public class lwjgl_test {
    static int vaoID;
    static int vboID;
    public static void create(String name){
        try{
            System.out.println("Window Creation");
            Display.setDisplayMode(new DisplayMode(800, 600));
        //  Display.setVSyncEnabled(true);
            Display.setTitle(name);
            Display.create(new PixelFormat(), new ContextAttribs(3, 2).withForwardCompatible(true).withProfileCore(true));
            System.out.println("OpenGL version: " + GL11.glGetString(GL11.GL_VERSION));
        }
        catch(LWJGLException e){
            e.printStackTrace();
            System.exit(-1);
        }
        GL11.glClearColor(0.4f, 0.6f, 0.9f, 0f);
        GL11.glViewport(0, 0, 800, 600);

        setupQuad();
        render();
    }
    public static void setupQuad(){
        float[] vertices = {
                // Left bottom triangle
                -0.5f, 0.5f, 0f,
                -0.5f, -0.5f, 0f,
                0.5f, -0.5f, 0f,
                // Right top triangle
                0.5f, -0.5f, 0f,
                0.5f, 0.5f, 0f,
                -0.5f, 0.5f, 0f
        };
        FloatBuffer verticesBuf = BufferUtils.createFloatBuffer(vertices.length);
        verticesBuf.put(vertices);
        verticesBuf.flip();
        int vertexcount = 6;

        vaoID = GL30.glGenVertexArrays();
        GL30.glBindVertexArray(vaoID);
        vboID = GL15.glGenBuffers();
        GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, vboID);

        GL15.glBufferData(GL15.GL_ARRAY_BUFFER, verticesBuf, GL15.GL_STATIC_DRAW);
        GL20.glVertexAttribPointer(0 ,3 , GL11.GL_FLOAT, false, 0, 0);

        // debind
        GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, 0);
        GL30.glBindVertexArray(0);

    }
    public static void render(){
        while(!Display.isCloseRequested()){
            update();
            GL30.glBindVertexArray(vaoID);
            GL20.glEnableVertexAttribArray(0);

            GL11.glDrawArrays(GL11.GL_TRIANGLES, 0, 6);

            GL20.glDisableVertexAttribArray(0);
            GL30.glBindVertexArray(0);

        }
        clean();
    }
    public static void update(){
        GL11.glClear(GL11.GL_COLOR_BUFFER_BIT);
        Display.sync(60);
        Display.update();
    }
    public static void clean(){
        GL20.glDisableVertexAttribArray(0);
        GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, 0);
        GL15.glDeleteBuffers(vboID);
        GL30.glBindVertexArray(0);
        GL30.glDeleteVertexArrays(vaoID);
    }
    public static void main(String[] args) {
        create("LWJGL");
    }
}