[191] | 1 | // This file is a part of the Framsticks GDK. |
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| 2 | // Copyright (C) 2002-2014 Maciej Komosinski and Szymon Ulatowski. See LICENSE.txt for details. |
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| 3 | // Refer to http://www.framsticks.com/ for further information. |
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| 4 | |
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| 5 | #include "geometryutils.h" |
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| 6 | |
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| 7 | #include <math.h> |
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| 8 | |
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| 9 | double GeometryUtils::pointPosition(const int pointIndex, const int numberOfPoints) |
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| 10 | { |
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| 11 | return pointIndex / (numberOfPoints-1.0); |
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| 12 | } |
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| 13 | |
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| 14 | double GeometryUtils::pointOnAxis(const double scale, const double position) |
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| 15 | { |
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| 16 | return (position-0.5) * scale; |
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| 17 | } |
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| 18 | |
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| 19 | double GeometryUtils::pointOnAxis(const double scale, const int pointIndex, const int numberOfPoints) |
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| 20 | { |
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| 21 | return pointOnAxis(scale, pointPosition(pointIndex, numberOfPoints)); |
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| 22 | } |
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| 23 | |
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| 24 | double GeometryUtils::combination(const double value1, const double value2, const double position) |
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| 25 | { |
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| 26 | return value1 + position * (value2-value1); |
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| 27 | } |
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| 28 | |
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| 29 | double GeometryUtils::combination(const double value1, const double value2, const int pointIndex, const int numberOfPoints) |
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| 30 | { |
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| 31 | return combination(value1, value2, pointPosition(pointIndex, numberOfPoints)); |
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| 32 | } |
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| 33 | |
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| 34 | bool GeometryUtils::isPointInsideModelExcludingPart(const Pt3D &point, const Model *model, const int excludedPartIndex) |
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| 35 | { |
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| 36 | for (int i = 0; i < excludedPartIndex; i++) |
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| 37 | { |
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| 38 | if (isPointInsidePart(point, model->getPart(i))) |
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| 39 | { |
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| 40 | return true; |
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| 41 | } |
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| 42 | } |
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| 43 | |
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| 44 | for (int i = excludedPartIndex+1; i < model->getPartCount(); i++) |
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| 45 | { |
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| 46 | if (isPointStrictlyInsidePart(point, model->getPart(i))) |
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| 47 | { |
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| 48 | return true; |
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| 49 | } |
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| 50 | } |
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| 51 | |
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| 52 | return false; |
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| 53 | } |
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| 54 | |
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| 55 | bool GeometryUtils::isPointInsideModel(const Pt3D &point, const Model &model) |
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| 56 | { |
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| 57 | for (int i = 0; i < model.getPartCount(); i++) |
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| 58 | { |
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| 59 | if (isPointInsidePart(point, model.getPart(i))) |
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| 60 | { |
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| 61 | return true; |
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| 62 | } |
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| 63 | } |
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| 64 | |
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| 65 | return false; |
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| 66 | } |
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| 67 | |
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| 68 | bool GeometryUtils::isPointInsidePart(const Pt3D &point, const Part *part) |
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| 69 | { |
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| 70 | switch (part->shape) |
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| 71 | { |
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| 72 | case Part::SHAPE_ELLIPSOID: |
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| 73 | return isPointInsideEllipsoid(point, part); |
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| 74 | break; |
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| 75 | |
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| 76 | case Part::SHAPE_CUBOID: |
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| 77 | return isPointInsideCuboid(point, part); |
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| 78 | break; |
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| 79 | |
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| 80 | case Part::SHAPE_CYLINDER: |
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| 81 | return isPointInsideCylinder(point, part); |
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| 82 | break; |
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| 83 | } |
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| 84 | } |
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| 85 | |
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| 86 | bool GeometryUtils::isPointStrictlyInsidePart(const Pt3D &point, const Part *part) |
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| 87 | { |
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| 88 | switch (part->shape) |
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| 89 | { |
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| 90 | case Part::SHAPE_ELLIPSOID: |
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| 91 | return isPointStrictlyInsideEllipsoid(point, part); |
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| 92 | break; |
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| 93 | |
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| 94 | case Part::SHAPE_CUBOID: |
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| 95 | return isPointStrictlyInsideCuboid(point, part); |
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| 96 | break; |
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| 97 | |
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| 98 | case Part::SHAPE_CYLINDER: |
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| 99 | return isPointStrictlyInsideCylinder(point, part); |
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| 100 | break; |
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| 101 | } |
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| 102 | } |
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| 103 | |
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| 104 | bool GeometryUtils::isPointInsideEllipsoid(const Pt3D &point, const Part *part) |
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| 105 | { |
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| 106 | Pt3D moved = point - part->p; |
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| 107 | Pt3D rotated; |
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| 108 | part->o.revTransform(rotated, moved); |
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| 109 | |
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| 110 | double r |
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| 111 | = (pow(rotated.x, 2.0) / pow(part->scale.x, 2.0)) |
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| 112 | + (pow(rotated.y, 2.0) / pow(part->scale.y, 2.0)) |
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| 113 | + (pow(rotated.z, 2.0) / pow(part->scale.z, 2.0)); |
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| 114 | |
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| 115 | return r <= 1.0; |
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| 116 | } |
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| 117 | |
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| 118 | bool GeometryUtils::isPointStrictlyInsideEllipsoid(const Pt3D &point, const Part *part) |
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| 119 | { |
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| 120 | Pt3D moved = point - part->p; |
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| 121 | Pt3D rotated; |
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| 122 | part->o.revTransform(rotated, moved); |
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| 123 | |
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| 124 | double r |
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| 125 | = (pow(rotated.x, 2.0) / pow(part->scale.x, 2.0)) |
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| 126 | + (pow(rotated.y, 2.0) / pow(part->scale.y, 2.0)) |
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| 127 | + (pow(rotated.z, 2.0) / pow(part->scale.z, 2.0)); |
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| 128 | |
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| 129 | return r < 1.0; |
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| 130 | } |
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| 131 | |
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| 132 | bool GeometryUtils::isPointInsideCuboid(const Pt3D &point, const Part *part) |
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| 133 | { |
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| 134 | Pt3D moved = point - part->p; |
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| 135 | Pt3D rotated; |
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| 136 | part->o.revTransform(rotated, moved); |
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| 137 | |
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| 138 | return (fabs(rotated.x) <= part->scale.x) |
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| 139 | && (fabs(rotated.y) <= part->scale.y) |
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| 140 | && (fabs(rotated.z) <= part->scale.z); |
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| 141 | } |
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| 142 | |
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| 143 | bool GeometryUtils::isPointStrictlyInsideCuboid(const Pt3D &point, const Part *part) |
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| 144 | { |
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| 145 | Pt3D moved = point - part->p; |
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| 146 | Pt3D rotated; |
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| 147 | part->o.revTransform(rotated, moved); |
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| 148 | |
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| 149 | return (fabs(rotated.x) < part->scale.x) |
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| 150 | && (fabs(rotated.y) < part->scale.y) |
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| 151 | && (fabs(rotated.z) < part->scale.z); |
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| 152 | } |
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| 153 | |
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| 154 | bool GeometryUtils::isPointInsideCylinder(const Pt3D &point, const Part *part) |
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| 155 | { |
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| 156 | Pt3D moved = point - part->p; |
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| 157 | Pt3D rotated; |
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| 158 | part->o.revTransform(rotated, moved); |
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| 159 | |
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| 160 | double r |
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| 161 | = (pow(rotated.y, 2.0) / pow(part->scale.y, 2.0)) |
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| 162 | + (pow(rotated.z, 2.0) / pow(part->scale.z, 2.0)); |
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| 163 | |
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| 164 | return (fabs(rotated.x) <= part->scale.x) && (r <= 1.0); |
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| 165 | } |
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| 166 | |
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| 167 | bool GeometryUtils::isPointStrictlyInsideCylinder(const Pt3D &point, const Part *part) |
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| 168 | { |
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| 169 | Pt3D moved = point - part->p; |
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| 170 | Pt3D rotated; |
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| 171 | part->o.revTransform(rotated, moved); |
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| 172 | |
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| 173 | double r |
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| 174 | = (pow(rotated.y, 2.0) / pow(part->scale.y, 2.0)) |
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| 175 | + (pow(rotated.z, 2.0) / pow(part->scale.z, 2.0)); |
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| 176 | |
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| 177 | return (fabs(rotated.x) < part->scale.x) && (r < 1.0); |
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| 178 | } |
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| 179 | |
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| 180 | void GeometryUtils::findSizesAndAxesOfPointsGroup(SListTempl<Pt3D> &points, Pt3D &sizes, |
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| 181 | Orient &axes) |
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| 182 | { |
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| 183 | findSizeAndAxisOfPointsGroup(points, sizes.x, axes.x); |
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| 184 | orthographicProjectionToPlane(points, axes.x); |
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| 185 | findSizeAndAxisOfPointsGroup(points, sizes.y, axes.y); |
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| 186 | orthographicProjectionToPlane(points, axes.y); |
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| 187 | |
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| 188 | Pt3D min(points.get(0)), max(points.get(0)); |
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| 189 | |
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| 190 | for (int i = 1; i < points.size(); i++) |
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| 191 | { |
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| 192 | min.getMin(points.get(i)); |
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| 193 | max.getMax(points.get(i)); |
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| 194 | } |
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| 195 | |
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| 196 | sizes.z = min.distanceTo(max); |
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| 197 | axes.z.vectorProduct(axes.x, axes.y); |
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| 198 | } |
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| 199 | |
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| 200 | void GeometryUtils::findSizeAndAxisOfPointsGroup(const SListTempl<Pt3D> &points, double &size, |
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| 201 | Pt3D &axis) |
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| 202 | { |
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| 203 | int index1, index2; |
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| 204 | size = findTwoFurthestPoints(points, index1, index2); |
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| 205 | createAxisFromTwoPoints(axis, points.get(index1), points.get(index2)); |
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| 206 | } |
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| 207 | |
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| 208 | double GeometryUtils::findTwoFurthestPoints(const SListTempl<Pt3D> &points, int &index1, |
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| 209 | int &index2) |
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| 210 | { |
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| 211 | double distance = 0; |
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| 212 | index1 = index2 = 0; |
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| 213 | |
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| 214 | for (int i = 0; i < points.size()-1; i++) |
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| 215 | { |
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| 216 | Pt3D p1 = points.get(i); |
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| 217 | |
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| 218 | for (int j = i+1; j < points.size(); j++) |
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| 219 | { |
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| 220 | Pt3D p2 = points.get(j); |
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| 221 | double d = p1.distanceTo(p2); |
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| 222 | |
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| 223 | if (d > distance) |
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| 224 | { |
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| 225 | distance = d; |
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| 226 | index1 = i; |
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| 227 | index2 = j; |
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| 228 | } |
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| 229 | } |
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| 230 | } |
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| 231 | |
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| 232 | return distance; |
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| 233 | } |
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| 234 | |
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| 235 | void GeometryUtils::createAxisFromTwoPoints(Pt3D &axis, const Pt3D &point1, const Pt3D &point2) |
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| 236 | { |
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| 237 | Pt3D vector = point2 - point1; |
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| 238 | vector.normalize(); |
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| 239 | |
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| 240 | axis.x = vector.x; |
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| 241 | axis.y = vector.y; |
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| 242 | axis.z = vector.z; |
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| 243 | } |
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| 244 | |
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| 245 | void GeometryUtils::orthographicProjectionToPlane(SListTempl<Pt3D> &points, |
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| 246 | const Pt3D &planeNormalVector) |
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| 247 | { |
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| 248 | for (int i = 0; i < points.size(); i++) |
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| 249 | { |
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| 250 | Pt3D &point = points.get(i); |
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| 251 | |
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| 252 | double distance = pointDistanceToPlane(point, planeNormalVector); |
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| 253 | |
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| 254 | point.x -= planeNormalVector.x * distance; |
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| 255 | point.y -= planeNormalVector.y * distance; |
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| 256 | point.z -= planeNormalVector.z * distance; |
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| 257 | } |
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| 258 | } |
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| 259 | |
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| 260 | double GeometryUtils::pointDistanceToPlane(const Pt3D &point, const Pt3D &planeNormalVector) |
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| 261 | { |
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| 262 | return planeNormalVector.x*point.x + planeNormalVector.y*point.y + planeNormalVector.z*point.z; |
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| 263 | } |
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| 264 | |
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| 265 | void GeometryUtils::getRectangleApicesFromCuboid(const Part *part, const CuboidFaces::Face face, Pt3D &apex1, Pt3D &apex2, Pt3D &apex3, Pt3D &apex4) |
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| 266 | { |
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| 267 | Pt3D temp1(part->scale), temp2(part->scale), temp3(part->scale), temp4(part->scale); |
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| 268 | |
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| 269 | if (CuboidFaces::isX(face)) |
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| 270 | { |
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| 271 | temp2.z *= -1; |
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| 272 | temp3.y *= -1; |
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| 273 | temp4.z *= -1; |
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| 274 | temp4.y *= -1; |
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| 275 | } |
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| 276 | else if (CuboidFaces::isY(face)) |
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| 277 | { |
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| 278 | temp2.x *= -1; |
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| 279 | temp3.z *= -1; |
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| 280 | temp4.x *= -1; |
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| 281 | temp4.z *= -1; |
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| 282 | } |
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| 283 | else if (CuboidFaces::isZ(face)) |
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| 284 | { |
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| 285 | temp2.y *= -1; |
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| 286 | temp3.x *= -1; |
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| 287 | temp4.y *= -1; |
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| 288 | temp4.x *= -1; |
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| 289 | } |
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| 290 | |
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| 291 | if (CuboidFaces::isNegative(face)) |
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| 292 | { |
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| 293 | temp1 *= -1; |
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| 294 | temp2 *= -1; |
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| 295 | temp3 *= -1; |
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| 296 | temp4 *= -1; |
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| 297 | } |
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| 298 | |
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| 299 | part->o.transform(apex1, temp1); |
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| 300 | part->o.transform(apex2, temp2); |
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| 301 | part->o.transform(apex3, temp3); |
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| 302 | part->o.transform(apex4, temp4); |
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| 303 | |
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| 304 | apex1 += part->p; |
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| 305 | apex2 += part->p; |
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| 306 | apex3 += part->p; |
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| 307 | apex4 += part->p; |
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| 308 | } |
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| 309 | |
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| 310 | void GeometryUtils::getRectangleApices(const double width, const double height, const Pt3D &position, const Orient &orient, Pt3D &apex1, Pt3D &apex2, Pt3D &apex3, Pt3D &apex4) |
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| 311 | { |
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| 312 | Pt3D temp1(0.0, +width, +height); |
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| 313 | Pt3D temp2(0.0, +width, -height); |
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| 314 | Pt3D temp3(0.0, -width, +height); |
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| 315 | Pt3D temp4(0.0, -width, -height); |
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| 316 | |
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| 317 | orient.transform(apex1, temp1); |
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| 318 | orient.transform(apex2, temp2); |
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| 319 | orient.transform(apex3, temp3); |
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| 320 | orient.transform(apex4, temp4); |
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| 321 | |
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| 322 | apex1 += position; |
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| 323 | apex2 += position; |
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| 324 | apex3 += position; |
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| 325 | apex4 += position; |
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| 326 | } |
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| 327 | |
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| 328 | void GeometryUtils::getNextEllipseSegmentationPoint(const double d, const double a, const double b, double &x, double &y) |
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| 329 | { |
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| 330 | x += d / sqrt(1.0 + (b*b * x*x) / (a*a * (a*a - x*x))); |
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| 331 | y = b * sqrt(1.0 - (x*x) / (a*a)); |
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| 332 | } |
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| 333 | |
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| 334 | double GeometryUtils::ellipsoidArea(const Pt3D &sizes) |
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| 335 | { |
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| 336 | return ellipsoidArea(sizes.x, sizes.y, sizes.z); |
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| 337 | } |
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| 338 | |
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| 339 | double GeometryUtils::ellipsoidArea(const double a, const double b, const double c) |
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| 340 | { |
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| 341 | double p = 1.6075; |
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| 342 | double ap = pow(a, p); |
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| 343 | double bp = pow(b, p); |
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| 344 | double cp = pow(c, p); |
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| 345 | return 4*M_PI * pow((ap*bp + bp*cp + cp*ap) / 3.0, 1.0 / p); |
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| 346 | } |
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| 347 | |
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| 348 | double GeometryUtils::ellipsePerimeter(const double a, const double b) |
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| 349 | { |
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| 350 | return M_PI * ((3 * (a+b)) - sqrt((3*a + b) * (a + 3*b))); |
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| 351 | } |
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