package com.scribblegame;

import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.IntBuffer;

import javax.microedition.khronos.opengles.GL10;
import android.content.Context;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.opengl.GLUtils;
import android.util.Log;


public class GLCube {
	private final IntBuffer mVertexBuffer;
	private final IntBuffer mTextureBuffer;
	public GLCube() {
		int one = 65536;
		int half = one/2;
		int vertices[] = {
				//Front
			-half, -half, half, half, -half, half,
			-half, half, half, half, half, half,
				//back
			-half, -half, -half, -half, half, -half,
			half, -half, -half, half, half, -half,
				//left
			-half, -half, half, -half, half, half,
			-half, -half, -half, -half, half, -half,
				//right
			half, -half, -half, half, half, -half,
			half, -half, half, half, half, half,
				//top
			-half, half, half, half, half, half,
			-half, half, -half, half, half, -half,
				//bottom
			-half, -half, half, -half, -half, -half,
			half, -half, half, half, -half, -half, };
		
		int texCoords[] = {
			      // FRONT
			      0, one, one, one, 0, 0, one, 0,
			      // BACK
			      one, one, one, 0, 0, one, 0, 0,
			      // LEFT
			      one, one, one, 0, 0, one, 0, 0,
			      // RIGHT
			      one, one, one, 0, 0, one, 0, 0,
			      // TOP
			      one, 0, 0, 0, one, one, 0, one,
			      // BOTTOM
			      0, 0, 0, one, one, 0, one, one, };

		
	ByteBuffer vbb = ByteBuffer.allocateDirect(vertices.length * 4);
	vbb.order(ByteOrder.nativeOrder());
	mVertexBuffer = vbb.asIntBuffer();
	mVertexBuffer.put(vertices);
	mVertexBuffer.position(0);
	Log.v("Got", "GLcube");
	
	ByteBuffer tbb = ByteBuffer.allocateDirect(texCoords.length * 4);
	tbb.order(ByteOrder.nativeOrder());
	mTextureBuffer = tbb.asIntBuffer();
	mTextureBuffer.put(texCoords);
	mTextureBuffer.position(0);

	}
	static void loadTexture(GL10 gl, Context context, int resource) {
		   Bitmap bmp = BitmapFactory.decodeResource(
		         context.getResources(), resource);
		   GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, bmp, 0);
		   gl.glTexParameterx(GL10.GL_TEXTURE_2D,
		         GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_LINEAR);
		   gl.glTexParameterx(GL10.GL_TEXTURE_2D,
		         GL10.GL_TEXTURE_MAG_FILTER, GL10.GL_LINEAR);
		   bmp.recycle();
		}

	
	public void draw(GL10 gl) {
		gl.glEnable(GL10.GL_TEXTURE_2D); // workaround bug 3623
		gl.glTexCoordPointer(2, GL10.GL_FIXED, 0, mTextureBuffer);

		
		
		gl.glVertexPointer(3, GL10.GL_FIXED, 0, mVertexBuffer);
		gl.glColor4f(1,1,1,1);
		gl.glNormal3f(0, 0, 1);
		gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, 4);
		gl.glNormal3f(0, 0, -1);
		gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 4, 4);
		
		gl.glColor4f(1,1,1,1);
		gl.glNormal3f(-1,0,0);
		gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 8, 4);	
		gl.glNormal3f(1,0,0);
		gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 12, 4);
		
		gl.glColor4f(1,1,1,1);
		gl.glNormal3f(0,1,0);
		gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 16, 4);	
		gl.glNormal3f(0,-1,0);
		gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 20, 4);
		
	}
}