[ADD] custom rendering system

src/renderEngine/Renderer.cpp

@@ -0,0 +1,68 @@
+#include <GL/glew.h>
+#include <glm/gtc/matrix_transform.hpp>
+#include <iostream>
+#include "../models/Model.h"
+#include "Renderer.h"
+#include "../toolbox/Toolbox.h"
+
+namespace renderEngine
+{
+	namespace renderer
+	{
+		static const float FOV = 70.0f;
+		static const float NEAR_PLANE = 0.01f;
+		static const float FAR_PLANE = 1000.0f;
+
+		/*
+			This function will load the projectionMatrix into the shader
+		 */
+		void Init(shaders::StaticShader& shader)
+		{
+			const glm::mat4 projectionMatrix = 
+				glm::perspective(glm::radians(FOV), (WINDOW_WIDTH / WINDOW_HEIGT), NEAR_PLANE, FAR_PLANE);
+			
+			shader.start();
+			shader.loadProjectionMatrix(projectionMatrix);
+			shader.stop();
+		}
+
+		/*
+		 	This function will clear the screen.
+		*/
+		void Prepare()
+		{
+			glEnable(GL_DEPTH_TEST);
+			glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+			glClearColor(0.3f, 0.4f, 0.6f, 1.0f);
+		}
+
+		/*
+			This function will Render a Model on the screen.
+		*/
+		void Render(entities::Entity& entity, shaders::StaticShader& shader)
+		{
+			const models::TexturedModel model = entity.getModel();
+			const models::RawModel rawModel = model.rawModel;
+
+			// Enable the model
+			glBindVertexArray(rawModel.vaoID);
+
+			// Enable the inputs for the vertexShader
+			glEnableVertexAttribArray(0);
+			glEnableVertexAttribArray(1);
+
+			// Load the transformation of the model into the shader
+			const glm::mat4 modelMatrix = toolbox::createModelMatrix(entity.getPosition(), entity.getRotation(), entity.getScale());
+			shader.loadModelMatrix(modelMatrix);
+			
+			// Draw the model
+			glActiveTexture(GL_TEXTURE0);
+			glBindTexture(GL_TEXTURE_2D, model.texture.textureID);
+			glDrawElements(GL_TRIANGLES, rawModel.vertexCount, GL_UNSIGNED_INT, 0);
+			
+			glDisableVertexAttribArray(0);
+			glDisableVertexAttribArray(1);
+			glBindVertexArray(0);
+		}
+	}
+}