nuclear@18: 			}
nuclear@18: 			set_uniform_int(sdr_shadow, "tex", 0);
nuclear@18: 			set_uniform_int(sdr_shadow, "shadowmap", 1);
nuclear@18: 
nuclear@18: 			if(!(sdr_shadow_notex = create_program_load("sdr/shadow.v.glsl", "sdr/shadow-notex.p.glsl"))) {
nuclear@18: 				return false;
nuclear@18: 			}
nuclear@19: 			set_uniform_int(sdr_shadow_notex, "shadowmap", 1);
nuclear@18: 		}
nuclear@15: 	}
nuclear@15: 
nuclear@1: 	if(!board.init()) {
nuclear@1: 		return false;
nuclear@1: 	}
nuclear@17: 	board.setup();
nuclear@1: 
nuclear@14: 	if(!init_scenery()) {
nuclear@14: 		return false;
nuclear@14: 	}
nuclear@14: 
nuclear@18: 	assert(glGetError() == GL_NO_ERROR);
nuclear@0: 	return true;
nuclear@0: }
nuclear@0: 
nuclear@0: void game_cleanup()
nuclear@0: {
nuclear@1: 	board.destroy();
nuclear@14: 	destroy_scenery();
nuclear@18: 	destroy_shadow();
nuclear@0: }
nuclear@0: 
nuclear@0: void game_update(unsigned long time_msec)
nuclear@0: {
nuclear@17: 	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@20: 	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@19: 	float lpos[] = {-10, 20, 10, 1};
nuclear@19: 	glLightfv(GL_LIGHT0, GL_POSITION, lpos);
nuclear@6: 
nuclear@18: 	if(opt.shadows && sdr_shadow) {
nuclear@19: 		begin_shadow_pass(Vector3(lpos[0], lpos[1], lpos[2]), Vector3(0, 0, 0), 4.5);
nuclear@18: 		draw_scene();
nuclear@18: 		end_shadow_pass();
nuclear@18: 
nuclear@18: 		glActiveTexture(GL_TEXTURE1);
nuclear@18: 		glBindTexture(GL_TEXTURE_2D, get_shadow_tex());
nuclear@18: 
nuclear@18: 		glMatrixMode(GL_TEXTURE);
nuclear@18: 		Matrix4x4 shadow_matrix = get_shadow_matrix();
nuclear@19: 		glLoadTransposeMatrixf(shadow_matrix[0]);
nuclear@18: 
nuclear@18: 		glActiveTexture(GL_TEXTURE0);
nuclear@18: 		glMatrixMode(GL_MODELVIEW);
nuclear@18: 
nuclear@18: 		draw_scene();
nuclear@18: 
nuclear@18: 		glActiveTexture(GL_TEXTURE1);
nuclear@18: 		glBindTexture(GL_TEXTURE_2D, 0);
nuclear@18: 		glActiveTexture(GL_TEXTURE0);
nuclear@19: 		glBindTexture(GL_TEXTURE_2D, 0);
nuclear@18: 	} else {
nuclear@18: 		draw_scene();
nuclear@18: 	}
nuclear@15: 
nuclear@19: 	if(dbg_show_shadowmap) {
nuclear@19: 		glMatrixMode(GL_PROJECTION);
nuclear@19: 		glPushMatrix();
nuclear@19: 		glLoadIdentity();
nuclear@19: 		glMatrixMode(GL_MODELVIEW);
nuclear@19: 		glPushMatrix();
nuclear@19: 		glLoadIdentity();
nuclear@19: 		glMatrixMode(GL_TEXTURE);
nuclear@19: 		glLoadIdentity();
nuclear@19: 
nuclear@19: 		glPushAttrib(GL_ENABLE_BIT);
nuclear@19: 		glUseProgram(0);
nuclear@19: 		glBindTexture(GL_TEXTURE_2D, get_shadow_tex());
nuclear@19: 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE, GL_NONE);
nuclear@19: 		glEnable(GL_TEXTURE_2D);
nuclear@19: 		glDisable(GL_DEPTH_TEST);
nuclear@19: 		glDisable(GL_LIGHTING);
nuclear@19: 		glDisable(GL_BLEND);
nuclear@19: 
nuclear@19: 		glBegin(GL_QUADS);
nuclear@19: 		glColor4f(1, 1, 1, 1);
nuclear@19: 		glTexCoord2f(0, 0); glVertex2f(-1, -1);
nuclear@19: 		glTexCoord2f(1, 0); glVertex2f(1, -1);
nuclear@19: 		glTexCoord2f(1, 1); glVertex2f(1, 1);
nuclear@19: 		glTexCoord2f(0, 1); glVertex2f(-1, 1);
nuclear@19: 		glEnd();
nuclear@19: 
nuclear@19: 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_R_TO_TEXTURE);
nuclear@19: 		glBindTexture(GL_TEXTURE_2D, 0);
nuclear@19: 
nuclear@19: 		glPopAttrib();
nuclear@19: 
nuclear@19: 		glMatrixMode(GL_PROJECTION);
nuclear@19: 		glPopMatrix();
nuclear@19: 		glMatrixMode(GL_MODELVIEW);
nuclear@19: 		glPopMatrix();
nuclear@19: 	}
nuclear@19: 
nuclear@15: 	if(dbg_busyloop) {
nuclear@15: 		redisplay();
nuclear@15: 	}
nuclear@0: }
nuclear@0: 
nuclear@18: static void draw_scene()
nuclear@18: {
nuclear@18: 	draw_backdrop();
nuclear@18: 	draw_scenery();
nuclear@18: 	board.draw();
nuclear@18: }
nuclear@18: 
nuclear@0: static void draw_backdrop()
nuclear@0: {
nuclear@0: 	glPushAttrib(GL_ENABLE_BIT);
nuclear@0: 	glDisable(GL_LIGHTING);
nuclear@0: 	glDisable(GL_DEPTH_TEST);
nuclear@0: 
nuclear@0: 	glMatrixMode(GL_PROJECTION);
nuclear@0: 	glPushMatrix();
nuclear@0: 	glLoadIdentity();
nuclear@0: 	glMatrixMode(GL_MODELVIEW);
nuclear@0: 	glPushMatrix();
nuclear@0: 	glLoadIdentity();
nuclear@0: 
nuclear@0: 	glBegin(GL_QUADS);
nuclear@0: 	glColor3f(0.9, 0.8, 0.6);
nuclear@0: 	glVertex2f(-1, -1);
nuclear@0: 	glVertex2f(1, -1);
nuclear@0: 	glColor3f(0.4, 0.5, 0.8);
nuclear@0: 	glVertex2f(1, 1);
nuclear@0: 	glVertex2f(-1, 1);
nuclear@0: 	glEnd();
nuclear@0: 
nuclear@0: 	glMatrixMode(GL_PROJECTION);
nuclear@0: 	glPopMatrix();
nuclear@0: 	glMatrixMode(GL_MODELVIEW);
nuclear@0: 	glPopMatrix();
nuclear@0: 
nuclear@0: 	glPopAttrib();
nuclear@0: }
nuclear@0: 
nuclear@0: void game_reshape(int x, int y)
nuclear@0: {
nuclear@0: 	glMatrixMode(GL_PROJECTION);
nuclear@0: 	glLoadIdentity();
nuclear@5: 	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@14: 
nuclear@14: 		case 'w':
nuclear@14: 			wireframe = !wireframe;
nuclear@14: 			redisplay();
nuclear@14: 			break;
nuclear@15: 
nuclear@15: 		case 'd':
nuclear@15: 			dbg_busyloop = !dbg_busyloop;
nuclear@15: 			redisplay();
nuclear@15: 			break;
nuclear@18: 
nuclear@19: 		case 'D':
nuclear@19: 			dbg_show_shadowmap = !dbg_show_shadowmap;
nuclear@19: 			redisplay();
nuclear@19: 			break;
nuclear@19: 
nuclear@18: 		case 's':
nuclear@18: 			opt.shadows = !opt.shadows;
nuclear@18: 			redisplay();
nuclear@18: 			break;
nuclear@0: 		}
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: 
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(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: 		redisplay();
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: 		redisplay();
nuclear@0: 	}
nuclear@0: }