1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.commons.geometry.euclidean.threed;
18
19 import java.util.Iterator;
20 import java.util.stream.Stream;
21
22
23 /** Class used to construct {@link Bounds3D} instances representing the min and
24 * max points present in a {@link BoundarySource3D}. The implementation examines
25 * the vertices of each boundary in turn. Null is returned if any boundaries are
26 * infinite or no vertices are present.
27 */
28 final class BoundarySourceBoundsBuilder3D {
29
30 /** Get a {@link Bounds3D} instance containing all vertices in the given boundary source.
31 * Null is returned if any encountered boundaries were not finite or no vertices were found.
32 * @param src the boundary source to compute the bounds of
33 * @return the bounds of the argument or null if no valid bounds could be determined
34 */
35 public Bounds3D getBounds(final BoundarySource3D src) {
36 final Bounds3D.Builder builder = Bounds3D.builder();
37
38 try (Stream<PlaneConvexSubset> stream = src.boundaryStream()) {
39 final Iterator<PlaneConvexSubset> it = stream.iterator();
40
41 PlaneConvexSubset boundary;
42 while (it.hasNext()) {
43 boundary = it.next();
44
45 if (!boundary.isFinite()) {
46 return null;
47 }
48
49 builder.addAll(boundary.getVertices());
50 }
51 }
52
53 return builder.hasBounds() ?
54 builder.build() :
55 null;
56 }
57 }