comparison: src/mathfunctions.cpp
src/mathfunctions.cpp
- changeset 1025
- 4949da3fb4b3
- parent 1024
- 67ba0ee049eb
- child 1035
- 8a60250175ba
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| 1024:67ba0ee049eb | 1025:4949da3fb4b3 |
|---|---|
| 1 /* | |
| 2 * LDForge: LDraw parts authoring CAD | |
| 3 * Copyright (C) 2013 - 2016 Teemu Piippo | |
| 4 * | |
| 5 * This program is free software: you can redistribute it and/or modify | |
| 6 * it under the terms of the GNU General Public License as published by | |
| 7 * the Free Software Foundation, either version 3 of the License, or | |
| 8 * (at your option) any later version. | |
| 9 * | |
| 10 * This program is distributed in the hope that it will be useful, | |
| 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 * GNU General Public License for more details. | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License | |
| 16 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 17 */ | |
| 18 | |
| 19 #include "mathfunctions.h" | |
| 20 #include "ldObject.h" | |
| 21 #include "miscallenous.h" | |
| 22 | |
| 23 | |
| 24 MathFunctions::MathFunctions(QObject* parent) : | |
| 25 HierarchyElement(parent) {} | |
| 26 | |
| 27 | |
| 28 void MathFunctions::rotateVertex(Vertex& vertex, const Vertex& rotationPoint, const Matrix& transformationMatrix) const | |
| 29 { | |
| 30 vertex -= rotationPoint; | |
| 31 vertex.transform (transformationMatrix, Origin); | |
| 32 vertex += rotationPoint; | |
| 33 } | |
| 34 | |
| 35 | |
| 36 void MathFunctions::rotateObjects(int l, int m, int n, double angle, const LDObjectList& objects) const | |
| 37 { | |
| 38 Vertex rotationPoint = getRotationPoint (objects); | |
| 39 double cosAngle = cos(angle); | |
| 40 double sinAngle = sin(angle); | |
| 41 | |
| 42 // ref: http://en.wikipedia.org/wiki/Transformation_matrix#Rotation_2 | |
| 43 Matrix transformationMatrix ( | |
| 44 { | |
| 45 (l * l * (1 - cosAngle)) + cosAngle, | |
| 46 (m * l * (1 - cosAngle)) - (n * sinAngle), | |
| 47 (n * l * (1 - cosAngle)) + (m * sinAngle), | |
| 48 | |
| 49 (l * m * (1 - cosAngle)) + (n * sinAngle), | |
| 50 (m * m * (1 - cosAngle)) + cosAngle, | |
| 51 (n * m * (1 - cosAngle)) - (l * sinAngle), | |
| 52 | |
| 53 (l * n * (1 - cosAngle)) - (m * sinAngle), | |
| 54 (m * n * (1 - cosAngle)) + (l * sinAngle), | |
| 55 (n * n * (1 - cosAngle)) + cosAngle | |
| 56 }); | |
| 57 | |
| 58 // Apply the above matrix to everything | |
| 59 for (LDObject* obj : objects) | |
| 60 { | |
| 61 if (obj->numVertices()) | |
| 62 { | |
| 63 for (int i = 0; i < obj->numVertices(); ++i) | |
| 64 { | |
| 65 Vertex v = obj->vertex (i); | |
| 66 rotateVertex(v, rotationPoint, transformationMatrix); | |
| 67 obj->setVertex (i, v); | |
| 68 } | |
| 69 } | |
| 70 else if (obj->hasMatrix()) | |
| 71 { | |
| 72 LDMatrixObject* mo = dynamic_cast<LDMatrixObject*> (obj); | |
| 73 | |
| 74 // Transform the position | |
| 75 Vertex v = mo->position(); | |
| 76 rotateVertex(v, rotationPoint, transformationMatrix); | |
| 77 mo->setPosition (v); | |
| 78 | |
| 79 // Transform the matrix | |
| 80 mo->setTransform(transformationMatrix * mo->transform()); | |
| 81 } | |
| 82 } | |
| 83 } | |
| 84 | |
| 85 | |
| 86 Vertex MathFunctions::getRotationPoint(const LDObjectList& objs) const | |
| 87 { | |
| 88 switch (RotationPoint (m_config->rotationPointType())) | |
| 89 { | |
| 90 case RotationPoint::ObjectOrigin: | |
| 91 { | |
| 92 BoundingBox box; | |
| 93 | |
| 94 // Calculate center vertex | |
| 95 for (LDObject* obj : objs) | |
| 96 { | |
| 97 if (obj->hasMatrix()) | |
| 98 box << static_cast<LDMatrixObject*> (obj)->position(); | |
| 99 else | |
| 100 box << obj; | |
| 101 } | |
| 102 | |
| 103 return box.center(); | |
| 104 } | |
| 105 | |
| 106 case RotationPoint::WorldOrigin: | |
| 107 return Vertex(); | |
| 108 | |
| 109 case RotationPoint::CustomPoint: | |
| 110 return m_config->customRotationPoint(); | |
| 111 | |
| 112 case RotationPoint::NumValues: | |
| 113 break; | |
| 114 } | |
| 115 | |
| 116 return Vertex(); | |
| 117 } |
