/*
  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 static org.jwildfire.base.mathlib.MathLib.sin;

import org.jwildfire.base.Tools;

import static org.jwildfire.base.mathlib.MathLib.fmod;
import static org.jwildfire.base.mathlib.MathLib.M_2PI;

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

public class Spirograph3DFunc extends VariationFunc {
  private static final long serialVersionUID = 1L;
  private static final String PARAM_A = "a";
  private static final String PARAM_B = "b";
  private static final String PARAM_C = "c";
  private static final String PARAM_TMIN = "tmin";
  private static final String PARAM_TMAX = "tmax";
  private static final String PARAM_WIDTH = "width";
  private static final String PARAM_MODE = "mode";
  private static final String PARAM_DIRECT_COLOR = "direct_color";

  private static final String[] paramNames = { PARAM_A, PARAM_B, PARAM_C, PARAM_TMIN, PARAM_TMAX, PARAM_WIDTH, PARAM_MODE, PARAM_DIRECT_COLOR };

  private double a = 1.0;
  private double b = -0.3;
  private double c = 0.4;
  private double tmin = 0.0;
  private double tmax = 1000.0;
  private double width = 0.0;
  private int mode = 0;
  private int direct_color = 0;

  @Override
  public void transform(FlameTransformationContext pContext, XForm pXForm, XYZPoint pAffineTP, XYZPoint pVarTP, double pAmount) {
    double t = (tmax - tmin) * pContext.random() + tmin;
    double w1, w2, w3;
    switch(mode) {
    case 0:
    	w1 = w2 = w3 = width * pContext.random() - width/2;
    	break;
    case 1:
    	w1 = width * pContext.random() - width/2;
    	w2 = w1 * sin(36*t + M_2PI/3);
    	w3 = w1 * sin(36*t + 2*M_2PI/3);
    	w1 = w1 * sin(36*t);
    	break;
    case 2:
    	w1 = width * pContext.random() - width/2;
    	w2 = width * pContext.random() - width/2;
    	w3 = width * pContext.random() - width/2;
    	break;
    case 3:
    	w1 = width * (pContext.random() + pContext.random() + pContext.random() + pContext.random() - 2)/2;
    	w2 = width * (pContext.random() + pContext.random() + pContext.random() + pContext.random() - 2)/2;
    	w3 = width * (pContext.random() + pContext.random() + pContext.random() + pContext.random() - 2)/2;
    	break;
    case 4:
    	w1 = (pContext.random()<0.5) ? width : -width;
    	w2 = w3 = 0;
    	break;
    default:
    	w1 = w2 = w3 = 0;
    }
    
    double x1 = (a + b) * cos(t) - c * cos((a + b) / b * t);
    double y1 = (a + b) * sin(t) - c * sin((a + b) / b * t);
    double z1 = c * sin((a + b) / b * t);
    pVarTP.x += pAmount * (x1 + w1);
    pVarTP.y += pAmount * (y1 + w2);
    pVarTP.z += pAmount * (z1 + w3);
    if (direct_color != 0) {
    	pVarTP.color = fmod(t/M_2PI,1);
    }
  }

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

  @Override
  public Object[] getParameterValues() {
    return new Object[] { a, b, c, tmin, tmax, width, mode, direct_color };
  }

  @Override
  public void setParameter(String pName, double pValue) {
    if (PARAM_A.equalsIgnoreCase(pName))
      a = pValue;
    else if (PARAM_B.equalsIgnoreCase(pName))
      b = pValue;
    else if (PARAM_C.equalsIgnoreCase(pName))
      c = pValue;
    else if (PARAM_TMIN.equalsIgnoreCase(pName))
      tmin = pValue;
    else if (PARAM_TMAX.equalsIgnoreCase(pName))
      tmax = pValue;
    else if (PARAM_WIDTH.equalsIgnoreCase(pName))
      width = pValue;
    else if (PARAM_MODE.equalsIgnoreCase(pName))
      mode = limitIntVal(Tools.FTOI(pValue),0,4);
    else if (PARAM_DIRECT_COLOR.equalsIgnoreCase(pName))
      direct_color = limitIntVal(Tools.FTOI(pValue), 0, 1);
    else
      throw new IllegalArgumentException(pName);
  }

  @Override
  public String getName() {
    return "spirograph3D";
  }

}