/*
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.EPSILON;
import static org.jwildfire.base.mathlib.MathLib.sqr;
import static org.jwildfire.base.mathlib.MathLib.sqrt;
import org.jwildfire.create.tina.base.XForm;
import org.jwildfire.create.tina.base.XYZPoint;
public class OctagonFunc extends VariationFunc {
private static final long serialVersionUID = 1L;
private static final String PARAM_X = "x";
private static final String PARAM_Y = "y";
private static final String PARAM_Z = "z";
private static final String[] paramNames = { PARAM_X, PARAM_Y, PARAM_Z };
private double x = 0.0;
private double y = 0.0;
private double z = 0.0;
@Override
public void transform(FlameTransformationContext pContext, XForm pXForm, XYZPoint pAffineTP, XYZPoint pVarTP, double pAmount) {
/* octagon from FracFx, http://fracfx.deviantart.com/art/FracFx-Plugin-Pack-171806681 */
double r = pAmount / ((sqr(pAffineTP.x * pAffineTP.x) + sqr(pAffineTP.z) + sqr(pAffineTP.y * pAffineTP.y) + sqr(pAffineTP.z)) + EPSILON);
if (r < 2.0) {
pVarTP.x += pAffineTP.x * r;
pVarTP.y += pAffineTP.y * r;
pVarTP.z += pAffineTP.z * r;
}
else {
pVarTP.x += pAmount * pAffineTP.x;
pVarTP.y += pAmount * pAffineTP.y;
if (pContext.isPreserveZCoordinate()) {
pVarTP.z += pAmount * pAffineTP.z;
}
}
double t = pAmount / ((sqrt(pAffineTP.x * pAffineTP.x) + sqrt(pAffineTP.z) + sqrt(pAffineTP.y * pAffineTP.y) + sqrt(pAffineTP.z)) + EPSILON);
if (r >= 0) {
pVarTP.x += pAffineTP.x * t;
pVarTP.y += pAffineTP.y * t;
pVarTP.z += pAffineTP.z * t;
}
else {
pVarTP.x += pAmount * pAffineTP.x;
pVarTP.y += pAmount * pAffineTP.y;
if (pContext.isPreserveZCoordinate()) {
pVarTP.z += pAmount * pAffineTP.z;
}
}
if (pAffineTP.x >= 0.0)
pVarTP.x += pAmount * (pAffineTP.x + this.x);
else
pVarTP.x += pAmount * (pAffineTP.x - this.x);
if (pAffineTP.y >= 0.0)
pVarTP.y += pAmount * (pAffineTP.y + this.y);
else
pVarTP.y += pAmount * (pAffineTP.y - this.y);
if (pAffineTP.z >= 0.0)
pVarTP.z += pAmount * (pAffineTP.z + this.z);
else
pVarTP.z += pAmount * (pAffineTP.z - this.z);
}
@Override
public String[] getParameterNames() {
return paramNames;
}
@Override
public Object[] getParameterValues() {
return new Object[] { x, y, z };
}
@Override
public void setParameter(String pName, double pValue) {
if (PARAM_X.equalsIgnoreCase(pName))
x = pValue;
else if (PARAM_Y.equalsIgnoreCase(pName))
y = pValue;
else if (PARAM_Z.equalsIgnoreCase(pName))
z = pValue;
else
throw new IllegalArgumentException(pName);
}
@Override
public String getName() {
return "octagon";
}
}