/*
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.atan2;
import static org.jwildfire.base.mathlib.MathLib.cos;
import static org.jwildfire.base.mathlib.MathLib.sin;
import static org.jwildfire.base.mathlib.MathLib.sqrt;
import org.jwildfire.create.tina.base.XForm;
import org.jwildfire.create.tina.base.XYZPoint;
public class LazySusanFunc extends VariationFunc {
private static final long serialVersionUID = 1L;
private static final String PARAM_SPACE = "space";
private static final String PARAM_TWIST = "twist";
private static final String PARAM_SPIN = "spin";
private static final String PARAM_X = "x";
private static final String PARAM_Y = "y";
private static final String[] paramNames = { PARAM_SPACE, PARAM_TWIST, PARAM_SPIN, PARAM_X, PARAM_Y };
private double space = 0.40;
private double twist = 0.20;
private double spin = 0.10;
private double x = 0.10;
private double y = 0.20;
@Override
public void transform(FlameTransformationContext pContext, XForm pXForm, XYZPoint pAffineTP, XYZPoint pVarTP, double pAmount) {
/* Lazysusan in the Apophysis Plugin Pack */
double xx = pAffineTP.x - x;
double yy = pAffineTP.y + y;
double rr = sqrt(xx * xx + yy * yy);
if (rr < pAmount) {
double a = atan2(yy, xx) + spin + twist * (pAmount - rr);
double sina = sin(a);
double cosa = cos(a);
rr = pAmount * rr;
pVarTP.x += rr * cosa + x;
pVarTP.y += rr * sina - y;
}
else {
rr = pAmount * (1.0 + space / rr);
pVarTP.x += rr * xx + x;
pVarTP.y += rr * yy - y;
}
if (pContext.isPreserveZCoordinate()) {
pVarTP.z += pAmount * pAffineTP.z;
}
}
@Override
public String[] getParameterNames() {
return paramNames;
}
@Override
public Object[] getParameterValues() {
return new Object[] { space, twist, spin, x, y };
}
@Override
public void setParameter(String pName, double pValue) {
if (PARAM_SPACE.equalsIgnoreCase(pName))
space = pValue;
else if (PARAM_TWIST.equalsIgnoreCase(pName))
twist = pValue;
else if (PARAM_SPIN.equalsIgnoreCase(pName))
spin = pValue;
else if (PARAM_X.equalsIgnoreCase(pName))
x = pValue;
else if (PARAM_Y.equalsIgnoreCase(pName))
y = pValue;
else
throw new IllegalArgumentException(pName);
}
@Override
public String getName() {
return "lazysusan";
}
}