EGIOC/Square.java at master · Dany9966/EGIOC · GitHub

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package cg.bouncysquare;

import javax.microedition.khronos.opengles.GL10;
import javax.microedition.khronos.opengles.GL11;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;
import android.content.Context;
import android.graphics.*;
import android.opengl.*;

public class Square {
    private FloatBuffer mFVertexBuffer;
    private FloatBuffer mColorBuffer;
    private FloatBuffer mTextureCoords0;
    private FloatBuffer mTextureCoords1;
    private ByteBuffer  mIndexBuffer;


    private int mTexture0;
    private int mTexture1;


    public Square(float colors[])
    {
        float vertices[] =
                {
                        -1.0f, -1.0f,
                        1.0f, -1.0f,
                        -1.0f,  1.0f,
                        1.0f,  1.0f
                };

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


        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);

        vbb = ByteBuffer.allocateDirect(colors.length * 4);
        vbb.order(ByteOrder.nativeOrder());
        mColorBuffer = vbb.asFloatBuffer();
        mColorBuffer.put(colors);
        mColorBuffer.position(0);

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

        vbb = ByteBuffer.allocateDirect(textureCoords.length * 4);
        vbb.order(ByteOrder.nativeOrder());
        mTextureCoords0 = vbb.asFloatBuffer();
        mTextureCoords0.put(textureCoords);
        mTextureCoords0.position(0);

        vbb = ByteBuffer.allocateDirect(textureCoords.length * 4);
        vbb.order(ByteOrder.nativeOrder());
        mTextureCoords1 = vbb.asFloatBuffer();
        mTextureCoords1.put(textureCoords);
        mTextureCoords1.position(0);


    }

    public void draw(GL10 gl)
    {
        gl.glEnable(GL10.GL_TEXTURE_2D);
        gl.glBindTexture(GL10.GL_TEXTURE_2D,mTexture0);
        gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY);

        gl.glFrontFace(GL11.GL_CW);
        gl.glVertexPointer(2, GL11.GL_FLOAT, 0, mFVertexBuffer);
        gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
        gl.glColorPointer(4, GL11.GL_FLOAT, 0, mColorBuffer);
        gl.glEnableClientState(GL10.GL_COLOR_ARRAY);

        gl.glClientActiveTexture(GL10.GL_TEXTURE0);
        gl.glTexCoordPointer(2, GL10.GL_FLOAT,0,mTextureCoords0);

        gl.glClientActiveTexture(GL10.GL_TEXTURE1);
        gl.glTexCoordPointer(2, GL10.GL_FLOAT,0,mTextureCoords1);

        multiTexture(gl,mTexture0,mTexture1);

        gl.glDrawElements(GL11.GL_TRIANGLES, 6, GL11.GL_UNSIGNED_BYTE, mIndexBuffer);
        gl.glFrontFace(GL11.GL_CCW);
    }

    public void setTextures(GL10 gl,Context context,int resourceID0, int resourceID1)
    {
        mTexture0=createTexture(gl,context,resourceID0);
        mTexture1=createTexture(gl,context,resourceID1);
    }

    public int createTexture(GL10 gl, Context contextRegf, int resource)
    {
        int[] textures = new int[1];

        Bitmap tempImage = BitmapFactory.decodeResource(contextRegf.getResources(), resource); // 1

        gl.glGenTextures(1, textures, 0);                   // 2
        gl.glBindTexture(GL10.GL_TEXTURE_2D, textures[0]);  // 3

        GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, tempImage, 0); // 4

        gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_LINEAR); // 5a
        gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MAG_FILTER, GL10.GL_LINEAR); // 5b

        tempImage.recycle();//6

        return textures[0];
    }

    public void multiTexture(GL10 gl, int tex0, int tex1)
    {
        float combineParameter= GL10.GL_DECAL;          //1

        // Set up the First Texture.
        gl.glActiveTexture(GL10.GL_TEXTURE0);                   //2
        gl.glBindTexture(GL10.GL_TEXTURE_2D, tex0);             //3

        // Set up the Second Texture.
        gl.glActiveTexture(GL10.GL_TEXTURE1);
        gl.glBindTexture(GL10.GL_TEXTURE_2D, tex1);

        // Set the texture environment mode for this texture to combine.
        gl.glTexEnvf(GL10.GL_TEXTURE_ENV, GL10.GL_TEXTURE_ENV_MODE, combineParameter);  //4
    }

}