Waves2Func.java

/*
  JWildfire - an image and animation processor written in Java 
  Copyright (C) 1995-2011 Andreas Maschke

  This is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser 
  General Public License as published by the Free Software Foundation; either version 2.1 of the 
  License, or (at your option) any later version.
 
  This software 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 
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License along with this software; 
  if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jwildfire.create.tina.variation;

import static org.jwildfire.base.mathlib.MathLib.M_PI;
import static org.jwildfire.base.mathlib.MathLib.sin;

import org.jwildfire.create.tina.base.XForm;
import org.jwildfire.create.tina.base.XYZPoint;

public class Waves2Func extends VariationFunc {
  private static final long serialVersionUID = 1L;

  private static final String PARAM_SCALEX = "scalex";
  private static final String PARAM_SCALEY = "scaley";
  private static final String PARAM_FREQX = "freqx";
  private static final String PARAM_FREQY = "freqy";
  private static final String[] paramNames = { PARAM_SCALEX, PARAM_SCALEY, PARAM_FREQX, PARAM_FREQY };

  private double scalex = 0.25;
  private double scaley = 0.5;
  private double freqx = M_PI / 2;
  private double freqy = M_PI / 4;

  @Override
  public void transform(FlameTransformationContext pContext, XForm pXForm, XYZPoint pAffineTP, XYZPoint pVarTP, double pAmount) {
    /* waves2 from Joel F */
    pVarTP.x += pAmount * (pAffineTP.x + scalex * sin(pAffineTP.y * freqx));
    pVarTP.y += pAmount * (pAffineTP.y + scaley * sin(pAffineTP.x * freqy));
    if (pContext.isPreserveZCoordinate()) {
  pVarTP.z += pAmount * pAffineTP.z;
}
  }

  @Override
  public String[] getParameterNames() {
    return paramNames;
  }

  @Override
  public Object[] getParameterValues() {
    return new Object[] { scalex, scaley, freqx, freqy };
  }

  @Override
  public void setParameter(String pName, double pValue) {
    if (PARAM_SCALEX.equalsIgnoreCase(pName))
      scalex = pValue;
    else if (PARAM_SCALEY.equalsIgnoreCase(pName))
      scaley = pValue;
    else if (PARAM_FREQX.equalsIgnoreCase(pName))
      freqx = pValue;
    else if (PARAM_FREQY.equalsIgnoreCase(pName))
      freqy = pValue;
    else
      throw new IllegalArgumentException(pName);
  }

  @Override
  public String getName() {
    return "waves2";
  }

}