/*
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 org.jwildfire.create.tina.base.XForm;
import org.jwildfire.create.tina.base.XYZPoint;
public class ConicFunc extends VariationFunc {
private static final long serialVersionUID = 1L;
private static final String PARAM_ECCENTRICITY = "eccentricity";
private static final String PARAM_HOLES = "holes";
private static final String[] paramNames = { PARAM_ECCENTRICITY, PARAM_HOLES };
private double eccentricity = 1.0;
private double holes = 0.0;
@Override
public void transform(FlameTransformationContext pContext, XForm pXForm, XYZPoint pAffineTP, XYZPoint pVarTP, double pAmount) {
/* cyberxaos, 4/2007 */
double ct = pAffineTP.x / pAffineTP.getPrecalcSqrt();
double r = pAmount * (pContext.random() - holes) * eccentricity / (1 + eccentricity * ct) / pAffineTP.getPrecalcSqrt();
pVarTP.x += r * pAffineTP.x;
pVarTP.y += r * pAffineTP.y;
if (pContext.isPreserveZCoordinate()) {
pVarTP.z += pAmount * pAffineTP.z;
}
}
@Override
public String[] getParameterNames() {
return paramNames;
}
@Override
public Object[] getParameterValues() {
return new Object[] { eccentricity, holes };
}
@Override
public void setParameter(String pName, double pValue) {
if (PARAM_ECCENTRICITY.equalsIgnoreCase(pName))
eccentricity = pValue;
else if (PARAM_HOLES.equalsIgnoreCase(pName))
holes = pValue;
else
throw new IllegalArgumentException(pName);
}
@Override
public String getName() {
return "conic";
}
}