Android Open Source - splott Camera

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License

The source code is released under:

MIT License

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Java Source Code

package com.wordsaretoys.rise.geometry;
//w  w  w .  j  av a  2s  .c o  m
import android.opengl.GLES20;

/**
 * maintain a camera: a special case of mote
 * that implements a projection matrix
 * 
 * @author chris
 *
 */
public class Camera extends Mote {

  public float viewFactor;
  public float[] projector;
  
  /**
   * constructor
   */
  public Camera(float viewAngle, float nearLimit, float farLimit) {
    viewFactor = 1f / (float) Math.tan(viewAngle * Math.PI / 180f);
    // set fixed matrix elements
    projector = new float[16];
    float d = (float)(nearLimit - farLimit);
    projector[0] = (float)viewFactor;
    projector[5] = (float)viewFactor;
    projector[10] = (float) ((farLimit + nearLimit) / d);
    projector[11] = -1;
    projector[14] = (float)(2 * nearLimit * farLimit / d);
  }
  
  /**
   * set camera aspect ratio and viewport
   * @param width, height dimensions of viewport
   */
  public void size(int width, int height) {
    float aspectRatio = (float)width / (float)height;
    projector[0] = (float)viewFactor / aspectRatio;
    GLES20.glViewport(0, 0, width, height);
  }
  
}

Java Source Code List