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 #if 0
   7 #ifndef TERRAIN_H
   8 #define TERRAIN_H
   9
  10 #include "model.h"
  11 #include "render.h"
  12 #include "water.h"
  13
  14 #include "shaders/terrain.h"
  15 #include "shaders/sky.h"
  16 #include "shaders/planeinf.h"
  17
  18 vg_tex2d tex_terrain_colours = { .path = "textures/gradients.qoi",
  19                                  .flags = VG_TEXTURE_CLAMP | VG_TEXTURE_NEAREST
  20 };
  21 vg_tex2d tex_terrain_noise = { .path = "textures/garbage.qoi",
  22                                  .flags = VG_TEXTURE_NEAREST };
  23
  24 static struct
  25 {
  26    glmesh skydome;
  27    submodel dome_upper,
  28             dome_lower;
  29 }
  30 trender;
  31
  32 static void terrain_register(void)
  33 {
  34    shader_terrain_register();
  35    shader_sky_register();
  36    shader_planeinf_register();
  37 }
  38
  39 static void terrain_init(void)
  40 {
  41    vg_tex2d_init( (vg_tex2d *[]){ &tex_terrain_colours,
  42                                   &tex_terrain_noise }, 2 );
  43
  44
  45    model *msky = vg_asset_read("models/rs_skydome.mdl");
  46    model_unpack( msky, &trender.skydome );
  47
  48    trender.dome_lower = *submodel_get( msky, "dome_lower" );
  49    trender.dome_upper = *submodel_get( msky, "dome_upper" );
  50
  51    free(msky);
  52 }
  53
  54 static void bind_terrain_textures(void)
  55 {
  56    vg_tex2d_bind( &tex_terrain_noise, 0 );
  57    vg_tex2d_bind( &tex_terrain_colours, 1 );
  58 }
  59
  60 static void render_terrain(m4x4f projection, v3f camera)
  61 {
  62    shader_terrain_use();
  63    shader_terrain_uTexGarbage(0);
  64    shader_terrain_uTexGradients(1);
  65
  66    vg_tex2d_bind( &tex_terrain_noise, 0 );
  67    vg_tex2d_bind( &tex_terrain_colours, 1 );
  68
  69    m4x3f identity_matrix;
  70    m4x3_identity( identity_matrix );
  71    shader_terrain_uPv( projection );
  72    shader_terrain_uMdl( identity_matrix );
  73    shader_terrain_uCamera( camera );
  74    shader_terrain_uPlane( (v4f){ 0.0f,1.0f,0.0f, wrender.height } );
  75
  76    glActiveTexture( GL_TEXTURE2 );
  77    glBindTexture( GL_TEXTURE_2D, wrender.depthmap );
  78    shader_terrain_uTexDepth( 2 );
  79    shader_terrain_uDepthBounds( (v4f){
  80          wrender.depthbounds[0][0],
  81          wrender.depthbounds[0][2],
  82          1.0f/ (wrender.depthbounds[1][0]-wrender.depthbounds[0][0]),
  83          1.0f/ (wrender.depthbounds[1][2]-wrender.depthbounds[0][2])} );
  84 }
  85
  86 static void render_lowerdome( m4x3f camera )
  87 {
  88    m4x4f projection, full;
  89    pipeline_projection( projection, 0.4f, 1000.0f );
  90
  91    m4x3f inverse;
  92    m3x3_transpose( camera, inverse );
  93    v3_copy((v3f){0.0f,0.0f,0.0f}, inverse[3]);
  94    m4x3_expand( inverse, full );
  95    m4x4_mul( projection, full, full );
  96
  97    m4x3f identity_matrix;
  98    m4x3_identity( identity_matrix );
  99
 100    shader_planeinf_use();
 101    shader_planeinf_uMdl(identity_matrix);
 102    shader_planeinf_uPv(full);
 103    shader_planeinf_uCamera(camera[3]);
 104    shader_planeinf_uPlane( (v4f){0.0f,1.0f,0.0f, water_height()} );
 105
 106    submodel_draw( &trender.dome_lower );
 107 }
 108
 109 static void render_sky(m4x3f camera)
 110 {
 111    m4x4f projection, full;
 112    pipeline_projection( projection, 0.4f, 1000.0f );
 113
 114    m4x3f inverse;
 115    m3x3_transpose( camera, inverse );
 116    v3_copy((v3f){0.0f,0.0f,0.0f}, inverse[3]);
 117    m4x3_expand( inverse, full );
 118    m4x4_mul( projection, full, full );
 119
 120    m4x3f identity_matrix;
 121    m4x3_identity( identity_matrix );
 122
 123    shader_sky_use();
 124    shader_sky_uMdl(identity_matrix);
 125    shader_sky_uPv(full);
 126    shader_sky_uTexGarbage(0);
 127    shader_sky_uTime( vg_time );
 128
 129
 130    vg_tex2d_bind( &tex_terrain_noise, 0 );
 131
 132    glDepthMask(GL_FALSE);
 133    glDisable(GL_DEPTH_TEST);
 134
 135    mesh_bind( &trender.skydome );
 136    submodel_draw( &trender.dome_upper );
 137
 138    glEnable(GL_DEPTH_TEST);
 139    glDepthMask(GL_TRUE);
 140 }
 141
 142 #endif
 143 #endif