src/render_engine.cpp

   1 #include <stdexcept>
   2 #include <glm/gtc/matrix_transform.hpp>
   3 #include "FrustumCull.h"
   4 #include "camera.hpp"
   5 #include "input_handler.hpp"
   6 #include "render_engine.hpp"
   7 #include "scene.hpp"
   8 #include "shader_program.hpp"
   9 #include "window.hpp"
  10
  11 using namespace std;
  12 using namespace glm;
  13 using namespace dragonblocks;
  14
  15 void RenderEngine::render(double dtime)
  16 {
  17         glClearColor(sky.r, sky.g, sky.b, 1.0); CHECKERR
  18
  19         /*
  20                 glEnable(GL_CULL_FACE); CHECKERR
  21                 glCullFace(GL_BACK); CHECKERR
  22                 glFrontFace(GL_CW); CHECKERR
  23         */
  24
  25         glEnable(GL_DEPTH_TEST); CHECKERR
  26         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); CHECKERR
  27
  28
  29         dvec2 window_size = window->getSize();
  30         mat4 projection_matrix = perspective(radians(fov), window_size.x / window_size.y, 0.01, render_distance);
  31
  32         mat4 view_matrix = camera->getViewMatrix();
  33
  34         Frustum frustum(projection_matrix * view_matrix);
  35
  36         scene->render(dtime, &frustum, projection_matrix, view_matrix, sky);
  37
  38         window->swapBuffers(); CHECKERR
  39         glfwPollEvents(); CHECKERR
  40 }
  41
  42 bool RenderEngine::running()
  43 {
  44         return ! window->shouldClose();
  45 }
  46
  47 RenderEngine::RenderEngine()
  48 {
  49         if (! glfwInit()) {
  50                 throw runtime_error("Failed to initialize GLFW");
  51         }
  52
  53         glfwWindowHint(GLFW_SAMPLES, 8);
  54         glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
  55         glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
  56         glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
  57
  58         window = Window::create(this);
  59         camera = new Camera;
  60         scene = new Scene;
  61
  62         GLenum glew_init_err = glewInit();
  63         if (glew_init_err != GLEW_OK) {
  64                 throw runtime_error("Failed to initialize GLEW");
  65         }
  66 }
  67
  68 RenderEngine::~RenderEngine()
  69 {
  70         delete window;
  71         delete camera;
  72         delete scene;
  73 }