/*
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.fabs;
import static org.jwildfire.base.mathlib.MathLib.fmod;
import static org.jwildfire.base.mathlib.MathLib.sqr;
import org.jwildfire.create.tina.base.Layer;
import org.jwildfire.create.tina.base.XForm;
import org.jwildfire.create.tina.base.XYZPoint;
public class DCBubbleFunc extends VariationFunc {
private static final long serialVersionUID = 1L;
private static final String PARAM_CENTERX = "centerx";
private static final String PARAM_CENTERY = "centery";
private static final String PARAM_SCALE = "scale";
private static final String[] paramNames = { PARAM_CENTERX, PARAM_CENTERY, PARAM_SCALE };
private double centerx = 0.0;
private double centery = 0.0;
private double scale = 1.0;
@Override
public void transform(FlameTransformationContext pContext, XForm pXForm, XYZPoint pAffineTP, XYZPoint pVarTP, double pAmount) {
/* dc_bubble by Xyrus02, http://apophysis-7x.org/extensions */
double r = (sqr(pAffineTP.x) + sqr(pAffineTP.y));
double r4_1 = r / 4.0 + 1.0;
r4_1 = pAmount / r4_1;
pVarTP.x += pVarTP.x + r4_1 * pAffineTP.x;
pVarTP.y += pVarTP.y + r4_1 * pAffineTP.y;
pVarTP.z += pVarTP.z + pAmount * (2.0 / r4_1 - 1.0);
pVarTP.color = fmod(fabs(bdcs * (sqr(pVarTP.x + centerx) + sqr(pVarTP.y + centery))), 1.0);
}
@Override
public String[] getParameterNames() {
return paramNames;
}
@Override
public Object[] getParameterValues() {
return new Object[] { centerx, centery, scale };
}
@Override
public void setParameter(String pName, double pValue) {
if (PARAM_CENTERX.equalsIgnoreCase(pName))
centerx = pValue;
else if (PARAM_CENTERY.equalsIgnoreCase(pName))
centery = pValue;
else if (PARAM_SCALE.equalsIgnoreCase(pName))
scale = pValue;
else
throw new IllegalArgumentException(pName);
}
@Override
public String getName() {
return "dc_bubble";
}
private double bdcs;
@Override
public void init(FlameTransformationContext pContext, Layer pLayer, XForm pXForm, double pAmount) {
bdcs = 1.0 / (scale == 0.0 ? 10E-6 : scale);
}
}