SplitBrdrFunc.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.fabs;
import static org.jwildfire.base.mathlib.MathLib.rint;
import static org.jwildfire.base.mathlib.MathLib.sqr;

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

public class SplitBrdrFunc 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_PX = "px";
  private static final String PARAM_PY = "py";
  private static final String[] paramNames = { PARAM_X, PARAM_Y, PARAM_PX, PARAM_PY };

  private double x = 0.25;
  private double y = 0.25;
  private double px = 0.0;
  private double py = 0.0;

  @Override
  public void transform(FlameTransformationContext pContext, XForm pXForm, XYZPoint pAffineTP, XYZPoint pVarTP, double pAmount) {
    /* splitbrdr from FracFx, http://fracfx.deviantart.com/art/FracFx-Plugin-Pack-171806681 */
    double B, b;
    B = (sqr(pAffineTP.x) + sqr(pAffineTP.y)) / 4 + 1; //make a bubble ;p
    b = pAmount / B;
    pVarTP.x += pAffineTP.x * b;
    pVarTP.y += pAffineTP.y * b;

    double roundX, roundY, offsetX, offsetY;
    //add a border 0.25 default adjustable wih this.x and this.y

    roundX = rint(pAffineTP.x);
    roundY = rint(pAffineTP.y);
    offsetX = pAffineTP.x - roundX;
    offsetY = pAffineTP.y - roundY;

    if (Math.random() >= 0.75)
    {
      pVarTP.x += pAmount * (offsetX * 0.5 + roundX);
      pVarTP.y += pAmount * (offsetY * 0.5 + roundY);
    }
    else
    {
      if (fabs(offsetX) >= fabs(offsetY))
      {
        if (offsetX >= 0.0)
        {
          pVarTP.x += pAmount * (offsetX * 0.5 + roundX + this.x);
          pVarTP.y += pAmount * (offsetY * 0.5 + roundY + this.y * offsetY / offsetX);
        }
        else
        {
          pVarTP.x += pAmount * (offsetX * 0.5 + roundX - this.y);
          pVarTP.y += pAmount * (offsetY * 0.5 + roundY - this.y * offsetY / offsetX);
        }
      }
      else
      {
        if (offsetY >= 0.0)
        {
          pVarTP.y += pAmount * (offsetY * 0.5 + roundY + this.y);
          pVarTP.x += pAmount * (offsetX * 0.5 + roundX + offsetX / offsetY * this.y);
        }
        else
        {
          pVarTP.y += pAmount * (offsetY * 0.5 + roundY - this.y);
          pVarTP.x += pAmount * (offsetX * 0.5 + roundX - offsetX / offsetY * this.x);
        }
      }
    }
    pVarTP.x += pAffineTP.x * this.px;
    pVarTP.y += pAffineTP.y * this.py;
    if (pContext.isPreserveZCoordinate()) {
  pVarTP.z += pAmount * pAffineTP.z;
}
  }

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

  @Override
  public Object[] getParameterValues() {
    return new Object[] { x, y, px, py };
  }

  @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_PX.equalsIgnoreCase(pName))
      px = pValue;
    else if (PARAM_PY.equalsIgnoreCase(pName))
      py = pValue;
    else
      throw new IllegalArgumentException(pName);
  }

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

}