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17 package org.apache.commons.geometry.euclidean.threed;
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19 import java.util.ArrayList;
20 import java.util.Collections;
21 import java.util.List;
22 import java.util.stream.Collectors;
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24 import org.apache.commons.geometry.core.Transform;
25 import org.apache.commons.geometry.euclidean.internal.EuclideanUtils;
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30 final class VertexListConvexPolygon3D extends AbstractConvexPolygon3D {
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33 private final List<Vector3D> vertices;
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42 VertexListConvexPolygon3D(final Plane plane, final List<Vector3D> vertices) {
43 super(plane);
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46 if (vertices.size() < EuclideanUtils.TRIANGLE_VERTEX_COUNT) {
47 throw new IllegalArgumentException("Convex polygon requires at least " +
48 EuclideanUtils.TRIANGLE_VERTEX_COUNT + " points; found " + vertices.size());
49 }
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51 this.vertices = Collections.unmodifiableList(vertices);
52 }
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54
55 @Override
56 public List<Vector3D> getVertices() {
57 return vertices;
58 }
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61 @Override
62 public List<Triangle3D> toTriangles() {
63 return Planes.convexPolygonToTriangleFan(getPlane(), vertices);
64 }
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67 @Override
68 public VertexListConvexPolygon3D transform(final Transform<Vector3D> transform) {
69 final Plane tPlane = getPlane().transform(transform);
70 final List<Vector3D> tVertices = vertices.stream()
71 .map(transform)
72 .collect(Collectors.toList());
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74 return new VertexListConvexPolygon3D(tPlane, tVertices);
75 }
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78 @Override
79 public VertexListConvexPolygon3D reverse() {
80 final Plane rPlane = getPlane().reverse();
81 final List<Vector3D> rVertices = new ArrayList<>(vertices);
82 Collections.reverse(rVertices);
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84 return new VertexListConvexPolygon3D(rPlane, rVertices);
85 }
86 }