/*
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.M_PI;
import static org.jwildfire.base.mathlib.MathLib.cos;
import static org.jwildfire.base.mathlib.MathLib.exp;
import static org.jwildfire.base.mathlib.MathLib.fabs;
import org.jwildfire.create.tina.base.Layer;
import org.jwildfire.create.tina.base.XForm;
import org.jwildfire.create.tina.base.XYZPoint;
public class OscilloscopeFunc extends VariationFunc {
private static final long serialVersionUID = 1L;
private static final String PARAM_SEPARATION = "separation";
private static final String PARAM_FREQUENCY = "frequency";
private static final String PARAM_AMPLITUDE = "amplitude";
private static final String PARAM_DAMPING = "damping";
private static final String[] paramNames = { PARAM_SEPARATION, PARAM_FREQUENCY, PARAM_AMPLITUDE, PARAM_DAMPING };
private double separation = 1.00;
private double frequency = M_PI;
private double amplitude = 1.0;
private double damping = 0.0;
@Override
public void transform(FlameTransformationContext pContext, XForm pXForm, XYZPoint pAffineTP, XYZPoint pVarTP, double pAmount) {
/* oscilloscope from the apophysis plugin pack */
double t;
if (_noDamping) {
t = amplitude * cos(_tpf * pAffineTP.x) + separation;
}
else {
t = amplitude * exp(-fabs(pAffineTP.x) * damping) * cos(_tpf * pAffineTP.x) + separation;
}
if (fabs(pAffineTP.y) <= t) {
pVarTP.x += pAmount * pAffineTP.x;
pVarTP.y -= pAmount * pAffineTP.y;
}
else {
pVarTP.x += pAmount * pAffineTP.x;
pVarTP.y += pAmount * pAffineTP.y;
}
if (pContext.isPreserveZCoordinate()) {
pVarTP.z += pAmount * pAffineTP.z;
}
}
@Override
public String[] getParameterNames() {
return paramNames;
}
@Override
public Object[] getParameterValues() {
return new Object[] { separation, frequency, amplitude, damping };
}
@Override
public void setParameter(String pName, double pValue) {
if (PARAM_SEPARATION.equalsIgnoreCase(pName))
separation = pValue;
else if (PARAM_FREQUENCY.equalsIgnoreCase(pName))
frequency = pValue;
else if (PARAM_AMPLITUDE.equalsIgnoreCase(pName))
amplitude = pValue;
else if (PARAM_DAMPING.equalsIgnoreCase(pName))
damping = pValue;
else
throw new IllegalArgumentException(pName);
}
@Override
public String getName() {
return "oscilloscope";
}
private double _tpf;
private boolean _noDamping;
@Override
public void init(FlameTransformationContext pContext, Layer pLayer, XForm pXForm, double pAmount) {
_tpf = 2.0f * M_PI * frequency;
_noDamping = fabs(damping) <= EPSILON;
}
}