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         //      fprin
  50         //      tf(stderr, "Failed to load debug shaders.\n");
  51         // }
  52
  53         vbuf = gfx_create_uniform_buffer();
  54         if(!vbuf->create(sizeof vu)) {
  55                 fprintf(stderr, "Failed to create uniform buffer.\n");
  56                 return false;
  57         }
  58
  59         fbuf = gfx_create_uniform_buffer();
  60         if(!fbuf->create(sizeof fu)) {
  61                 fprintf(stderr, "Failed to create uniform buffer.\n");
  62                 return false;
  63         }
  64
  65         svbuf = gfx_create_uniform_buffer();
  66         if(!svbuf->create(sizeof svu)) {
  67                 fprintf(stderr, "Failed to create uniform buffer.\n");
  68                 return false;
  69         }
  70
  71         if(!(sprog = sdr_man->create_shader_program("default.v.glsl", "default.f.glsl"))) {
  72                 return false;
  73         }
  74
  75         return true;
  76 }
  77
  78 void Renderer::draw()
  79 {
  80         if(!camera || !scene)
  81                 return;
  82
  83         if(skytex) {
  84                 draw_skybox();
  85
  86                 if(dskytex) {
  87                         dskytex->bind(1);
  88                 }
  89         }
  90
  91         if(!sprog->link())
  92                 return;
  93
  94         sprog->use();
  95
  96         for(size_t i=0; i<scene->objects.size(); i++) {
  97                 draw_object(scene->objects[i]);
  98         }
  99 }
 100
 101 void Renderer::draw_object(Object *object)
 102 {
 103         Material *m = object->material;
 104
 105         /* setting uniforms for material */
 106
 107         fu.diffuse = Vec4(m->diffuse.x, m->diffuse.y, m->diffuse.z, 1.0);
 108         fu.specular = Vec4(m->specular.x, m->specular.y, m->specular.z, 1.0);
 109         fu.shininess = m->shininess;
 110         fu.fog_density = fog_density;
 111
 112         fbuf->update(&fu);
 113         fbuf->bind(SHADING_UNIFORMS);
 114
 115         /* texture */
 116
 117         if(m->dtex)
 118                 m->dtex->bind(0);
 119
 120         /* setting uniforms for matrices */
 121
 122         vu.mview = object->transform * camera->get_view_matrix();
 123         vu.mmviewproj = object->transform * camera->get_view_matrix() * mprojection;
 124         vu.mmod = object->transform.upper3x3();
 125
 126         vbuf->update(&vu);
 127         vbuf->bind(MATRIX_UNIFORMS);
 128
 129         object->mesh->draw();
 130
 131         // debug
 132 #ifdef DRAW_NORMALS
 133         if(nprog) {
 134                 vu.mmviewproj = mmviewproj;
 135                 vbuf->update(&vu);
 136                 vbuf->bind(MATRIX_UNIFORMS);
 137
 138                 nprog->use();
 139                 object->mesh->draw_normals(1.0);
 140         }
 141 #endif
 142 }
 143
 144 void Renderer::set_sky_tex(Texture *stex)
 145 {
 146         if(!skymesh) {
 147                 skymesh = gfx_create_mesh();
 148                 gen_geosphere(skymesh, 1, 0);
 149         }
 150         if(!skyprog) {
 151                 if(!(skyprog = sdr_man->create_shader_program("sky.v.glsl", "sky.f.glsl")))
 152                         return;
 153         }
 154         skytex = stex;
 155 }
 156
 157 void Renderer::set_diffuse_sky_tex(Texture *dstex)
 158 {
 159         dskytex = dstex;
 160 }
 161
 162 void Renderer::draw_skybox()
 163 {
 164         if(!skymesh || !skytex)
 165                 return;
 166
 167         gfx_zbuffer(false);
 168         gfx_cull_face(GFX_CULL_NONE);
 169
 170         skytex->bind();
 171         skyprog->use();
 172
 173         svu.mviewproj = camera->get_view_matrix().upper3x3() * mprojection;
 174         svbuf->update(&svu);
 175         svbuf->bind(SKY_MATRIX_UNIFORMS);
 176
 177         skymesh->draw();
 178
 179         gfx_cull_face(GFX_CULL_BACK);
 180         gfx_zbuffer(true);
 181 }