Android Open Source - AndroidSettlers Square

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License

The source code is released under:

GNU General Public License

Java Source Code

package com.settlers.hd;
//ww w  . j a  v a  2s  .  c  om
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;
import java.nio.ShortBuffer;

import javax.microedition.khronos.opengles.GL10;

public class Square {

  private static final float[] texture = { 0f, 1f, 0f, 0f, 1f, 1f, 1f, 0f };
  private static final short[] indices = { 0, 1, 2, 3 };

  private FloatBuffer vertexBuffer, textureBuffer, colorBuffer;
  private ShortBuffer indexBuffer;
  private int resource;

  public Square(int resource, float x, float y, float depth, float width, float height) {
    this.resource = resource;
    colorBuffer = null;

    float left = x - width / 2;
    float right = left + width;
    float bottom = y - height / 2;
    float top = bottom + height;

    float vertices[] = { left, bottom, depth, left, top, depth, right, bottom,
        depth, right, top, depth };

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

    ByteBuffer tbb = ByteBuffer.allocateDirect(vertices.length * 4);
    tbb.order(ByteOrder.nativeOrder());
    textureBuffer = tbb.asFloatBuffer();
    textureBuffer.put(texture);
    textureBuffer.position(0);

    ByteBuffer ibb = ByteBuffer.allocateDirect(indices.length * 2);
    ibb.order(ByteOrder.nativeOrder());
    indexBuffer = ibb.asShortBuffer();
    indexBuffer.put(indices);
    indexBuffer.position(0);
  }
  
  public Square(float[] colors, float x, float y, float depth, float width, float height) {
    textureBuffer = null;
    
    float left = x - width / 2;
    float right = left + width;
    float bottom = y - height / 2;
    float top = bottom + height;

    float vertices[] = { left, bottom, depth, left, top, depth, right, bottom,
        depth, right, top, depth };

    ByteBuffer vbb = ByteBuffer.allocateDirect(vertices.length * 4);
    vbb.order(ByteOrder.nativeOrder());
    vertexBuffer = vbb.asFloatBuffer();
    vertexBuffer.put(vertices);
    vertexBuffer.position(0);
    
    ByteBuffer cbb = ByteBuffer.allocateDirect(colors.length * 4);
    cbb.order(ByteOrder.nativeOrder());
    colorBuffer = cbb.asFloatBuffer();
    colorBuffer.put(colors);
    colorBuffer.position(0);

    ByteBuffer ibb = ByteBuffer.allocateDirect(indices.length * 2);
    ibb.order(ByteOrder.nativeOrder());
    indexBuffer = ibb.asShortBuffer();
    indexBuffer.put(indices);
    indexBuffer.position(0);
  }

  public void render(GL10 gl) {    
    gl.glEnable(GL10.GL_CULL_FACE);
    gl.glFrontFace(GL10.GL_CW);
    gl.glCullFace(GL10.GL_BACK);

    gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
    
    if (colorBuffer != null)
      gl.glEnableClientState(GL10.GL_COLOR_ARRAY);

    if (textureBuffer != null)
      gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY);

    gl.glBindTexture(GL10.GL_TEXTURE_2D, resource);

    gl.glVertexPointer(3, GL10.GL_FLOAT, 0, vertexBuffer);
    
    if (colorBuffer != null)
      gl.glColorPointer(4, GL10.GL_FLOAT, 0, colorBuffer);
    
    if (textureBuffer != null)
      gl.glTexCoordPointer(2, GL10.GL_FLOAT, 0, textureBuffer);

    gl.glDrawElements(GL10.GL_TRIANGLE_STRIP, indices.length,
        GL10.GL_UNSIGNED_SHORT, indexBuffer);

    gl.glDisableClientState(GL10.GL_TEXTURE_COORD_ARRAY);
    gl.glDisableClientState(GL10.GL_COLOR_ARRAY);
    gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);
    gl.glDisable(GL10.GL_CULL_FACE);
  }
}

Java Source Code List

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