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 / 8;
  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         /* allocate a couple extra rows as a guard band, until we fucking fix the rasterizer */
  50         if(!(fb_pixels = malloc(fbsize + (fb_width * fb_bpp / 8) * 2))) {
  51                 fprintf(stderr, "failed to allocate backbuffer\n");
  52                 return 1;
  53         }
  54         fb_pixels += fb_width;
  55
  56         if(!(vmem = set_video_mode(fb_width, fb_height, fb_bpp, 1))) {
  57                 return 1;
  58         }
  59
  60         if(demo_init(argc, argv) == -1) {
  61                 set_text_mode();
  62                 return 1;
  63         }
  64
  65         if(opt.sball && sball_init() == 0) {
  66                 use_sball = 1;
  67         }
  68
  69         reset_timer();
  70
  71         while(!quit) {
  72 #ifndef NOKEYB
  73                 int key;
  74                 while((key = kb_getkey()) != -1) {
  75                         demo_keyboard(key, 1);
  76                 }
  77 #else
  78                 if(kbhit()) {
  79                         demo_keyboard(getch(), 1);
  80                 }
  81 #endif
  82                 if(quit) goto break_evloop;
  83
  84                 if(use_mouse) {
  85                         mouse_bmask = read_mouse(&mouse_x, &mouse_y);
  86                 }
  87                 if(use_sball && sball_pending()) {
  88                         sball_event ev;
  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         if(!pixels) {
 119                 pixels = fb_pixels;
 120         }
 121
 122         /* just memcpy to the front buffer */
 123         if(opt.vsync) {
 124                 wait_vsync();
 125         }
 126         drawFps(pixels);
 127         memcpy(vmem, pixels, fbsize);
 128 }
 129
 130
 131 #define TX(ev)  ((ev)->motion.motion[0])
 132 #define TY(ev)  ((ev)->motion.motion[1])
 133 #define TZ(ev)  ((ev)->motion.motion[2])
 134 #define RX(ev)  ((ev)->motion.motion[3])
 135 #define RY(ev)  ((ev)->motion.motion[4])
 136 #define RZ(ev)  ((ev)->motion.motion[5])
 137
 138 static int handle_sball_event(sball_event *ev)
 139 {
 140         switch(ev->type) {
 141         case SBALL_EV_MOTION:
 142                 if(RX(ev) | RY(ev) | RZ(ev)) {
 143                         float rx = (float)RX(ev);
 144                         float ry = (float)RY(ev);
 145                         float rz = (float)RZ(ev);
 146                         float axis_len = sqrt(rx * rx + ry * ry + rz * rz);
 147                         if(axis_len > 0.0) {
 148                                 rot = quat_rotate(rot, axis_len * 0.001, -rx / axis_len,
 149                                                 -ry / axis_len, -rz / axis_len);
 150                         }
 151                 }
 152
 153                 pos.x += TX(ev) * 0.001;
 154                 pos.y += TY(ev) * 0.001;
 155                 pos.z += TZ(ev) * 0.001;
 156                 break;
 157
 158         case SBALL_EV_BUTTON:
 159                 if(ev->button.pressed) {
 160                         pos = v3_cons(0, 0, 0);
 161                         rot = quat_cons(1, 0, 0, 0);
 162                 }
 163                 break;
 164         }
 165
 166         return 0;
 167 }
 168
 169 void recalc_sball_matrix(float *xform)
 170 {
 171         quat_to_mat(xform, rot);
 172         xform[12] = pos.x;
 173         xform[13] = pos.y;
 174         xform[14] = pos.z;
 175 }