comparison: src/layers/edittools.cpp
src/layers/edittools.cpp
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- 59b6027b9843
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- child 264
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| 262:dc33f8a707c4 | 263:59b6027b9843 |
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| 1 /* | |
| 2 * LDForge: LDraw parts authoring CAD | |
| 3 * Copyright (C) 2013 - 2020 Teemu Piippo | |
| 4 * | |
| 5 * This program is free software: you can redistribute it and/or modify | |
| 6 * it under the terms of the GNU General Public License as published by | |
| 7 * the Free Software Foundation, either version 3 of the License, or | |
| 8 * (at your option) any later version. | |
| 9 * | |
| 10 * This program is distributed in the hope that it will be useful, | |
| 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 * GNU General Public License for more details. | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License | |
| 16 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 17 */ | |
| 18 | |
| 19 #include <QMouseEvent> | |
| 20 #include <QPainter> | |
| 21 #include "../algorithm/earcut.h" | |
| 22 #include "../model.h" | |
| 23 #include "../ui/objecteditor.h" | |
| 24 #include "../gl/partrenderer.h" | |
| 25 #include "../circularprimitive.h" | |
| 26 #include "edittools.h" | |
| 27 | |
| 28 // Make mapbox::earcut work with glm::vec3 | |
| 29 template<> struct mapbox::util::nth<0, glm::vec3> | |
| 30 { | |
| 31 static constexpr float get(const glm::vec3& t) { return t.x; } | |
| 32 }; | |
| 33 | |
| 34 template<> struct mapbox::util::nth<1, glm::vec3> | |
| 35 { | |
| 36 static constexpr float get(const glm::vec3& t) { return t.y; } | |
| 37 }; | |
| 38 | |
| 39 EditTools::EditTools(QObject* parent) : | |
| 40 QObject{parent}, | |
| 41 RenderLayer{} | |
| 42 { | |
| 43 } | |
| 44 | |
| 45 EditTools::~EditTools() | |
| 46 { | |
| 47 } | |
| 48 | |
| 49 void EditTools::setEditMode(EditingMode newMode) | |
| 50 { | |
| 51 this->mode = newMode; | |
| 52 } | |
| 53 | |
| 54 void EditTools::setGridMatrix(const glm::mat4& newGridMatrix) | |
| 55 { | |
| 56 this->gridMatrix = newGridMatrix; | |
| 57 this->gridPlane = planeFromTriangle({ | |
| 58 this->gridMatrix * glm::vec4{0, 0, 0, 1}, | |
| 59 this->gridMatrix * glm::vec4{1, 0, 0, 1}, | |
| 60 this->gridMatrix * glm::vec4{0, 1, 0, 1}, | |
| 61 }); | |
| 62 } | |
| 63 | |
| 64 void EditTools::setCircleToolOptions(const CircleToolOptions& options) | |
| 65 { | |
| 66 this->circleToolOptions = options; | |
| 67 } | |
| 68 | |
| 69 void EditTools::mvpMatrixChanged(const glm::mat4& matrix) | |
| 70 { | |
| 71 this->mvpMatrix = matrix; | |
| 72 } | |
| 73 | |
| 74 void EditTools::mouseMoved(const QMouseEvent* event) | |
| 75 { | |
| 76 this->worldPosition = this->renderer->screenToModelCoordinates(event->pos(), this->gridPlane); | |
| 77 if (this->worldPosition.has_value()) | |
| 78 { | |
| 79 // Snap the position to grid. This procedure is basically the "change of basis" and almost follows the | |
| 80 // A⁻¹ × M × A formula which is used to perform a transformation in some other coordinate system, except | |
| 81 // we actually use the inverted matrix first and the regular one last to perform the transformation of | |
| 82 // grid coordinates in our XY coordinate system. Also, we're rounding the coordinates which is obviously | |
| 83 // not a linear transformation, but fits the pattern anyway. | |
| 84 // First transform the coordinates to the XY plane... | |
| 85 this->worldPosition = glm::inverse(this->gridMatrix) * glm::vec4{*this->worldPosition, 1}; | |
| 86 // Then round the coordinates to integer precision... | |
| 87 this->worldPosition = glm::round(*this->worldPosition); | |
| 88 // And finally transform it back to grid coordinates by transforming it with the | |
| 89 // grid matrix. | |
| 90 this->worldPosition = this->gridMatrix * glm::vec4{*this->worldPosition, 1}; | |
| 91 this->polygon.back() = *this->worldPosition; | |
| 92 } | |
| 93 this->numpoints = this->polygon.size(); | |
| 94 if (this->isCloseToExistingPoints()) { | |
| 95 this->numpoints -= 1; | |
| 96 } | |
| 97 } | |
| 98 | |
| 99 static QVector<QPointF> convertWorldPointsToScreenPoints( | |
| 100 const std::vector<glm::vec3> &worldPoints, | |
| 101 const PartRenderer* renderer) | |
| 102 { | |
| 103 QVector<QPointF> points2d; | |
| 104 points2d.reserve(static_cast<int>(worldPoints.size())); | |
| 105 for (const glm::vec3& point : worldPoints) | |
| 106 { | |
| 107 points2d.push_back(renderer->modelToScreenCoordinates(point)); | |
| 108 } | |
| 109 return points2d; | |
| 110 } | |
| 111 | |
| 112 static Winding worldPolygonWinding( | |
| 113 const std::vector<glm::vec3> &points, | |
| 114 const PartRenderer* renderer) | |
| 115 { | |
| 116 return winding(QPolygonF{convertWorldPointsToScreenPoints(points, renderer)}); | |
| 117 } | |
| 118 | |
| 119 static void drawWorldPoint( | |
| 120 QPainter* painter, | |
| 121 const glm::vec3& worldPoint, | |
| 122 const PartRenderer* renderer) | |
| 123 { | |
| 124 const QPointF center = renderer->modelToScreenCoordinates(worldPoint); | |
| 125 painter->drawEllipse(inscribe(CircleF{center, 5})); | |
| 126 } | |
| 127 | |
| 128 static void drawWorldPolyline( | |
| 129 QPainter *painter, | |
| 130 const std::vector<glm::vec3> &points, | |
| 131 const PartRenderer* renderer) | |
| 132 { | |
| 133 painter->drawPolyline(QPolygonF{convertWorldPointsToScreenPoints(points, renderer)}); | |
| 134 } | |
| 135 | |
| 136 static void drawWorldPolygon( | |
| 137 QPainter* painter, | |
| 138 const std::vector<glm::vec3> &points, | |
| 139 const PartRenderer* renderer) | |
| 140 { | |
| 141 painter->drawPolygon(QPolygonF{convertWorldPointsToScreenPoints(points, renderer)}); | |
| 142 } | |
| 143 | |
| 144 static std::vector<std::vector<glm::vec3>> modelActionPoints(const ModelAction& action) | |
| 145 { | |
| 146 std::vector<std::vector<glm::vec3>> result; | |
| 147 if (const AppendToModel* append = std::get_if<AppendToModel>(&action)) { | |
| 148 const ModelElement& newElement = append->newElement; | |
| 149 if (const LineSegment* seg = std::get_if<Colored<LineSegment>>(&newElement)) { | |
| 150 result.push_back({seg->p1, seg->p2}); | |
| 151 } | |
| 152 else if (const Triangle* tri = std::get_if<Colored<Triangle>>(&newElement)) { | |
| 153 result.push_back({tri->p1, tri->p2, tri->p3}); | |
| 154 } | |
| 155 else if (const Quadrilateral* quad = std::get_if<Colored<Quadrilateral>>(&newElement)) { | |
| 156 result.push_back({quad->p1, quad->p2, quad->p3, quad->p4}); | |
| 157 } | |
| 158 else if (const CircularPrimitive* circ = std::get_if<Colored<CircularPrimitive>>(&newElement)) { | |
| 159 rasterize(*circ, [&](const ModelElement& element){ | |
| 160 const auto& subpoints = modelActionPoints(AppendToModel{element}); | |
| 161 std::copy(subpoints.begin(), subpoints.end(), std::back_inserter(result)); | |
| 162 }); | |
| 163 } | |
| 164 } | |
| 165 return result; | |
| 166 } | |
| 167 | |
| 168 namespace { | |
| 169 struct Pens | |
| 170 { | |
| 171 const QBrush pointBrush; | |
| 172 const QPen pointPen; | |
| 173 const QPen textPen; | |
| 174 const QPen polygonPen; | |
| 175 const QPen badPolygonPen; | |
| 176 const QBrush greenPolygonBrush; | |
| 177 const QBrush redPolygonBrush; | |
| 178 }; | |
| 179 } | |
| 180 | |
| 181 static const Pens brightPens{ | |
| 182 .pointBrush = {Qt::black}, | |
| 183 .pointPen = {QBrush{Qt::black}, 2.0}, | |
| 184 .textPen = {Qt::black}, | |
| 185 .polygonPen = {QBrush{Qt::black}, 2.0, Qt::DashLine}, | |
| 186 .greenPolygonBrush = {QColor{64, 255, 128, 192}}, | |
| 187 .redPolygonBrush = {QColor{255, 96, 96, 192}}, | |
| 188 }; | |
| 189 | |
| 190 static const Pens darkPens{ | |
| 191 .pointBrush = {Qt::white}, | |
| 192 .pointPen = {QBrush{Qt::white}, 2.0}, | |
| 193 .textPen = {Qt::white}, | |
| 194 .polygonPen = {QBrush{Qt::white}, 2.0, Qt::DashLine}, | |
| 195 .greenPolygonBrush = {QColor{64, 255, 128, 192}}, | |
| 196 .redPolygonBrush = {QColor{255, 96, 96, 192}}, | |
| 197 }; | |
| 198 | |
| 199 void EditTools::overpaint(QPainter* painter) | |
| 200 { | |
| 201 painter->save(); | |
| 202 const Pens& pens = (this->renderer->isDark() ? darkPens : brightPens); | |
| 203 this->renderPreview(painter, &pens); | |
| 204 QFont font; | |
| 205 font.setBold(true); | |
| 206 if (this->worldPosition.has_value()) | |
| 207 { | |
| 208 painter->setRenderHint(QPainter::Antialiasing); | |
| 209 painter->setPen(pens.pointPen); | |
| 210 painter->setBrush(pens.greenPolygonBrush); | |
| 211 const QPointF pos = this->renderer->modelToScreenCoordinates(*this->worldPosition); | |
| 212 painter->drawEllipse(pos, 5, 5); | |
| 213 drawBorderedText(painter, pos + QPointF{5, 5}, font, vectorToString(*this->worldPosition)); | |
| 214 } | |
| 215 painter->restore(); | |
| 216 } | |
| 217 | |
| 218 const std::vector<ModelAction> EditTools::modelActions() const | |
| 219 { | |
| 220 switch(this->mode) { | |
| 221 case SelectMode: | |
| 222 return {}; | |
| 223 case DrawMode: | |
| 224 return drawModeActions(); | |
| 225 case CircleMode: | |
| 226 return circleModeActions(); | |
| 227 } | |
| 228 } | |
| 229 | |
| 230 void EditTools::renderPreview(QPainter* painter, const void* pensptr) | |
| 231 { | |
| 232 const Pens& pens = *reinterpret_cast<const Pens*>(pensptr); | |
| 233 painter->setPen(pens.polygonPen); | |
| 234 for (const ModelAction& action : this->modelActions()) { | |
| 235 for (const std::vector<glm::vec3>& points : modelActionPoints(action)) { | |
| 236 if (points.size() == 2) { | |
| 237 drawWorldPolyline(painter, points, renderer); | |
| 238 } | |
| 239 else { | |
| 240 if (worldPolygonWinding(points, this->renderer) == Winding::Clockwise) { | |
| 241 painter->setBrush(pens.greenPolygonBrush); | |
| 242 } | |
| 243 else { | |
| 244 painter->setBrush(pens.redPolygonBrush); | |
| 245 } | |
| 246 drawWorldPolygon(painter, points, this->renderer); | |
| 247 } | |
| 248 } | |
| 249 } | |
| 250 painter->setBrush(pens.pointBrush); | |
| 251 painter->setPen(pens.pointPen); | |
| 252 for (const glm::vec3& point : this->polygon) { | |
| 253 drawWorldPoint(painter, point, this->renderer); | |
| 254 } | |
| 255 } | |
| 256 | |
| 257 void EditTools::removeLastPoint() | |
| 258 { | |
| 259 if (this->polygon.size() > 1) { | |
| 260 this->polygon.erase(this->polygon.end() - 1); | |
| 261 } | |
| 262 } | |
| 263 | |
| 264 bool EditTools::isCloseToExistingPoints() const | |
| 265 { | |
| 266 if (this->worldPosition.has_value()) { | |
| 267 const glm::vec3& pos = *this->worldPosition; | |
| 268 return std::any_of(this->polygon.begin(), this->polygon.end() - 1, [&pos](const glm::vec3& p){ | |
| 269 return isclose(pos, p); | |
| 270 }); | |
| 271 } | |
| 272 else { | |
| 273 return false; | |
| 274 } | |
| 275 } | |
| 276 | |
| 277 EditingMode EditTools::currentEditingMode() const | |
| 278 { | |
| 279 return this->mode; | |
| 280 } | |
| 281 | |
| 282 void EditTools::mouseClick(const QMouseEvent* event) | |
| 283 { | |
| 284 switch(this->mode) { | |
| 285 case SelectMode: | |
| 286 if (event->button() == Qt::LeftButton) { | |
| 287 const ModelId highlighted = this->renderer->pick(event->pos()); | |
| 288 Q_EMIT this->select({highlighted}, false); | |
| 289 } | |
| 290 break; | |
| 291 case DrawMode: | |
| 292 if (event->button() == Qt::LeftButton and this->worldPosition.has_value()) { | |
| 293 if (isCloseToExistingPoints()) { | |
| 294 this->closeShape(); | |
| 295 } | |
| 296 else { | |
| 297 this->polygon.push_back(*this->worldPosition); | |
| 298 } | |
| 299 } | |
| 300 break; | |
| 301 case CircleMode: | |
| 302 if (event->button() == Qt::LeftButton and this->worldPosition.has_value()) { | |
| 303 if (this->polygon.size() == 2) { | |
| 304 this->closeShape(); | |
| 305 } | |
| 306 else { | |
| 307 this->polygon.push_back(*this->worldPosition); | |
| 308 } | |
| 309 } | |
| 310 break; | |
| 311 } | |
| 312 if (event->button() == Qt::RightButton and this->polygon.size() > 1) { | |
| 313 this->removeLastPoint(); | |
| 314 } | |
| 315 } | |
| 316 | |
| 317 struct MergedTriangles | |
| 318 { | |
| 319 std::vector<Quadrilateral> quadrilaterals; | |
| 320 std::set<std::size_t> cutTriangles; | |
| 321 }; | |
| 322 | |
| 323 static MergedTriangles mergeTriangles( | |
| 324 const std::vector<std::uint16_t>& indices, | |
| 325 const std::vector<glm::vec3>& polygon) | |
| 326 { | |
| 327 MergedTriangles result; | |
| 328 using indextype = std::uint16_t; | |
| 329 using indexpair = std::pair<indextype, indextype>; | |
| 330 struct boundaryinfo { indextype third; std::size_t triangleid; }; | |
| 331 std::map<indexpair, boundaryinfo> boundaries; | |
| 332 for (std::size_t i = 0; i < indices.size(); i += 3) { | |
| 333 const auto add = [&](const std::size_t o1, const std::size_t o2, const std::size_t o3){ | |
| 334 const auto key = std::make_pair(indices[i + o1], indices[i + o2]); | |
| 335 boundaries[key] = {indices[i + o3], i}; | |
| 336 }; | |
| 337 add(0, 1, 2); | |
| 338 add(1, 2, 0); | |
| 339 add(2, 0, 1); | |
| 340 } | |
| 341 std::vector<std::array<indextype, 4>> quadindices; | |
| 342 std::vector<Quadrilateral> quads; | |
| 343 bool repeat = true; | |
| 344 const auto iscut = [&result](const std::size_t i){ | |
| 345 return result.cutTriangles.find(i) != result.cutTriangles.end(); | |
| 346 }; | |
| 347 while (repeat) { | |
| 348 repeat = false; | |
| 349 // Go through triangle boundaries | |
| 350 for (const auto& it1 : boundaries) { | |
| 351 const indexpair& pair1 = it1.first; | |
| 352 const boundaryinfo& boundary1 = it1.second; | |
| 353 // .. the ones we haven't already merged anyway | |
| 354 if (not iscut(boundary1.triangleid)) { | |
| 355 // Look for its inverse boundary to find the touching triangle | |
| 356 const auto pair2 = std::make_pair(pair1.second, pair1.first); | |
| 357 const auto it2 = boundaries.find(pair2); | |
| 358 // Also if that hasn't been cut | |
| 359 if (it2 != boundaries.end() and not iscut(it2->second.triangleid)) { | |
| 360 const Quadrilateral quad{ | |
| 361 polygon[pair1.first], | |
| 362 polygon[it2->second.third], | |
| 363 polygon[pair1.second], | |
| 364 polygon[boundary1.third], | |
| 365 }; | |
| 366 if (isConvex(quad)) { | |
| 367 result.quadrilaterals.push_back(quad); | |
| 368 result.cutTriangles.insert(boundary1.triangleid); | |
| 369 result.cutTriangles.insert(it2->second.triangleid); | |
| 370 repeat = true; | |
| 371 } | |
| 372 } | |
| 373 } | |
| 374 } | |
| 375 } | |
| 376 return result; | |
| 377 } | |
| 378 | |
| 379 | |
| 380 const std::vector<ModelAction> EditTools::circleModeActions() const | |
| 381 { | |
| 382 std::vector<ModelAction> result; | |
| 383 if (this->numpoints == 2) { | |
| 384 const glm::vec3 x = polygon[1] - polygon[0]; | |
| 385 glm::mat4 transform{ | |
| 386 glm::vec4{x, 0}, | |
| 387 this->gridMatrix[2], | |
| 388 glm::vec4{glm::cross(glm::vec3{-this->gridMatrix[2]}, x), 0}, | |
| 389 glm::vec4{this->polygon[0], 1}, | |
| 390 }; | |
| 391 Colored<CircularPrimitive> circ{ | |
| 392 CircularPrimitive{ | |
| 393 .type = this->circleToolOptions.type, | |
| 394 .fraction = this->circleToolOptions.fraction, | |
| 395 .transformation = transform, | |
| 396 }, | |
| 397 MAIN_COLOR | |
| 398 }; | |
| 399 result.push_back(AppendToModel{.newElement = circ}); | |
| 400 } | |
| 401 return result; | |
| 402 } | |
| 403 | |
| 404 const std::vector<ModelAction> EditTools::drawModeActions() const | |
| 405 { | |
| 406 std::vector<ModelAction> result; | |
| 407 if (this->numpoints == 2) { | |
| 408 result.push_back(AppendToModel{ | |
| 409 .newElement = Colored<LineSegment>{ | |
| 410 LineSegment{ | |
| 411 .p1 = this->polygon[0], | |
| 412 .p2 = this->polygon[1], | |
| 413 }, | |
| 414 EDGE_COLOR, | |
| 415 } | |
| 416 }); | |
| 417 } | |
| 418 else if (this->numpoints > 2) { | |
| 419 const glm::mat4 inverseGrid = glm::inverse(this->gridMatrix); | |
| 420 std::vector<std::vector<glm::vec3>> polygons{1}; | |
| 421 std::vector<glm::vec3>& polygon2d = polygons.back(); | |
| 422 polygon2d.reserve(this->numpoints); | |
| 423 for (std::size_t i = 0; i < this->numpoints; ++i) { | |
| 424 polygon2d.push_back(inverseGrid * glm::vec4{this->polygon[i], 1}); | |
| 425 } | |
| 426 using indextype = std::uint16_t; | |
| 427 const std::vector<indextype> indices = mapbox::earcut<std::uint16_t>(polygons); | |
| 428 MergedTriangles mergedTriangles = mergeTriangles(indices, this->polygon); | |
| 429 for (const Quadrilateral& quad : mergedTriangles.quadrilaterals) { | |
| 430 result.push_back(AppendToModel{ | |
| 431 .newElement = Colored<Quadrilateral>{quad, MAIN_COLOR}, | |
| 432 }); | |
| 433 } | |
| 434 for (std::size_t i = 0; i < indices.size(); i += 3) { | |
| 435 if (mergedTriangles.cutTriangles.find(i) == mergedTriangles.cutTriangles.end()) { | |
| 436 result.push_back(AppendToModel{ | |
| 437 .newElement = Colored<Triangle>{ | |
| 438 Triangle{ | |
| 439 .p1 = this->polygon[indices[i]], | |
| 440 .p2 = this->polygon[indices[i + 1]], | |
| 441 .p3 = this->polygon[indices[i + 2]], | |
| 442 }, | |
| 443 MAIN_COLOR, | |
| 444 } | |
| 445 }); | |
| 446 } | |
| 447 } | |
| 448 } | |
| 449 return result; | |
| 450 } | |
| 451 | |
| 452 void EditTools::closeShape() | |
| 453 { | |
| 454 for (const ModelAction& action : this->modelActions()) { | |
| 455 Q_EMIT this->modelAction(action); | |
| 456 } | |
| 457 this->polygon.clear(); | |
| 458 this->polygon.push_back(this->worldPosition.value_or(glm::vec3{0, 0, 0})); | |
| 459 } |
