001/*
002 * SVG Salamander
003 * Copyright (c) 2004, Mark McKay
004 * All rights reserved.
005 *
006 * Redistribution and use in source and binary forms, with or 
007 * without modification, are permitted provided that the following
008 * conditions are met:
009 *
010 *   - Redistributions of source code must retain the above 
011 *     copyright notice, this list of conditions and the following
012 *     disclaimer.
013 *   - Redistributions in binary form must reproduce the above
014 *     copyright notice, this list of conditions and the following
015 *     disclaimer in the documentation and/or other materials 
016 *     provided with the distribution.
017 *
018 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
019 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
020 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
021 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
022 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
023 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
024 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
025 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
026 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
027 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
028 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
029 * OF THE POSSIBILITY OF SUCH DAMAGE. 
030 * 
031 * Mark McKay can be contacted at mark@kitfox.com.  Salamander and other
032 * projects can be found at http://www.kitfox.com
033 *
034 * Created on January 26, 2004, 8:40 PM
035 */
036
037package com.kitfox.svg.pathcmd;
038
039//import org.apache.batik.ext.awt.geom.ExtendedGeneralPath;
040import java.awt.geom.*;
041
042/**
043 * @author Mark McKay
044 * @author <a href="mailto:mark@kitfox.com">Mark McKay</a>
045 */
046public class CubicSmooth extends PathCommand {
047
048    public float x = 0f;
049    public float y = 0f;
050    public float k2x = 0f;
051    public float k2y = 0f;
052
053    /** Creates a new instance of MoveTo */
054    public CubicSmooth() {
055    }
056
057    public CubicSmooth(boolean isRelative, float k2x, float k2y, float x, float y) {
058        super(isRelative);
059        this.k2x = k2x;
060        this.k2y = k2y;
061        this.x = x;
062        this.y = y;
063    }
064
065//    public void appendPath(ExtendedGeneralPath path, BuildHistory hist)
066    public void appendPath(GeneralPath path, BuildHistory hist)
067    {
068        float offx = isRelative ? hist.lastPoint.x : 0f;
069        float offy = isRelative ? hist.lastPoint.y : 0f;
070
071        float oldKx = hist.lastKnot.x;
072        float oldKy = hist.lastKnot.y;
073        float oldX = hist.lastPoint.x;
074        float oldY = hist.lastPoint.y;
075        //Calc knot as reflection of old knot
076        float k1x = oldX * 2f - oldKx;
077        float k1y = oldY * 2f - oldKy;
078
079        path.curveTo(k1x, k1y, k2x + offx, k2y + offy, x + offx, y + offy);
080        hist.setLastPoint(x + offx, y + offy);
081        hist.setLastKnot(k2x + offx, k2y + offy);
082    }
083    
084    public int getNumKnotsAdded()
085    {
086        return 6;
087    }
088
089    public String toString()
090    {
091        return "S " + k2x + " " + k2y
092             + " " + x + " " + y;
093    }
094}