Notes

package engineTester;

import org.lwjgl.opengl.Display;

import gameEngine.Loading;
import gameEngine.Rendering;
import gameEngine.displayManager;
import gameEngine.rawModel;

public class mainGameLoop {
public static void main(String[] args) {

displayManager.createDisplay();

Loading loader = new Loading();
Rendering renderer = new Rendering();

float[] vertices = {
-0.5f, 0.5f, 0f,
-0.5f, -0.5f, 0f,
0.5f, -0.5f, 0f,
0.5f, -0.5f, 0f,
0.5f, 0.5f, 0f,
-0.5f, 0.5f, 0f
};

rawModel model = loader.loadToVAO(vertices);

while(!Display.isCloseRequested()){
renderer.prepare();
//gamelogic
renderer.render(model);
displayManager.updateDisplay();
}
loader.cleanUp();
displayManager.closeDisplay();

}
}


//displayManager
package gameEngine;

import org.lwjgl.LWJGLException;
import org.lwjgl.opengl.ContextAttribs;
import org.lwjgl.opengl.Display;
import org.lwjgl.opengl.DisplayMode;
import org.lwjgl.opengl.GL11;
import org.lwjgl.opengl.PixelFormat;
public class displayManager {
private static final int WIDTH = 1280;
private static final int HEIGHT = 702;
private static final int fps_cap = 120;
private static final String newTitle = "Space";
public static void createDisplay(){
ContextAttribs attribs = new ContextAttribs(3,2).withForwardCompatible(true).withProfileCore(true);
try {
Display.setDisplayMode(new DisplayMode(WIDTH,HEIGHT));
Display.create(new PixelFormat(), attribs);
Display.setTitle(newTitle);
} catch (LWJGLException e) {
e.printStackTrace();
}
GL11.glViewport(0, 0, WIDTH, HEIGHT);
}
public static void updateDisplay(){
Display.sync(fps_cap);
Display.update();
}
public static void closeDisplay(){
Display.destroy();
}
}
//Loading
package gameEngine;

import java.nio.FloatBuffer;
import java.util.ArrayList;
import java.util.List;

import org.lwjgl.BufferUtils;
import org.lwjgl.opengl.GL11;
import org.lwjgl.opengl.GL15;
import org.lwjgl.opengl.GL20;
import org.lwjgl.opengl.GL30;

public class Loading {

private List<Integer> vaos = new ArrayList<Integer>();
private List<Integer> vbos = new ArrayList<Integer>();


public rawModel loadToVAO(float[] positions){
int vaoID = createVAO();
storeDataInAttributeList(0,positions);
unbindVAO();
return new rawModel(vaoID,positions.length/3);
}

public void cleanUp(){
for(int vao:vaos){
GL30.glDeleteVertexArrays(vao);
}
for(int vbo:vbos){
GL15.glDeleteBuffers(vbo);
}
}

private int createVAO(){

int vaoID = GL30.glGenVertexArrays();
vaos.add(vaoID);
GL30.glBindVertexArray(vaoID);
return vaoID;

}
private void storeDataInAttributeList(int attributeNumber, float[] data){
int vboID = GL15.glGenBuffers();
vbos.add(vboID);
GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, vboID);
FloatBuffer buffer = storeDataInFloatBuffer(data);
GL15.glBufferData(GL15.GL_ARRAY_BUFFER,buffer,GL15.GL_STATIC_DRAW);
GL20.glVertexAttribPointer(attributeNumber, 3, GL11.GL_FLOAT, false, 0,0);
GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, 0);
}

private void unbindVAO(){
GL30.glBindVertexArray(0);
}

private FloatBuffer storeDataInFloatBuffer(float[] data){
FloatBuffer buffer = BufferUtils.createFloatBuffer(data.length);
buffer.put(data);
buffer.flip();
return buffer;
}
}
//rawModel
package gameEngine;
public class rawModel {
private int vaoID;
private int vertexCount;

public rawModel(int vaoID, int vertexCount) {
this.vaoID = vaoID;
this.vertexCount = vertexCount;
}

public int getVaoID() {
return vaoID;
}

public int getVertexCount() {
return vertexCount;
}
}
//rendering
package gameEngine;

import org.lwjgl.opengl.GL11;
import org.lwjgl.opengl.GL20;
import org.lwjgl.opengl.GL30;

public class Rendering {

public void prepare(){
GL11.glClearColor(1, 0, 0, 1);
GL11.glClear(GL11.GL_COLOR_BUFFER_BIT);
}

public void render(rawModel model){
GL30.glBindVertexArray(model.getVaoID());
GL20.glEnableVertexAttribArray(0);
GL11.glDrawArrays(GL11.GL_TRIANGLES, 0, model.getVertexCount());
GL20.glDisableVertexAttribArray(0);
GL30.glBindVertexArray(0);
}
}