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

   1 #include <GL/glew.h>
   2
   3 #include "global.h"
   4
   5 #include "camera.h"
   6 #include "mesh.h"
   7 #include "object.h"
   8 #include "renderer.h"
   9 #include "scene.h"
  10 #include "shader.h"
  11 #include "shader_manager.h"
  12 #include "texture.h"
  13
  14 Renderer::Renderer()
  15 {
  16         scene = 0;
  17         camera = 0;
  18         sprog = 0;
  19 }
  20
  21 Renderer::~Renderer()
  22 {
  23 }
  24
  25 bool Renderer::create()
  26 {
  27         if(!(sprog = sdr_man->create_shader_program("default.v.glsl", "default.f.glsl"))) {
  28                 return false;
  29         }
  30
  31         if(!(sprog->link())) {
  32                 return false;
  33         }
  34
  35         /* getting material uniform locations: diffuse, specular, specular exponent (strength) */
  36
  37         if((diff_loc = sprog->get_uniform_location("diffuse")) == -1) {
  38                 fprintf(stderr, "Invalid uniform location: can't find \"diffuse\".\n");
  39                 return false;
  40         }
  41
  42         if((spec_loc = sprog->get_uniform_location("specular")) == -1) {
  43                 fprintf(stderr, "Invalid uniform location: can't find \"specular\".\n");
  44                 return false;
  45         }
  46
  47         if((shin_loc = sprog->get_uniform_location("shininess")) == -1) {
  48                 fprintf(stderr, "Invalid uniform location: can't find \"shininess\".\n");
  49                 return false;
  50         }
  51
  52         /* uniform locations for matrices */
  53
  54         if((mmviewproj_loc = sprog->get_uniform_location("mmviewproj")) == -1) {
  55                 fprintf(stderr, "Invalid uniform location: can't find \"mmviewproj\".\n");
  56                 return false;
  57         }
  58
  59         if((mview_loc = sprog->get_uniform_location("mview")) == -1) {
  60                 fprintf(stderr, "Invalid uniform location: can't find \"mview\".\n");
  61                 return false;
  62         }
  63
  64         return true;
  65 }
  66
  67 void Renderer::draw() const
  68 {
  69         if(!camera || !scene)
  70                 return;
  71
  72         glClearColor(0.5, 0.5, 0.5, 1);
  73         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  74
  75         if(!sprog->link())
  76                 return;
  77
  78         sprog->use();
  79
  80         for(size_t i=0; i<scene->objects.size(); i++) {
  81                 draw_object(scene->objects[i]);
  82         }
  83 }
  84
  85 void Renderer::draw_object(Object *object) const
  86 {
  87         Material *m = object->material;
  88
  89         /* setting uniforms for material */
  90
  91         sprog->set_uniformf(diff_loc, m->diffuse.x, m->diffuse.y, m->diffuse.z, 1);
  92         sprog->set_uniformf(spec_loc, m->specular.x, m->specular.y, m->specular.z, 1);
  93         sprog->set_uniformf(shin_loc, m->shininess);
  94
  95         /* texture */
  96
  97         if (m->dtex)
  98                 m->dtex->bind();
  99
 100         /* setting uniforms for matrices */
 101
 102         Mat4 mmviewproj = object->transform * camera->get_view_matrix() * mprojection;
 103         sprog->set_uniform_matrix(mmviewproj_loc, mmviewproj);
 104
 105         Mat4 mview = object->transform * camera->get_view_matrix();
 106         sprog->set_uniform_matrix(mview_loc, mview);
 107
 108         object->mesh->update_vertex_data();
 109         object->mesh->draw();
 110 }