git.mutantstargoat.com Git - dosdemo/blob - src/dos/main.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <math.h>
   4 #include <string.h>
   5 #include <limits.h>
   6 #include <assert.h>
   7 #include <conio.h>
   8 #include "demo.h"
   9 #include "keyb.h"
  10 #include "mouse.h"
  11 #include "timer.h"
  12 #include "gfx.h"
  13 #include "vmath.h"
  14 #include "sball.h"
  15 #include "cfgopt.h"
  16 #include "logger.h"
  17 #include "tinyfps.h"
  18 #include "cdpmi.h"
  19
  20 #undef NOKEYB
  21
  22 static int handle_sball_event(sball_event *ev);
  23 static void recalc_sball_matrix(float *xform);
  24
  25 static int quit;
  26 static int use_mouse;
  27 static long fbsize;
  28
  29 static int use_sball;
  30 static vec3_t pos = {0, 0, 0};
  31 static quat_t rot = {0, 0, 0, 1};
  32
  33 int main(int argc, char **argv)
  34 {
  35 #ifdef __DJGPP__
  36         __djgpp_nearptr_enable();
  37 #endif
  38
  39         fbsize = fb_width * fb_height * fb_bpp / 8;
  40
  41         init_logger("demo.log");
  42
  43         init_timer(100);
  44 #ifndef NOKEYB
  45         kb_init(32);
  46 #endif
  47
  48         if((use_mouse = have_mouse())) {
  49                 printf("initializing mouse input\n");
  50                 set_mouse_limits(0, 0, fb_width, fb_height);
  51                 set_mouse(fb_width / 2, fb_height / 2);
  52         }
  53
  54         /* now start_loadscr sets up fb_pixels to the space used by the loading image,
  55          * so no need to allocate another framebuffer
  56          */
  57 #if 0
  58         /* allocate a couple extra rows as a guard band, until we fucking fix the rasterizer */
  59         if(!(fb_pixels = malloc(fbsize + (fb_width * fb_bpp / 8) * 2))) {
  60                 fprintf(stderr, "failed to allocate backbuffer\n");
  61                 return 1;
  62         }
  63         fb_pixels += fb_width;
  64 #endif
  65
  66         if(!(vmem = set_video_mode(fb_width, fb_height, fb_bpp, 1))) {
  67                 return 1;
  68         }
  69
  70         if(demo_init(argc, argv) == -1) {
  71                 set_text_mode();
  72                 return 1;
  73         }
  74
  75         if(opt.sball && sball_init() == 0) {
  76                 use_sball = 1;
  77         }
  78
  79         reset_timer();
  80
  81         while(!quit) {
  82 #ifndef NOKEYB
  83                 int key;
  84                 while((key = kb_getkey()) != -1) {
  85                         demo_keyboard(key, 1);
  86                 }
  87 #else
  88                 if(kbhit()) {
  89                         demo_keyboard(getch(), 1);
  90                 }
  91 #endif
  92                 if(quit) goto break_evloop;
  93
  94                 if(use_mouse) {
  95                         mouse_bmask = read_mouse(&mouse_x, &mouse_y);
  96                 }
  97                 if(use_sball && sball_pending()) {
  98                         sball_event ev;
  99                         while(sball_getevent(&ev)) {
 100                                 handle_sball_event(&ev);
 101                         }
 102                         recalc_sball_matrix(sball_matrix);
 103                 }
 104
 105                 time_msec = get_msec();
 106                 demo_draw();
 107         }
 108
 109 break_evloop:
 110         set_text_mode();
 111         demo_cleanup();
 112 #ifndef NOKEYB
 113         kb_shutdown();
 114 #endif
 115         if(use_sball) {
 116                 sball_shutdown();
 117         }
 118         return 0;
 119 }
 120
 121 void demo_quit(void)
 122 {
 123         quit = 1;
 124 }
 125
 126 void swap_buffers(void *pixels)
 127 {
 128         if(!pixels) {
 129                 pixels = fb_pixels;
 130         }
 131
 132         demo_post_draw(pixels);
 133
 134         /* just memcpy to the front buffer */
 135         if(opt.vsync) {
 136                 wait_vsync();
 137         }
 138         memcpy(vmem, pixels, fbsize);
 139 }
 140
 141
 142 #define TX(ev)  ((ev)->motion.motion[0])
 143 #define TY(ev)  ((ev)->motion.motion[1])
 144 #define TZ(ev)  ((ev)->motion.motion[2])
 145 #define RX(ev)  ((ev)->motion.motion[3])
 146 #define RY(ev)  ((ev)->motion.motion[4])
 147 #define RZ(ev)  ((ev)->motion.motion[5])
 148
 149 static int handle_sball_event(sball_event *ev)
 150 {
 151         switch(ev->type) {
 152         case SBALL_EV_MOTION:
 153                 if(RX(ev) | RY(ev) | RZ(ev)) {
 154                         float rx = (float)RX(ev);
 155                         float ry = (float)RY(ev);
 156                         float rz = (float)RZ(ev);
 157                         float axis_len = sqrt(rx * rx + ry * ry + rz * rz);
 158                         if(axis_len > 0.0) {
 159                                 rot = quat_rotate(rot, axis_len * 0.001, -rx / axis_len,
 160                                                 -ry / axis_len, -rz / axis_len);
 161                         }
 162                 }
 163
 164                 pos.x += TX(ev) * 0.001;
 165                 pos.y += TY(ev) * 0.001;
 166                 pos.z += TZ(ev) * 0.001;
 167                 break;
 168
 169         case SBALL_EV_BUTTON:
 170                 if(ev->button.pressed) {
 171                         pos = v3_cons(0, 0, 0);
 172                         rot = quat_cons(1, 0, 0, 0);
 173                 }
 174                 break;
 175         }
 176
 177         return 0;
 178 }
 179
 180 void recalc_sball_matrix(float *xform)
 181 {
 182         quat_to_mat(xform, rot);
 183         xform[12] = pos.x;
 184         xform[13] = pos.y;
 185         xform[14] = pos.z;
 186 }