Android Open Source - block-composer Axis Renderer

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Back to project page block-composer.

License

The source code is released under:

MIT License

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Java Source Code

package bwr.blockcomposer.models;
/* ww  w .  j a va  2  s.co  m*/
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.CharBuffer;
import java.nio.IntBuffer;

import javax.microedition.khronos.opengles.GL10;

public class AxisRenderer {
  private final static int FLOAT_SIZE = 4;
  private final static int CHAR_SIZE = 2;
  private final static int AXIS_LENGTH = 20<<16;
  
  private int numVertices;
  
  private IntBuffer vertexBuffer;
  private CharBuffer indexBuffer;
  
  public void render(GL10 gl) {
    gl.glDisable(GL10.GL_LIGHTING);
    gl.glDisable(GL10.GL_TEXTURE_2D);

    gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);    
    gl.glVertexPointer(3, GL10.GL_FIXED, 0, vertexBuffer);
    
    gl.glLineWidthx(1<<16);
    gl.glColor4x(1<<16, 1<<16, 1<<16, 1<<16);

    gl.glDrawElements(GL10.GL_LINES, numVertices, GL10.GL_UNSIGNED_SHORT, indexBuffer);
    
    gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);
    gl.glEnable(GL10.GL_LIGHTING);
    gl.glEnable(GL10.GL_TEXTURE_2D);
  }
  
  private void putVertex(int x, int y, int z) {
    vertexBuffer.put(x);
    vertexBuffer.put(y);
    vertexBuffer.put(z);
  }
  
  public AxisRenderer() {
    
    numVertices = 6;
            
    vertexBuffer = ByteBuffer.allocateDirect(numVertices*3*FLOAT_SIZE).order(ByteOrder.nativeOrder()).asIntBuffer();
    indexBuffer = ByteBuffer.allocateDirect(numVertices*CHAR_SIZE).order(ByteOrder.nativeOrder()).asCharBuffer();
    
        char index = 0; // vertex index
  
    putVertex(0, -AXIS_LENGTH, 0); indexBuffer.put(index++);
    putVertex(0,  AXIS_LENGTH, 0); indexBuffer.put(index++);

    putVertex(-AXIS_LENGTH, 0, 0); indexBuffer.put(index++);
    putVertex( AXIS_LENGTH, 0, 0); indexBuffer.put(index++);

    putVertex(0, 0, -AXIS_LENGTH); indexBuffer.put(index++);
    putVertex(0, 0,  AXIS_LENGTH); indexBuffer.put(index++);      
    
    vertexBuffer.position(0);
    indexBuffer.position(0);
  }
}

Java Source Code List