LissajousFunc.java

/*
  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.M_PI;
import static org.jwildfire.base.mathlib.MathLib.sin;

import org.jwildfire.create.tina.base.XForm;
import org.jwildfire.create.tina.base.XYZPoint;

public class LissajousFunc extends VariationFunc {
  private static final long serialVersionUID = 1L;

  private static final String PARAM_TMIN = "tmin";
  private static final String PARAM_TMAX = "tmax";
  private static final String PARAM_A = "a";
  private static final String PARAM_B = "b";
  private static final String PARAM_C = "c";
  private static final String PARAM_D = "d";
  private static final String PARAM_E = "e";

  private static final String[] paramNames = { PARAM_TMIN, PARAM_TMAX, PARAM_A, PARAM_B, PARAM_C, PARAM_D, PARAM_E };

  private double tmin = -M_PI;
  private double tmax = M_PI;
  private double a = 3.0;
  private double b = 2.0;
  private double c = 0.0;
  private double d = 0.0;
  private double e = 0.0;

  @Override
  public void transform(FlameTransformationContext pContext, XForm pXForm, XYZPoint pAffineTP, XYZPoint pVarTP, double pAmount) {
    // Lissajous plugin by Jed Kelsey, http://lu-kout.deviantart.com/art/Apophysis-Plugin-Pack-1-v0-4-59907275
    double t = (tmax - tmin) * pContext.random() + tmin;
    double y = pContext.random() - 0.5;
    double x1 = sin(a * t + d);
    double y1 = sin(b * t);

    pVarTP.x += pAmount * (x1 + c * t + e * y);
    pVarTP.y += pAmount * (y1 + c * t + e * y);

    if (pContext.isPreserveZCoordinate()) {
  pVarTP.z += pAmount * pAffineTP.z;
}

  }

  @Override
  public String[] getParameterNames() {
    return paramNames;
  }

  @Override
  public Object[] getParameterValues() {
    return new Object[] { tmin, tmax, a, b, c, d, e };
  }

  @Override
  public void setParameter(String pName, double pValue) {
    if (PARAM_TMIN.equalsIgnoreCase(pName))
      tmin = pValue;
    else if (PARAM_TMAX.equalsIgnoreCase(pName))
      tmax = pValue;
    else if (PARAM_A.equalsIgnoreCase(pName))
      a = pValue;
    else if (PARAM_B.equalsIgnoreCase(pName))
      b = pValue;
    else if (PARAM_C.equalsIgnoreCase(pName))
      c = pValue;
    else if (PARAM_D.equalsIgnoreCase(pName))
      d = pValue;
    else if (PARAM_E.equalsIgnoreCase(pName))
      e = pValue;
    else
      throw new IllegalArgumentException(pName);
  }

  @Override
  public String getName() {
    return "lissajous";
  }

}