svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.geometry / org.gvsig.fmap.geometry.impl / src / main / java / org / gvsig / fmap / geom / primitive / impl / Surface2D.java @ 41160
History | View | Annotate | Download (7.56 KB)
1 |
/**
|
---|---|
2 |
* gvSIG. Desktop Geographic Information System.
|
3 |
*
|
4 |
* Copyright (C) 2007-2013 gvSIG Association.
|
5 |
*
|
6 |
* This program is free software; you can redistribute it and/or
|
7 |
* modify it under the terms of the GNU General Public License
|
8 |
* as published by the Free Software Foundation; either version 3
|
9 |
* of the License, or (at your option) any later version.
|
10 |
*
|
11 |
* This program is distributed in the hope that it will be useful,
|
12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
14 |
* GNU General Public License for more details.
|
15 |
*
|
16 |
* You should have received a copy of the GNU General Public License
|
17 |
* along with this program; if not, write to the Free Software
|
18 |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
19 |
* MA 02110-1301, USA.
|
20 |
*
|
21 |
* For any additional information, do not hesitate to contact us
|
22 |
* at info AT gvsig.com, or visit our website www.gvsig.com.
|
23 |
*/
|
24 |
package org.gvsig.fmap.geom.primitive.impl; |
25 |
|
26 |
import java.awt.geom.Rectangle2D; |
27 |
import java.util.ArrayList; |
28 |
import java.util.List; |
29 |
|
30 |
import com.vividsolutions.jts.geom.GeometryFactory; |
31 |
import com.vividsolutions.jts.geom.LineString; |
32 |
import com.vividsolutions.jts.geom.LinearRing; |
33 |
import com.vividsolutions.jts.geom.MultiPolygon; |
34 |
import com.vividsolutions.jts.geom.Polygon; |
35 |
import com.vividsolutions.jts.geom.PrecisionModel; |
36 |
import com.vividsolutions.jts.geom.TopologyException; |
37 |
import com.vividsolutions.jts.precision.GeometryPrecisionReducer; |
38 |
|
39 |
import org.cresques.cts.IProjection; |
40 |
|
41 |
import org.gvsig.fmap.geom.Geometry; |
42 |
import org.gvsig.fmap.geom.exception.CreateGeometryException; |
43 |
import org.gvsig.fmap.geom.operation.GeometryOperationException; |
44 |
import org.gvsig.fmap.geom.operation.GeometryOperationNotSupportedException; |
45 |
import org.gvsig.fmap.geom.primitive.FShape; |
46 |
import org.gvsig.fmap.geom.primitive.GeneralPathX; |
47 |
import org.gvsig.fmap.geom.primitive.Surface; |
48 |
import org.gvsig.fmap.geom.primitive.SurfaceAppearance; |
49 |
import org.gvsig.fmap.geom.type.GeometryType; |
50 |
import org.gvsig.fmap.geom.util.Converter; |
51 |
|
52 |
/**
|
53 |
* Pol�gono 2D.
|
54 |
*
|
55 |
* @author Vicente Caballero Navarro
|
56 |
*/
|
57 |
public class Surface2D extends OrientableSurface2D implements Surface { |
58 |
private static final long serialVersionUID = -8448256617197415743L; |
59 |
|
60 |
/**
|
61 |
* The constructor with the GeometryType like and argument
|
62 |
* is used by the {@link GeometryType}{@link #create()}
|
63 |
* to create the geometry
|
64 |
* @param type
|
65 |
* The geometry type
|
66 |
*/
|
67 |
public Surface2D(GeometryType geomType) {
|
68 |
super(geomType);
|
69 |
} |
70 |
|
71 |
/**
|
72 |
* Constructor used in the {@link Geometry#cloneGeometry()} method.
|
73 |
* @param geomType
|
74 |
* @param id
|
75 |
* @param projection
|
76 |
* @param gpx
|
77 |
*/
|
78 |
Surface2D(GeometryType geomType, String id, IProjection projection, GeneralPathX gpx) {
|
79 |
super(geomType, id, projection, gpx);
|
80 |
} |
81 |
|
82 |
/*
|
83 |
* (non-Javadoc)
|
84 |
* @see org.gvsig.fmap.geom.Geometry#getShapeType()
|
85 |
*/
|
86 |
public int getShapeType() { |
87 |
return TYPES.SURFACE;
|
88 |
} |
89 |
|
90 |
/*
|
91 |
* (non-Javadoc)
|
92 |
* @see org.gvsig.fmap.geom.primitive.FShape#cloneFShape()
|
93 |
*/
|
94 |
public FShape cloneFShape() {
|
95 |
return new Surface2D(getGeometryType(), id, projection, (GeneralPathX) gp.clone()); |
96 |
} |
97 |
|
98 |
/*
|
99 |
* (non-Javadoc)
|
100 |
* @see org.gvsig.fmap.geom.primitive.impl.OrientablePrimitive2D#intersects(java.awt.geom.Rectangle2D)
|
101 |
*/
|
102 |
public boolean intersects(Rectangle2D r) { |
103 |
return gp.intersects(r);
|
104 |
} |
105 |
|
106 |
public SurfaceAppearance getSurfaceAppearance() {
|
107 |
// TODO Auto-generated method stub
|
108 |
return null; |
109 |
} |
110 |
|
111 |
public void setSurfaceAppearance(SurfaceAppearance app) { |
112 |
// TODO Auto-generated method stub
|
113 |
|
114 |
} |
115 |
|
116 |
public Geometry union(Geometry other)
|
117 |
throws GeometryOperationNotSupportedException,
|
118 |
GeometryOperationException { |
119 |
|
120 |
com.vividsolutions.jts.geom.Geometry this_jts, other_jts, union_jts; |
121 |
Geometry resp = null;
|
122 |
|
123 |
try {
|
124 |
this_jts = getJTS(); |
125 |
other_jts = Converter.geometryToJts(other); |
126 |
union_jts = this_jts.union(other_jts); |
127 |
if (union_jts instanceof Polygon) { |
128 |
double tole = union_jts.getArea();
|
129 |
tole = tole * 1e-12;
|
130 |
union_jts = removeInvalidHoles((Polygon) union_jts, tole);
|
131 |
} else {
|
132 |
if (union_jts instanceof MultiPolygon) { |
133 |
double tole = union_jts.getArea();
|
134 |
tole = tole * 1e-12;
|
135 |
union_jts = |
136 |
removeInvalidHoles((MultiPolygon) union_jts, tole); |
137 |
} |
138 |
} |
139 |
resp = Converter.jtsToGeometry(union_jts); |
140 |
return resp;
|
141 |
} catch (CreateGeometryException e) {
|
142 |
throw new GeometryOperationException(e); |
143 |
} catch (TopologyException e) {
|
144 |
/*
|
145 |
* If JTS throws this, we'll try to simplify them
|
146 |
*/
|
147 |
try {
|
148 |
this_jts = getJTS(); |
149 |
other_jts = Converter.geometryToJts(other); |
150 |
|
151 |
PrecisionModel pm = new PrecisionModel(1000000); |
152 |
GeometryPrecisionReducer gpr = new GeometryPrecisionReducer(pm);
|
153 |
this_jts = gpr.reduce(this_jts); |
154 |
other_jts = gpr.reduce(other_jts); |
155 |
union_jts = this_jts.union(other_jts); |
156 |
|
157 |
if (union_jts instanceof Polygon) { |
158 |
double tole = union_jts.getArea();
|
159 |
tole = tole * 1e-12;
|
160 |
union_jts = removeInvalidHoles((Polygon) union_jts, tole);
|
161 |
} else {
|
162 |
if (union_jts instanceof MultiPolygon) { |
163 |
double tole = union_jts.getArea();
|
164 |
tole = tole * 1e-12;
|
165 |
union_jts = |
166 |
removeInvalidHoles((MultiPolygon) union_jts, tole); |
167 |
} |
168 |
} |
169 |
|
170 |
resp = Converter.jtsToGeometry(union_jts); |
171 |
return resp;
|
172 |
} catch (Exception exc) { |
173 |
throw new GeometryOperationException(exc); |
174 |
} |
175 |
} |
176 |
} |
177 |
|
178 |
|
179 |
private com.vividsolutions.jts.geom.Geometry getJTS() {
|
180 |
return Converter.geometryToJts(this); |
181 |
} |
182 |
|
183 |
private MultiPolygon removeInvalidHoles(MultiPolygon mpo, double tol) { |
184 |
|
185 |
GeometryFactory gf = new GeometryFactory(mpo.getPrecisionModel());
|
186 |
|
187 |
int npo = mpo.getNumGeometries();
|
188 |
Polygon[] pos = new Polygon[npo]; |
189 |
for (int i=0; i<npo; i++) { |
190 |
pos[i] = removeInvalidHoles((Polygon) mpo.getGeometryN(i), tol);
|
191 |
} |
192 |
return gf.createMultiPolygon(pos);
|
193 |
} |
194 |
|
195 |
private Polygon removeInvalidHoles(Polygon po, double tol) { |
196 |
|
197 |
GeometryFactory gf = new GeometryFactory(po.getPrecisionModel());
|
198 |
|
199 |
int nholes = po.getNumInteriorRing();
|
200 |
List validholes = new ArrayList(); |
201 |
for (int i=0; i<nholes; i++) { |
202 |
LineString ls = po.getInteriorRingN(i); |
203 |
LinearRing lr = toLinearRing(ls, gf); |
204 |
if (getLinearRingArea(lr, gf) > tol) {
|
205 |
validholes.add(lr); |
206 |
} |
207 |
|
208 |
} |
209 |
|
210 |
if (validholes.size() < nholes) {
|
211 |
|
212 |
LinearRing[] holes = (LinearRing[]) validholes.toArray(new LinearRing[0]); |
213 |
return gf.createPolygon(
|
214 |
toLinearRing(po.getExteriorRing(), gf), holes); |
215 |
} else {
|
216 |
return po;
|
217 |
} |
218 |
|
219 |
} |
220 |
|
221 |
private double getLinearRingArea(LinearRing lr, GeometryFactory gf) { |
222 |
Polygon po = gf.createPolygon(lr);
|
223 |
double resp = po.getArea();
|
224 |
return resp;
|
225 |
} |
226 |
|
227 |
private LinearRing toLinearRing(LineString ls, GeometryFactory gf) {
|
228 |
return gf.createLinearRing(ls.getCoordinateSequence());
|
229 |
} |
230 |
|
231 |
|
232 |
|
233 |
|
234 |
} |