PostRBlurFunc.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.sqr;
import static org.jwildfire.base.mathlib.MathLib.sqrt;

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

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

  private static final String PARAM_STRENGTH = "strength";
  private static final String PARAM_OFFSET = "offset";
  private static final String PARAM_CENTER_X = "center_x";
  private static final String PARAM_CENTER_Y = "center_y";
  private static final String[] paramNames = { PARAM_STRENGTH, PARAM_OFFSET, PARAM_CENTER_X, PARAM_CENTER_Y };

  private double strength = 1.0;
  private double offset = 1.0;
  private double center_x = 0.0;
  private double center_y = 1.0;

  @Override
  public void transform(FlameTransformationContext pContext, XForm pXForm, XYZPoint pAffineTP, XYZPoint pVarTP, double pAmount) {
    // post_rblur by Xyrus02, http://xyrus-02.deviantart.com/art/post-rblur-Plugin-for-Apo-171185576
    double r = sqrt(sqr(pVarTP.x - center_x) + sqr(pVarTP.y - center_y)) - offset;
    r = r < 0 ? 0 : r;
    r *= s2;
    pVarTP.x = pAmount * (pVarTP.x + (pContext.random() - 0.5) * r);
    pVarTP.y = pAmount * (pVarTP.y + (pContext.random() - 0.5) * r);
  }

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

  @Override
  public Object[] getParameterValues() {
    return new Object[] { strength, offset, center_x, center_y };
  }

  @Override
  public void setParameter(String pName, double pValue) {
    if (PARAM_STRENGTH.equalsIgnoreCase(pName))
      strength = pValue;
    else if (PARAM_OFFSET.equalsIgnoreCase(pName))
      offset = pValue;
    else if (PARAM_CENTER_X.equalsIgnoreCase(pName))
      center_x = pValue;
    else if (PARAM_CENTER_Y.equalsIgnoreCase(pName))
      center_y = pValue;
    else
      throw new IllegalArgumentException(pName);
  }

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

  private double s2;

  @Override
  public void init(FlameTransformationContext pContext, Layer pLayer, XForm pXForm, double pAmount) {
    s2 = 2.0 * strength;
  }

  @Override
  public int getPriority() {
    return 1;
  }
}