/*
Copyright 2008 Simon Mieth
Licensed 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 org.kabeja.dxf.helpers;
import org.kabeja.dxf.DXFMLine;
import org.kabeja.dxf.DXFPolyline;
import org.kabeja.dxf.DXFVertex;
import org.kabeja.dxf.objects.DXFMLineStyle;
import org.kabeja.dxf.objects.DXFMLineStyleElement;
import org.kabeja.math.MathUtils;
public class MLineConverter {
public static DXFPolyline[] toDXFPolyline(DXFMLine mline) {
DXFMLineStyle style = (DXFMLineStyle) mline.getDXFDocument()
.getDXFObjectByID(mline.getMLineStyleID());
// style
// .sortDXFMLineStyleElements(new
// DXFMLineStyleElementDistanceComparator());
// initialize polylines
DXFPolyline[] pl = new DXFPolyline[style.getDXFMLineStyleLElementCount()];
for (int x = 0; x < pl.length; x++) {
DXFMLineStyleElement se = style.getDXFMLineStyleLElement(x);
pl[x] = new DXFPolyline();
pl[x].setDXFDocument(mline.getDXFDocument());
pl[x].setLineType(se.getLineType());
pl[x].setColor(se.getLineColor());
if (mline.isClosed()) {
pl[x].setFlags(1);
}
}
Vector v = new Vector();
Vector d = new Vector();
ParametricLine l = new ParametricLine();
ParametricLine miter = new ParametricLine();
for (int i = 0; i < mline.getDXFMLineSegmentCount(); i++) {
DXFMLineSegment seg = mline.getDXFMLineSegment(i);
v = seg.getDirection();
d = seg.getMiterDirection();
miter.setStartPoint(seg.getStartPoint());
miter.setDirectionVector(d);
for (int x = 0; x < seg.getDXFMLineSegmentElementCount(); x++) {
DXFMLineSegmentElement segEl = seg.getDXFMLineSegmentElement(x);
double[] le = segEl.getLengthParameters();
Point s = miter.getPointAt(le[0]);
l.setStartPoint(s);
l.setDirectionVector(v);
pl[x].addVertex(new DXFVertex(l.getPointAt(le[1])));
}
}
if (style.hasEndRoundCaps()) {
Point p1 = pl[0].getVertex(pl[0].getVertexCount() - 1).getPoint();
Point p2 = pl[pl.length - 1].getVertex(pl[pl.length - 1].getVertexCount() -
1).getPoint();
Vector v1 = MathUtils.getVector(p1, p2);
double distance = v1.getLength();
double r = distance / 2;
double length = Math.sqrt(2) * r;
double h = r - (Math.sqrt(0.5) * r);
double bulge = (h * 2) / length;
v1.normalize();
ParametricLine line = new ParametricLine(p1, v1);
Point center = line.getPointAt(r);
line.setStartPoint(center);
v.normalize();
line.setDirectionVector(v);
center = line.getPointAt(r);
pl[0].getVertex(pl[0].getVertexCount() - 1).setBulge(-1 * bulge);
pl[0].addVertex(new DXFVertex(center));
pl[pl.length - 1].getVertex(pl[pl.length - 1].getVertexCount() - 1)
.setBulge(bulge);
pl[pl.length - 1].addVertex(new DXFVertex(center));
}
return pl;
}
}