git.mutantstargoat.com Git - deeprace/blob - src/game.c

   1 #include <stdlib.h>
   2 #include <string.h>
   3 #include <GL/gl.h>
   4 #include <GL/glu.h>
   5 #include "game.h"
   6 #include "input.h"
   7
   8 int mouse_x, mouse_y, mouse_state[3];
   9 int win_width, win_height;
  10 float win_aspect;
  11
  12 struct game_screen *cur_scr;
  13
  14 /* available screens */
  15 extern struct game_screen scr_menu, scr_game;
  16 #define MAX_SCREENS     4
  17 static struct game_screen *screens[MAX_SCREENS];
  18 static int num_screens;
  19
  20
  21 int game_init(void)
  22 {
  23         int i;
  24         char *start_scr_name;
  25
  26         /* initialize screens */
  27         screens[num_screens++] = &scr_menu;
  28         screens[num_screens++] = &scr_game;
  29
  30         start_scr_name = getenv("START_SCREEN");
  31
  32         for(i=0; i<num_screens; i++) {
  33                 if(screens[i]->init() == -1) {
  34                         return -1;
  35                 }
  36                 if(screens[i]->name && start_scr_name && strcmp(screens[i]->name, start_scr_name) == 0) {
  37                         game_chscr(screens[i]);
  38                 }
  39         }
  40         if(!cur_scr) {
  41                 game_chscr(&scr_game);  /* TODO: scr_menu */
  42         }
  43
  44         init_input();
  45
  46         glClearColor(0.1, 0.1, 0.1, 1);
  47         glEnable(GL_DEPTH_TEST);
  48         glEnable(GL_CULL_FACE);
  49         glEnable(GL_LIGHTING);
  50         glEnable(GL_LIGHT0);
  51         return 0;
  52 }
  53
  54 void game_shutdown(void)
  55 {
  56         int i;
  57
  58         for(i=0; i<num_screens; i++) {
  59                 if(screens[i]->destroy) {
  60                         screens[i]->destroy();
  61                 }
  62         }
  63 }
  64
  65 void game_display(void)
  66 {
  67         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  68
  69         cur_scr->display();
  70
  71         game_swap_buffers();
  72 }
  73
  74 void game_reshape(int x, int y)
  75 {
  76         win_width = x;
  77         win_height = y;
  78         win_aspect = (float)x / (float)y;
  79         glViewport(0, 0, x, y);
  80
  81         glMatrixMode(GL_PROJECTION);
  82         glLoadIdentity();
  83         gluPerspective(50, win_aspect, 0.5, 500);
  84
  85         if(cur_scr && cur_scr->reshape) {
  86                 cur_scr->reshape(x, y);
  87         }
  88 }
  89
  90 void game_keyboard(int key, int press)
  91 {
  92         if(press) {
  93                 switch(key) {
  94                 case 27:
  95                         game_quit();
  96                         break;
  97                 }
  98         }
  99
 100         if(cur_scr && cur_scr->keyboard) {
 101                 cur_scr->keyboard(key, press);
 102         }
 103 }
 104
 105 void game_mouse(int bn, int st, int x, int y)
 106 {
 107         mouse_x = x;
 108         mouse_y = y;
 109         if(bn < 3) {
 110                 mouse_state[bn] = st;
 111         }
 112
 113         if(cur_scr && cur_scr->mouse) {
 114                 cur_scr->mouse(bn, st, x, y);
 115         }
 116 }
 117
 118 void game_motion(int x, int y)
 119 {
 120         if(cur_scr && cur_scr->motion) {
 121                 cur_scr->motion(x, y);
 122         }
 123         mouse_x = x;
 124         mouse_y = y;
 125 }
 126
 127 void game_chscr(struct game_screen *scr)
 128 {
 129         if(!scr) return;
 130
 131         if(scr->start && scr->start() == -1) {
 132                 return;
 133         }
 134
 135         if(cur_scr && cur_scr->stop) {
 136                 cur_scr->stop();
 137         }
 138         cur_scr = scr;
 139 }