lab6cg

package cg.bouncysquare;

import android.opengl.GLSurfaceView;

import javax.microedition.khronos.egl.EGLConfig;
import javax.microedition.khronos.opengles.GL10;
import javax.microedition.khronos.opengles.GL11;
import android.content.Context;

/**
 * Created by P17-10 on 3/20/2017.
 */
public class SquareRenderer implements GLSurfaceView.Renderer{
    private final Context context;
    private Square mSquare;
    private Square mSquare2;
    private float mTransY;



    public SquareRenderer(Context context) {
        this.context = context;
        this.mSquare = new Square(1);
        this.mSquare2 = new Square(2);
    }

    @Override
    public void onSurfaceCreated(GL10 gl, EGLConfig config) {
        int resid = R.drawable.hedly;
        int resid2 = R.drawable.goldengate;
        mSquare.createTexture(gl, this.context, resid);
        mSquare2.createTexture(gl, this.context, resid2);
        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);
    }

    @Override
    public void onSurfaceChanged(GL10 gl, int width, int height) {
        gl.glViewport(0, 0, width, height);
        gl.glMatrixMode(GL10.GL_PROJECTION);

        gl.glLoadIdentity();
        float ratio = (float) width / height;

        gl.glFrustumf(-ratio, ratio, -1, 1, 1, 10);
    }

    @Override
    public void onDrawFrame(GL10 gl) {
        gl.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);

        gl.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT);
        gl.glEnable(GL10.GL_BLEND);


        gl.glMatrixMode(GL11.GL_MODELVIEW);
        gl.glLoadIdentity();
        gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);

        //gl.glEnableClientState(GL10.GL_COLOR_ARRAY);

        gl.glTranslatef(0.0f,(float)Math.sin(mTransY), -3.0f);

        gl.glColor4f(1.0f, 1.0f, 1.0f, 0.75f);
       // gl.glBlendFunc(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA);
        gl.glBlendFunc(GL10.GL_ONE, GL10.GL_ONE);
        mSquare.draw(gl);
        mTransY += .075f;
        gl.glLoadIdentity();
        gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);

        //gl.glEnableClientState(GL10.GL_COLOR_ARRAY);

        gl.glTranslatef((float)(Math.sin(mTransY)/2.0f),0.0f, -2.9f);

        gl.glColor4f(1.0f, 1.0f, 1.0f, 1.0f);

        mSquare2.draw(gl);

    }
}


****


package cg.bouncysquare;

import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;
import android.graphics.*;
import android.content.Context;

import android.opengl.*;

import javax.microedition.khronos.opengles.GL10;
import javax.microedition.khronos.opengles.GL11;

/**
 * Created by P17-10 on 3/20/2017.
 */
public class Square {

    private FloatBuffer mFVertexBuffer;

    private FloatBuffer mColorBuffer;

    private ByteBuffer mIndexBuffer;
    public FloatBuffer mTextureBuffer;
    private int[] textures = new int[1];

    public Square(int sw) {
        float squareColorsYMCA[] =

                {

                        1.0f, 1.0f, 0.0f, 1.0f,

                        0.0f, 1.0f, 1.0f, 1.0f,

                        0.0f, 0.0f, 0.0f, 1.0f,

                        1.0f, 0.0f, 1.0f, 1.0f

                };

        float squareColorsRGBA[] =

                {

                        1.0f, 0.0f, 0.0f, 1.0f,

                        0.0f, 1.0f, 0.0f, 1.0f,

                        0.0f, 0.0f, 1.0f, 1.0f,

                        1.0f, 1.0f, 1.0f, 1.0f

                };
        float vertices[] =

                {

                        -1.0f, -1.0f,

                        1.0f, -1.0f,

                        -1.0f, 1.0f,

                        1.0f, 1.0f

                };

        byte indices[] =

                {

                        0, 3, 1,

                        0, 2, 3

                };
        float[] textureCoords =
                {
                        0.0f, 0.0f,
                        1.0f, 0.0f,
                        0.0f, 1.0f,
                        1.0f, 1.0f
                };

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

        ByteBuffer vbb = ByteBuffer.allocateDirect(vertices.length * 4);
        ByteBuffer vbbYMCA = ByteBuffer.allocateDirect(squareColorsYMCA.length*4);
        vbb.order(ByteOrder.nativeOrder());
        vbbYMCA.order(ByteOrder.nativeOrder());

        mFVertexBuffer = vbb.asFloatBuffer();

        mFVertexBuffer.put(vertices);

        mFVertexBuffer.position(0);

        mColorBuffer = vbbYMCA.asFloatBuffer();

        if(sw==1)
        mColorBuffer.put(squareColorsRGBA);
        else
        mColorBuffer.put(squareColorsYMCA);

        mColorBuffer.position(0);

        mIndexBuffer = ByteBuffer.allocateDirect(indices.length);

        mIndexBuffer.put(indices);

        mIndexBuffer.position(0);
    }

    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();
    }

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


***


package cg.bouncysquare;

import android.app.Activity;
import android.opengl.GLSurfaceView;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.WindowManager;

public class BouncySquareActivity extends Activity {

    @Override
    protected 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);
    }
}