git.mutantstargoat.com Git - dosdemo/blob - src/infcubes.c

   1 #include <stdio.h>
   2 #include <string.h>
   3 #include <math.h>
   4 #include "demo.h"
   5 #include "3dgfx.h"
   6 #include "screen.h"
   7 #include "cfgopt.h"
   8 #include "polyfill.h"
   9 #include "imago2.h"
  10 #include "gfxutil.h"
  11 #include "mesh.h"
  12
  13 static int init(void);
  14 static void destroy(void);
  15 static void start(long trans_time);
  16 static void draw(void);
  17 static void draw_cube(float sz);
  18
  19 static struct screen scr = {
  20         "infcubes",
  21         init,
  22         destroy,
  23         start, 0,
  24         draw
  25 };
  26
  27 static float cam_theta = -29, cam_phi = 35;
  28 static float cam_dist = 5;
  29 static struct pimage tex_inner, tex_outer;
  30 static struct g3d_mesh mesh_cube;
  31
  32 struct screen *infcubes_screen(void)
  33 {
  34         return &scr;
  35 }
  36
  37
  38 static int init(void)
  39 {
  40         if(!(tex_inner.pixels = img_load_pixels("data/crate.jpg", &tex_inner.width,
  41                                         &tex_inner.height, IMG_FMT_RGB24))) {
  42                 fprintf(stderr, "infcubes: failed to load crate texture\n");
  43                 return -1;
  44         }
  45         convimg_rgb24_rgb16(tex_inner.pixels, (unsigned char*)tex_inner.pixels, tex_inner.width, tex_inner.height);
  46
  47         if(!(tex_outer.pixels = img_load_pixels("data/steelfrm.jpg", &tex_outer.width,
  48                                         &tex_outer.height, IMG_FMT_RGB24))) {
  49                 fprintf(stderr, "infcubes: failed to load ornamental texture\n");
  50                 return -1;
  51         }
  52         convimg_rgb24_rgb16(tex_outer.pixels, (unsigned char*)tex_outer.pixels, tex_outer.width, tex_outer.height);
  53
  54         if(gen_cube_mesh(&mesh_cube, 1.0f, 3) == -1) {
  55                 return -1;
  56         }
  57         return 0;
  58 }
  59
  60 static void destroy(void)
  61 {
  62         img_free_pixels(tex_inner.pixels);
  63 }
  64
  65 static void start(long trans_time)
  66 {
  67         g3d_matrix_mode(G3D_PROJECTION);
  68         g3d_load_identity();
  69         g3d_perspective(50.0, 1.3333333, 0.5, 100.0);
  70
  71         g3d_enable(G3D_CULL_FACE);
  72         g3d_disable(G3D_LIGHTING);
  73         g3d_enable(G3D_LIGHT0);
  74 }
  75
  76 static void update(void)
  77 {
  78         mouse_orbit_update(&cam_theta, &cam_phi, &cam_dist);
  79 }
  80
  81 static void draw(void)
  82 {
  83         update();
  84
  85         g3d_matrix_mode(G3D_MODELVIEW);
  86         g3d_load_identity();
  87         g3d_translate(0, 0, -cam_dist);
  88         g3d_rotate(cam_phi, 1, 0, 0);
  89         g3d_rotate(cam_theta, 0, 1, 0);
  90         if(opt.sball) {
  91                 g3d_mult_matrix(sball_matrix);
  92         }
  93
  94         memset(fb_pixels, 0, fb_width * fb_height * 2);
  95
  96         g3d_polygon_mode(G3D_TEX);
  97
  98         g3d_push_matrix();
  99         g3d_scale(-6, -6, -6);
 100         g3d_set_texture(tex_outer.width, tex_outer.height, tex_outer.pixels);
 101         draw_mesh(&mesh_cube);
 102         g3d_pop_matrix();
 103
 104         g3d_set_texture(tex_inner.width, tex_inner.height, tex_inner.pixels);
 105         draw_mesh(&mesh_cube);
 106
 107         swap_buffers(fb_pixels);
 108 }