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                 printf("initializing mouse input\n");
  44                 set_mouse_limits(0, 0, fb_width, fb_height);
  45                 set_mouse(fb_width / 2, fb_height / 2);
  46         }
  47
  48         if(!(fb_pixels = malloc(fbsize))) {
  49                 fprintf(stderr, "failed to allocate backbuffer\n");
  50                 return 1;
  51         }
  52
  53         if(!(vmem_front = set_video_mode(fb_width, fb_height, fb_bpp))) {
  54                 return 1;
  55         }
  56         /* TODO implement multiple video memory pages for flipping */
  57         vmem_back = vmem_front;
  58
  59         if(demo_init(argc, argv) == -1) {
  60                 set_text_mode();
  61                 return 1;
  62         }
  63
  64         if(opt.sball && sball_init() == 0) {
  65                 use_sball = 1;
  66         }
  67
  68         reset_timer();
  69
  70         while(!quit) {
  71 #ifndef NOKEYB
  72                 int key;
  73                 while((key = kb_getkey()) != -1) {
  74                         demo_keyboard(key, 1);
  75                 }
  76 #else
  77                 if(kbhit()) {
  78                         demo_keyboard(getch(), 1);
  79                 }
  80 #endif
  81                 if(quit) goto break_evloop;
  82
  83                 if(use_mouse) {
  84                         mouse_bmask = read_mouse(&mouse_x, &mouse_y);
  85                 }
  86                 if(use_sball && sball_pending()) {
  87                         sball_event ev;
  88                         printf("got sball event\n");
  89                         while(sball_getevent(&ev)) {
  90                                 handle_sball_event(&ev);
  91                         }
  92                         recalc_sball_matrix(sball_matrix);
  93                 }
  94
  95                 time_msec = get_msec();
  96                 demo_draw();
  97         }
  98
  99 break_evloop:
 100         set_text_mode();
 101         demo_cleanup();
 102 #ifndef NOKEYB
 103         kb_shutdown();
 104 #endif
 105         if(use_sball) {
 106                 sball_shutdown();
 107         }
 108         return 0;
 109 }
 110
 111 void demo_quit(void)
 112 {
 113         quit = 1;
 114 }
 115
 116 void swap_buffers(void *pixels)
 117 {
 118         /* TODO implement page flipping */
 119         if(pixels) {
 120                 if(opt.vsync) {
 121                         wait_vsync();
 122                 }
 123                 drawFps(pixels);
 124                 memcpy(vmem_front, pixels, fbsize);
 125         } else {
 126                 drawFps(vmem_back);
 127
 128                 if(opt.vsync) {
 129                         wait_vsync();
 130                 }
 131         }
 132 }
 133
 134
 135 #define TX(ev)  ((ev)->motion.motion[0])
 136 #define TY(ev)  ((ev)->motion.motion[1])
 137 #define TZ(ev)  ((ev)->motion.motion[2])
 138 #define RX(ev)  ((ev)->motion.motion[3])
 139 #define RY(ev)  ((ev)->motion.motion[4])
 140 #define RZ(ev)  ((ev)->motion.motion[5])
 141
 142 static int handle_sball_event(sball_event *ev)
 143 {
 144         switch(ev->type) {
 145         case SBALL_EV_MOTION:
 146                 if(RX(ev) | RY(ev) | RZ(ev)) {
 147                         float rx = (float)RX(ev);
 148                         float ry = (float)RY(ev);
 149                         float rz = (float)RZ(ev);
 150                         float axis_len = sqrt(rx * rx + ry * ry + rz * rz);
 151                         if(axis_len > 0.0) {
 152                                 rot = quat_rotate(rot, axis_len * 0.001, -rx / axis_len,
 153                                                 -ry / axis_len, -rz / axis_len);
 154                         }
 155                 }
 156
 157                 pos.x += TX(ev) * 0.001;
 158                 pos.y += TY(ev) * 0.001;
 159                 pos.z += TZ(ev) * 0.001;
 160                 break;
 161
 162         case SBALL_EV_BUTTON:
 163                 if(ev->button.pressed) {
 164                         pos = v3_cons(0, 0, 0);
 165                         rot = quat_cons(1, 0, 0, 0);
 166                 }
 167                 break;
 168         }
 169
 170         return 0;
 171 }
 172
 173 void recalc_sball_matrix(float *xform)
 174 {
 175         quat_to_mat(xform, rot);
 176         xform[12] = pos.x;
 177         xform[13] = pos.y;
 178         xform[14] = pos.z;
 179 }