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A Java based CSG Cad library
/*
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package com.piro.bezier;
import java.util.ArrayList;
/**
* A handler class that generates an array of shorts and an array double s from
* parsing path data.
*
* @author Cameron McCormack
* @version $Id: PathArrayProducer.java 475685 2006-11-16 11:16:05Z cam $
*/
public class BezierListProducer implements PathHandler {
final ArrayList bezierSegs = new ArrayList();
double [] coords = new double [6];
double curveLength = 0f;
BezierHistory hist = new BezierHistory();
@Override
public void startPath() throws ParseException {
curveLength = 0f;
bezierSegs.clear();
}
@Override
public void movetoRel(double x, double y) throws ParseException {
double offx = hist.lastPoint.x;
double offy = hist.lastPoint.y;
movetoAbs(offx + x, offy + y);;
}
@Override
public void movetoAbs(double x, double y) throws ParseException {
hist.setLastPoint(x, y);
}
@Override
public void closePath() throws ParseException {
//command(SVGPathSeg.PATHSEG_CLOSEPATH);
}
@Override
public void linetoRel(double x, double y) throws ParseException {
double offx = hist.lastPoint.x;
double offy = hist.lastPoint.y;
linetoAbs(offx + x, offy + y);
}
@Override
public void linetoAbs(double x, double y) throws ParseException {
coords[0] = x;
coords[1] = y;
Bezier b = new Bezier(hist.lastPoint.x, hist.lastPoint.y, coords, 1);
bezierSegs.add(b);
curveLength += b.getLength();
hist.setLastPoint(x, y);
hist.setLastKnot(x, y);
}
@Override
public void linetoHorizontalRel(double x) throws ParseException {
linetoAbs(x + hist.lastPoint.x, hist.lastPoint.y);
}
@Override
public void linetoHorizontalAbs(double x) throws ParseException {
linetoAbs(x, hist.lastPoint.y);
}
@Override
public void linetoVerticalRel(double y) throws ParseException {
linetoAbs(hist.lastPoint.x, y + hist.lastPoint.y);
}
@Override
public void linetoVerticalAbs(double y) throws ParseException {
linetoAbs(hist.lastPoint.x, y);
}
@Override
public void curvetoCubicRel(double x1, double y1,
double x2, double y2,
double x, double y) throws ParseException {
double offx = hist.lastPoint.x;
double offy = hist.lastPoint.y;
curvetoCubicAbs(x1 + offx, y1 + offy,
x2 + offx, y2 + offy,
x + offx, y + offy);
}
@Override
public void curvetoCubicAbs(double x1, double y1,
double x2, double y2,
double x, double y) throws ParseException {
coords[0] = x1;
coords[1] = y1;
coords[2] = x2;
coords[3] = y2;
coords[4] = x;
coords[5] = y;
Bezier b = new Bezier(hist.lastPoint.x, hist.lastPoint.y, coords, 3);
bezierSegs.add(b);
curveLength += b.getLength();
hist.setLastPoint(x, y);
hist.setLastKnot(x2, y2);
}
@Override
public void curvetoCubicSmoothRel(double x2, double y2,
double x, double y) throws ParseException {
double offx = hist.lastPoint.x;
double offy = hist.lastPoint.y;
curvetoCubicSmoothAbs(x2 + offx, y2 + offy, x + offx, y + offy);
}
@Override
public void curvetoCubicSmoothAbs(double x2, double y2,
double x, double y) throws ParseException {
double oldKx = hist.lastKnot.x;
double oldKy = hist.lastKnot.y;
double oldX = hist.lastPoint.x;
double oldY = hist.lastPoint.y;
//Calc knot as reflection of old knot
double k1x = oldX * 2f - oldKx;
double k1y = oldY * 2f - oldKy;
coords[0] = k1x;
coords[1] = k1y;
coords[2] = x2;
coords[3] = y2;
coords[4] = x;
coords[5] = y;
Bezier b = new Bezier(hist.lastPoint.x, hist.lastPoint.y, coords, 3);
bezierSegs.add(b);
curveLength += b.getLength();
hist.setLastPoint(x, y);
hist.setLastKnot(x2, y2);
}
@Override
public void curvetoQuadraticRel(double x1, double y1,
double x, double y) throws ParseException {
double offx = hist.lastPoint.x;
double offy = hist.lastPoint.y;
curvetoQuadraticAbs(x1 + offx, y1 + offy, x + offx, y + offy);
}
@Override
public void curvetoQuadraticAbs(double x1, double y1,
double x, double y) throws ParseException {
coords[0] = x1;
coords[1] = y1;
coords[2] = x;
coords[3] = y;
Bezier b = new Bezier(hist.lastPoint.x, hist.lastPoint.y, coords, 2);
bezierSegs.add(b);
curveLength += b.getLength();
hist.setLastPoint(x, y);
hist.setLastKnot(x1, y1);
}
@Override
public void curvetoQuadraticSmoothRel(double x, double y) {
double offx = hist.lastPoint.x;
double offy = hist.lastPoint.y;
curvetoQuadraticSmoothAbs(x + offx, y + offy);
}
@Override
public void curvetoQuadraticSmoothAbs(double x, double y)
throws ParseException {
curvetoQuadraticAbs(hist.lastKnot.x, hist.lastKnot.y, x, y);
}
@Override
public void arcRel(double rx, double ry,
double xAxisRotation,
boolean largeArcFlag, boolean sweepFlag,
double x, double y) throws ParseException {
}
@Override
public void arcAbs(double rx, double ry,
double xAxisRotation,
boolean largeArcFlag, boolean sweepFlag,
double x, double y) throws ParseException {
}
@Override
public void endPath() throws ParseException {
hist.setLastPoint(hist.startPoint.x, hist.startPoint.y);
hist.setLastKnot(hist.startPoint.x, hist.startPoint.y);
}
}
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