TileHlpFunc.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.cos;

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

public class TileHlpFunc extends VariationFunc {
  private static final long serialVersionUID = 1L;
  private static final String PARAM_WIDTH = "width";
  private static final String PARAM_HEIGHT = "height";
  private static final String[] paramNames = { PARAM_WIDTH, PARAM_HEIGHT };
  private double width = 1.0;
  private double height = 1.0;

  @Override
  public void transform(FlameTransformationContext pContext, XForm pXForm, XYZPoint pAffineTP, XYZPoint pVarTP, double pAmount) {
    // "tile_hlp" variation created by Zy0rg implemented into JWildfire by Tatyana Zabanova and Brad Stefanov
    double width2 = width * pAmount;
    double height2 = height * pAmount;
    double x = pAffineTP.x / width;
    double y = pAffineTP.y / height;
    double aux = 0;
    if (x > 0.0) {
      aux = x - (int) x;
    }
    else {
      aux = x + (int) x;
    }
    aux = cos(aux);
    double aux2 = 0;
    if (aux < pContext.random() * 2.0 - 1.0) {
      if (x > 0) {
        aux2 = -width2;
      }
      else {
        aux2 = width2;
      }
    }

    double aux3 = 0;
    if (y > 0.0) {
      aux3 = y - (int) y;
    }
    else {
      aux3 = y + (int) y;
    }
    aux3 = cos(aux3);
    double aux4 = 0;
    if (aux3 < pContext.random() * 2.0 - 1.0) {
      if (y > 0) {
        aux4 = -height2;
      }
      else {
        aux4 = height2;
      }
    }
    pVarTP.x += pAffineTP.x * pAmount + aux2;
    pVarTP.y += pAffineTP.y * pAmount + aux4;
    if (pContext.isPreserveZCoordinate()) {
      pVarTP.z += pAmount * pAffineTP.z;
    }
  }

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

  @Override
  public Object[] getParameterValues() {
    return new Object[] { width, height };
  }

  @Override
  public void setParameter(String pName, double pValue) {
    if (PARAM_WIDTH.equalsIgnoreCase(pName))
      width = pValue;
    else if (PARAM_HEIGHT.equalsIgnoreCase(pName))
      height = pValue;
    else
      throw new IllegalArgumentException(pName);
  }

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