git.mutantstargoat.com Git - dosdemo/blob - src/scr/cybersun.c

   1 #include <stdio.h>
   2 #include "demo.h"
   3 #include "3dgfx.h"
   4 #include "screen.h"
   5 #include "gfxutil.h"
   6 #include "mesh.h"
   7 #include "image.h"
   8
   9 static int init(void);
  10 static void destroy(void);
  11 static void start(long trans_time);
  12 static void draw(void);
  13
  14 static struct screen scr = {
  15         "cybersun",
  16         init,
  17         destroy,
  18         start,
  19         0,
  20         draw
  21 };
  22
  23 static float cam_theta = 0, cam_phi = 10;
  24 static float cam_dist = 6;
  25
  26 static struct g3d_mesh gmesh;
  27 #define GMESH_GRIDSZ    20
  28 #define GMESH_SIZE              50
  29 static struct image gtex;
  30
  31 struct screen *cybersun_screen(void)
  32 {
  33         return &scr;
  34 }
  35
  36 static int init(void)
  37 {
  38         int i, j;
  39
  40         if(gen_plane_mesh(&gmesh, GMESH_SIZE, GMESH_SIZE, GMESH_GRIDSZ, GMESH_GRIDSZ) == -1) {
  41                 return -1;
  42         }
  43         for(i=0; i<gmesh.vcount; i++) {
  44                 gmesh.varr[i].u *= GMESH_GRIDSZ;
  45                 gmesh.varr[i].v *= GMESH_GRIDSZ;
  46         }
  47         if(load_image(&gtex, "data/pgrid.png") == -1) {
  48                 return -1;
  49         }
  50
  51         return 0;
  52 }
  53
  54 static void destroy(void)
  55 {
  56         destroy_mesh(&gmesh);
  57         destroy_image(&gtex);
  58 }
  59
  60 static void start(long trans_time)
  61 {
  62         g3d_matrix_mode(G3D_PROJECTION);
  63         g3d_load_identity();
  64         g3d_perspective(50.0, 1.3333333, 0.5, 500.0);
  65
  66         g3d_enable(G3D_CULL_FACE);
  67
  68         g3d_clear_color(0, 0, 0);
  69 }
  70
  71 static void draw(void)
  72 {
  73         int i;
  74
  75         mouse_orbit_update(&cam_theta, &cam_phi, &cam_dist);
  76
  77         g3d_matrix_mode(G3D_MODELVIEW);
  78         g3d_load_identity();
  79         g3d_translate(0, 0, -cam_dist);
  80         g3d_rotate(cam_phi, 1, 0, 0);
  81         g3d_rotate(cam_theta, 0, 1, 0);
  82         if(opt.sball) {
  83                 g3d_mult_matrix(sball_matrix);
  84         }
  85
  86         g3d_clear(G3D_COLOR_BUFFER_BIT | G3D_DEPTH_BUFFER_BIT);
  87
  88         g3d_set_texture(gtex.width, gtex.height, gtex.pixels);
  89         g3d_enable(G3D_TEXTURE_2D);
  90
  91         g3d_push_matrix();
  92         g3d_rotate(-90, 1, 0, 0);
  93         draw_mesh(&gmesh);
  94         g3d_pop_matrix();
  95
  96         g3d_disable(G3D_TEXTURE_2D);
  97
  98         swap_buffers(fb_pixels);
  99 }