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 <conio.h>
   7 #include "demo.h"
   8 #include "keyb.h"
   9 #include "mouse.h"
  10 #include "timer.h"
  11 #include "gfx.h"
  12 #include "vmath.h"
  13 #include "sball.h"
  14 #include "cfgopt.h"
  15 #include "logger.h"
  16 #include "tinyfps.h"
  17
  18 #undef NOKEYB
  19
  20 static int handle_sball_event(sball_event *ev);
  21 static void recalc_sball_matrix(float *xform);
  22
  23 static int quit;
  24 static int use_mouse;
  25 static long fbsize;
  26
  27 static int use_sball;
  28 static vec3_t pos = {0, 0, 0};
  29 static quat_t rot = {0, 0, 0, 1};
  30
  31 int main(int argc, char **argv)
  32 {
  33         fbsize = fb_width * fb_height * fb_bpp / CHAR_BIT;
  34
  35         init_logger("demo.log");
  36
  37         init_timer(100);
  38 #ifndef NOKEYB
  39         kb_init(32);
  40 #endif
  41
  42         if((use_mouse = have_mouse())) {
  43                 set_mouse_limits(0, 0, fb_width, fb_height);
  44                 set_mouse(fb_width / 2, fb_height / 2);
  45         }
  46
  47         if(!(fb_pixels = malloc(fbsize))) {
  48                 fprintf(stderr, "failed to allocate backbuffer\n");
  49                 return 1;
  50         }
  51
  52         if(!(vmem_front = set_video_mode(fb_width, fb_height, fb_bpp))) {
  53                 return 1;
  54         }
  55         /* TODO implement multiple video memory pages for flipping */
  56         vmem_back = vmem_front;
  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                         printf("got sball event\n");
  88                         while(sball_getevent(&ev)) {
  89                                 handle_sball_event(&ev);
  90                         }
  91                         recalc_sball_matrix(sball_matrix);
  92                 }
  93
  94                 time_msec = get_msec();
  95                 demo_draw();
  96         }
  97
  98 break_evloop:
  99         set_text_mode();
 100         demo_cleanup();
 101 #ifndef NOKEYB
 102         kb_shutdown();
 103 #endif
 104         if(use_sball) {
 105                 sball_shutdown();
 106         }
 107         return 0;
 108 }
 109
 110 void demo_quit(void)
 111 {
 112         quit = 1;
 113 }
 114
 115 void swap_buffers(void *pixels)
 116 {
 117         /* TODO implement page flipping */
 118         if(pixels) {
 119                 if(opt.vsync) {
 120                         wait_vsync();
 121                 }
 122                 drawFps(pixels);
 123                 memcpy(vmem_front, pixels, fbsize);
 124         } else {
 125                 drawFps(vmem_back);
 126
 127                 if(opt.vsync) {
 128                         wait_vsync();
 129                 }
 130         }
 131 }
 132
 133
 134 #define TX(ev)  ((ev)->motion.motion[0])
 135 #define TY(ev)  ((ev)->motion.motion[1])
 136 #define TZ(ev)  ((ev)->motion.motion[2])
 137 #define RX(ev)  ((ev)->motion.motion[3])
 138 #define RY(ev)  ((ev)->motion.motion[4])
 139 #define RZ(ev)  ((ev)->motion.motion[5])
 140
 141 static int handle_sball_event(sball_event *ev)
 142 {
 143         switch(ev->type) {
 144         case SBALL_EV_MOTION:
 145                 if(RX(ev) | RY(ev) | RZ(ev)) {
 146                         float rx = (float)RX(ev);
 147                         float ry = (float)RY(ev);
 148                         float rz = (float)RZ(ev);
 149                         float axis_len = sqrt(rx * rx + ry * ry + rz * rz);
 150                         if(axis_len > 0.0) {
 151                                 rot = quat_rotate(rot, axis_len * 0.001, -rx / axis_len,
 152                                                 -ry / axis_len, -rz / axis_len);
 153                         }
 154                 }
 155
 156                 pos.x += TX(ev) * 0.001;
 157                 pos.y += TY(ev) * 0.001;
 158                 pos.z += TZ(ev) * 0.001;
 159                 break;
 160
 161         case SBALL_EV_BUTTON:
 162                 if(ev->button.pressed) {
 163                         pos = v3_cons(0, 0, 0);
 164                         rot = quat_cons(1, 0, 0, 0);
 165                 }
 166                 break;
 167         }
 168
 169         return 0;
 170 }
 171
 172 void recalc_sball_matrix(float *xform)
 173 {
 174         quat_to_mat(xform, rot);
 175         xform[12] = pos.x;
 176         xform[13] = pos.y;
 177         xform[14] = pos.z;
 178 }