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

   1 #include <GL/glew.h>
   2
   3 #include "global.h"
   4 #include "gfxapi.h"
   5
   6 #include "camera.h"
   7 #include "mesh.h"
   8 #include "meshgen.h"
   9 #include "object.h"
  10 #include "renderer.h"
  11 #include "scene.h"
  12 #include "shader.h"
  13 #include "shader_manager.h"
  14 #include "texture.h"
  15 #include "uniforms.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
  24 Renderer::Renderer()
  25 {
  26         scene = 0;
  27         camera = 0;
  28         sprog = 0;
  29
  30         skytex = 0;
  31         dskytex = 0;
  32
  33         fog_density = 0;
  34
  35         vbuf = fbuf = svbuf = 0;
  36 }
  37
  38 Renderer::~Renderer()
  39 {
  40         delete vbuf;
  41         delete fbuf;
  42         delete svbuf;
  43 }
  44
  45 bool Renderer::create()
  46 {
  47         //debug
  48         // if(!(nprog = sdr_man->create_shader_program("debug.v.glsl", "debug.f.glsl"))) {
  49         //      fprintf(stderr, "Failed to load debug shaders.\n");
  50         // }
  51
  52         vbuf = gfx_create_uniform_buffer();
  53         if(!vbuf->create(sizeof vu)) {
  54                 fprintf(stderr, "Failed to create uniform buffer.\n");
  55                 return false;
  56         }
  57
  58         fbuf = gfx_create_uniform_buffer();
  59         if(!fbuf->create(sizeof fu)) {
  60                 fprintf(stderr, "Failed to create uniform buffer.\n");
  61                 return false;
  62         }
  63
  64         svbuf = gfx_create_uniform_buffer();
  65         if(!svbuf->create(sizeof svu)) {
  66                 fprintf(stderr, "Failed to create uniform buffer.\n");
  67                 return false;
  68         }
  69
  70         if(!(sprog = sdr_man->create_shader_program("default.v.glsl", "default.f.glsl"))) {
  71                 return false;
  72         }
  73
  74         return true;
  75 }
  76
  77 void Renderer::draw()
  78 {
  79         if(!camera || !scene)
  80                 return;
  81
  82         if(skytex) {
  83                 draw_skybox();
  84
  85                 if(dskytex) {
  86                         dskytex->bind(1);
  87                 }
  88         }
  89
  90         if(!sprog->link())
  91                 return;
  92
  93         sprog->use();
  94
  95         for(size_t i=0; i<scene->objects.size(); i++) {
  96                 draw_object(scene->objects[i]);
  97         }
  98 }
  99
 100 void Renderer::draw_object(Object *object)
 101 {
 102         Material *m = object->material;
 103
 104         /* setting uniforms for material */
 105
 106         fu.diffuse = Vec4(m->diffuse.x, m->diffuse.y, m->diffuse.z, 1.0);
 107         fu.specular = Vec4(m->specular.x, m->specular.y, m->specular.z, 1.0);
 108         fu.shininess = m->shininess;
 109         fu.fog_density = fog_density;
 110
 111         fbuf->update(&fu);
 112         fbuf->bind(SHADING_UNIFORMS);
 113
 114         /* texture */
 115
 116         if(m->dtex)
 117                 m->dtex->bind(0);
 118
 119         /* setting uniforms for matrices */
 120
 121         vu.mview = object->transform * camera->get_view_matrix();
 122         vu.mmviewproj = object->transform * camera->get_view_matrix() * mprojection;
 123         vu.mmod = object->transform.upper3x3();
 124
 125         vbuf->update(&vu);
 126         vbuf->bind(MATRIX_UNIFORMS);
 127
 128         object->mesh->draw();
 129
 130         // debug
 131 #ifdef DRAW_NORMALS
 132         if(nprog) {
 133                 vu.mmviewproj = mmviewproj;
 134                 vbuf->update(&vu);
 135                 vbuf->bind(MATRIX_UNIFORMS);
 136
 137                 nprog->use();
 138                 object->mesh->draw_normals(1.0);
 139         }
 140 #endif
 141 }
 142
 143 void Renderer::set_sky_tex(Texture *stex)
 144 {
 145         if(!skymesh) {
 146                 skymesh = gfx_create_mesh();
 147                 gen_geosphere(skymesh, 1, 0);
 148         }
 149         if(!skyprog) {
 150                 if(!(skyprog = sdr_man->create_shader_program("sky.v.glsl", "sky.f.glsl")))
 151                         return;
 152         }
 153         skytex = stex;
 154 }
 155
 156 void Renderer::set_diffuse_sky_tex(Texture *dstex)
 157 {
 158         dskytex = dstex;
 159 }
 160
 161 void Renderer::draw_skybox()
 162 {
 163         if(!skymesh || !skytex)
 164                 return;
 165
 166         gfx_zbuffer(false);
 167         gfx_cull_face(GFX_CULL_NONE);
 168
 169         skytex->bind();
 170         skyprog->use();
 171
 172         svu.mviewproj = camera->get_view_matrix().upper3x3() * mprojection;
 173         svbuf->update(&svu);
 174         svbuf->bind(SKY_MATRIX_UNIFORMS);
 175
 176         skymesh->draw();
 177
 178         gfx_cull_face(GFX_CULL_BACK);
 179         gfx_zbuffer(true);
 180 }