Android Open Source - android_opengles Cube

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License

The source code is released under:

MIT License

Java Source Code

package com.example.opengles;
/* w  ww.j av  a 2 s . c o m*/
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;

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

public class Cube {

  private FloatBuffer mFVertexBuffer;
  private ByteBuffer mColorBuffer;
  private ByteBuffer mTfan1, mTfan2;

  public Cube() {
    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,
    };
    byte maxColor = (byte) 255;
    byte colors[] = {
        maxColor, maxColor, 0, maxColor,
        0, maxColor, maxColor, maxColor,
        0, 0, 0, maxColor,
        maxColor, 0, maxColor, maxColor,

        maxColor, 0, 0, maxColor,
        0, maxColor, 0, maxColor,
        0, 0, maxColor, maxColor,
        0, 0, 0, maxColor,
    };
    byte tfan1[] = {
        1, 0, 3,
        1, 3, 2,
        1, 2, 6,
        1, 6, 5,
        1, 5, 4,
        1, 4, 0,
    };
    byte tfan2[] = {
        7, 4, 5,
        7, 5, 6,
        7, 6, 2,
        7, 2, 3,
        7, 3, 0,
        7, 0, 4,
    };
    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);

    mTfan1 = ByteBuffer.allocateDirect(tfan1.length);
    mTfan1.put(tfan1);
    mTfan1.position(0);

    mTfan2 = ByteBuffer.allocateDirect(tfan2.length);
    mTfan2.put(tfan2);
    mTfan2.position(0);
  }

  public void draw(GL10 gl) {
    gl.glVertexPointer(3, GL11.GL_FLOAT, 0, mFVertexBuffer);
    gl.glColorPointer(4, GL11.GL_UNSIGNED_BYTE, 0, mColorBuffer);

    gl.glDrawElements(GL11.GL_TRIANGLE_FAN, 6 * 3, GL11.GL_UNSIGNED_BYTE, mTfan1);
    gl.glDrawElements(GL11.GL_TRIANGLE_FAN, 6 * 3, GL11.GL_UNSIGNED_BYTE, mTfan2);
  }

}

Java Source Code List

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