/*
  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.cos;

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

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

  private static final String PARAM_XSIZE = "xsize";
  private static final String PARAM_YSIZE = "ysize";

  private static final String[] paramNames = { PARAM_XSIZE, PARAM_YSIZE };

  private double xSize = 0.40;
  private double ySize = 0.60;

  @Override
  public void transform(FlameTransformationContext pContext, XForm pXForm, XYZPoint pAffineTP, XYZPoint pVarTP, double pAmount) {
    /* Split from apo plugins pack */
    if (cos(pAffineTP.x * xSize * M_PI) >= 0) {
      pVarTP.y += pAmount * pAffineTP.y;
    }
    else {
      pVarTP.y -= pAmount * pAffineTP.y;
    }

    if (cos(pAffineTP.y * ySize * M_PI) >= 0) {
      pVarTP.x += pAmount * pAffineTP.x;
    }
    else {
      pVarTP.x -= pAmount * pAffineTP.x;
    }
    if (pContext.isPreserveZCoordinate()) {
  pVarTP.z += pAmount * pAffineTP.z;
}
  }

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

  @Override
  public Object[] getParameterValues() {
    return new Object[] { xSize, ySize };
  }

  @Override
  public void setParameter(String pName, double pValue) {
    if (PARAM_XSIZE.equalsIgnoreCase(pName))
      xSize = pValue;
    else if (PARAM_YSIZE.equalsIgnoreCase(pName))
      ySize = pValue;
    else
      throw new IllegalArgumentException(pName);
  }

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

}