package com.example.cube2GLDem;

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

import javax.microedition.khronos.opengles.GL10;


import android.content.Context;



public class CubeRenderer extends AbstractCubeRenderer
{
	private FloatBuffer mFVertexBuffer;
	private FloatBuffer mFColorBuffer;
	private ByteBuffer  mIndexBuffer;

	public CubeRenderer(Context context) 
	{

		float vertices[] = {
				-1.0f, -1.0f, -1.0f,
				1.0f, -1.0f, -1.0f,
				1.0f,  1.0f, -1.0f,
				-1.0f, 1.0f, -1.0f,
				-1.0f, -1.0f,  1.0f,
				1.0f, -1.0f,  1.0f,
				1.0f,  1.0f,  1.0f,
				-1.0f,  1.0f,  1.0f
		};
		float colors[] = {
				0.0f,  1.0f,  0.0f,  1.0f,
				0.0f,  1.0f,  0.0f,  1.0f,
				1.0f,  0.5f,  0.0f,  1.0f,
				1.0f,  0.5f,  0.0f,  1.0f,
				1.0f,  0.0f,  0.0f,  1.0f,
				1.0f,  0.0f,  0.0f,  1.0f,
				0.0f,  0.0f,  1.0f,  1.0f,
				1.0f,  0.0f,  1.0f,  1.0f
		};

		
		
		byte indices[] = {
				0, 4, 5, 0, 5, 1,
				1, 5, 6, 1, 6, 2,
				2, 6, 7, 2, 7, 3,
				3, 7, 4, 3, 4, 0,
				4, 7, 6, 4, 6, 5,
				3, 0, 1, 3, 1, 2
		};



		ByteBuffer vbb = ByteBuffer.allocateDirect(vertices.length * 4); //1 float= 4 octets
				vbb.order(ByteOrder.nativeOrder());
		mFVertexBuffer = vbb.asFloatBuffer();
		mFVertexBuffer.put(vertices);
		mFVertexBuffer.position(0);

		ByteBuffer cbb = ByteBuffer.allocateDirect(colors.length * 4); //1 float= 4 octets
				cbb.order(ByteOrder.nativeOrder());
		mFColorBuffer = cbb.asFloatBuffer();
		mFColorBuffer.put(colors);
		mFColorBuffer.position(0);

		mIndexBuffer = ByteBuffer.allocateDirect(indices.length);
		mIndexBuffer.put(indices);
		mIndexBuffer.position(0);
	}

   //overriden method
    public void draw(GL10 gl) {             
        gl.glFrontFace(GL10.GL_CW);
        
        gl.glVertexPointer(3, GL10.GL_FLOAT, 0, mFVertexBuffer);
        gl.glColorPointer(4, GL10.GL_FLOAT, 0, mFColorBuffer);
        
        gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
        gl.glEnableClientState(GL10.GL_COLOR_ARRAY);
         
        gl.glDrawElements(GL10.GL_TRIANGLES, 36, GL10.GL_UNSIGNED_BYTE, 
                        mIndexBuffer);
            
        gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);
        gl.glDisableClientState(GL10.GL_COLOR_ARRAY);
}
}