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 QuadraticSmooth extends PathCommand {
047
048    public float x = 0f;
049    public float y = 0f;
050
051    /** Creates a new instance of MoveTo */
052    public QuadraticSmooth() {
053    }
054
055    public String toString()
056    {
057        return "T " + x + " " + y;
058    }
059
060    public QuadraticSmooth(boolean isRelative, float x, float y) {
061        super(isRelative);
062        this.x = x;
063        this.y = y;
064    }
065
066//    public void appendPath(ExtendedGeneralPath path, BuildHistory hist)
067    public void appendPath(GeneralPath path, BuildHistory hist)
068    {
069        float offx = isRelative ? hist.lastPoint.x : 0f;
070        float offy = isRelative ? hist.lastPoint.y : 0f;
071
072        float oldKx = hist.lastKnot.x;
073        float oldKy = hist.lastKnot.y;
074        float oldX = hist.lastPoint.x;
075        float oldY = hist.lastPoint.y;
076        //Calc knot as reflection of old knot
077        float kx = oldX * 2f - oldKx;
078        float ky = oldY * 2f - oldKy;
079
080        path.quadTo(kx, ky, x + offx, y + offy);
081        hist.setLastPoint(x + offx, y + offy);
082        hist.setLastKnot(kx, ky);
083    }
084
085    public int getNumKnotsAdded()
086    {
087        return 4;
088    }
089}