CG lab 7

package cg.bouncysquare;

import android.app.Activity;
import android.opengl.GLSurfaceView;
import android.os.Bundle;
import android.view.WindowManager;

public class BouncySquareActivity extends Activity
{
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
        GLSurfaceView view = new GLSurfaceView(this);
        view.setRenderer(new SquareRenderer(this.getApplicationContext()));
        setContentView(view);
    }
}

//--------------------------------
package cg.bouncysquare;

import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;
import javax.microedition.khronos.opengles.GL10;
import javax.microedition.khronos.opengles.GL11;
import android.graphics.*;
import android.opengl.*;
import android.content.Context;
class Square
{
    private FloatBuffer mFVertexBuffer;
    private ByteBuffer mColorBuffer;
    private ByteBuffer mIndexBuffer;
    private int[] textures=new int[1];
    public FloatBuffer mTextureBuffer;
    float[] textureCoords={
            0.0f, 2.0f,
            2.0f, 2.0f,
            0.0f, 0.0f,
            2.0f, 0.0f
    };

    public Square()
    {


        float vertices[] =
                {
                        -1.0f, -0.7f,
                        1.0f, -0.30f,
                        -1.0f, 0.70f,
                        1.0f, 0.30f
                };
        byte maxColor=(byte)255;
        byte colors[] =
                {
                        0, 0, 0,maxColor,
                        maxColor,0, 0,maxColor,
                        0, 0, 0,maxColor,
                        maxColor,0, 0,maxColor,
                };
        byte indices[] =
                {
                        0, 3, 1,
                        0, 2, 3
                };
        ByteBuffer vbb = ByteBuffer.allocateDirect(vertices.length * 4);
        vbb.order(ByteOrder.nativeOrder());
        mFVertexBuffer = vbb.asFloatBuffer();
        mFVertexBuffer.put(vertices);
        mFVertexBuffer.position(0);
        mColorBuffer = ByteBuffer.allocateDirect(colors.length);
        mColorBuffer.put(colors);
        mColorBuffer.position(0);
        mIndexBuffer = ByteBuffer.allocateDirect(indices.length);
        mIndexBuffer.put(indices);
        mIndexBuffer.position(0);

        ByteBuffer tbb=ByteBuffer.allocateDirect(textureCoords.length*4);
        tbb.order(ByteOrder.nativeOrder());
        mTextureBuffer=tbb.asFloatBuffer();
        mTextureBuffer.put(textureCoords);
        mTextureBuffer.position(0);
    }

    public void draw(GL10 gl)
    {
        gl.glFrontFace(GL11.GL_CW);
        gl.glVertexPointer(2, GL11.GL_FLOAT, 0, mFVertexBuffer);
        gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
        //gl.glColorPointer(4, GL11.GL_UNSIGNED_BYTE, 0, mColorBuffer);
        gl.glEnableClientState(GL10.GL_COLOR_ARRAY);
        gl.glDrawElements(GL11.GL_TRIANGLES, 6, GL11.GL_UNSIGNED_BYTE, mIndexBuffer);
        gl.glFrontFace(GL11.GL_CCW);

        gl.glVertexPointer(2, GL10.GL_FLOAT,0,mFVertexBuffer);
        gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
        //gl.glColorPointer(4,GL10.GL_UNSIGNED_BYTE,0,mColorBuffer);
        gl.glEnableClientState(GL10.GL_COLOR_ARRAY);
        gl.glEnable(GL10.GL_TEXTURE_2D);
        gl.glEnable(GL10.GL_BLEND);
        gl.glBlendFunc(GL10.GL_ONE, GL10.GL_SRC_COLOR);
        gl.glBindTexture(GL10.GL_TEXTURE_2D, textures[0]);
        gl.glTexCoordPointer(2,GL10.GL_FLOAT,0, mTextureBuffer);
        gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY);

    }

    public void createTexture(GL10 gl, Context contextRegf, int resource){

        Bitmap image = BitmapFactory.decodeResource(contextRegf.getResources(), resource);
        gl.glGenTextures(1, textures, 0);
        gl.glBindTexture(GL10.GL_TEXTURE_2D, textures[0]);
        GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, image, 0);
        gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_LINEAR);
        gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MAG_FILTER, GL10.GL_LINEAR);
        image.recycle();
    }
}
//----------------------------------
package cg.bouncysquare;

import javax.microedition.khronos.egl.EGLConfig;
import javax.microedition.khronos.opengles.GL10;
import android.opengl.GLSurfaceView;
import java.lang.Math;
import android.content.Context;

class SquareRenderer implements GLSurfaceView.Renderer
{
    private Square mSquare;
    private float mTransY;
    private Context context;

    public SquareRenderer(Context context)
    {
        this.context=context;
        this.mSquare = new Square();
    }

    public void onDrawFrame(GL10 gl)
    {
        gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);
        gl.glMatrixMode(GL10.GL_MODELVIEW);
        gl.glLoadIdentity();
        gl.glTranslatef(0.0f,(float)Math.sin(mTransY), -3.0f);
        mSquare.draw(gl);
        mTransY += .075f;
    }

    public void onSurfaceChanged(GL10 gl, int width, int height)
    {
        gl.glViewport(0, 0, width, height);
        float ratio = (float) width / height;
        gl.glMatrixMode(GL10.GL_PROJECTION);
        gl.glLoadIdentity();
        gl.glFrustumf(-ratio, ratio, -1, 1, 1, 10);
    }
    public void onSurfaceCreated(GL10 gl, EGLConfig config)
    {
        int resid=R.drawable.hedly;
        mSquare.createTexture(gl, this.context, resid);
        gl.glDisable(GL10.GL_DITHER);
        gl.glHint(GL10.GL_PERSPECTIVE_CORRECTION_HINT,
                GL10.GL_FASTEST);
        gl.glClearColor(0,0,0,0);
        gl.glEnable(GL10.GL_CULL_FACE);
        gl.glShadeModel(GL10.GL_SMOOTH);
        gl.glEnable(GL10.GL_DEPTH_TEST);
    }
}