terrain.h

   1 #include "common.h"
   2
   3 static void render_terrain(m4x4f projection, v3f camera);
   4 static void render_sky(m4x3f camera);
   5
   6 #ifndef TERRAIN_H
   7 #define TERRAIN_H
   8
   9 #include "model.h"
  10 #include "render.h"
  11 #include "water.h"
  12
  13 #include "shaders/terrain.h"
  14 #include "shaders/sky.h"
  15
  16 vg_tex2d tex_terrain_colours = { .path = "textures/gradients.qoi",
  17                                  .flags = VG_TEXTURE_CLAMP | VG_TEXTURE_NEAREST
  18 };
  19 vg_tex2d tex_terrain_noise = { .path = "textures/garbage.qoi",
  20                                  .flags = VG_TEXTURE_NEAREST };
  21
  22 static struct
  23 {
  24    glmesh skydome;
  25 }
  26 trender;
  27
  28 static void terrain_register(void)
  29 {
  30    shader_terrain_register();
  31    shader_sky_register();
  32 }
  33
  34 static void terrain_init(void)
  35 {
  36    vg_tex2d_init( (vg_tex2d *[]){ &tex_terrain_colours,
  37                                   &tex_terrain_noise }, 2 );
  38
  39
  40    model *msky = vg_asset_read("models/rs_skydome.mdl");
  41    model_unpack( msky, &trender.skydome );
  42    free(msky);
  43 }
  44
  45 static void render_terrain(m4x4f projection, v3f camera)
  46 {
  47    shader_terrain_use();
  48    shader_terrain_uTexGarbage(0);
  49    shader_terrain_uTexGradients(1);
  50
  51    vg_tex2d_bind( &tex_terrain_noise, 0 );
  52    vg_tex2d_bind( &tex_terrain_colours, 1 );
  53
  54    m4x3f identity_matrix;
  55    m4x3_identity( identity_matrix );
  56    shader_terrain_uPv( projection );
  57    shader_terrain_uMdl( identity_matrix );
  58    shader_terrain_uCamera( camera );
  59    shader_terrain_uPlane( (v4f){ 0.0f,1.0f,0.0f, wrender.height } );
  60 }
  61
  62 static void render_sky(m4x3f camera)
  63 {
  64    m4x4f projection, full;
  65    pipeline_projection( projection, 0.4f, 1000.0f );
  66
  67    m4x3f inverse;
  68    m3x3_transpose( camera, inverse );
  69    v3_copy((v3f){0.0f,0.0f,0.0f}, inverse[3]);
  70    m4x3_expand( inverse, full );
  71    m4x4_mul( projection, full, full );
  72
  73    m4x3f identity_matrix;
  74    m4x3_identity( identity_matrix );
  75
  76    shader_sky_use();
  77    shader_sky_uMdl(identity_matrix);
  78    shader_sky_uPv(full);
  79    shader_sky_uTexGarbage(0);
  80    shader_sky_uTime( vg_time );
  81    vg_tex2d_bind( &tex_terrain_noise, 0 );
  82
  83    glDepthMask(GL_FALSE);
  84    glDisable(GL_DEPTH_TEST);
  85
  86    mesh_bind( &trender.skydome );
  87    mesh_draw( &trender.skydome );
  88
  89    glEnable(GL_DEPTH_TEST);
  90    glDepthMask(GL_TRUE);
  91 }
  92
  93 #endif