Frustum & Backface Culling

[dragonblocks3d.git] / src / dragonblocks / render_engine.cpp

diff --git a/src/dragonblocks/render_engine.cpp b/src/dragonblocks/render_engine.cpp
index 5476bd106c7f71aab07bfe30c26baf58a197fcda..fb23d35179225aab5e5cd5d47307883d8becdb09 100644 (file)
--- a/src/dragonblocks/render_engine.cpp
+++ b/src/dragonblocks/render_engine.cpp
@@ -1,5 +1,6 @@
 #include <stdexcept>
 #include <glm/gtc/matrix_transform.hpp>
+#include "FrustumCull.h"
 #include "camera.hpp"
 #include "gldebug.hpp"
 #include "input_handler.hpp"
@@ -21,11 +22,16 @@ void RenderEngine::render()
        input_handler->processInput(dtime);
        
        glEnable(GL_DEPTH_TEST); CHECKERR
+       glEnable(GL_CULL_FACE); CHECKERR
+       glCullFace(GL_BACK); CHECKERR
+       glFrontFace(GL_CW); CHECKERR
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); CHECKERR
 
        updateViewMatrix();     CHECKERR
        
-       scene->render(dtime, shader_program);
+       Frustum frustum(projection_matrix * view_matrix);
+       
+       scene->render(dtime, shader_program, &frustum);
        
        window->swapBuffers(); CHECKERR
        glfwPollEvents(); CHECKERR
@@ -39,13 +45,14 @@ bool RenderEngine::running()
 void RenderEngine::updateProjectionMatrix()
 {
        dvec2 bounds = window->getSize();
-       mat4 projection_matrix = perspective(radians(fov), bounds.x / bounds.y, 0.01, render_distance);
+       projection_matrix = perspective(radians(fov), bounds.x / bounds.y, 0.01, render_distance);
        shader_program->set("projection", projection_matrix); CHECKERR
 }
 
 void RenderEngine::updateViewMatrix()
 {
-       shader_program->set("view", camera->getViewMatrix()); CHECKERR
+       view_matrix = camera->getViewMatrix();
+       shader_program->set("view", view_matrix); CHECKERR
 }
 
 void RenderEngine::setSky(vec3 sky)