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 long fbsize;
  27
  28 static int use_sball;
  29 static vec3_t pos = {0, 0, 0};
  30 static quat_t rot = {0, 0, 0, 1};
  31
  32 int main(int argc, char **argv)
  33 {
  34 #ifdef __DJGPP__
  35         __djgpp_nearptr_enable();
  36 #endif
  37
  38         fbsize = FB_WIDTH * FB_HEIGHT * FB_BPP / 8;
  39
  40         init_logger("demo.log");
  41
  42         init_timer(100);
  43 #ifndef NOKEYB
  44         kb_init(32);
  45 #endif
  46
  47         /* now start_loadscr sets up fb_pixels to the space used by the loading image,
  48          * so no need to allocate another framebuffer
  49          */
  50 #if 0
  51         /* allocate a couple extra rows as a guard band, until we fucking fix the rasterizer */
  52         if(!(fb_pixels = malloc(fbsize + (FB_WIDTH * FB_BPP / 8) * 2))) {
  53                 fprintf(stderr, "failed to allocate backbuffer\n");
  54                 return 1;
  55         }
  56         fb_pixels += FB_WIDTH;
  57 #endif
  58
  59         if(!(vmem = set_video_mode(FB_WIDTH, FB_HEIGHT, FB_BPP, 1))) {
  60                 return 1;
  61         }
  62
  63         if(opt.mouse) {
  64                 if((opt.mouse = have_mouse())) {
  65                         printf("initializing mouse input\n");
  66                         set_mouse_limits(0, 0, FB_WIDTH - 1, FB_HEIGHT - 1);
  67                         set_mouse(FB_WIDTH / 2, FB_HEIGHT / 2);
  68                 }
  69         }
  70
  71         if(demo_init(argc, argv) == -1) {
  72                 set_text_mode();
  73                 return 1;
  74         }
  75
  76         if(opt.sball && sball_init() == 0) {
  77                 use_sball = 1;
  78         }
  79
  80         reset_timer();
  81
  82         while(!quit) {
  83 #ifndef NOKEYB
  84                 int key;
  85                 while((key = kb_getkey()) != -1) {
  86                         demo_keyboard(key, 1);
  87                 }
  88 #else
  89                 if(kbhit()) {
  90                         demo_keyboard(getch(), 1);
  91                 }
  92 #endif
  93                 if(quit) goto break_evloop;
  94
  95                 if(opt.mouse) {
  96                         mouse_bmask = read_mouse(&mouse_x, &mouse_y);
  97                 }
  98                 if(use_sball && sball_pending()) {
  99                         sball_event ev;
 100                         while(sball_getevent(&ev)) {
 101                                 handle_sball_event(&ev);
 102                         }
 103                         recalc_sball_matrix(sball_matrix);
 104                 }
 105
 106                 time_msec = get_msec();
 107                 demo_draw();
 108         }
 109
 110 break_evloop:
 111         set_text_mode();
 112         demo_cleanup();
 113 #ifndef NOKEYB
 114         kb_shutdown();
 115 #endif
 116         if(use_sball) {
 117                 sball_shutdown();
 118         }
 119         return 0;
 120 }
 121
 122 void demo_quit(void)
 123 {
 124         quit = 1;
 125 }
 126
 127 void swap_buffers(void *pixels)
 128 {
 129         if(!pixels) {
 130                 pixels = fb_pixels;
 131         }
 132
 133         demo_post_draw(pixels);
 134
 135         /* just memcpy to the front buffer */
 136         if(opt.vsync) {
 137                 wait_vsync();
 138         }
 139         memcpy(vmem, pixels, fbsize);
 140 }
 141
 142
 143 #define TX(ev)  ((ev)->motion.motion[0])
 144 #define TY(ev)  ((ev)->motion.motion[1])
 145 #define TZ(ev)  ((ev)->motion.motion[2])
 146 #define RX(ev)  ((ev)->motion.motion[3])
 147 #define RY(ev)  ((ev)->motion.motion[4])
 148 #define RZ(ev)  ((ev)->motion.motion[5])
 149
 150 static int handle_sball_event(sball_event *ev)
 151 {
 152         switch(ev->type) {
 153         case SBALL_EV_MOTION:
 154                 if(RX(ev) | RY(ev) | RZ(ev)) {
 155                         float rx = (float)RX(ev);
 156                         float ry = (float)RY(ev);
 157                         float rz = (float)RZ(ev);
 158                         float axis_len = sqrt(rx * rx + ry * ry + rz * rz);
 159                         if(axis_len > 0.0) {
 160                                 rot = quat_rotate(rot, axis_len * 0.001, -rx / axis_len,
 161                                                 -ry / axis_len, -rz / axis_len);
 162                         }
 163                 }
 164
 165                 pos.x += TX(ev) * 0.001;
 166                 pos.y += TY(ev) * 0.001;
 167                 pos.z += TZ(ev) * 0.001;
 168                 break;
 169
 170         case SBALL_EV_BUTTON:
 171                 if(ev->button.pressed) {
 172                         pos = v3_cons(0, 0, 0);
 173                         rot = quat_cons(1, 0, 0, 0);
 174                 }
 175                 break;
 176         }
 177
 178         return 0;
 179 }
 180
 181 void recalc_sball_matrix(float *xform)
 182 {
 183         quat_to_mat(xform, rot);
 184         xform[12] = pos.x;
 185         xform[13] = pos.y;
 186         xform[14] = pos.z;
 187 }