src/document.cpp

Wed, 15 Jun 2022 12:32:50 +0300

author
Teemu Piippo <teemu.s.piippo@gmail.com>
date
Wed, 15 Jun 2022 12:32:50 +0300
changeset 225
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parent 223
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child 226
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permissions
-rw-r--r--

Fix crash involving polygon being too empty

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1 /*
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2 * LDForge: LDraw parts authoring CAD
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3 * Copyright (C) 2013 - 2020 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 <QMouseEvent>
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20 #include <QPainter>
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21 #include "algorithm/earcut.h"
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22 #include "document.h"
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23 #include "model.h"
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24 #include "ui/objecteditor.h"
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25 #include "gl/partrenderer.h"
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26
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27 // Make mapbox::earcut work with glm::vec3
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28 namespace mapbox {
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29 namespace util {
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30 template<> struct nth<0, glm::vec3>
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31 {
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32 static constexpr float get(const glm::vec3& t) { return t.x; };
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33 };
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34 template<> struct nth<1, glm::vec3>
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35 {
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36 static constexpr float get(const glm::vec3& t) { return t.y; };
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37 };
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38 }
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39 }
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40
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41 EditTools::EditTools(QObject* parent) :
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42 QObject{parent},
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43 RenderLayer{}
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44 {
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45 }
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46
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47 EditTools::~EditTools()
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48 {
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49 }
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50
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51 void EditTools::setEditMode(EditingMode mode)
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52 {
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53 this->mode = mode;
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54 }
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55
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56 void EditTools::setGridMatrix(const glm::mat4& gridMatrix)
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57 {
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58 this->gridMatrix = gridMatrix;
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59 this->gridPlane = planeFromTriangle({
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60 this->gridMatrix * glm::vec4{0, 0, 0, 1},
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61 this->gridMatrix * glm::vec4{1, 0, 0, 1},
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62 this->gridMatrix * glm::vec4{0, 1, 0, 1},
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63 });
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64 }
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65
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66 void EditTools::mvpMatrixChanged(const glm::mat4& matrix)
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67 {
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68 this->mvpMatrix = matrix;
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69 }
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70
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71 void EditTools::mouseMoved(const QMouseEvent* event)
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72 {
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73 this->worldPosition = this->renderer->screenToModelCoordinates(event->pos(), this->gridPlane);
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74 if (this->worldPosition.has_value())
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75 {
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76 // Snap the position to grid. This procedure is basically the "change of basis" and almost follows the
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77 // A⁻¹ × M × A formula which is used to perform a transformation in some other coordinate system, except
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78 // we actually use the inverted matrix first and the regular one last to perform the transformation of
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79 // grid coordinates in our XY coordinate system. Also, we're rounding the coordinates which is obviously
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80 // not a linear transformation, but fits the pattern anyway.
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81 // First transform the coordinates to the XY plane...
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82 this->worldPosition = glm::inverse(this->gridMatrix) * glm::vec4{*this->worldPosition, 1};
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83 // Then round the coordinates to integer precision...
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84 this->worldPosition = glm::round(*this->worldPosition);
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85 // And finally transform it back to grid coordinates by transforming it with the
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86 // grid matrix.
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87 this->worldPosition = this->gridMatrix * glm::vec4{*this->worldPosition, 1};
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88 this->polygon.back() = *this->worldPosition;
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89 }
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90 this->numpoints = this->polygon.size();
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91 if (this->isCloseToExistingPoints()) {
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92 this->numpoints -= 1;
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93 }
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94 }
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95
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96 static QVector<QPointF> convertWorldPointsToScreenPoints(
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97 const std::vector<glm::vec3> &worldPoints,
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98 const PartRenderer* renderer)
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99 {
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100 QVector<QPointF> points2d;
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101 points2d.reserve(worldPoints.size());
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102 for (const glm::vec3& point : worldPoints)
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103 {
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104 points2d.push_back(renderer->modelToScreenCoordinates(point));
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105 }
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106 return points2d;
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107 }
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108
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109 static Winding worldPolygonWinding(
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110 const std::vector<glm::vec3> &points,
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111 const PartRenderer* renderer)
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112 {
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113 return winding(QPolygonF{convertWorldPointsToScreenPoints(points, renderer)});
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114 }
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115
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116 static void drawWorldPoint(
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117 QPainter* painter,
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118 const glm::vec3& worldPoint,
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119 const PartRenderer* renderer)
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120 {
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121 const QPointF center = renderer->modelToScreenCoordinates(worldPoint);
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122 painter->drawEllipse(inscribe(CircleF{center, 5}));
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123 }
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124
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125 static void drawWorldPolyline(
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126 QPainter *painter,
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127 const std::vector<glm::vec3> &points,
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128 const PartRenderer* renderer)
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129 {
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130 painter->drawPolyline(QPolygonF{convertWorldPointsToScreenPoints(points, renderer)});
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131 }
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132
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diff changeset
133 static void drawWorldPolygon(
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diff changeset
134 QPainter* painter,
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diff changeset
135 const std::vector<glm::vec3> &points,
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diff changeset
136 const PartRenderer* renderer)
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diff changeset
137 {
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diff changeset
138 painter->drawPolygon(QPolygonF{convertWorldPointsToScreenPoints(points, renderer)});
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diff changeset
139 }
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diff changeset
140
222
72b456f2f3c2 Edit tools: get rid of the preview polygon and render the result-to-be
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diff changeset
141 static opt<std::vector<glm::vec3>> modelActionPoints(const ModelAction& action)
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diff changeset
142 {
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diff changeset
143 opt<std::vector<glm::vec3>> result;
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diff changeset
144 if (const AppendToModel* append = std::get_if<AppendToModel>(&action)) {
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diff changeset
145 const ModelElement& newElement = append->newElement;
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diff changeset
146 if (const LineSegment* seg = std::get_if<Colored<LineSegment>>(&newElement)) {
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parents: 217
diff changeset
147 result = {seg->p1, seg->p2};
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diff changeset
148 }
72b456f2f3c2 Edit tools: get rid of the preview polygon and render the result-to-be
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diff changeset
149 else if (const Triangle* tri = std::get_if<Colored<Triangle>>(&newElement)) {
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parents: 217
diff changeset
150 result = {tri->p1, tri->p2, tri->p3};
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diff changeset
151 }
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diff changeset
152 else if (const Quadrilateral* quad = std::get_if<Colored<Quadrilateral>>(&newElement)) {
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diff changeset
153 result = {quad->p1, quad->p2, quad->p3, quad->p4};
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diff changeset
154 }
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Teemu Piippo <teemu.s.piippo@gmail.com>
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diff changeset
155 }
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diff changeset
156 return result;
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diff changeset
157 }
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diff changeset
158
217
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diff changeset
159 void EditTools::overpaint(QPainter* painter)
197
0e729e681a2c move drawState to Document
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diff changeset
160 {
217
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diff changeset
161 struct Pens
197
0e729e681a2c move drawState to Document
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diff changeset
162 {
217
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diff changeset
163 const QBrush pointBrush;
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164 const QPen pointPen;
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165 const QPen polygonPen;
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166 const QPen badPolygonPen;
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167 const QBrush greenPolygonBrush;
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168 const QBrush redPolygonBrush;
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diff changeset
169 };
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diff changeset
170 static const Pens brightPens{
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diff changeset
171 .pointBrush = {Qt::white},
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diff changeset
172 .pointPen = {QBrush{Qt::black}, 2.0},
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diff changeset
173 .polygonPen = {QBrush{Qt::black}, 2.0, Qt::DashLine},
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diff changeset
174 .greenPolygonBrush = {QColor{64, 255, 128, 192}},
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diff changeset
175 .redPolygonBrush = {QColor{255, 96, 96, 192}},
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diff changeset
176 };
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diff changeset
177 static const Pens darkPens{
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diff changeset
178 .pointBrush = {Qt::black},
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diff changeset
179 .pointPen = {QBrush{Qt::white}, 2.0},
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parents: 214
diff changeset
180 .polygonPen = {QBrush{Qt::white}, 2.0, Qt::DashLine},
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diff changeset
181 .greenPolygonBrush = {QColor{64, 255, 128, 192}},
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diff changeset
182 .redPolygonBrush = {QColor{255, 96, 96, 192}},
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diff changeset
183 };
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diff changeset
184 const Pens& pens = (this->renderer->isDark() ? darkPens : brightPens);
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diff changeset
185 switch(this->mode) {
6d95c1a41e6e reimplement EditTools as a render layer
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parents: 214
diff changeset
186 case SelectMode:
6d95c1a41e6e reimplement EditTools as a render layer
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 214
diff changeset
187 break;
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parents: 214
diff changeset
188 case DrawMode:
223
ce81db996275 Use Mapbox's ear clipping algorithm to handle drawing any simple polygon
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parents: 222
diff changeset
189 painter->setPen(pens.polygonPen);
222
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parents: 217
diff changeset
190 for (const ModelAction& action : this->actions()) {
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parents: 217
diff changeset
191 const opt<std::vector<glm::vec3>> points = modelActionPoints(action);
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parents: 217
diff changeset
192 if (points.has_value()) {
72b456f2f3c2 Edit tools: get rid of the preview polygon and render the result-to-be
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 217
diff changeset
193 if (worldPolygonWinding(*points, this->renderer) == Winding::Clockwise) {
217
6d95c1a41e6e reimplement EditTools as a render layer
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 214
diff changeset
194 painter->setBrush(pens.greenPolygonBrush);
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parents: 214
diff changeset
195 }
6d95c1a41e6e reimplement EditTools as a render layer
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 214
diff changeset
196 else {
6d95c1a41e6e reimplement EditTools as a render layer
Teemu Piippo <teemu.s.piippo@gmail.com>
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diff changeset
197 painter->setBrush(pens.redPolygonBrush);
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parents: 214
diff changeset
198 }
222
72b456f2f3c2 Edit tools: get rid of the preview polygon and render the result-to-be
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parents: 217
diff changeset
199 drawWorldPolygon(painter, *points, this->renderer);
217
6d95c1a41e6e reimplement EditTools as a render layer
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 214
diff changeset
200 }
222
72b456f2f3c2 Edit tools: get rid of the preview polygon and render the result-to-be
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diff changeset
201 }
72b456f2f3c2 Edit tools: get rid of the preview polygon and render the result-to-be
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 217
diff changeset
202 //drawWorldPolyline(painter, this->previewPolygon, this->renderer);
72b456f2f3c2 Edit tools: get rid of the preview polygon and render the result-to-be
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parents: 217
diff changeset
203 painter->setBrush(pens.pointBrush);
72b456f2f3c2 Edit tools: get rid of the preview polygon and render the result-to-be
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parents: 217
diff changeset
204 painter->setPen(pens.pointPen);
72b456f2f3c2 Edit tools: get rid of the preview polygon and render the result-to-be
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 217
diff changeset
205 for (const glm::vec3& point : this->polygon) {
72b456f2f3c2 Edit tools: get rid of the preview polygon and render the result-to-be
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 217
diff changeset
206 drawWorldPoint(painter, point, this->renderer);
217
6d95c1a41e6e reimplement EditTools as a render layer
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 214
diff changeset
207 }
6d95c1a41e6e reimplement EditTools as a render layer
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 214
diff changeset
208 break;
6d95c1a41e6e reimplement EditTools as a render layer
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 214
diff changeset
209 }
6d95c1a41e6e reimplement EditTools as a render layer
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 214
diff changeset
210 if (this->worldPosition.has_value())
6d95c1a41e6e reimplement EditTools as a render layer
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 214
diff changeset
211 {
6d95c1a41e6e reimplement EditTools as a render layer
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 214
diff changeset
212 painter->setRenderHint(QPainter::Antialiasing);
6d95c1a41e6e reimplement EditTools as a render layer
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 214
diff changeset
213 painter->setPen(Qt::white);
6d95c1a41e6e reimplement EditTools as a render layer
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 214
diff changeset
214 painter->setBrush(Qt::green);
6d95c1a41e6e reimplement EditTools as a render layer
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 214
diff changeset
215 const QPointF pos = this->renderer->modelToScreenCoordinates(*this->worldPosition);
6d95c1a41e6e reimplement EditTools as a render layer
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parents: 214
diff changeset
216 painter->drawEllipse(pos, 5, 5);
6d95c1a41e6e reimplement EditTools as a render layer
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 214
diff changeset
217 painter->drawText(pos + QPointF{5, 5}, vectorToString(*this->worldPosition));
197
0e729e681a2c move drawState to Document
Teemu Piippo <teemu@hecknology.net>
parents: 191
diff changeset
218 }
0e729e681a2c move drawState to Document
Teemu Piippo <teemu@hecknology.net>
parents: 191
diff changeset
219 }
0e729e681a2c move drawState to Document
Teemu Piippo <teemu@hecknology.net>
parents: 191
diff changeset
220
217
6d95c1a41e6e reimplement EditTools as a render layer
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 214
diff changeset
221 void EditTools::removeLastPoint()
6d95c1a41e6e reimplement EditTools as a render layer
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 214
diff changeset
222 {
222
72b456f2f3c2 Edit tools: get rid of the preview polygon and render the result-to-be
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 217
diff changeset
223 if (this->polygon.size() > 1) {
217
6d95c1a41e6e reimplement EditTools as a render layer
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 214
diff changeset
224 this->polygon.erase(this->polygon.end() - 1);
197
0e729e681a2c move drawState to Document
Teemu Piippo <teemu@hecknology.net>
parents: 191
diff changeset
225 }
0e729e681a2c move drawState to Document
Teemu Piippo <teemu@hecknology.net>
parents: 191
diff changeset
226 }
0e729e681a2c move drawState to Document
Teemu Piippo <teemu@hecknology.net>
parents: 191
diff changeset
227
223
ce81db996275 Use Mapbox's ear clipping algorithm to handle drawing any simple polygon
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 222
diff changeset
228 bool EditTools::isCloseToExistingPoints() const
197
0e729e681a2c move drawState to Document
Teemu Piippo <teemu@hecknology.net>
parents: 191
diff changeset
229 {
223
ce81db996275 Use Mapbox's ear clipping algorithm to handle drawing any simple polygon
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 222
diff changeset
230 if (this->worldPosition.has_value()) {
ce81db996275 Use Mapbox's ear clipping algorithm to handle drawing any simple polygon
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 222
diff changeset
231 const glm::vec3& pos = *this->worldPosition;
ce81db996275 Use Mapbox's ear clipping algorithm to handle drawing any simple polygon
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parents: 222
diff changeset
232 return std::any_of(this->polygon.begin(), this->polygon.end() - 1, [&pos](const glm::vec3& p){
ce81db996275 Use Mapbox's ear clipping algorithm to handle drawing any simple polygon
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 222
diff changeset
233 return isclose(pos, p);
ce81db996275 Use Mapbox's ear clipping algorithm to handle drawing any simple polygon
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 222
diff changeset
234 });
ce81db996275 Use Mapbox's ear clipping algorithm to handle drawing any simple polygon
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 222
diff changeset
235 }
ce81db996275 Use Mapbox's ear clipping algorithm to handle drawing any simple polygon
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 222
diff changeset
236 else {
ce81db996275 Use Mapbox's ear clipping algorithm to handle drawing any simple polygon
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 222
diff changeset
237 return false;
ce81db996275 Use Mapbox's ear clipping algorithm to handle drawing any simple polygon
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 222
diff changeset
238 }
197
0e729e681a2c move drawState to Document
Teemu Piippo <teemu@hecknology.net>
parents: 191
diff changeset
239 }
0e729e681a2c move drawState to Document
Teemu Piippo <teemu@hecknology.net>
parents: 191
diff changeset
240
217
6d95c1a41e6e reimplement EditTools as a render layer
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 214
diff changeset
241 EditingMode EditTools::currentEditingMode() const
197
0e729e681a2c move drawState to Document
Teemu Piippo <teemu@hecknology.net>
parents: 191
diff changeset
242 {
217
6d95c1a41e6e reimplement EditTools as a render layer
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 214
diff changeset
243 return this->mode;
6d95c1a41e6e reimplement EditTools as a render layer
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 214
diff changeset
244 }
6d95c1a41e6e reimplement EditTools as a render layer
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 214
diff changeset
245
6d95c1a41e6e reimplement EditTools as a render layer
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 214
diff changeset
246 void EditTools::mouseClick(const QMouseEvent* event)
6d95c1a41e6e reimplement EditTools as a render layer
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 214
diff changeset
247 {
6d95c1a41e6e reimplement EditTools as a render layer
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 214
diff changeset
248 switch(this->mode) {
197
0e729e681a2c move drawState to Document
Teemu Piippo <teemu@hecknology.net>
parents: 191
diff changeset
249 case SelectMode:
217
6d95c1a41e6e reimplement EditTools as a render layer
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 214
diff changeset
250 if (event->button() == Qt::LeftButton) {
6d95c1a41e6e reimplement EditTools as a render layer
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 214
diff changeset
251 const ModelId highlighted = this->renderer->pick(event->pos());
6d95c1a41e6e reimplement EditTools as a render layer
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 214
diff changeset
252 Q_EMIT this->select({highlighted}, false);
197
0e729e681a2c move drawState to Document
Teemu Piippo <teemu@hecknology.net>
parents: 191
diff changeset
253 }
0e729e681a2c move drawState to Document
Teemu Piippo <teemu@hecknology.net>
parents: 191
diff changeset
254 break;
0e729e681a2c move drawState to Document
Teemu Piippo <teemu@hecknology.net>
parents: 191
diff changeset
255 case DrawMode:
217
6d95c1a41e6e reimplement EditTools as a render layer
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 214
diff changeset
256 if (event->button() == Qt::LeftButton and this->worldPosition.has_value()) {
223
ce81db996275 Use Mapbox's ear clipping algorithm to handle drawing any simple polygon
Teemu Piippo <teemu.s.piippo@gmail.com>
parents: 222
diff changeset
257 if (isCloseToExistingPoints()) {
197
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258 this->closeShape();
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259 }
214
8e1fe64ce4e3 begin refactor of gl side
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260 else {
217
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261 this->polygon.push_back(*this->worldPosition);
197
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262 }
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263 }
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264 else if (true
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265 and event->button() == Qt::RightButton
222
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266 and this->polygon.size() > 1
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267 ) {
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268 this->removeLastPoint();
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269 }
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270 break;
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271 }
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272 }
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273
223
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274 constexpr float distancesquared(const glm::vec3& p1, const glm::vec3& p2)
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275 {
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276 const float dx = p2.x - p1.x;
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277 const float dy = p2.y - p1.y;
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278 const float dz = p2.z - p1.z;
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279 return (dx * dx) + (dy * dy) + (dz * dz);
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280 }
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281
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282 inline float area(const Quadrilateral& q)
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283 {
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284 return 0.5 * (
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285 glm::length(glm::cross(q.p2 - q.p1, q.p3 - q.p1)) +
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286 glm::length(glm::cross(q.p3 - q.p2, q.p4 - q.p2))
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287 );
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288 }
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289
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290 inline float energy(const Quadrilateral& q)
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291 {
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292 const float L2 = distancesquared(q.p1, q.p2)
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293 + distancesquared(q.p2, q.p3)
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294 + distancesquared(q.p3, q.p4)
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295 + distancesquared(q.p4, q.p1);
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296 return 1 - 6.928203230275509 * area(q) / L2;
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297 }
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298
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299 struct MergedTriangles
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300 {
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301 std::vector<Quadrilateral> quadrilaterals;
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302 std::set<std::size_t> cutTriangles;
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303 };
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304
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305 static MergedTriangles mergeTriangles(
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306 const std::vector<std::uint16_t>& indices,
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307 const std::vector<glm::vec3>& polygon)
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308 {
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309 MergedTriangles result;
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310 using indextype = std::uint16_t;
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311 using indexpair = std::pair<indextype, indextype>;
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312 struct boundaryinfo { indextype third; std::size_t triangleid; };
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313 std::map<indexpair, boundaryinfo> boundaries;
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314 for (std::size_t i = 0; i < indices.size(); i += 3) {
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315 const auto add = [&](int o1, int o2, int o3){
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316 const auto key = std::make_pair(indices[i + o1], indices[i + o2]);
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317 boundaries[key] = {indices[i + o3], i};
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318 };
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319 add(0, 1, 2);
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320 add(1, 2, 0);
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321 add(2, 0, 1);
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322 }
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323 std::vector<std::array<indextype, 4>> quadindices;
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324 std::vector<Quadrilateral> quads;
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325 bool repeat = true;
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326 const auto iscut = [&result](const std::size_t i){
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327 return result.cutTriangles.find(i) != result.cutTriangles.end();
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328 };
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329 while (repeat) {
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330 repeat = false;
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331 // TODO: make this a function that returns quadrilateral indices
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332 // Go through triangle boundaries
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333 for (const auto& it1 : boundaries) {
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334 const indexpair& pair1 = it1.first;
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335 const boundaryinfo& boundary1 = it1.second;
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336 // .. the ones we haven't already merged anyway
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337 if (not iscut(boundary1.triangleid)) {
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338 // Look for its inverse boundary to find the touching triangle
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339 const auto pair2 = std::make_pair(pair1.second, pair1.first);
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340 const auto it2 = boundaries.find(pair2);
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341 // Also if that hasn't been cut
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342 if (it2 != boundaries.end() and not iscut(it2->second.triangleid)) {
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343 const Quadrilateral quad{
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344 polygon[pair1.first],
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345 polygon[it2->second.third],
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346 polygon[pair1.second],
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347 polygon[boundary1.third],
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348 };
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349 if (isConvex(quad)) {
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350 result.quadrilaterals.push_back(quad);
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351 result.cutTriangles.insert(boundary1.triangleid);
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352 result.cutTriangles.insert(it2->second.triangleid);
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353 repeat = true;
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354 }
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355 }
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356 }
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357 }
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358 }
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359 return result;
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360 }
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361
222
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362 const std::vector<ModelAction> EditTools::actions() const
197
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363 {
222
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364 std::vector<ModelAction> result;
223
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365 if (this->numpoints == 2) {
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366 result.push_back(AppendToModel{
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367 .newElement = Colored<LineSegment>{
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368 LineSegment{
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369 .p1 = this->polygon[0],
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370 .p2 = this->polygon[1],
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371 },
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372 EDGE_COLOR,
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373 }
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374 });
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375 }
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376 else if (this->numpoints > 2) {
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377 const glm::mat4 inverseGrid = glm::inverse(this->gridMatrix);
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378 std::vector<std::vector<glm::vec3>> polygons{1};
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379 std::vector<glm::vec3>& polygon2d = polygons.back();
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380 polygon2d.reserve(this->numpoints);
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381 for (std::size_t i = 0; i < this->numpoints; ++i) {
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diff changeset
382 polygon2d.push_back(inverseGrid * glm::vec4{this->polygon[i], 1});
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383 }
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diff changeset
384 using indextype = std::uint16_t;
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diff changeset
385 const std::vector<indextype> indices = mapbox::earcut<std::uint16_t>(polygons);
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386 MergedTriangles mergedTriangles = mergeTriangles(indices, this->polygon);
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387 for (const Quadrilateral& quad : mergedTriangles.quadrilaterals) {
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388 result.push_back(AppendToModel{
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389 .newElement = Colored<Quadrilateral>{quad, MAIN_COLOR},
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390 });
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391 }
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392 for (std::size_t i = 0; i < indices.size(); i += 3) {
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393 if (mergedTriangles.cutTriangles.find(i) == mergedTriangles.cutTriangles.end()) {
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394 result.push_back(AppendToModel{
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395 .newElement = Colored<Triangle>{
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396 Triangle{
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397 .p1 = this->polygon[indices[i]],
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398 .p2 = this->polygon[indices[i + 1]],
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399 .p3 = this->polygon[indices[i + 2]],
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400 },
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401 MAIN_COLOR,
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402 }
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403 });
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404 }
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405 }
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406 }
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407 return result;
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408 }
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409
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410 void EditTools::closeShape()
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411 {
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412 for (const ModelAction& action : this->actions()) {
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413 Q_EMIT this->modelAction(action);
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414 }
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415 this->polygon.clear();
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416 this->polygon.push_back(this->worldPosition.value_or(glm::vec3{0, 0, 0}));
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417 }

mercurial