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