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
  19 #undef NOKEYB
  20
  21 static int handle_sball_event(sball_event *ev);
  22 static void recalc_sball_matrix(float *xform);
  23
  24 static int quit;
  25 static int use_mouse;
  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         fbsize = fb_width * fb_height * fb_bpp / CHAR_BIT;
  35
  36         init_logger("demo.log");
  37
  38         init_timer(100);
  39 #ifndef NOKEYB
  40         kb_init(32);
  41 #endif
  42
  43         if((use_mouse = have_mouse())) {
  44                 printf("initializing mouse input\n");
  45                 set_mouse_limits(0, 0, fb_width, fb_height);
  46                 set_mouse(fb_width / 2, fb_height / 2);
  47         }
  48
  49         if(!(fb_pixels = malloc(fbsize))) {
  50                 fprintf(stderr, "failed to allocate backbuffer\n");
  51                 return 1;
  52         }
  53
  54         if(!(vmem = set_video_mode(fb_width, fb_height, fb_bpp))) {
  55                 return 1;
  56         }
  57
  58         if(demo_init(argc, argv) == -1) {
  59                 set_text_mode();
  60                 return 1;
  61         }
  62
  63         if(opt.sball && sball_init() == 0) {
  64                 use_sball = 1;
  65         }
  66
  67         reset_timer();
  68
  69         while(!quit) {
  70 #ifndef NOKEYB
  71                 int key;
  72                 while((key = kb_getkey()) != -1) {
  73                         demo_keyboard(key, 1);
  74                 }
  75 #else
  76                 if(kbhit()) {
  77                         demo_keyboard(getch(), 1);
  78                 }
  79 #endif
  80                 if(quit) goto break_evloop;
  81
  82                 if(use_mouse) {
  83                         mouse_bmask = read_mouse(&mouse_x, &mouse_y);
  84                 }
  85                 if(use_sball && sball_pending()) {
  86                         sball_event ev;
  87                         while(sball_getevent(&ev)) {
  88                                 handle_sball_event(&ev);
  89                         }
  90                         recalc_sball_matrix(sball_matrix);
  91                 }
  92
  93                 time_msec = get_msec();
  94                 demo_draw();
  95         }
  96
  97 break_evloop:
  98         set_text_mode();
  99         demo_cleanup();
 100 #ifndef NOKEYB
 101         kb_shutdown();
 102 #endif
 103         if(use_sball) {
 104                 sball_shutdown();
 105         }
 106         return 0;
 107 }
 108
 109 void demo_quit(void)
 110 {
 111         quit = 1;
 112 }
 113
 114 void swap_buffers(void *pixels)
 115 {
 116         if(!pixels) {
 117                 pixels = fb_pixels;
 118         }
 119
 120         /* just memcpy to the front buffer */
 121         if(opt.vsync) {
 122                 wait_vsync();
 123         }
 124         drawFps(pixels);
 125         memcpy(vmem, pixels, fbsize);
 126 }
 127
 128
 129 #define TX(ev)  ((ev)->motion.motion[0])
 130 #define TY(ev)  ((ev)->motion.motion[1])
 131 #define TZ(ev)  ((ev)->motion.motion[2])
 132 #define RX(ev)  ((ev)->motion.motion[3])
 133 #define RY(ev)  ((ev)->motion.motion[4])
 134 #define RZ(ev)  ((ev)->motion.motion[5])
 135
 136 static int handle_sball_event(sball_event *ev)
 137 {
 138         switch(ev->type) {
 139         case SBALL_EV_MOTION:
 140                 if(RX(ev) | RY(ev) | RZ(ev)) {
 141                         float rx = (float)RX(ev);
 142                         float ry = (float)RY(ev);
 143                         float rz = (float)RZ(ev);
 144                         float axis_len = sqrt(rx * rx + ry * ry + rz * rz);
 145                         if(axis_len > 0.0) {
 146                                 rot = quat_rotate(rot, axis_len * 0.001, -rx / axis_len,
 147                                                 -ry / axis_len, -rz / axis_len);
 148                         }
 149                 }
 150
 151                 pos.x += TX(ev) * 0.001;
 152                 pos.y += TY(ev) * 0.001;
 153                 pos.z += TZ(ev) * 0.001;
 154                 break;
 155
 156         case SBALL_EV_BUTTON:
 157                 if(ev->button.pressed) {
 158                         pos = v3_cons(0, 0, 0);
 159                         rot = quat_cons(1, 0, 0, 0);
 160                 }
 161                 break;
 162         }
 163
 164         return 0;
 165 }
 166
 167 void recalc_sball_matrix(float *xform)
 168 {
 169         quat_to_mat(xform, rot);
 170         xform[12] = pos.x;
 171         xform[13] = pos.y;
 172         xform[14] = pos.z;
 173 }