nuclear@0: #include <stdio.h>
nuclear@0: #include <GL/glew.h>
nuclear@0: #include "game.h"
nuclear@0: 
nuclear@0: static void draw_backdrop();
nuclear@0: 
nuclear@0: int win_width, win_height;
nuclear@0: 
nuclear@0: static float cam_theta, cam_phi = 25, cam_dist = 6;
nuclear@0: static bool bnstate[8];
nuclear@0: static int prev_x, prev_y;
nuclear@0: 
nuclear@0: 
nuclear@0: bool game_init()
nuclear@0: {
nuclear@0: 	glEnable(GL_DEPTH_TEST);
nuclear@0: 	glEnable(GL_CULL_FACE);
nuclear@0: 
nuclear@0: 	glEnable(GL_LIGHTING);
nuclear@0: 	glEnable(GL_LIGHT0);
nuclear@0: 
nuclear@0: 	return true;
nuclear@0: }
nuclear@0: 
nuclear@0: void game_cleanup()
nuclear@0: {
nuclear@0: }
nuclear@0: 
nuclear@0: void game_update(unsigned long time_msec)
nuclear@0: {
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, -cam_dist);
nuclear@0: 	glRotatef(cam_phi, 1, 0, 0);
nuclear@0: 	glRotatef(cam_theta, 0, 1, 0);
nuclear@0: 
nuclear@0: 	draw_backdrop();
nuclear@0: 
nuclear@0: 	glBegin(GL_QUADS);
nuclear@0: 	glNormal3f(0, 1, 0);
nuclear@0: 	glVertex3f(-1, 0, 1);
nuclear@0: 	glVertex3f(1, 0, 1);
nuclear@0: 	glVertex3f(1, 0, -1);
nuclear@0: 	glVertex3f(-1, 0, -1);
nuclear@0: 	glEnd();
nuclear@0: }
nuclear@0: 
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@0: 	gluPerspective(50, (float)x / (float)y, 0.5, 500.0);
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: 	}
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: }