Android Open Source - ScalAR A R Object

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License

The source code is released under:

GNU General Public License

Java Source Code

/**
  Copyright (C) 2009,2010  Tobias Domhan
//from   w  ww.  j  a va  2s  .co m
    This file is part of AndOpenGLCam.

    AndObjViewer is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    AndObjViewer is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with AndObjViewer.  If not, see <http://www.gnu.org/licenses/>.
 
 */
package edu.dhbw.andar;

import java.nio.FloatBuffer;

import javax.microedition.khronos.opengles.GL10;

import edu.dhbw.andar.util.GraphicsUtil;

/**
 * 
 * @author tobi
 *
 */
public abstract class ARObject {
  /**
   * Is this object visible? -> is the marker belonging to this object visible?
   */
  private boolean visible = false;
  private String name;
  private String patternName;
  private double markerWidth;
  private double[] center;
  //this object must be locked while altering the glMatrix
  private float[] glMatrix = new float[16];
  protected static float[] glCameraMatrix = new float[16];
  private FloatBuffer glMatrixBuffer;
  protected static FloatBuffer glCameraMatrixBuffer;
  
  //this object must be locked while altering the transMat
  private double[] transMat = new double[16];//[3][4] array
  private int id;
  private boolean initialized = false;
  
  /**
   * Create a new AR object.
   * @param name the name of the the object, an arbitrary string
   * @param patternName the file name of the pattern(the file must reside in the res/raw folder)
   * @param markerWidth
   * @param markerCenter
   */
  public ARObject(String name, String patternName, double markerWidth, double[] markerCenter) {
    this.name = name;
    this.patternName = patternName;
    this.markerWidth = markerWidth;
    if(markerCenter.length == 2) {
      this.center = markerCenter;
    } else {
      this.center = new double[]{0,0};
    }
    glMatrixBuffer = GraphicsUtil.makeFloatBuffer(glMatrix);    
  }
  
  
  
  
  public double getMarkerWidth() {
    return markerWidth;
  }




  public double[] getCenter() {
    return center;
  }




  public int getId() {
    return id;
  }




  protected void setId(int id) {
    this.id = id;
  }

  



  public String getPatternName() {
    return patternName;
  }


  /**
   * 
   * @return Is this object visible? -> is the marker belonging to this object visible?
   */
  public boolean isVisible() {
    return visible;
  }


  /**
   * Get the current translation matrix.
   * @return
   */
  public synchronized double[] getTransMatrix() {
    return transMat;
  }
  
  /**
   * Do OpenGL stuff.
   * Everything draw here will be drawn directly onto the marker.
   * TODO replace wrap by real floatbuffer
   * @param gl
   */
  public synchronized void draw(GL10 gl) {
    if(!initialized) {
      init(gl);
      initialized = true;
    }
    if(glCameraMatrixBuffer != null) {
      glMatrixBuffer.put(glMatrix);
      glMatrixBuffer.position(0);
      
      //argDrawMode3D
      gl.glMatrixMode(GL10.GL_MODELVIEW);
        gl.glLoadIdentity();
        //argDraw3dCamera
        gl.glMatrixMode(GL10.GL_PROJECTION);
        gl.glLoadMatrixf( glCameraMatrixBuffer );
        
        gl.glMatrixMode(GL10.GL_MODELVIEW);
      gl.glLoadMatrixf(glMatrixBuffer);
    }
  }
  
  public abstract void init(GL10 gl); 
  
}

Java Source Code List

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