Similar to a splits but accelerates outward, somewhat like pulling at the corners and stretching outward.
Power adjusts the acceleration, default is 0.75, set at 0.5 it behaves like a splits (no acceleration) but can be adjusted higher or lower. If the pattern seems to fade too much, reducing the power or multipliers can help.
Log mode set to 1 changes the algorithm to one that accelerates based on a log calculation rather than the normal x^2 and can get similar but different effects.
/*
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;
import static org.jwildfire.base.mathlib.MathLib.pow;
import static org.jwildfire.base.mathlib.MathLib.log;
public class CornersFunc extends VariationFunc {
private static final long serialVersionUID = 1L;
private static final String PARAM_XWIDTH = x;
private static final String PARAM_YWIDTH = y;
private static final String PARAM_MULTX = mult x;
private static final String PARAM_MULTY = mult y;
private static final String PARAM_POWER = power;
private static final String PARAM_LOGMODE = log mode (0/1);
private static final String PARAM_LOGMULT = log mult;
private static final String[] paramNames = { PARAM_XWIDTH, PARAM_YWIDTH, PARAM_MULTX, PARAM_MULTY, PARAM_POWER, PARAM_LOGMODE, PARAM_LOGMULT };
private double xwidth = 1.0;
private double ywidth = 1.0;
private double multx = 1.0;
private double multy = 1.0;
private double power = 0.75;
private double logmode = 0;
private double logmult = 1;
private double ex = 0;
private double ey = 0;
@Override
public void transform(FlameTransformationContext pContext, XForm pXForm, XYZPoint pAffineTP, XYZPoint pVarTP, double pAmount) {
// corners by Whittaker Courtney 8-8-2018
double x = pAffineTP.x;
double y = pAffineTP.y;
double xs = pAffineTP.x * pAffineTP.x;
double ys = pAffineTP.y * pAffineTP.y;
//log mode
if (logmode == 0){
ex = pow(xs, power) * multx;
ey = pow(ys, power) * multy;
}
else{
ex = pow(log((xs * logmult) +3), multx +2)-1.33;
ey = pow(log((ys * logmult) +3), multy +2)-1.33;
}
if (pAffineTP.x > 0) {
pVarTP.x += pAmount * ex + xwidth;
}
else {
pVarTP.x += pAmount * -ex - xwidth;
}
if (pAffineTP.y > 0) {
pVarTP.y += pAmount * ey + ywidth;
}
else {
pVarTP.y += pAmount * -ey - ywidth;
}
if (pContext.isPreserveZCoordinate()) {
pVarTP.z += pAmount * pAffineTP.z;
}
}
@Override
public String[] getParameterNames() {
return paramNames;
}
@Override
public Object[] getParameterValues() {
return new Object[] { xwidth, ywidth, multx, multy, power, logmode, logmult };
}
@Override
public void setParameter(String pName, double pValue) {
if (PARAM_XWIDTH.equalsIgnoreCase(pName))
xwidth = pValue;
else if (PARAM_YWIDTH.equalsIgnoreCase(pName))
ywidth = pValue;
else if (PARAM_MULTX.equalsIgnoreCase(pName))
multx = pValue;
else if (PARAM_MULTY.equalsIgnoreCase(pName))
multy = pValue;
else if (PARAM_POWER.equalsIgnoreCase(pName))
power = pValue;
else if (PARAM_LOGMODE.equalsIgnoreCase(pName))
logmode = pValue;
else if (PARAM_LOGMULT.equalsIgnoreCase(pName))
logmult = pValue;
else
throw new IllegalArgumentException(pName);
}
@Override
public String getName() {
return corners;
}
}
zip
