1/**************************************************************************/
2/* quick_hull.h */
3/**************************************************************************/
4/* This file is part of: */
5/* GODOT ENGINE */
6/* https://godotengine.org */
7/**************************************************************************/
8/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
9/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
10/* */
11/* Permission is hereby granted, free of charge, to any person obtaining */
12/* a copy of this software and associated documentation files (the */
13/* "Software"), to deal in the Software without restriction, including */
14/* without limitation the rights to use, copy, modify, merge, publish, */
15/* distribute, sublicense, and/or sell copies of the Software, and to */
16/* permit persons to whom the Software is furnished to do so, subject to */
17/* the following conditions: */
18/* */
19/* The above copyright notice and this permission notice shall be */
20/* included in all copies or substantial portions of the Software. */
21/* */
22/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
23/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
24/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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27/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
28/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
29/**************************************************************************/
30
31#ifndef QUICK_HULL_H
32#define QUICK_HULL_H
33
34#include "core/math/aabb.h"
35#include "core/math/geometry_3d.h"
36#include "core/templates/hash_set.h"
37#include "core/templates/list.h"
38
39class QuickHull {
40public:
41 struct Edge {
42 union {
43 uint32_t vertices[2];
44 uint64_t id = 0;
45 };
46
47 static uint32_t hash(const Edge &p_edge) {
48 return hash_one_uint64(p_edge.id);
49 }
50
51 bool operator<(const Edge &p_edge) const {
52 return id < p_edge.id;
53 }
54 bool operator==(const Edge &p_edge) const {
55 return id == p_edge.id;
56 }
57
58 Edge(int p_vtx_a = 0, int p_vtx_b = 0) {
59 if (p_vtx_a > p_vtx_b) {
60 SWAP(p_vtx_a, p_vtx_b);
61 }
62
63 vertices[0] = p_vtx_a;
64 vertices[1] = p_vtx_b;
65 }
66 };
67
68 struct Face {
69 Plane plane;
70 uint32_t vertices[3] = { 0 };
71 Vector<int> points_over;
72
73 bool operator<(const Face &p_face) const {
74 return points_over.size() < p_face.points_over.size();
75 }
76 };
77
78private:
79 struct FaceConnect {
80 List<Face>::Element *left = nullptr;
81 List<Face>::Element *right = nullptr;
82 FaceConnect() {}
83 };
84 struct RetFaceConnect {
85 List<Geometry3D::MeshData::Face>::Element *left = nullptr;
86 List<Geometry3D::MeshData::Face>::Element *right = nullptr;
87 RetFaceConnect() {}
88 };
89
90public:
91 static uint32_t debug_stop_after;
92 static Error build(const Vector<Vector3> &p_points, Geometry3D::MeshData &r_mesh);
93};
94
95#endif // QUICK_HULL_H
96