comparison: src/invert.cpp
src/invert.cpp
- changeset 19
- ed9685f44ab3
- child 21
- 0133e565e072
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| 18:918b6c0f8b5b | 19:ed9685f44ab3 |
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| 1 /* | |
| 2 * LDForge: LDraw parts authoring CAD | |
| 3 * Copyright (C) 2013 - 2018 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 "main.h" | |
| 20 #include "model.h" | |
| 21 #include "matrix.h" | |
| 22 #include "gl/common.h" | |
| 23 | |
| 24 #if 0 | |
| 25 /* | |
| 26 * Returns whether or not the document is flat. | |
| 27 * If it is flat, the result is stored in *axis. | |
| 28 */ | |
| 29 bool isflat(Model* model, Axis* flatDimension) | |
| 30 { | |
| 31 // The dimensions that this model is potentially flat in. | |
| 32 QVector<Axis> dimensions = {X, Y, Z}; | |
| 33 | |
| 34 // Iterate through everything in the subfile. If there is any vertex with a coordinate not at | |
| 35 // zero, the subfile is not flat in that dimension. | |
| 36 for (LDObject* subfileObject : model->objects()) | |
| 37 { | |
| 38 for (int i = 0; i < subfileObject->numVertices(); ++i) | |
| 39 { | |
| 40 Vertex const& v_i = subfileObject->vertex(i); | |
| 41 | |
| 42 if (not qFuzzyCompare(v_i.x, 0.0)) | |
| 43 dimensions.removeOne(X); | |
| 44 | |
| 45 if (not qFuzzyCompare(v_i.y, 0.0)) | |
| 46 dimensions.removeOne(Y); | |
| 47 | |
| 48 if (not qFuzzyCompare(v_i.z, 0.0)) | |
| 49 dimensions.removeOne(Z); | |
| 50 } | |
| 51 | |
| 52 // If there are no more dimensions left, we can exit the loop. | |
| 53 if (dimensions.isEmpty()) | |
| 54 break; | |
| 55 } | |
| 56 | |
| 57 if (dimensions.size() == 1) | |
| 58 { | |
| 59 // The model is flat in one dimension, return that. | |
| 60 // If the model is flat in two or three dimensions, it's not really a valid model. | |
| 61 *flatDimension = dimensions[0]; | |
| 62 return true; | |
| 63 } | |
| 64 else | |
| 65 { | |
| 66 // The model is not flat. | |
| 67 return false; | |
| 68 } | |
| 69 } | |
| 70 #endif | |
| 71 | |
| 72 /* | |
| 73 * Returns a matrix that causes a flip on the given dimension. | |
| 74 */ | |
| 75 Matrix4x4 flipmatrix(Axis dimension) | |
| 76 { | |
| 77 Matrix4x4 result = identity4x4; | |
| 78 switch (dimension) | |
| 79 { | |
| 80 case X: | |
| 81 result(0, 0) = -1; | |
| 82 break; | |
| 83 case Y: | |
| 84 result(1, 1) = -1; | |
| 85 break; | |
| 86 case Z: | |
| 87 result(2, 2) = -1; | |
| 88 break; | |
| 89 } | |
| 90 return result; | |
| 91 } | |
| 92 | |
| 93 #if 0 | |
| 94 /* | |
| 95 * Inverts an LDObject so that its winding is changed. | |
| 96 */ | |
| 97 void invert(LDObject* obj, DocumentManager* context) | |
| 98 { | |
| 99 if (obj->numPolygonVertices() > 0) | |
| 100 { | |
| 101 // Object is vertex based, so change the order of the vertices. | |
| 102 QVector<Vertex> vertices; | |
| 103 vertices.resize(obj->numPolygonVertices()); | |
| 104 | |
| 105 for (int i = 0; i < vertices.size(); i += 1) | |
| 106 vertices[vertices.size() - 1 - i] = obj->vertex(i); | |
| 107 | |
| 108 for (int i = 0; i < vertices.size(); i += 1) | |
| 109 obj->setVertex(i, vertices[i]); | |
| 110 } | |
| 111 else if (obj->type() == LDObjectType::SubfileReference) | |
| 112 { | |
| 113 // Check whether subfile is flat. If it is, flip it on the axis on which it is flat. | |
| 114 Model model {context}; | |
| 115 LDSubfileReference* reference = static_cast<LDSubfileReference*>(obj); | |
| 116 reference->fileInfo(context)->inlineContents(model, true, false); | |
| 117 Axis flatDimension; | |
| 118 | |
| 119 if (::isflat(&model, &flatDimension)) | |
| 120 { | |
| 121 reference->setTransformationMatrix( | |
| 122 reference->transformationMatrix() * ::flipmatrix(flatDimension) | |
| 123 ); | |
| 124 } | |
| 125 else | |
| 126 { | |
| 127 // Subfile is not flat. Resort to invertnext. | |
| 128 reference->setInverted(not reference->isInverted()); | |
| 129 } | |
| 130 } | |
| 131 else if (obj->type() == LDObjectType::CircularPrimitive) | |
| 132 { | |
| 133 auto primitive = static_cast<LDCircularPrimitive*>(obj); | |
| 134 | |
| 135 if (primitive->isFlat()) | |
| 136 primitive->setTransformationMatrix(primitive->transformationMatrix() * ::flipmatrix(Y)); | |
| 137 else | |
| 138 primitive->setInverted(not primitive->isInverted()); | |
| 139 } | |
| 140 } | |
| 141 #endif | |
| 142 | |
| 143 /* | |
| 144 * Inverts the winding of a polygon. | |
| 145 */ | |
| 146 void invertPolygon(gl::Polygon& polygon) | |
| 147 { | |
| 148 switch (polygon.numPolygonVertices()) | |
| 149 { | |
| 150 case 2: | |
| 151 case 3: | |
| 152 std::swap(polygon.vertices[0], polygon.vertices[1]); | |
| 153 break; | |
| 154 | |
| 155 case 4: | |
| 156 std::swap(polygon.vertices[1], polygon.vertices[3]); | |
| 157 break; | |
| 158 } | |
| 159 } |
