src/layers/edittools.cpp

Tue, 28 Jun 2022 19:36:03 +0300

author
Teemu Piippo <teemu.s.piippo@gmail.com>
date
Tue, 28 Jun 2022 19:36:03 +0300
changeset 298
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parent 264
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child 301
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permissions
-rw-r--r--

oops, that stuff isn't meant to be there yet

24
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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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Teemu Piippo <teemu@hecknology.net>
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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 "src/algorithm/earcut.h"
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22 #include "src/model.h"
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23 #include "src/ui/objecteditor.h"
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24 #include "src/gl/partrenderer.h"
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25 #include "src/circularprimitive.h"
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26 #include "src/layers/edittools.h"
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27
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28 // Make mapbox::earcut work with glm::vec3
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29 template<> struct mapbox::util::nth<0, glm::vec3>
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30 {
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31 static constexpr float get(const glm::vec3& t) { return t.x; }
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32 };
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34 template<> struct mapbox::util::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 EditTools::EditTools(QObject* parent) :
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40 QObject{parent},
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41 RenderLayer{}
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42 {
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43 }
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44
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45 EditTools::~EditTools()
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46 {
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47 }
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48
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49 void EditTools::setEditMode(EditingMode newMode)
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50 {
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51 this->mode = newMode;
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52 }
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53
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54 void EditTools::setGridMatrix(const glm::mat4& newGridMatrix)
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55 {
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56 this->gridMatrix = newGridMatrix;
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57 this->gridPlane = planeFromTriangle({
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58 this->gridMatrix * glm::vec4{0, 0, 0, 1},
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59 this->gridMatrix * glm::vec4{1, 0, 0, 1},
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60 this->gridMatrix * glm::vec4{0, 1, 0, 1},
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61 });
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62 }
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63
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64 void EditTools::setCircleToolOptions(const CircleToolOptions& options)
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65 {
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66 this->circleToolOptions = options;
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67 }
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68
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69 void EditTools::mvpMatrixChanged(const glm::mat4& matrix)
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70 {
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71 this->mvpMatrix = matrix;
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72 }
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73
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74 void EditTools::mouseMoved(const QMouseEvent* event)
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75 {
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76 this->worldPosition = this->renderer->screenToModelCoordinates(event->pos(), this->gridPlane);
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77 if (this->worldPosition.has_value())
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78 {
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79 // Snap the position to grid. This procedure is basically the "change of basis" and almost follows the
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80 // A⁻¹ × M × A formula which is used to perform a transformation in some other coordinate system, except
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81 // we actually use the inverted matrix first and the regular one last to perform the transformation of
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82 // grid coordinates in our XY coordinate system. Also, we're rounding the coordinates which is obviously
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83 // not a linear transformation, but fits the pattern anyway.
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84 // First transform the coordinates to the XY plane...
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85 this->worldPosition = glm::inverse(this->gridMatrix) * glm::vec4{*this->worldPosition, 1};
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86 // Then round the coordinates to integer precision...
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87 this->worldPosition = glm::round(*this->worldPosition);
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88 // And finally transform it back to grid coordinates by transforming it with the
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89 // grid matrix.
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90 this->worldPosition = this->gridMatrix * glm::vec4{*this->worldPosition, 1};
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91 this->polygon.back() = *this->worldPosition;
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92 }
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93 this->numpoints = this->polygon.size();
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94 if (this->isCloseToExistingPoints()) {
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95 this->numpoints -= 1;
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96 }
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97 }
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98
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99 static QVector<QPointF> convertWorldPointsToScreenPoints(
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100 const std::vector<glm::vec3> &worldPoints,
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101 const PartRenderer* renderer)
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102 {
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103 QVector<QPointF> points2d;
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104 points2d.reserve(static_cast<int>(worldPoints.size()));
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105 for (const glm::vec3& point : worldPoints)
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106 {
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107 points2d.push_back(renderer->modelToScreenCoordinates(point));
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108 }
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109 return points2d;
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110 }
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111
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112 static Winding worldPolygonWinding(
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113 const std::vector<glm::vec3> &points,
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114 const PartRenderer* renderer)
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115 {
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116 return winding(QPolygonF{convertWorldPointsToScreenPoints(points, renderer)});
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117 }
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118
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119 static void drawWorldPoint(
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120 QPainter* painter,
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121 const glm::vec3& worldPoint,
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122 const PartRenderer* renderer)
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123 {
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124 const QPointF center = renderer->modelToScreenCoordinates(worldPoint);
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125 painter->drawEllipse(inscribe(CircleF{center, 5}));
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126 }
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127
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128 static void drawWorldPolyline(
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129 QPainter *painter,
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130 const std::vector<glm::vec3> &points,
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131 const PartRenderer* renderer)
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132 {
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133 painter->drawPolyline(QPolygonF{convertWorldPointsToScreenPoints(points, renderer)});
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134 }
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135
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136 static void drawWorldPolygon(
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137 QPainter* painter,
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138 const std::vector<glm::vec3> &points,
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139 const PartRenderer* renderer)
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140 {
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141 painter->drawPolygon(QPolygonF{convertWorldPointsToScreenPoints(points, renderer)});
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142 }
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143
232
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144 static std::vector<std::vector<glm::vec3>> modelActionPoints(const ModelAction& action)
222
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145 {
232
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146 std::vector<std::vector<glm::vec3>> result;
222
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147 if (const AppendToModel* append = std::get_if<AppendToModel>(&action)) {
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148 const ModelElement& newElement = append->newElement;
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149 if (const LineSegment* seg = std::get_if<Colored<LineSegment>>(&newElement)) {
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150 result.push_back({seg->p1, seg->p2});
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151 }
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152 else if (const Triangle* tri = std::get_if<Colored<Triangle>>(&newElement)) {
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153 result.push_back({tri->p1, tri->p2, tri->p3});
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154 }
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155 else if (const Quadrilateral* quad = std::get_if<Colored<Quadrilateral>>(&newElement)) {
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156 result.push_back({quad->p1, quad->p2, quad->p3, quad->p4});
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157 }
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158 else if (const CircularPrimitive* circ = std::get_if<Colored<CircularPrimitive>>(&newElement)) {
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159 rasterize(*circ, [&](const ModelElement& element){
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160 const auto& subpoints = modelActionPoints(AppendToModel{element});
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161 std::copy(subpoints.begin(), subpoints.end(), std::back_inserter(result));
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162 });
222
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163 }
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164 }
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165 return result;
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166 }
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167
228
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168 namespace {
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169 struct Pens
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170 {
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171 const QBrush pointBrush;
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172 const QPen pointPen;
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173 const QPen textPen;
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174 const QPen polygonPen;
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175 const QPen badPolygonPen;
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176 const QBrush greenPolygonBrush;
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177 const QBrush redPolygonBrush;
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178 };
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179 }
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180
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181 static const Pens brightPens{
245
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182 .pointBrush = {Qt::black},
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183 .pointPen = {QBrush{Qt::black}, 2.0},
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184 .textPen = {Qt::black},
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185 .polygonPen = {QBrush{Qt::black}, 2.0, Qt::DashLine},
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186 .greenPolygonBrush = {QColor{64, 255, 128, 192}},
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187 .redPolygonBrush = {QColor{255, 96, 96, 192}},
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188 };
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189
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190 static const Pens darkPens{
245
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191 .pointBrush = {Qt::white},
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192 .pointPen = {QBrush{Qt::white}, 2.0},
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193 .textPen = {Qt::white},
228
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194 .polygonPen = {QBrush{Qt::white}, 2.0, Qt::DashLine},
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195 .greenPolygonBrush = {QColor{64, 255, 128, 192}},
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196 .redPolygonBrush = {QColor{255, 96, 96, 192}},
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197 };
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198
217
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199 void EditTools::overpaint(QPainter* painter)
197
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200 {
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201 painter->save();
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202 const Pens& pens = (this->renderer->isDark() ? darkPens : brightPens);
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203 this->renderPreview(painter, &pens);
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204 QFont font;
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205 font.setBold(true);
217
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206 if (this->worldPosition.has_value())
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207 {
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208 painter->setRenderHint(QPainter::Antialiasing);
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209 painter->setPen(pens.pointPen);
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210 painter->setBrush(pens.greenPolygonBrush);
217
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211 const QPointF pos = this->renderer->modelToScreenCoordinates(*this->worldPosition);
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212 painter->drawEllipse(pos, 5, 5);
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213 drawBorderedText(painter, pos + QPointF{5, 5}, font, vectorToString(*this->worldPosition));
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214 }
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215 painter->restore();
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216 }
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217
232
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218 const std::vector<ModelAction> EditTools::modelActions() const
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219 {
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220 switch(this->mode) {
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221 case SelectMode:
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222 return {};
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223 case DrawMode:
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224 return drawModeActions();
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225 case CircleMode:
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226 return circleModeActions();
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227 }
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228 }
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229
228
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230 void EditTools::renderPreview(QPainter* painter, const void* pensptr)
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231 {
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232 const Pens& pens = *reinterpret_cast<const Pens*>(pensptr);
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233 painter->setPen(pens.polygonPen);
232
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234 for (const ModelAction& action : this->modelActions()) {
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235 for (const std::vector<glm::vec3>& points : modelActionPoints(action)) {
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236 if (points.size() == 2) {
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237 drawWorldPolyline(painter, points, renderer);
228
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238 }
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239 else {
232
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240 if (worldPolygonWinding(points, this->renderer) == Winding::Clockwise) {
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241 painter->setBrush(pens.greenPolygonBrush);
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242 }
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243 else {
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244 painter->setBrush(pens.redPolygonBrush);
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245 }
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246 drawWorldPolygon(painter, points, this->renderer);
228
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247 }
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248 }
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249 }
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250 painter->setBrush(pens.pointBrush);
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251 painter->setPen(pens.pointPen);
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252 for (const glm::vec3& point : this->polygon) {
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253 drawWorldPoint(painter, point, this->renderer);
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254 }
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255 }
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256
217
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257 void EditTools::removeLastPoint()
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258 {
222
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259 if (this->polygon.size() > 1) {
217
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260 this->polygon.erase(this->polygon.end() - 1);
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261 }
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262 }
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263
223
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264 bool EditTools::isCloseToExistingPoints() const
197
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265 {
223
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266 if (this->worldPosition.has_value()) {
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267 const glm::vec3& pos = *this->worldPosition;
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268 return std::any_of(this->polygon.begin(), this->polygon.end() - 1, [&pos](const glm::vec3& p){
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269 return isclose(pos, p);
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270 });
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271 }
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272 else {
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273 return false;
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274 }
197
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275 }
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276
217
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277 EditingMode EditTools::currentEditingMode() const
197
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278 {
217
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279 return this->mode;
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280 }
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281
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282 void EditTools::mouseClick(const QMouseEvent* event)
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283 {
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284 switch(this->mode) {
197
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285 case SelectMode:
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286 if (event->button() == Qt::LeftButton) {
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287 const ModelId highlighted = this->renderer->pick(event->pos());
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288 Q_EMIT this->select({highlighted}, false);
197
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289 }
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290 break;
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291 case DrawMode:
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292 if (event->button() == Qt::LeftButton and this->worldPosition.has_value()) {
223
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293 if (isCloseToExistingPoints()) {
197
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294 this->closeShape();
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295 }
214
8e1fe64ce4e3 begin refactor of gl side
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296 else {
217
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297 this->polygon.push_back(*this->worldPosition);
197
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298 }
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299 }
232
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300 break;
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301 case CircleMode:
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302 if (event->button() == Qt::LeftButton and this->worldPosition.has_value()) {
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303 if (this->polygon.size() == 2) {
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304 this->closeShape();
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305 }
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306 else {
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307 this->polygon.push_back(*this->worldPosition);
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308 }
197
0e729e681a2c move drawState to Document
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309 }
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310 break;
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311 }
232
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312 if (event->button() == Qt::RightButton and this->polygon.size() > 1) {
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313 this->removeLastPoint();
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314 }
223
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315 }
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316
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317 struct MergedTriangles
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318 {
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319 std::vector<Quadrilateral> quadrilaterals;
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320 std::set<std::size_t> cutTriangles;
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321 };
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322
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323 static MergedTriangles mergeTriangles(
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324 const std::vector<std::uint16_t>& indices,
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325 const std::vector<glm::vec3>& polygon)
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326 {
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327 MergedTriangles result;
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diff changeset
328 using indextype = std::uint16_t;
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329 using indexpair = std::pair<indextype, indextype>;
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330 struct boundaryinfo { indextype third; std::size_t triangleid; };
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331 std::map<indexpair, boundaryinfo> boundaries;
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332 for (std::size_t i = 0; i < indices.size(); i += 3) {
250
2837b549e616 I felt that the compiler was too kind to me, so I enabled a big pile of warnings
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diff changeset
333 const auto add = [&](const std::size_t o1, const std::size_t o2, const std::size_t o3){
223
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diff changeset
334 const auto key = std::make_pair(indices[i + o1], indices[i + o2]);
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diff changeset
335 boundaries[key] = {indices[i + o3], i};
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336 };
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337 add(0, 1, 2);
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338 add(1, 2, 0);
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339 add(2, 0, 1);
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340 }
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diff changeset
341 std::vector<std::array<indextype, 4>> quadindices;
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diff changeset
342 std::vector<Quadrilateral> quads;
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diff changeset
343 bool repeat = true;
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diff changeset
344 const auto iscut = [&result](const std::size_t i){
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diff changeset
345 return result.cutTriangles.find(i) != result.cutTriangles.end();
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diff changeset
346 };
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diff changeset
347 while (repeat) {
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348 repeat = false;
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diff changeset
349 // Go through triangle boundaries
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diff changeset
350 for (const auto& it1 : boundaries) {
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diff changeset
351 const indexpair& pair1 = it1.first;
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diff changeset
352 const boundaryinfo& boundary1 = it1.second;
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diff changeset
353 // .. the ones we haven't already merged anyway
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diff changeset
354 if (not iscut(boundary1.triangleid)) {
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diff changeset
355 // Look for its inverse boundary to find the touching triangle
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diff changeset
356 const auto pair2 = std::make_pair(pair1.second, pair1.first);
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diff changeset
357 const auto it2 = boundaries.find(pair2);
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diff changeset
358 // Also if that hasn't been cut
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diff changeset
359 if (it2 != boundaries.end() and not iscut(it2->second.triangleid)) {
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diff changeset
360 const Quadrilateral quad{
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diff changeset
361 polygon[pair1.first],
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diff changeset
362 polygon[it2->second.third],
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diff changeset
363 polygon[pair1.second],
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diff changeset
364 polygon[boundary1.third],
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diff changeset
365 };
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diff changeset
366 if (isConvex(quad)) {
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diff changeset
367 result.quadrilaterals.push_back(quad);
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diff changeset
368 result.cutTriangles.insert(boundary1.triangleid);
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diff changeset
369 result.cutTriangles.insert(it2->second.triangleid);
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diff changeset
370 repeat = true;
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diff changeset
371 }
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diff changeset
372 }
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diff changeset
373 }
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diff changeset
374 }
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diff changeset
375 }
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diff changeset
376 return result;
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diff changeset
377 }
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diff changeset
378
232
8efa3a33172e Add base code for circular primitives
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diff changeset
379
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diff changeset
380 const std::vector<ModelAction> EditTools::circleModeActions() const
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diff changeset
381 {
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diff changeset
382 std::vector<ModelAction> result;
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diff changeset
383 if (this->numpoints == 2) {
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diff changeset
384 const glm::vec3 x = polygon[1] - polygon[0];
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diff changeset
385 glm::mat4 transform{
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diff changeset
386 glm::vec4{x, 0},
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diff changeset
387 this->gridMatrix[2],
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diff changeset
388 glm::vec4{glm::cross(glm::vec3{-this->gridMatrix[2]}, x), 0},
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diff changeset
389 glm::vec4{this->polygon[0], 1},
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diff changeset
390 };
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diff changeset
391 Colored<CircularPrimitive> circ{
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diff changeset
392 CircularPrimitive{
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diff changeset
393 .type = this->circleToolOptions.type,
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diff changeset
394 .fraction = this->circleToolOptions.fraction,
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diff changeset
395 .transformation = transform,
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diff changeset
396 },
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diff changeset
397 MAIN_COLOR
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398 };
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399 result.push_back(AppendToModel{.newElement = circ});
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400 }
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401 return result;
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402 }
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403
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404 const std::vector<ModelAction> EditTools::drawModeActions() const
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405 {
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406 std::vector<ModelAction> result;
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407 if (this->numpoints == 2) {
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408 result.push_back(AppendToModel{
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409 .newElement = Colored<LineSegment>{
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410 LineSegment{
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411 .p1 = this->polygon[0],
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412 .p2 = this->polygon[1],
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413 },
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414 EDGE_COLOR,
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415 }
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416 });
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417 }
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418 else if (this->numpoints > 2) {
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419 const glm::mat4 inverseGrid = glm::inverse(this->gridMatrix);
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420 std::vector<std::vector<glm::vec3>> polygons{1};
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421 std::vector<glm::vec3>& polygon2d = polygons.back();
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422 polygon2d.reserve(this->numpoints);
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423 for (std::size_t i = 0; i < this->numpoints; ++i) {
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424 polygon2d.push_back(inverseGrid * glm::vec4{this->polygon[i], 1});
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425 }
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426 using indextype = std::uint16_t;
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427 const std::vector<indextype> indices = mapbox::earcut<std::uint16_t>(polygons);
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428 MergedTriangles mergedTriangles = mergeTriangles(indices, this->polygon);
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429 for (const Quadrilateral& quad : mergedTriangles.quadrilaterals) {
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430 result.push_back(AppendToModel{
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431 .newElement = Colored<Quadrilateral>{quad, MAIN_COLOR},
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432 });
223
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433 }
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434 for (std::size_t i = 0; i < indices.size(); i += 3) {
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435 if (mergedTriangles.cutTriangles.find(i) == mergedTriangles.cutTriangles.end()) {
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436 result.push_back(AppendToModel{
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437 .newElement = Colored<Triangle>{
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438 Triangle{
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439 .p1 = this->polygon[indices[i]],
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440 .p2 = this->polygon[indices[i + 1]],
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441 .p3 = this->polygon[indices[i + 2]],
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442 },
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443 MAIN_COLOR,
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444 }
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445 });
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446 }
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447 }
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448 }
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449 return result;
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450 }
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451
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452 void EditTools::closeShape()
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453 {
232
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454 for (const ModelAction& action : this->modelActions()) {
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455 Q_EMIT this->modelAction(action);
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456 }
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457 this->polygon.clear();
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458 this->polygon.push_back(this->worldPosition.value_or(glm::vec3{0, 0, 0}));
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459 }

mercurial