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package com.badlogic.gamedev.samples;

import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;

import javax.microedition.khronos.opengles.GL10;

import android.os.Bundle;

import com.badlogic.gamedev.tools.GameActivity;
import com.badlogic.gamedev.tools.GameListener;

public class ColorSample2 extends GameActivity implements GameListener
{
	private FloatBuffer vertices;
	private FloatBuffer colors;
	
	public void onCreate( Bundle savedInstance )
	{
		super.onCreate( savedInstance );
		setGameListener( this );
	}
	
	@Override
	public void setup(GameActivity activity, GL10 gl) 
	{
		ByteBuffer buffer = ByteBuffer.allocateDirect( 3 * 4 * 3 );
		buffer.order(ByteOrder.nativeOrder());
		vertices = buffer.asFloatBuffer();
		
		vertices.put( -0.5f );
		vertices.put( -0.5f );
		vertices.put( 0 );
		
		vertices.put( 0.5f );
		vertices.put( -0.5f );
		vertices.put( 0 );
		
		vertices.put( 0 );
		vertices.put( 0.5f );
		vertices.put( 0 );
		
		vertices.rewind();
		
		buffer = ByteBuffer.allocateDirect( 3 * 4 * 4 );
		buffer.order(ByteOrder.nativeOrder());
		colors = buffer.asFloatBuffer();
		
		colors.put( 1 );
		colors.put( 0 );
		colors.put( 0 );
		colors.put( 1 );
		
		colors.put( 0 );
		colors.put( 1 );
		colors.put( 0 );
		colors.put( 1 );
		
		colors.put( 0 );
		colors.put( 0 );
		colors.put( 1 );
		colors.put( 1 );
		
		colors.rewind();
	}
	
	@Override
	public void mainLoopIteration(GameActivity activity, GL10 gl) 
	{	
		gl.glViewport( 0, 0, activity.getViewportWidth(), activity.getViewportHeight() );
		gl.glClear(GL10.GL_COLOR_BUFFER_BIT);
		
		gl.glEnableClientState(GL10.GL_VERTEX_ARRAY );    
		gl.glVertexPointer(3, GL10.GL_FLOAT, 0, vertices);
		gl.glEnableClientState(GL10.GL_COLOR_ARRAY );
		gl.glColorPointer( 4, GL10.GL_FLOAT, 0, colors );
		gl.glDrawArrays(GL10.GL_TRIANGLES, 0, 3);
	}
}