terrain.h

   1 #ifndef TERRAIN_H
   2 #define TERRAIN_H
   3
   4 #define VG_3D
   5 #include "vg/vg.h"
   6 #include "model.h"
   7 #include "render.h"
   8
   9 #include "shaders/terrain.h"
  10 #include "shaders/sky.h"
  11
  12 vg_tex2d tex_terrain_colours = { .path = "textures/gradients.qoi",
  13                                  .flags = VG_TEXTURE_CLAMP | VG_TEXTURE_NEAREST
  14 };
  15 vg_tex2d tex_terrain_noise = { .path = "textures/garbage.qoi",
  16                                  .flags = VG_TEXTURE_NEAREST };
  17
  18 static struct
  19 {
  20    glmesh skydome;
  21 }
  22 trender;
  23
  24 static void terrain_register(void)
  25 {
  26    shader_terrain_register();
  27    shader_sky_register();
  28 }
  29
  30 static void terrain_init(void)
  31 {
  32    vg_tex2d_init( (vg_tex2d *[]){ &tex_terrain_colours,
  33                                   &tex_terrain_noise }, 2 );
  34
  35
  36    model *msky = vg_asset_read("models/rs_skydome.mdl");
  37    model_unpack( msky, &trender.skydome );
  38    free(msky);
  39 }
  40
  41 static void render_terrain(m4x4f projection, v3f camera)
  42 {
  43    shader_terrain_use();
  44    shader_terrain_uTexGarbage(0);
  45    shader_terrain_uTexGradients(1);
  46
  47    vg_tex2d_bind( &tex_terrain_noise, 0 );
  48    vg_tex2d_bind( &tex_terrain_colours, 1 );
  49
  50    m4x3f identity_matrix;
  51    m4x3_identity( identity_matrix );
  52    shader_terrain_uPv( projection );
  53    shader_terrain_uMdl( identity_matrix );
  54    shader_terrain_uCamera( camera );
  55 }
  56
  57 static void render_sky(m4x3f camera)
  58 {
  59    m4x4f projection, full;
  60    pipeline_projection( projection, 0.4f, 1000.0f );
  61
  62    m4x3f inverse;
  63    m3x3_transpose( camera, inverse );
  64    v3_copy((v3f){0.0f,0.0f,0.0f}, inverse[3]);
  65    m4x3_expand( inverse, full );
  66    m4x4_mul( projection, full, full );
  67
  68    m4x3f identity_matrix;
  69    m4x3_identity( identity_matrix );
  70
  71    shader_sky_use();
  72    shader_sky_uMdl(identity_matrix);
  73    shader_sky_uPv(full);
  74    shader_sky_uTexGarbage(0);
  75    shader_sky_uTime( vg_time );
  76    vg_tex2d_bind( &tex_terrain_noise, 0 );
  77
  78    glDepthMask(GL_FALSE);
  79    glDisable(GL_DEPTH_TEST);
  80
  81    mesh_bind( &trender.skydome );
  82    mesh_draw( &trender.skydome );
  83
  84    glEnable(GL_DEPTH_TEST);
  85    glDepthMask(GL_TRUE);
  86 }
  87
  88 #endif