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 "demo.h"
   7 #include "keyb.h"
   8 #include "mouse.h"
   9 #include "timer.h"
  10 #include "gfx.h"
  11 #include "vmath.h"
  12 #include "sball.h"
  13 #include "cfgopt.h"
  14 #include "logger.h"
  15
  16 static int handle_sball_event(sball_event *ev);
  17 static void recalc_sball_matrix(float *xform);
  18
  19 static int quit;
  20 static int use_mouse;
  21 static long fbsize;
  22
  23 static int use_sball;
  24 static vec3_t pos = {0, 0, 0};
  25 static quat_t rot = {0, 0, 0, 1};
  26
  27 int main(int argc, char **argv)
  28 {
  29         fbsize = fb_width * fb_height * fb_bpp / CHAR_BIT;
  30
  31         init_logger("demo.log");
  32
  33         init_timer(100);
  34         kb_init(32);
  35
  36         if((use_mouse = have_mouse())) {
  37                 set_mouse_limits(0, 0, fb_width, fb_height);
  38                 set_mouse(fb_width / 2, fb_height / 2);
  39         }
  40
  41         if(!(fb_pixels = malloc(fbsize))) {
  42                 fprintf(stderr, "failed to allocate backbuffer\n");
  43                 return 1;
  44         }
  45
  46         if(!(vmem_front = set_video_mode(fb_width, fb_height, fb_bpp))) {
  47                 return 1;
  48         }
  49         /* TODO implement multiple video memory pages for flipping */
  50         vmem_back = vmem_front;
  51
  52         if(demo_init(argc, argv) == -1) {
  53                 set_text_mode();
  54                 return 1;
  55         }
  56
  57         if(opt.sball && sball_init() == 0) {
  58                 use_sball = 1;
  59         }
  60
  61         reset_timer();
  62
  63         while(!quit) {
  64                 int key;
  65                 while((key = kb_getkey()) != -1) {
  66                         demo_keyboard(key, 1);
  67                 }
  68                 if(quit) goto break_evloop;
  69
  70                 if(use_mouse) {
  71                         mouse_bmask = read_mouse(&mouse_x, &mouse_y);
  72                 }
  73                 if(use_sball && sball_pending()) {
  74                         sball_event ev;
  75                         printf("got sball event\n");
  76                         while(sball_getevent(&ev)) {
  77                                 handle_sball_event(&ev);
  78                         }
  79                         recalc_sball_matrix(sball_matrix);
  80                 }
  81
  82                 time_msec = get_msec();
  83                 demo_draw();
  84         }
  85
  86 break_evloop:
  87         set_text_mode();
  88         demo_cleanup();
  89         kb_shutdown();
  90         if(use_sball) {
  91                 sball_shutdown();
  92         }
  93         return 0;
  94 }
  95
  96 void demo_quit(void)
  97 {
  98         quit = 1;
  99 }
 100
 101 void swap_buffers(void *pixels)
 102 {
 103         /* TODO implement page flipping */
 104         if(pixels) {
 105                 /*wait_vsync();*/
 106                 drawFps(pixels);
 107                 memcpy(vmem_front, pixels, fbsize);
 108         } else {
 109                 drawFps(vmem_back);
 110         }
 111 }
 112
 113
 114 #define TX(ev)  ((ev)->motion.motion[0])
 115 #define TY(ev)  ((ev)->motion.motion[1])
 116 #define TZ(ev)  ((ev)->motion.motion[2])
 117 #define RX(ev)  ((ev)->motion.motion[3])
 118 #define RY(ev)  ((ev)->motion.motion[4])
 119 #define RZ(ev)  ((ev)->motion.motion[5])
 120
 121 static int handle_sball_event(sball_event *ev)
 122 {
 123         switch(ev->type) {
 124         case SBALL_EV_MOTION:
 125                 if(RX(ev) | RY(ev) | RZ(ev)) {
 126                         float rx = (float)RX(ev);
 127                         float ry = (float)RY(ev);
 128                         float rz = (float)RZ(ev);
 129                         float axis_len = sqrt(rx * rx + ry * ry + rz * rz);
 130                         if(axis_len > 0.0) {
 131                                 rot = quat_rotate(rot, axis_len * 0.001, -rx / axis_len,
 132                                                 -ry / axis_len, -rz / axis_len);
 133                         }
 134                 }
 135
 136                 pos.x += TX(ev) * 0.001;
 137                 pos.y += TY(ev) * 0.001;
 138                 pos.z += TZ(ev) * 0.001;
 139                 break;
 140
 141         case SBALL_EV_BUTTON:
 142                 if(ev->button.pressed) {
 143                         pos = v3_cons(0, 0, 0);
 144                         rot = quat_cons(1, 0, 0, 0);
 145                 }
 146                 break;
 147         }
 148
 149         return 0;
 150 }
 151
 152 void recalc_sball_matrix(float *xform)
 153 {
 154         quat_to_mat(xform, rot);
 155         xform[12] = pos.x;
 156         xform[13] = pos.y;
 157         xform[14] = pos.z;
 158 }