Android Open Source - HolographicSketch Transformation Mat

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License

The source code is released under:

GNU General Public License

Java Source Code

//$$strtCprt
/**//  w  w w.ja  v  a2s  . c om
* Holographic Sketch -- Stereoscopic 3-D Sketch Program for Android
* 
* Copyright (C) 1993-2012 Thornton Green
* 
* This program 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.
* This program 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 this program; if not, 
* see <http://www.gnu.org/licenses>.
* Additional permission under GNU GPL version 3 section 7
*
* If you modify this Program, or any covered work, by linking or combining it with Android 
* (or a modified version of that library), containing parts covered by the terms of the Android licenses, 
* the licensors of this Program grant you additional permission to convey the resulting work. {Corresponding Source for
* a non-source form of such a combination shall include the source code for the parts of Android used as well 
* as that of the covered work.}
* 
* If you modify this Program, or any covered work, by linking or combining it with HTC OpenSense 
* (or a modified version of that library), containing parts covered by the terms of HTC OpenSense Licenses, 
* the licensors of this Program grant you additional permission to convey the resulting work. {Corresponding Source for
* a non-source form of such a combination shall include the source code for the parts of HTC OpenSense used as well 
* as that of the covered work.}
* 
* If you modify this Program, or any covered work, by linking or combining it with HTC OpenSense Demo Code 
* (or a modified version of that library), containing parts covered by the terms of the Apache License, 
* the licensors of this Program grant you additional permission to convey the resulting work. {Corresponding Source for
* a non-source form of such a combination shall include the source code for the parts of the OpenSense Demo Code as well 
* as that of the covered work.}
* 
*
*/
//$$endCprt





package com.postgreen.stereo;

import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;

import meta.DataFormatException;
import meta.VersionBuffer;

public class TransformationMat implements Externalizable {
  
  /**
  * Version number used to support versioned persistence.
  */
  static final long serialVersionUID = (TransformationMat.class).getName().hashCode() + "v3/98A".hashCode();
  
  protected double[][] mat = new double[ 4 ][ 4 ];
  
  public TransformationMat()
  {
    mat[ 0 ][ 0 ] = 1.0;
    mat[ 1 ][ 1 ] = 1.0;
    mat[ 2 ][ 2 ] = 1.0;
    mat[ 3 ][ 3 ] = 1.0;
  }
  
  public TransformationMat( final double angDegrees , final double x , final double y , final double z )
  {
    final double angRadians = angDegrees * Math.PI / 180.0;
    final double s = Math.sin( angRadians );
    final double c = Math.cos( angRadians );
    
    mat[ 0 ][ 0 ] = x * x * ( 1 - c ) + c;
    mat[ 0 ][ 1 ] = x * y * ( 1 - c ) - z * s;
    mat[ 0 ][ 2 ] = x * z * ( 1 - c ) + y * s;
    
    mat[ 1 ][ 0 ] = y * x * ( 1 - c ) + z * s;
    mat[ 1 ][ 1 ] = y * y * ( 1 - c ) + c;
    mat[ 1 ][ 2 ] = y * z * ( 1 - c ) - x * s;
    
    mat[ 2 ][ 0 ] = x * z * ( 1 - c ) - y * s;
    mat[ 2 ][ 1 ] = y * z * ( 1 - c ) + x * s;
    mat[ 2 ][ 2 ] = z * z * ( 1 - c ) + c;
    
    mat[ 3 ][ 3 ] = 1.0;
    
  }
  
  
  public TransformationMat( final double zTranslate )
  {
    mat[ 0 ][ 0 ] = 1.0;
    mat[ 1 ][ 1 ] = 1.0;
    mat[ 2 ][ 2 ] = 1.0;
    mat[ 3 ][ 3 ] = 1.0;
    mat[ 2 ][ 3 ] = zTranslate;
  }
  
  
  public void multVect( double[] in , double[] out )
  {
    for( int c0 = 0 ; c0 < 3 ; c0++ )
    {
      double sum = 0.0;
      for( int c1 = 0 ; c1 < 3 ; c1++ )
      {
        sum += mat[ c0 ][ c1 ] * in[ c1 ];
      }
      out[ c0 ] = sum;
    }
  }
  
  
  
  
  public void multMat( TransformationMat in , TransformationMat out )
  {
    final double[][] iths = mat;
    final double[][] iin = in.mat;
    final double[][] iout = out.mat;
    
    for( int i = 0 ; i < 4 ; i++ )
    {
      for( int j = 0 ; j < 4 ; j++ )
      {
        double sum = 0.0;
        
        for( int s = 0 ; s < 4 ; s++ )
        {
          sum += iths[ i ][ s ] * iin[ s ][ j ];
        }
        
        iout[ i ][ j ] = sum;
      }
    }
    
  }
  
  
  /*
   * (non-Javadoc)
   * 
   * @see java.io.Externalizable#writeExternal(java.io.ObjectOutput)
   */
  public void writeExternal(ObjectOutput out) throws IOException {
    VersionBuffer myv = new VersionBuffer(VersionBuffer.WRITE);

    myv.setProperty("mat", mat);

    out.writeObject(myv);
  }

  /*
   * (non-Javadoc)
   * 
   * @see java.io.Externalizable#readExternal(java.io.ObjectInput)
   */
  public void readExternal(ObjectInput in) throws IOException,
      ClassNotFoundException {
    try {
      VersionBuffer myv = (VersionBuffer) (in.readObject());
      VersionBuffer.chkNul(myv);

      mat = (double[][])( myv.getPropertyEx("mat") );

    } catch (ClassCastException ex) {
      throw (new DataFormatException(ex));
    }
  }
  

}

Java Source Code List

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