git.mutantstargoat.com Git - demo/blob - src/renderer.cc

   1 #include <GL/glew.h>
   2 #include <gmath/gmath.h>
   3
   4 #include "global.h"
   5 #include "gfxapi.h"
   6
   7 #include "camera.h"
   8 #include "mesh.h"
   9 #include "meshgen.h"
  10 #include "object.h"
  11 #include "renderer.h"
  12 #include "scene.h"
  13 #include "shader.h"
  14 #include "shader_manager.h"
  15 #include "texture.h"
  16
  17 #undef DRAW_NORMALS
  18
  19 /* skybox */
  20
  21 static Mesh *skymesh; /* it will be used by many renderers => no destroy */
  22 static ShaderProgram *skyprog;
  23 static int viewproj_loc;
  24
  25 Renderer::Renderer()
  26 {
  27         scene = 0;
  28         camera = 0;
  29         sprog = 0;
  30
  31         skytex = 0;
  32         dskytex = 0;
  33
  34         fog_density = 0;
  35 }
  36
  37 Renderer::~Renderer()
  38 {
  39 }
  40
  41 bool Renderer::create()
  42 {
  43         //debug
  44         if(!(nprog = sdr_man->create_shader_program("debug.v.glsl", "debug.f.glsl"))) {
  45                 fprintf(stderr, "Failed to load debug shaders.\n");
  46         }
  47
  48         if(!(sprog = sdr_man->create_shader_program("default.v.glsl", "default.f.glsl"))) {
  49                 return false;
  50         }
  51
  52         /* getting material uniform locations: diffuse, specular, specular exponent (strength) */
  53
  54         diff_loc = sprog->get_uniform_location("diffuse");
  55         spec_loc = sprog->get_uniform_location("specular");
  56         shin_loc = sprog->get_uniform_location("shininess");
  57         fog_loc = sprog->get_uniform_location("fog_density");
  58
  59         /* uniform locations for matrices */
  60
  61         mmviewproj_loc = sprog->get_uniform_location("mmviewproj");
  62         mview_loc = sprog->get_uniform_location("mview");
  63         mmod_loc = sprog->get_uniform_location("mmod");
  64
  65         /* skybox, irradiance map uniforms */
  66
  67         stex_loc = sprog->get_uniform_location("stex");
  68         dstex_loc = sprog->get_uniform_location("dstex");
  69
  70         if(stex_loc != -1)
  71                 sprog->set_uniformi(stex_loc, 0);
  72
  73         if(dstex_loc != -1)
  74                 sprog->set_uniformi(dstex_loc, 1);
  75
  76         return true;
  77 }
  78
  79 void Renderer::draw() const
  80 {
  81         if(!camera || !scene)
  82                 return;
  83
  84         if(skytex) {
  85                 draw_skybox();
  86
  87                 if(dskytex) {
  88                         dskytex->bind(1);
  89                 }
  90         }
  91
  92         if(!sprog->link())
  93                 return;
  94
  95         sprog->use();
  96
  97         for(size_t i=0; i<scene->objects.size(); i++) {
  98                 draw_object(scene->objects[i]);
  99         }
 100 }
 101
 102 void Renderer::draw_object(Object *object) const
 103 {
 104         Material *m = object->material;
 105
 106         /* setting uniforms for material */
 107
 108         if(diff_loc != -1)
 109                 sprog->set_uniformf(diff_loc, m->diffuse.x, m->diffuse.y, m->diffuse.z, 1);
 110
 111         if(spec_loc != -1)
 112                 sprog->set_uniformf(spec_loc, m->specular.x, m->specular.y, m->specular.z, 1);
 113
 114         if(shin_loc != -1)
 115                 sprog->set_uniformf(shin_loc, m->shininess);
 116
 117         if(fog_loc != -1)
 118                 sprog->set_uniformf(fog_loc, fog_density);
 119
 120         /* texture */
 121
 122         if(m->dtex)
 123                 m->dtex->bind(0);
 124
 125         /* setting uniforms for matrices */
 126
 127         Mat4 mmviewproj = object->transform * camera->get_view_matrix() * mprojection;
 128         if(mmviewproj_loc != -1)
 129                 sprog->set_uniform_matrix(mmviewproj_loc, mmviewproj);
 130
 131         Mat4 mview = object->transform * camera->get_view_matrix();
 132         if(mview_loc != -1)
 133                 sprog->set_uniform_matrix(mview_loc, mview);
 134
 135         Mat4 mmod = object->transform.upper3x3();
 136         if(mmod_loc != -1)
 137                 sprog->set_uniform_matrix(mmod_loc, mmod);
 138
 139         object->mesh->draw();
 140
 141         // debug
 142 #ifdef DRAW_NORMALS
 143         if(nprog) {
 144                 int loc = nprog->get_uniform_location("mmviewproj");
 145                 if(loc != -1) {
 146                         nprog->set_uniform_matrix(loc, mmviewproj);
 147                 }
 148                 nprog->use();
 149                 object->mesh->draw_normals(1.0);
 150         }
 151 #endif
 152 }
 153
 154 void Renderer::set_sky_tex(Texture *stex)
 155 {
 156         if(!skymesh) {
 157                 skymesh = gfx_create_mesh();
 158                 gen_geosphere(skymesh, 1, 0);
 159         }
 160         if(!skyprog) {
 161                 if(!(skyprog = sdr_man->create_shader_program("sky.v.glsl", "sky.f.glsl")))
 162                         return;
 163                 if((viewproj_loc = skyprog->get_uniform_location("mviewproj") == -1))
 164                         return;
 165         }
 166         skytex = stex;
 167 }
 168
 169 void Renderer::set_diffuse_sky_tex(Texture *dstex)
 170 {
 171         dskytex = dstex;
 172 }
 173
 174 void Renderer::draw_skybox() const
 175 {
 176         if(!skymesh || !skytex)
 177                 return;
 178
 179         gfx_zbuffer(false);
 180         gfx_cull_face(GFX_CULL_NONE);
 181
 182         skytex->bind();
 183         skyprog->use();
 184
 185         Mat4 mviewproj;
 186         mviewproj = camera->get_view_matrix().upper3x3() * mprojection;
 187         skyprog->set_uniform_matrix(viewproj_loc, mviewproj);
 188
 189         skymesh->draw();
 190
 191         gfx_cull_face(GFX_CULL_BACK);
 192         gfx_zbuffer(true);
 193 }