/*
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.cos;
import static org.jwildfire.base.mathlib.MathLib.sin;
import org.jwildfire.create.tina.base.XForm;
import org.jwildfire.create.tina.base.XYZPoint;
public class WhorlFunc extends VariationFunc {
private static final long serialVersionUID = 1L;
private static final String PARAM_INSIDE = "inside";
private static final String PARAM_OUTSIDE = "outside";
private static final String[] paramNames = { PARAM_INSIDE, PARAM_OUTSIDE };
private double inside = 0.10;
private double outside = 0.20;
@Override
public void transform(FlameTransformationContext pContext, XForm pXForm, XYZPoint pAffineTP, XYZPoint pVarTP, double pAmount) {
/* whorl from apo plugins pack */
double r = pAffineTP.getPrecalcSqrt();
double a;
if (r < pAmount)
a = pAffineTP.getPrecalcAtanYX() + inside / (pAmount - r);
else
a = pAffineTP.getPrecalcAtanYX() + outside / (pAmount - r);
double sa = sin(a);
double ca = cos(a);
pVarTP.x += pAmount * r * ca;
pVarTP.y += pAmount * r * sa;
if (pContext.isPreserveZCoordinate()) {
pVarTP.z += pAmount * pAffineTP.z;
}
}
@Override
public String[] getParameterNames() {
return paramNames;
}
@Override
public Object[] getParameterValues() {
return new Object[] { inside, outside };
}
@Override
public void setParameter(String pName, double pValue) {
if (PARAM_INSIDE.equalsIgnoreCase(pName))
inside = pValue;
else if (PARAM_OUTSIDE.equalsIgnoreCase(pName))
outside = pValue;
else
throw new IllegalArgumentException(pName);
}
@Override
public String getName() {
return "whorl";
}
}