src/types/boundingbox.cpp

Sat, 05 Mar 2022 13:18:40 +0200

author
Teemu Piippo <teemu@hecknology.net>
date
Sat, 05 Mar 2022 13:18:40 +0200
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child 189
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permissions
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Icons update

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1 /*
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2 * LDForge: LDraw parts authoring CAD
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3 * Copyright (C) 2013 - 2019 Teemu Piippo
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4 *
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5 * This program is free software: you can redistribute it and/or modify
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6 * it under the terms of the GNU General Public License as published by
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7 * the Free Software Foundation, either version 3 of the License, or
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8 * (at your option) any later version.
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9 *
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10 * This program is distributed in the hope that it will be useful,
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 * GNU General Public License for more details.
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14 *
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15 * You should have received a copy of the GNU General Public License
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16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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17 */
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18
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19 #include "boundingbox.h"
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20
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21 BoundingBox& BoundingBox::operator<<(const glm::vec3& vertex)
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22 {
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23 this->consider(vertex);
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24 return *this;
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25 }
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26
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27 void BoundingBox::consider(const glm::vec3& vertex)
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28 {
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29 this->minimum.x = math::min(vertex.x, this->minimum.x);
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30 this->minimum.y = math::min(vertex.y, this->minimum.y);
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31 this->minimum.z = math::min(vertex.z, this->minimum.z);
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32 this->maximum.x = math::max(vertex.x, this->maximum.x);
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33 this->maximum.y = math::max(vertex.y, this->maximum.y);
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34 this->maximum.z = math::max(vertex.z, this->maximum.z);
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35 }
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36
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37 /*
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38 * Returns the length of the bounding box on the longest measure.
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39 */
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40 float longestMeasure(const BoundingBox& box)
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41 {
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42 if (box != emptyBoundingBox)
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43 {
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44 const float dx = std::abs(box.minimum.x - box.maximum.x);
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45 const float dy = std::abs(box.minimum.y - box.maximum.y);
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46 const float dz = std::abs(box.minimum.z - box.maximum.z);
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47 const float size = std::max(std::max(dx, dy), dz);
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48 return std::max(size / 2.0f, 1.0f);
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49 }
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50 else
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51 {
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52 return 0.0f;
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53 }
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54 }
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57 /*
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58 * Yields the center of the bounding box.
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59 */
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60 glm::vec3 boxCenter(const BoundingBox& box)
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61 {
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62 if (box != emptyBoundingBox)
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63 {
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64 return {
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65 (box.minimum.x + box.maximum.x) / 2,
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66 (box.minimum.y + box.maximum.y) / 2,
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67 (box.minimum.z + box.maximum.z) / 2
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68 };
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69 }
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70 else
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71 {
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72 return glm::vec3{0, 0, 0};
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73 }
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74 }
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76 /*
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77 * Returns the length of the bounding box's space diagonal.
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78 */
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79 float spaceDiagonal(const BoundingBox& box)
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80 {
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81 return glm::distance(box.minimum, box.maximum);
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82 }
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83
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84 bool operator==(const BoundingBox &box_1, const BoundingBox &box_2)
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85 {
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86 return box_1.minimum == box_2.minimum and box_1.maximum == box_2.maximum;
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87 }
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88
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89 bool operator!=(const BoundingBox &box_1, const BoundingBox &box_2)
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90 {
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91 return not (box_1 == box_2);
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92 }

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