src/polygoncache.cpp

Tue, 28 Jun 2022 17:59:34 +0300

author
Teemu Piippo <teemu.s.piippo@gmail.com>
date
Tue, 28 Jun 2022 17:59:34 +0300
changeset 291
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parent 264
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child 305
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permissions
-rw-r--r--

Let's bring GLEW back after all

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1 #include "src/circularprimitive.h"
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2 #include "src/documentmanager.h"
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3 #include "src/invert.h"
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4 #include "src/polygoncache.h"
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5
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6 Model* resolve(const QString& name, const ModelId callingModelId, DocumentManager* documents)
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7 {
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8 return documents->findDependencyByName(callingModelId, name);
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9 }
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10
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11 static PolygonElement transformed(
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12 PolygonElement element,
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13 const glm::mat4& transform)
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14 {
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15 visitPoints([&transform](glm::vec3& p) {
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16 p = transform * glm::vec4{p, 1};
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17 }, element);
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18 return element;
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19 }
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20
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21 PolygonCache* findPolygonCacheForModel(Model* model, DocumentManager* context)
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22 {
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23 std::optional<ModelId> modelId = context->findIdForModel(model);
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24 if (modelId.has_value()) {
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25 return context->getPolygonCacheForModel(modelId.value());
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26 }
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27 else {
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28 return nullptr;
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29 }
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30 }
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31
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32 static std::vector<WithId<PolygonElement>> getPolygonsAt(
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33 const Model* model,
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34 GetPolygonsContext* context)
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35 {
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36 std::vector<WithId<PolygonElement>> result;
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37 for (std::size_t i = 0; i < model->size(); i += 1)
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38 {
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39 const ModelElement& element = (*model)[i];
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40 const ModelId id = model->idAt(i);
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41 std::visit<void>(overloaded{
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42 [&](const Colored<LineSegment>& edge) {
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43 result.push_back({{edge, edge.color}, id});
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44 },
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45 [&](const Colored<Triangle>& triangle) {
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46 result.push_back({{triangle, triangle.color}, id});
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47 },
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48 [&](const Colored<Quadrilateral>& quad) {
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49 result.push_back({{quad, quad.color}, id});
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50 },
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51 [&](const Colored<ConditionalEdge>& cedge) {
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52 result.push_back({{cedge, cedge.color}, id});
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53 },
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54 [&result, &id, context](const Colored<SubfileReference>& ref) {
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55 Model* dependency = context->documents->findDependencyByName(context->modelId, ref.name);
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56 PolygonCache* cache = nullptr;
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57 if (dependency != nullptr) {
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58 cache = findPolygonCacheForModel(dependency, context->documents);
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59 }
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60 if (cache != nullptr) {
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61 const bool needInverting = glm::determinant(ref.transformation) < 0;
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62 const PolygonCache::vector_type* modelPolygons = getCachedPolygons(
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63 cache,
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64 dependency,
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65 context->documents);
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66 reserveMore(result, modelPolygons->size());
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67 for (WithId<PolygonElement> polygon : *modelPolygons) {
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68 polygon = {transformed(polygon, ref.transformation), polygon.id};
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69 if (needInverting != ref.inverted) {
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70 gl::invert(polygon);
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71 }
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72 if (polygon.color == MAIN_COLOR) {
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73 polygon.color = ref.color;
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74 }
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75 polygon.id = id;
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76 result.push_back(polygon);
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77 }
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78 }
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79 },
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80 [&result, id](const Colored<CircularPrimitive>& circ) {
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81 rasterize(circ, [&](const ModelElement& element){
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82 std::visit<void>(overloaded{
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83 // TODO: :-(
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84 [&](const Colored<LineSegment>& edge) {
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85 result.push_back({{edge, edge.color}, id});
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86 },
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87 [&](const Colored<Triangle>& triangle) {
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88 result.push_back({{triangle, triangle.color}, id});
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89 },
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90 [&](const Colored<Quadrilateral>& quad) {
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91 result.push_back({{quad, quad.color}, id});
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92 },
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93 [&](const Colored<ConditionalEdge>& cedge) {
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94 result.push_back({{cedge, cedge.color}, id});
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95 },
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96 [&](const auto&){},
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97 }, element);
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98 });
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99 },
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100 [](const ModelElement&) {}
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101 }, element);
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102 }
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103 return result;
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104 }
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105
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106 /**
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107 * @brief Gets a list of GL polygons that are used to represent this model.
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108 * @details Will build polygons if polygons are outdated.
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109 * @param documents Documents to use to resolve subfile references
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110 * @return vector of GL polygons
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111 */
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112 const PolygonCache::vector_type* getCachedPolygons(
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113 PolygonCache *cache,
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114 Model *model,
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115 DocumentManager *documents)
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116 {
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117 if (cache->needRecache)
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118 {
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119 cache->cachedPolygons.clear();
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120 const std::optional<ModelId> modelId = documents->findIdForModel(model);
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121 if (modelId.has_value())
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122 {
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123 GetPolygonsContext context{modelId.value(), documents};
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124 cache->cachedPolygons = getPolygonsAt(model, &context);
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125 }
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126 cache->needRecache = false;
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127 }
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128 return &cache->cachedPolygons;
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129 }

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