[Add] Added main game methods.

src/Main/GLWindow.cpp

@@ -235,4 +235,5 @@ float GLWindow::GetElapsedSeconds(void) {
 	unsigned int diff = currentTime - _lastTime;
 	_lastTime = currentTime;
 	return float(diff) / 1000.0f);
-}						
+}				
+		

src/Main/Game.cpp

@@ -0,0 +1,64 @@
+#ifdef _WIN32_
+#include <windows.h>
+#endif
+
+#include <GL/gl.h>
+#include <GL/glu.h>
+
+#include "Game.h"
+
+Game::Game(void) {
+	_rotationAngle = 0.0f;
+}
+
+Game::~Game(void) {
+
+}
+
+bool Game::Init(void) {
+	glEnable(GL_DEPTH_TEST);
+	glDepthFunc(GL_LEQUAL);
+	
+	// Return success.
+	return true;
+}
+
+void Game::Prepare(float dt) {
+	const float SPEED = 15.0f;
+	_rotationAngle += SPEED*dt;
+	if(_rotationAngle > 360.0f) {
+		_rotationAngle -= 360.0f;
+	}
+}
+
+void Game::Render(void) {
+	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+	glLoadIdentity();
+	
+	glRotatef(_rotationAngle, 0, 0, 1);
+	
+	glBegin(GL_TRIANGLES);
+		glColor4f(1.0f, 0.0f, 0.0f, 1.0f);
+		glVertex3f(-1.0f, -0.5f, -4.0f);
+		glColor4f(1.0f, 1.0f, 0.0f, 1.0f);
+		glVertex3f(1.0f, -0.5f, -4.0f);
+		glColor4f(0.0f, 0.0f, 1.0f, 1.0f);
+		glVertex3f(0.0f, 0.5f, -4.0f);
+	glEnd();
+}
+
+void Game::Shutdown(void) {
+	
+}
+
+void Game::OnResize(int width, int height) {
+	glViewport(0, 0, width, height);
+	
+	glMatrixMode(GL_PROJECTION);
+	glLoadIdentity();
+	
+	gluPerspective(45.0f, float(width) / float(height), 1.0f, 100.0f);
+	
+	glMatrixMode(GL_MODELVIEW);
+	glLoadIdentity();
+}

src/Main/Game.h

@@ -0,0 +1,17 @@
+#pragma once
+
+class Game {
+public:
+	Game(void);
+	~Game(void);
+	
+	bool Init(void);
+	void Prepare(float dt);
+	void Render(void);
+	void Shutdown(void);
+	
+	void OnResize(int width, int height);
+	
+private:
+	float _rotationAngle;
+};