FarBlurFunc.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_2PI;
import static org.jwildfire.base.mathlib.MathLib.cos;
import static org.jwildfire.base.mathlib.MathLib.sin;
import static org.jwildfire.base.mathlib.MathLib.sqr;

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

public class FarBlurFunc 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_Z = "z";
  private static final String PARAM_X_ORIGIN = "x_origin";
  private static final String PARAM_Y_ORIGIN = "y_origin";
  private static final String PARAM_Z_ORIGIN = "z_origin";

  private static final String[] paramNames = { PARAM_X, PARAM_Y, PARAM_Z, PARAM_X_ORIGIN, PARAM_Y_ORIGIN, PARAM_Z_ORIGIN };

  private double x = 1.0;
  private double y = 1.0;
  private double z = 1.0;
  private double x_origin = 0.0;
  private double y_origin = 0.0;
  private double z_origin = 0.0;

  @Override
  public void transform(FlameTransformationContext pContext, XForm pXForm, XYZPoint pAffineTP, XYZPoint pVarTP, double pAmount) {
    /* farblur by zephyrtronium, http://zephyrtronium.deviantart.com/art/Farblur-Apophysis-Plugin-170718419?q=gallery%3Afractal-resources%2F24660058&qo=10 */
    double r = pAmount * (sqr(pVarTP.x - x_origin) +
        sqr(pVarTP.y - y_origin) +
        sqr(pVarTP.z - z_origin)) *
        (this._r[0] + this._r[1] + this._r[2] + this._r[3] - 2.0);
    this._r[_n] = pContext.random();
    _n = (_n + 1) & 3;
    double u = pContext.random() * M_2PI;
    double su = sin(u);
    double cu = cos(u);
    double v = pContext.random() * M_2PI;
    double sv = sin(v);
    double cv = cos(v);

    pVarTP.x += x * r * sv * cu;
    pVarTP.y += y * r * sv * su;
    pVarTP.z += z * r * cv;
  }

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

  @Override
  public Object[] getParameterValues() {
    return new Object[] { x, y, z, x_origin, y_origin, z_origin };
  }

  @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_Z.equalsIgnoreCase(pName))
      z = pValue;
    else if (PARAM_X_ORIGIN.equalsIgnoreCase(pName))
      x_origin = pValue;
    else if (PARAM_Y_ORIGIN.equalsIgnoreCase(pName))
      y_origin = pValue;
    else if (PARAM_Z_ORIGIN.equalsIgnoreCase(pName))
      z_origin = pValue;
    else
      throw new IllegalArgumentException(pName);
  }

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

  private double _r[] = new double[4];
  private int _n;

  @Override
  public void init(FlameTransformationContext pContext, Layer pLayer, XForm pXForm, double pAmount) {
    _n = 0;
    _r[0] = pContext.random();
    _r[1] = pContext.random();
    _r[2] = pContext.random();
    _r[3] = pContext.random();
  }

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

}