RingTile2Func.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 org.jwildfire.create.tina.base.XForm;
import org.jwildfire.create.tina.base.XYZPoint;

import org.jwildfire.base.mathlib.Complex;
import static org.jwildfire.base.mathlib.MathLib.*;

public class RingTile2Func extends VariationFunc  {
  private static final long serialVersionUID = 1L;

  private static final String PARAM_POWER = "power";
  private static final String PARAM_TILESIZE = "tilesize";
  private static final String PARAM_WIDTH1 = "width1";
  private static final String PARAM_WIDTH2 = "width2";
  private static final String PARAM_OUTLINE = "outline";
  private static final String PARAM_RING = "ring";


  private static final String[] paramNames = {PARAM_POWER, PARAM_TILESIZE, PARAM_WIDTH1, PARAM_WIDTH2, PARAM_OUTLINE, PARAM_RING};


  private double power = 5.0;
  private double tilesize = 0.50;
  private double width1 = 0.50;
  private double width2 = 0.30;
  private double outline = 0.000001;
  private int ring = 1;


  @Override
  public void transform(FlameTransformationContext pContext, XForm pXForm, XYZPoint pAffineTP, XYZPoint pVarTP, double pAmount) {
    /* ringtile by Brad Stefanov and Whittaker Courtney   */
     double _yr1 = outline * width2;
     double yh = -power;
     double xr, yr;
      if (pContext.random() < 0.5)
        yh = power;
      yr = tilesize * (pAffineTP.y + Math.round(yh * log(pContext.random())));
      if (pAffineTP.x > width2) {
        xr = width1 * (-width2 + fmod(pAffineTP.x + width2, _yr1));
      }
       else if (pAffineTP.x < -width2) {
        xr = width1 * (width2 - fmod(width2 - pAffineTP.x, _yr1));
      }
       else {
        xr = width1 * pAffineTP.x;
      }

        Complex z = new Complex(xr, yr);
        if (ring != 0)
          z.Exp();
        pVarTP.x += pAmount * z.re;
        pVarTP.y += pAmount * z.im;

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

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

  @Override
  public Object[] getParameterValues() {
    return new Object[]{power, tilesize, width1, width2, outline, ring};
  }

  @Override
  public void setParameter(String pName, double pValue) {
    if (PARAM_POWER.equalsIgnoreCase(pName))
      power = pValue;
    else if (PARAM_TILESIZE.equalsIgnoreCase(pName))
      tilesize = pValue;
    else if (PARAM_WIDTH1.equalsIgnoreCase(pName))
      width1 = pValue;
    else if (PARAM_WIDTH2.equalsIgnoreCase(pName))
      width2 = pValue;
    else if (PARAM_OUTLINE.equalsIgnoreCase(pName))
      outline = pValue;
    else if (PARAM_RING .equalsIgnoreCase(pName))
      ring = (int) limitVal(pValue, 0, 1);
    else
      throw new IllegalArgumentException(pName);
  }

  @Override
  public String getName() {
    return "ringtile2";
  }

}