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| -rw-r--r-- | src/livarot/ShapeSweep.cpp | 3317 |
1 files changed, 3317 insertions, 0 deletions
diff --git a/src/livarot/ShapeSweep.cpp b/src/livarot/ShapeSweep.cpp new file mode 100644 index 0000000..9b5d276 --- /dev/null +++ b/src/livarot/ShapeSweep.cpp @@ -0,0 +1,3317 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/** @file + * TODO: insert short description here + *//* + * Authors: + * see git history + * Fred + * + * Copyright (C) 2018 Authors + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#include <cstdio> +#include <cstdlib> +#include <cstring> +#include <glib.h> +#include <2geom/affine.h> +#include "Shape.h" +#include "livarot/sweep-event-queue.h" +#include "livarot/sweep-tree-list.h" +#include "livarot/sweep-tree.h" + +//int doDebug=0; + +/* + * El Intersector. + * algorithm: 1) benley ottman to get intersections of all the polygon's edges + * 2) rounding of the points of the polygon, Hooby's algorithm + * 3) DFS with clockwise choice of the edge to compute the windings + * 4) choose edges according to winding numbers and fill rule + * some additional nastyness: step 2 needs a seed winding number for the upper-left point of each + * connex subgraph of the graph. computing these brutally is O(n^3): baaaad. so during the sweeping in 1) + * we keep for each point the edge of the resulting graph (not the original) that lies just on its left; + * when the time comes for the point to get its winding number computed, that edge must have been treated, + * because its upper end lies above the aforementioned point, meaning we know the winding number of the point. + * only, there is a catch: since we're sweeping the polygon, the edge we want to link the point to has not yet been + * added (that would be too easy...). so the points are put on a linked list on the original shape's edge, and the list + * is flushed when the edge is added. + * rounding: to do the rounding, we need to find which edges cross the surrounding of the rounded points (at + * each sweepline position). grunt method tries all combination of "rounded points in the sweepline"x"edges crossing + * the sweepline". That's bad (and that's what polyboolean does, if i am not mistaken). so for each point + * rounded in a given sweepline, keep immediate left and right edges at the time the point is treated. + * when edges/points crossing are searched, walk the edge list (in the sweepline at the end of the batch) starting + * from the rounded points' left and right from that time. may sound strange, but it works because edges that + * end or start in the batch have at least one end in the batch. + * all these are the cause of the numerous linked lists of points and edges maintained in the sweeping + */ + +void +Shape::ResetSweep () +{ + MakePointData (true); + MakeEdgeData (true); + MakeSweepSrcData (true); +} + +void +Shape::CleanupSweep () +{ + MakePointData (false); + MakeEdgeData (false); + MakeSweepSrcData (false); +} + +void +Shape::ForceToPolygon () +{ + type = shape_polygon; +} + +int +Shape::Reoriente (Shape * a) +{ + Reset (0, 0); + if (a->numberOfPoints() <= 1 || a->numberOfEdges() <= 1) + return 0; + if (directedEulerian(a) == false) + return shape_input_err; + + _pts = a->_pts; + if (numberOfPoints() > maxPt) + { + maxPt = numberOfPoints(); + if (_has_points_data) { + pData.resize(maxPt); + _point_data_initialised = false; + _bbox_up_to_date = false; + } + } + + _aretes = a->_aretes; + if (numberOfEdges() > maxAr) + { + maxAr = numberOfEdges(); + if (_has_edges_data) + eData.resize(maxAr); + if (_has_sweep_src_data) + swsData.resize(maxAr); + if (_has_sweep_dest_data) + swdData.resize(maxAr); + if (_has_raster_data) + swrData.resize(maxAr); + } + + MakePointData (true); + MakeEdgeData (true); + MakeSweepDestData (true); + + initialisePointData(); + + for (int i = 0; i < numberOfPoints(); i++) { + _pts[i].x = pData[i].rx; + _pts[i].oldDegree = getPoint(i).totalDegree(); + } + + for (int i = 0; i < a->numberOfEdges(); i++) + { + eData[i].rdx = pData[getEdge(i).en].rx - pData[getEdge(i).st].rx; + eData[i].weight = 1; + _aretes[i].dx = eData[i].rdx; + } + + SortPointsRounded (); + + _need_edges_sorting = true; + GetWindings (this, nullptr, bool_op_union, true); + +// Plot(341,56,8,400,400,true,true,false,true); + for (int i = 0; i < numberOfEdges(); i++) + { + swdData[i].leW %= 2; + swdData[i].riW %= 2; + if (swdData[i].leW < 0) + swdData[i].leW = -swdData[i].leW; + if (swdData[i].riW < 0) + swdData[i].riW = -swdData[i].riW; + if (swdData[i].leW > 0 && swdData[i].riW <= 0) + { + eData[i].weight = 1; + } + else if (swdData[i].leW <= 0 && swdData[i].riW > 0) + { + Inverse (i); + eData[i].weight = 1; + } + else + { + eData[i].weight = 0; + SubEdge (i); + i--; + } + } + + MakePointData (false); + MakeEdgeData (false); + MakeSweepDestData (false); + + if (directedEulerian(this) == false) + { +// printf( "pas euclidian2"); + _pts.clear(); + _aretes.clear(); + return shape_euler_err; + } + + type = shape_polygon; + return 0; +} + +int +Shape::ConvertToShape (Shape * a, FillRule directed, bool invert) +{ + Reset (0, 0); + + if (a->numberOfPoints() <= 1 || a->numberOfEdges() <= 1) { + return 0; + } + + if ( directed != fill_justDont && directedEulerian(a) == false ) { + g_warning ("Shape error in ConvertToShape: directedEulerian(a) == false\n"); + return shape_input_err; + } + + a->ResetSweep(); + + if (sTree == nullptr) { + sTree = new SweepTreeList(a->numberOfEdges()); + } + if (sEvts == nullptr) { + sEvts = new SweepEventQueue(a->numberOfEdges()); + } + + MakePointData(true); + MakeEdgeData(true); + MakeSweepSrcData(true); + MakeSweepDestData(true); + MakeBackData(a->_has_back_data); + + a->initialisePointData(); + a->initialiseEdgeData(); + + a->SortPointsRounded(); + + chgts.clear(); + + double lastChange = a->pData[0].rx[1] - 1.0; + int lastChgtPt = 0; + int edgeHead = -1; + Shape *shapeHead = nullptr; + + clearIncidenceData(); + + int curAPt = 0; + + while (curAPt < a->numberOfPoints() || sEvts->size() > 0) { + Geom::Point ptX; + double ptL, ptR; + SweepTree *intersL = nullptr; + SweepTree *intersR = nullptr; + int nPt = -1; + Shape *ptSh = nullptr; + bool isIntersection = false; + if (sEvts->peek(intersL, intersR, ptX, ptL, ptR)) + { + if (a->pData[curAPt].pending > 0 + || (a->pData[curAPt].rx[1] > ptX[1] + || (a->pData[curAPt].rx[1] == ptX[1] + && a->pData[curAPt].rx[0] > ptX[0]))) + { + /* FIXME: could just be pop? */ + sEvts->extract(intersL, intersR, ptX, ptL, ptR); + isIntersection = true; + } + else + { + nPt = curAPt++; + ptSh = a; + ptX = ptSh->pData[nPt].rx; + isIntersection = false; + } + } + else + { + nPt = curAPt++; + ptSh = a; + ptX = ptSh->pData[nPt].rx; + isIntersection = false; + } + + if (isIntersection == false) + { + if (ptSh->getPoint(nPt).dI == 0 && ptSh->getPoint(nPt).dO == 0) + continue; + } + + Geom::Point rPtX; + rPtX[0]= Round (ptX[0]); + rPtX[1]= Round (ptX[1]); + int lastPointNo = AddPoint (rPtX); + pData[lastPointNo].rx = rPtX; + + if (rPtX[1] > lastChange) + { + int lastI = AssemblePoints (lastChgtPt, lastPointNo); + + Shape *curSh = shapeHead; + int curBo = edgeHead; + while (curSh) + { + curSh->swsData[curBo].leftRnd = + pData[curSh->swsData[curBo].leftRnd].newInd; + curSh->swsData[curBo].rightRnd = + pData[curSh->swsData[curBo].rightRnd].newInd; + + Shape *neSh = curSh->swsData[curBo].nextSh; + curBo = curSh->swsData[curBo].nextBo; + curSh = neSh; + } + + for (auto & chgt : chgts) + { + chgt.ptNo = pData[chgt.ptNo].newInd; + if (chgt.type == 0) + { + if (chgt.src->getEdge(chgt.bord).st < + chgt.src->getEdge(chgt.bord).en) + { + chgt.src->swsData[chgt.bord].stPt = + chgt.ptNo; + } + else + { + chgt.src->swsData[chgt.bord].enPt = + chgt.ptNo; + } + } + else if (chgt.type == 1) + { + if (chgt.src->getEdge(chgt.bord).st > + chgt.src->getEdge(chgt.bord).en) + { + chgt.src->swsData[chgt.bord].stPt = + chgt.ptNo; + } + else + { + chgt.src->swsData[chgt.bord].enPt = + chgt.ptNo; + } + } + } + + CheckAdjacencies (lastI, lastChgtPt, shapeHead, edgeHead); + + CheckEdges (lastI, lastChgtPt, a, nullptr, bool_op_union); + + for (int i = lastChgtPt; i < lastI; i++) { + if (pData[i].askForWindingS) { + Shape *windS = pData[i].askForWindingS; + int windB = pData[i].askForWindingB; + pData[i].nextLinkedPoint = windS->swsData[windB].firstLinkedPoint; + windS->swsData[windB].firstLinkedPoint = i; + } + } + + if (lastI < lastPointNo) { + _pts[lastI] = getPoint(lastPointNo); + pData[lastI] = pData[lastPointNo]; + } + lastPointNo = lastI; + _pts.resize(lastI + 1); + + lastChgtPt = lastPointNo; + lastChange = rPtX[1]; + chgts.clear(); + edgeHead = -1; + shapeHead = nullptr; + } + + + if (isIntersection) + { +// printf("(%i %i [%i %i]) ",intersL->bord,intersR->bord,intersL->startPoint,intersR->startPoint); + intersL->RemoveEvent (*sEvts, LEFT); + intersR->RemoveEvent (*sEvts, RIGHT); + + AddChgt (lastPointNo, lastChgtPt, shapeHead, edgeHead, INTERSECTION, + intersL->src, intersL->bord, intersR->src, intersR->bord); + + intersL->SwapWithRight (*sTree, *sEvts); + + TesteIntersection (intersL, LEFT, false); + TesteIntersection (intersR, RIGHT, false); + } + else + { + int cb; + + int nbUp = 0, nbDn = 0; + int upNo = -1, dnNo = -1; + cb = ptSh->getPoint(nPt).incidentEdge[FIRST]; + while (cb >= 0 && cb < ptSh->numberOfEdges()) + { + if ((ptSh->getEdge(cb).st < ptSh->getEdge(cb).en + && nPt == ptSh->getEdge(cb).en) + || (ptSh->getEdge(cb).st > ptSh->getEdge(cb).en + && nPt == ptSh->getEdge(cb).st)) + { + upNo = cb; + nbUp++; + } + if ((ptSh->getEdge(cb).st > ptSh->getEdge(cb).en + && nPt == ptSh->getEdge(cb).en) + || (ptSh->getEdge(cb).st < ptSh->getEdge(cb).en + && nPt == ptSh->getEdge(cb).st)) + { + dnNo = cb; + nbDn++; + } + cb = ptSh->NextAt (nPt, cb); + } + + if (nbDn <= 0) + { + upNo = -1; + } + if (upNo >= 0 && (SweepTree *) ptSh->swsData[upNo].misc == nullptr) + { + upNo = -1; + } + + bool doWinding = true; + + if (nbUp > 0) + { + cb = ptSh->getPoint(nPt).incidentEdge[FIRST]; + while (cb >= 0 && cb < ptSh->numberOfEdges()) + { + if ((ptSh->getEdge(cb).st < ptSh->getEdge(cb).en + && nPt == ptSh->getEdge(cb).en) + || (ptSh->getEdge(cb).st > ptSh->getEdge(cb).en + && nPt == ptSh->getEdge(cb).st)) + { + if (cb != upNo) + { + SweepTree *node = + (SweepTree *) ptSh->swsData[cb].misc; + if (node == nullptr) + { + } + else + { + AddChgt (lastPointNo, lastChgtPt, shapeHead, + edgeHead, EDGE_REMOVED, node->src, node->bord, + nullptr, -1); + ptSh->swsData[cb].misc = nullptr; + + int onLeftB = -1, onRightB = -1; + Shape *onLeftS = nullptr; + Shape *onRightS = nullptr; + if (node->elem[LEFT]) + { + onLeftB = + (static_cast < + SweepTree * >(node->elem[LEFT]))->bord; + onLeftS = + (static_cast < + SweepTree * >(node->elem[LEFT]))->src; + } + if (node->elem[RIGHT]) + { + onRightB = + (static_cast < + SweepTree * >(node->elem[RIGHT]))->bord; + onRightS = + (static_cast < + SweepTree * >(node->elem[RIGHT]))->src; + } + + node->Remove (*sTree, *sEvts, true); + if (onLeftS && onRightS) + { + SweepTree *onLeft = + (SweepTree *) onLeftS->swsData[onLeftB]. + misc; + if (onLeftS == ptSh + && (onLeftS->getEdge(onLeftB).en == nPt + || onLeftS->getEdge(onLeftB).st == + nPt)) + { + } + else + { + if (onRightS == ptSh + && (onRightS->getEdge(onRightB).en == + nPt + || onRightS->getEdge(onRightB). + st == nPt)) + { + } + else + { + TesteIntersection (onLeft, RIGHT, false); + } + } + } + } + } + } + cb = ptSh->NextAt (nPt, cb); + } + } + + // traitement du "upNo devient dnNo" + SweepTree *insertionNode = nullptr; + if (dnNo >= 0) + { + if (upNo >= 0) + { + SweepTree *node = (SweepTree *) ptSh->swsData[upNo].misc; + + AddChgt (lastPointNo, lastChgtPt, shapeHead, edgeHead, EDGE_REMOVED, + node->src, node->bord, nullptr, -1); + + ptSh->swsData[upNo].misc = nullptr; + + node->RemoveEvents (*sEvts); + node->ConvertTo (ptSh, dnNo, 1, lastPointNo); + ptSh->swsData[dnNo].misc = node; + TesteIntersection (node, RIGHT, false); + TesteIntersection (node, LEFT, false); + insertionNode = node; + + ptSh->swsData[dnNo].curPoint = lastPointNo; + AddChgt (lastPointNo, lastChgtPt, shapeHead, edgeHead, EDGE_INSERTED, + node->src, node->bord, nullptr, -1); + } + else + { + SweepTree *node = sTree->add(ptSh, dnNo, 1, lastPointNo, this); + ptSh->swsData[dnNo].misc = node; + node->Insert (*sTree, *sEvts, this, lastPointNo, true); + if (doWinding) + { + SweepTree *myLeft = + static_cast < SweepTree * >(node->elem[LEFT]); + if (myLeft) + { + pData[lastPointNo].askForWindingS = myLeft->src; + pData[lastPointNo].askForWindingB = myLeft->bord; + } + else + { + pData[lastPointNo].askForWindingB = -1; + } + doWinding = false; + } + TesteIntersection (node, RIGHT, false); + TesteIntersection (node, LEFT, false); + insertionNode = node; + + ptSh->swsData[dnNo].curPoint = lastPointNo; + AddChgt (lastPointNo, lastChgtPt, shapeHead, edgeHead, EDGE_INSERTED, + node->src, node->bord, nullptr, -1); + } + } + + if (nbDn > 1) + { // si nbDn == 1 , alors dnNo a deja ete traite + cb = ptSh->getPoint(nPt).incidentEdge[FIRST]; + while (cb >= 0 && cb < ptSh->numberOfEdges()) + { + if ((ptSh->getEdge(cb).st > ptSh->getEdge(cb).en + && nPt == ptSh->getEdge(cb).en) + || (ptSh->getEdge(cb).st < ptSh->getEdge(cb).en + && nPt == ptSh->getEdge(cb).st)) + { + if (cb != dnNo) + { + SweepTree *node = sTree->add(ptSh, cb, 1, lastPointNo, this); + ptSh->swsData[cb].misc = node; + node->InsertAt (*sTree, *sEvts, this, insertionNode, + nPt, true); + if (doWinding) + { + SweepTree *myLeft = + static_cast < SweepTree * >(node->elem[LEFT]); + if (myLeft) + { + pData[lastPointNo].askForWindingS = + myLeft->src; + pData[lastPointNo].askForWindingB = + myLeft->bord; + } + else + { + pData[lastPointNo].askForWindingB = -1; + } + doWinding = false; + } + TesteIntersection (node, RIGHT, false); + TesteIntersection (node, LEFT, false); + + ptSh->swsData[cb].curPoint = lastPointNo; + AddChgt (lastPointNo, lastChgtPt, shapeHead, + edgeHead, EDGE_INSERTED, node->src, node->bord, nullptr, + -1); + } + } + cb = ptSh->NextAt (nPt, cb); + } + } + } + } + { + int lastI = AssemblePoints (lastChgtPt, numberOfPoints()); + + + Shape *curSh = shapeHead; + int curBo = edgeHead; + while (curSh) + { + curSh->swsData[curBo].leftRnd = + pData[curSh->swsData[curBo].leftRnd].newInd; + curSh->swsData[curBo].rightRnd = + pData[curSh->swsData[curBo].rightRnd].newInd; + + Shape *neSh = curSh->swsData[curBo].nextSh; + curBo = curSh->swsData[curBo].nextBo; + curSh = neSh; + } + + for (auto & chgt : chgts) + { + chgt.ptNo = pData[chgt.ptNo].newInd; + if (chgt.type == 0) + { + if (chgt.src->getEdge(chgt.bord).st < + chgt.src->getEdge(chgt.bord).en) + { + chgt.src->swsData[chgt.bord].stPt = chgt.ptNo; + } + else + { + chgt.src->swsData[chgt.bord].enPt = chgt.ptNo; + } + } + else if (chgt.type == 1) + { + if (chgt.src->getEdge(chgt.bord).st > + chgt.src->getEdge(chgt.bord).en) + { + chgt.src->swsData[chgt.bord].stPt = chgt.ptNo; + } + else + { + chgt.src->swsData[chgt.bord].enPt = chgt.ptNo; + } + } + } + + CheckAdjacencies (lastI, lastChgtPt, shapeHead, edgeHead); + + CheckEdges (lastI, lastChgtPt, a, nullptr, bool_op_union); + + for (int i = lastChgtPt; i < lastI; i++) + { + if (pData[i].askForWindingS) + { + Shape *windS = pData[i].askForWindingS; + int windB = pData[i].askForWindingB; + pData[i].nextLinkedPoint = windS->swsData[windB].firstLinkedPoint; + windS->swsData[windB].firstLinkedPoint = i; + } + } + + _pts.resize(lastI); + + edgeHead = -1; + shapeHead = nullptr; + } + + chgts.clear(); + +// Plot (98.0, 112.0, 8.0, 400.0, 400.0, true, true, true, true); +// Plot(200.0,200.0,2.0,400.0,400.0,true,true,true,true); + + // AssemblePoints(a); + +// GetAdjacencies(a); + +// MakeAretes(a); + clearIncidenceData(); + + AssembleAretes (directed); + +// Plot (98.0, 112.0, 8.0, 400.0, 400.0, true, true, true, true); + + for (int i = 0; i < numberOfPoints(); i++) + { + _pts[i].oldDegree = getPoint(i).totalDegree(); + } +// Validate(); + + _need_edges_sorting = true; + if ( directed == fill_justDont ) { + SortEdges(); + } else { + GetWindings (a); + } +// Plot (98.0, 112.0, 8.0, 400.0, 400.0, true, true, true, true); +// if ( doDebug ) { +// a->CalcBBox(); +// a->Plot(a->leftX,a->topY,32.0,0.0,0.0,true,true,true,true,"orig.svg"); +// Plot(a->leftX,a->topY,32.0,0.0,0.0,true,true,true,true,"winded.svg"); +// } + if (directed == fill_positive) + { + if (invert) + { + for (int i = 0; i < numberOfEdges(); i++) + { + if (swdData[i].leW < 0 && swdData[i].riW >= 0) + { + eData[i].weight = 1; + } + else if (swdData[i].leW >= 0 && swdData[i].riW < 0) + { + Inverse (i); + eData[i].weight = 1; + } + else + { + eData[i].weight = 0; + SubEdge (i); + i--; + } + } + } + else + { + for (int i = 0; i < numberOfEdges(); i++) + { + if (swdData[i].leW > 0 && swdData[i].riW <= 0) + { + eData[i].weight = 1; + } + else if (swdData[i].leW <= 0 && swdData[i].riW > 0) + { + Inverse (i); + eData[i].weight = 1; + } + else + { + eData[i].weight = 0; + SubEdge (i); + i--; + } + } + } + } + else if (directed == fill_nonZero) + { + if (invert) + { + for (int i = 0; i < numberOfEdges(); i++) + { + if (swdData[i].leW < 0 && swdData[i].riW == 0) + { + eData[i].weight = 1; + } + else if (swdData[i].leW > 0 && swdData[i].riW == 0) + { + eData[i].weight = 1; + } + else if (swdData[i].leW == 0 && swdData[i].riW < 0) + { + Inverse (i); + eData[i].weight = 1; + } + else if (swdData[i].leW == 0 && swdData[i].riW > 0) + { + Inverse (i); + eData[i].weight = 1; + } + else + { + eData[i].weight = 0; + SubEdge (i); + i--; + } + } + } + else + { + for (int i = 0; i < numberOfEdges(); i++) + { + if (swdData[i].leW > 0 && swdData[i].riW == 0) + { + eData[i].weight = 1; + } + else if (swdData[i].leW < 0 && swdData[i].riW == 0) + { + eData[i].weight = 1; + } + else if (swdData[i].leW == 0 && swdData[i].riW > 0) + { + Inverse (i); + eData[i].weight = 1; + } + else if (swdData[i].leW == 0 && swdData[i].riW < 0) + { + Inverse (i); + eData[i].weight = 1; + } + else + { + eData[i].weight = 0; + SubEdge (i); + i--; + } + } + } + } + else if (directed == fill_oddEven) + { + for (int i = 0; i < numberOfEdges(); i++) + { + swdData[i].leW %= 2; + swdData[i].riW %= 2; + if (swdData[i].leW < 0) + swdData[i].leW = -swdData[i].leW; + if (swdData[i].riW < 0) + swdData[i].riW = -swdData[i].riW; + if (swdData[i].leW > 0 && swdData[i].riW <= 0) + { + eData[i].weight = 1; + } + else if (swdData[i].leW <= 0 && swdData[i].riW > 0) + { + Inverse (i); + eData[i].weight = 1; + } + else + { + eData[i].weight = 0; + SubEdge (i); + i--; + } + } + } else if ( directed == fill_justDont ) { + for (int i=0;i<numberOfEdges();i++) { + if ( getEdge(i).st < 0 || getEdge(i).en < 0 ) { + SubEdge(i); + i--; + } else { + eData[i].weight = 0; + } + } + } + +// Plot(200.0,200.0,2.0,400.0,400.0,true,true,true,true); + + delete sTree; + sTree = nullptr; + delete sEvts; + sEvts = nullptr; + + MakePointData (false); + MakeEdgeData (false); + MakeSweepSrcData (false); + MakeSweepDestData (false); + a->CleanupSweep (); + type = shape_polygon; + return 0; +} + +// technically it's just a ConvertToShape() on 2 polygons at the same time, and different rules +// for choosing the edges according to their winding numbers. +// probably one of the biggest function i ever wrote. +int +Shape::Booleen (Shape * a, Shape * b, BooleanOp mod,int cutPathID) +{ + if (a == b || a == nullptr || b == nullptr) + return shape_input_err; + Reset (0, 0); + if (a->numberOfPoints() <= 1 || a->numberOfEdges() <= 1) + return 0; + if (b->numberOfPoints() <= 1 || b->numberOfEdges() <= 1) + return 0; + if ( mod == bool_op_cut ) { + } else if ( mod == bool_op_slice ) { + } else { + if (a->type != shape_polygon) + return shape_input_err; + if (b->type != shape_polygon) + return shape_input_err; + } + + a->ResetSweep (); + b->ResetSweep (); + + if (sTree == nullptr) { + sTree = new SweepTreeList(a->numberOfEdges() + b->numberOfEdges()); + } + if (sEvts == nullptr) { + sEvts = new SweepEventQueue(a->numberOfEdges() + b->numberOfEdges()); + } + + MakePointData (true); + MakeEdgeData (true); + MakeSweepSrcData (true); + MakeSweepDestData (true); + if (a->hasBackData () && b->hasBackData ()) + { + MakeBackData (true); + } + else + { + MakeBackData (false); + } + + a->initialisePointData(); + b->initialisePointData(); + + a->initialiseEdgeData(); + b->initialiseEdgeData(); + + a->SortPointsRounded (); + b->SortPointsRounded (); + + chgts.clear(); + + double lastChange = + (a->pData[0].rx[1] < + b->pData[0].rx[1]) ? a->pData[0].rx[1] - 1.0 : b->pData[0].rx[1] - 1.0; + int lastChgtPt = 0; + int edgeHead = -1; + Shape *shapeHead = nullptr; + + clearIncidenceData(); + + int curAPt = 0; + int curBPt = 0; + + while (curAPt < a->numberOfPoints() || curBPt < b->numberOfPoints() || sEvts->size() > 0) + { +/* for (int i=0;i<sEvts.nbEvt;i++) { + printf("%f %f %i %i\n",sEvts.events[i].posx,sEvts.events[i].posy,sEvts.events[i].leftSweep->bord,sEvts.events[i].rightSweep->bord); // localizing ok + } + // cout << endl; + if ( sTree.racine ) { + SweepTree* ct=static_cast <SweepTree*> (sTree.racine->Leftmost()); + while ( ct ) { + printf("%i %i [%i\n",ct->bord,ct->startPoint,(ct->src==a)?1:0); + ct=static_cast <SweepTree*> (ct->elem[RIGHT]); + } + } + printf("\n");*/ + + Geom::Point ptX; + double ptL, ptR; + SweepTree *intersL = nullptr; + SweepTree *intersR = nullptr; + int nPt = -1; + Shape *ptSh = nullptr; + bool isIntersection = false; + + if (sEvts->peek(intersL, intersR, ptX, ptL, ptR)) + { + if (curAPt < a->numberOfPoints()) + { + if (curBPt < b->numberOfPoints()) + { + if (a->pData[curAPt].rx[1] < b->pData[curBPt].rx[1] + || (a->pData[curAPt].rx[1] == b->pData[curBPt].rx[1] + && a->pData[curAPt].rx[0] < b->pData[curBPt].rx[0])) + { + if (a->pData[curAPt].pending > 0 + || (a->pData[curAPt].rx[1] > ptX[1] + || (a->pData[curAPt].rx[1] == ptX[1] + && a->pData[curAPt].rx[0] > ptX[0]))) + { + /* FIXME: could be pop? */ + sEvts->extract(intersL, intersR, ptX, ptL, ptR); + isIntersection = true; + } + else + { + nPt = curAPt++; + ptSh = a; + ptX = ptSh->pData[nPt].rx; + isIntersection = false; + } + } + else + { + if (b->pData[curBPt].pending > 0 + || (b->pData[curBPt].rx[1] > ptX[1] + || (b->pData[curBPt].rx[1] == ptX[1] + && b->pData[curBPt].rx[0] > ptX[0]))) + { + /* FIXME: could be pop? */ + sEvts->extract(intersL, intersR, ptX, ptL, ptR); + isIntersection = true; + } + else + { + nPt = curBPt++; + ptSh = b; + ptX = ptSh->pData[nPt].rx; + isIntersection = false; + } + } + } + else + { + if (a->pData[curAPt].pending > 0 + || (a->pData[curAPt].rx[1] > ptX[1] + || (a->pData[curAPt].rx[1] == ptX[1] + && a->pData[curAPt].rx[0] > ptX[0]))) + { + /* FIXME: could be pop? */ + sEvts->extract(intersL, intersR, ptX, ptL, ptR); + isIntersection = true; + } + else + { + nPt = curAPt++; + ptSh = a; + ptX = ptSh->pData[nPt].rx; + isIntersection = false; + } + } + } + else + { + if (b->pData[curBPt].pending > 0 + || (b->pData[curBPt].rx[1] > ptX[1] + || (b->pData[curBPt].rx[1] == ptX[1] + && b->pData[curBPt].rx[0] > ptX[0]))) + { + /* FIXME: could be pop? */ + sEvts->extract(intersL, intersR, ptX, ptL, ptR); + isIntersection = true; + } + else + { + nPt = curBPt++; + ptSh = b; + ptX = ptSh->pData[nPt].rx; + isIntersection = false; + } + } + } + else + { + if (curAPt < a->numberOfPoints()) + { + if (curBPt < b->numberOfPoints()) + { + if (a->pData[curAPt].rx[1] < b->pData[curBPt].rx[1] + || (a->pData[curAPt].rx[1] == b->pData[curBPt].rx[1] + && a->pData[curAPt].rx[0] < b->pData[curBPt].rx[0])) + { + nPt = curAPt++; + ptSh = a; + } + else + { + nPt = curBPt++; + ptSh = b; + } + } + else + { + nPt = curAPt++; + ptSh = a; + } + } + else + { + nPt = curBPt++; + ptSh = b; + } + ptX = ptSh->pData[nPt].rx; + isIntersection = false; + } + + if (isIntersection == false) + { + if (ptSh->getPoint(nPt).dI == 0 && ptSh->getPoint(nPt).dO == 0) + continue; + } + + Geom::Point rPtX; + rPtX[0]= Round (ptX[0]); + rPtX[1]= Round (ptX[1]); + int lastPointNo = AddPoint (rPtX); + pData[lastPointNo].rx = rPtX; + + if (rPtX[1] > lastChange) + { + int lastI = AssemblePoints (lastChgtPt, lastPointNo); + + + Shape *curSh = shapeHead; + int curBo = edgeHead; + while (curSh) + { + curSh->swsData[curBo].leftRnd = + pData[curSh->swsData[curBo].leftRnd].newInd; + curSh->swsData[curBo].rightRnd = + pData[curSh->swsData[curBo].rightRnd].newInd; + + Shape *neSh = curSh->swsData[curBo].nextSh; + curBo = curSh->swsData[curBo].nextBo; + curSh = neSh; + } + + for (auto & chgt : chgts) + { + chgt.ptNo = pData[chgt.ptNo].newInd; + if (chgt.type == 0) + { + if (chgt.src->getEdge(chgt.bord).st < + chgt.src->getEdge(chgt.bord).en) + { + chgt.src->swsData[chgt.bord].stPt = + chgt.ptNo; + } + else + { + chgt.src->swsData[chgt.bord].enPt = + chgt.ptNo; + } + } + else if (chgt.type == 1) + { + if (chgt.src->getEdge(chgt.bord).st > + chgt.src->getEdge(chgt.bord).en) + { + chgt.src->swsData[chgt.bord].stPt = + chgt.ptNo; + } + else + { + chgt.src->swsData[chgt.bord].enPt = + chgt.ptNo; + } + } + } + + CheckAdjacencies (lastI, lastChgtPt, shapeHead, edgeHead); + + CheckEdges (lastI, lastChgtPt, a, b, mod); + + for (int i = lastChgtPt; i < lastI; i++) + { + if (pData[i].askForWindingS) + { + Shape *windS = pData[i].askForWindingS; + int windB = pData[i].askForWindingB; + pData[i].nextLinkedPoint = + windS->swsData[windB].firstLinkedPoint; + windS->swsData[windB].firstLinkedPoint = i; + } + } + + if (lastI < lastPointNo) + { + _pts[lastI] = getPoint(lastPointNo); + pData[lastI] = pData[lastPointNo]; + } + lastPointNo = lastI; + _pts.resize(lastI + 1); + + lastChgtPt = lastPointNo; + lastChange = rPtX[1]; + chgts.clear(); + edgeHead = -1; + shapeHead = nullptr; + } + + + if (isIntersection) + { + // les 2 events de part et d'autre de l'intersection + // (celui de l'intersection a deja ete depile) + intersL->RemoveEvent (*sEvts, LEFT); + intersR->RemoveEvent (*sEvts, RIGHT); + + AddChgt (lastPointNo, lastChgtPt, shapeHead, edgeHead, INTERSECTION, + intersL->src, intersL->bord, intersR->src, intersR->bord); + + intersL->SwapWithRight (*sTree, *sEvts); + + TesteIntersection (intersL, LEFT, true); + TesteIntersection (intersR, RIGHT, true); + } + else + { + int cb; + + int nbUp = 0, nbDn = 0; + int upNo = -1, dnNo = -1; + cb = ptSh->getPoint(nPt).incidentEdge[FIRST]; + while (cb >= 0 && cb < ptSh->numberOfEdges()) + { + if ((ptSh->getEdge(cb).st < ptSh->getEdge(cb).en + && nPt == ptSh->getEdge(cb).en) + || (ptSh->getEdge(cb).st > ptSh->getEdge(cb).en + && nPt == ptSh->getEdge(cb).st)) + { + upNo = cb; + nbUp++; + } + if ((ptSh->getEdge(cb).st > ptSh->getEdge(cb).en + && nPt == ptSh->getEdge(cb).en) + || (ptSh->getEdge(cb).st < ptSh->getEdge(cb).en + && nPt == ptSh->getEdge(cb).st)) + { + dnNo = cb; + nbDn++; + } + cb = ptSh->NextAt (nPt, cb); + } + + if (nbDn <= 0) + { + upNo = -1; + } + if (upNo >= 0 && (SweepTree *) ptSh->swsData[upNo].misc == nullptr) + { + upNo = -1; + } + +// upNo=-1; + + bool doWinding = true; + + if (nbUp > 0) + { + cb = ptSh->getPoint(nPt).incidentEdge[FIRST]; + while (cb >= 0 && cb < ptSh->numberOfEdges()) + { + if ((ptSh->getEdge(cb).st < ptSh->getEdge(cb).en + && nPt == ptSh->getEdge(cb).en) + || (ptSh->getEdge(cb).st > ptSh->getEdge(cb).en + && nPt == ptSh->getEdge(cb).st)) + { + if (cb != upNo) + { + SweepTree *node = + (SweepTree *) ptSh->swsData[cb].misc; + if (node == nullptr) + { + } + else + { + AddChgt (lastPointNo, lastChgtPt, shapeHead, + edgeHead, EDGE_REMOVED, node->src, node->bord, + nullptr, -1); + ptSh->swsData[cb].misc = nullptr; + + int onLeftB = -1, onRightB = -1; + Shape *onLeftS = nullptr; + Shape *onRightS = nullptr; + if (node->elem[LEFT]) + { + onLeftB = + (static_cast < + SweepTree * >(node->elem[LEFT]))->bord; + onLeftS = + (static_cast < + SweepTree * >(node->elem[LEFT]))->src; + } + if (node->elem[RIGHT]) + { + onRightB = + (static_cast < + SweepTree * >(node->elem[RIGHT]))->bord; + onRightS = + (static_cast < + SweepTree * >(node->elem[RIGHT]))->src; + } + + node->Remove (*sTree, *sEvts, true); + if (onLeftS && onRightS) + { + SweepTree *onLeft = + (SweepTree *) onLeftS->swsData[onLeftB]. + misc; +// SweepTree* onRight=(SweepTree*)onRightS->swsData[onRightB].misc; + if (onLeftS == ptSh + && (onLeftS->getEdge(onLeftB).en == nPt + || onLeftS->getEdge(onLeftB).st == + nPt)) + { + } + else + { + if (onRightS == ptSh + && (onRightS->getEdge(onRightB).en == + nPt + || onRightS->getEdge(onRightB). + st == nPt)) + { + } + else + { + TesteIntersection (onLeft, RIGHT, true); + } + } + } + } + } + } + cb = ptSh->NextAt (nPt, cb); + } + } + + // traitement du "upNo devient dnNo" + SweepTree *insertionNode = nullptr; + if (dnNo >= 0) + { + if (upNo >= 0) + { + SweepTree *node = (SweepTree *) ptSh->swsData[upNo].misc; + + AddChgt (lastPointNo, lastChgtPt, shapeHead, edgeHead, EDGE_REMOVED, + node->src, node->bord, nullptr, -1); + + ptSh->swsData[upNo].misc = nullptr; + + node->RemoveEvents (*sEvts); + node->ConvertTo (ptSh, dnNo, 1, lastPointNo); + ptSh->swsData[dnNo].misc = node; + TesteIntersection (node, RIGHT, true); + TesteIntersection (node, LEFT, true); + insertionNode = node; + + ptSh->swsData[dnNo].curPoint = lastPointNo; + + AddChgt (lastPointNo, lastChgtPt, shapeHead, edgeHead, EDGE_INSERTED, + node->src, node->bord, nullptr, -1); + } + else + { + SweepTree *node = sTree->add(ptSh, dnNo, 1, lastPointNo, this); + ptSh->swsData[dnNo].misc = node; + node->Insert (*sTree, *sEvts, this, lastPointNo, true); + + if (doWinding) + { + SweepTree *myLeft = + static_cast < SweepTree * >(node->elem[LEFT]); + if (myLeft) + { + pData[lastPointNo].askForWindingS = myLeft->src; + pData[lastPointNo].askForWindingB = myLeft->bord; + } + else + { + pData[lastPointNo].askForWindingB = -1; + } + doWinding = false; + } + + TesteIntersection (node, RIGHT, true); + TesteIntersection (node, LEFT, true); + insertionNode = node; + + ptSh->swsData[dnNo].curPoint = lastPointNo; + + AddChgt (lastPointNo, lastChgtPt, shapeHead, edgeHead, EDGE_INSERTED, + node->src, node->bord, nullptr, -1); + } + } + + if (nbDn > 1) + { // si nbDn == 1 , alors dnNo a deja ete traite + cb = ptSh->getPoint(nPt).incidentEdge[FIRST]; + while (cb >= 0 && cb < ptSh->numberOfEdges()) + { + if ((ptSh->getEdge(cb).st > ptSh->getEdge(cb).en + && nPt == ptSh->getEdge(cb).en) + || (ptSh->getEdge(cb).st < ptSh->getEdge(cb).en + && nPt == ptSh->getEdge(cb).st)) + { + if (cb != dnNo) + { + SweepTree *node = sTree->add(ptSh, cb, 1, lastPointNo, this); + ptSh->swsData[cb].misc = node; +// node->Insert(sTree,*sEvts,this,lastPointNo,true); + node->InsertAt (*sTree, *sEvts, this, insertionNode, + nPt, true); + + if (doWinding) + { + SweepTree *myLeft = + static_cast < SweepTree * >(node->elem[LEFT]); + if (myLeft) + { + pData[lastPointNo].askForWindingS = + myLeft->src; + pData[lastPointNo].askForWindingB = + myLeft->bord; + } + else + { + pData[lastPointNo].askForWindingB = -1; + } + doWinding = false; + } + + TesteIntersection (node, RIGHT, true); + TesteIntersection (node, LEFT, true); + + ptSh->swsData[cb].curPoint = lastPointNo; + + AddChgt (lastPointNo, lastChgtPt, shapeHead, + edgeHead, EDGE_INSERTED, node->src, node->bord, nullptr, + -1); + } + } + cb = ptSh->NextAt (nPt, cb); + } + } + } + } + { + int lastI = AssemblePoints (lastChgtPt, numberOfPoints()); + + + Shape *curSh = shapeHead; + int curBo = edgeHead; + while (curSh) + { + curSh->swsData[curBo].leftRnd = + pData[curSh->swsData[curBo].leftRnd].newInd; + curSh->swsData[curBo].rightRnd = + pData[curSh->swsData[curBo].rightRnd].newInd; + + Shape *neSh = curSh->swsData[curBo].nextSh; + curBo = curSh->swsData[curBo].nextBo; + curSh = neSh; + } + + /* FIXME: this kind of code seems to appear frequently */ + for (auto & chgt : chgts) + { + chgt.ptNo = pData[chgt.ptNo].newInd; + if (chgt.type == 0) + { + if (chgt.src->getEdge(chgt.bord).st < + chgt.src->getEdge(chgt.bord).en) + { + chgt.src->swsData[chgt.bord].stPt = chgt.ptNo; + } + else + { + chgt.src->swsData[chgt.bord].enPt = chgt.ptNo; + } + } + else if (chgt.type == 1) + { + if (chgt.src->getEdge(chgt.bord).st > + chgt.src->getEdge(chgt.bord).en) + { + chgt.src->swsData[chgt.bord].stPt = chgt.ptNo; + } + else + { + chgt.src->swsData[chgt.bord].enPt = chgt.ptNo; + } + } + } + + CheckAdjacencies (lastI, lastChgtPt, shapeHead, edgeHead); + + CheckEdges (lastI, lastChgtPt, a, b, mod); + + for (int i = lastChgtPt; i < lastI; i++) + { + if (pData[i].askForWindingS) + { + Shape *windS = pData[i].askForWindingS; + int windB = pData[i].askForWindingB; + pData[i].nextLinkedPoint = windS->swsData[windB].firstLinkedPoint; + windS->swsData[windB].firstLinkedPoint = i; + } + } + + _pts.resize(lastI); + + edgeHead = -1; + shapeHead = nullptr; + } + + chgts.clear(); + clearIncidenceData(); + +// Plot(190,70,6,400,400,true,false,true,true); + + if ( mod == bool_op_cut ) { + AssembleAretes (fill_justDont); + // dupliquer les aretes de la coupure + int i=numberOfEdges()-1; + for (;i>=0;i--) { + if ( ebData[i].pathID == cutPathID ) { + // on duplique + int nEd=AddEdge(getEdge(i).en,getEdge(i).st); + ebData[nEd].pathID=cutPathID; + ebData[nEd].pieceID=ebData[i].pieceID; + ebData[nEd].tSt=ebData[i].tEn; + ebData[nEd].tEn=ebData[i].tSt; + eData[nEd].weight=eData[i].weight; + // lui donner les firstlinkedpoitn si besoin + if ( getEdge(i).en >= getEdge(i).st ) { + int cp = swsData[i].firstLinkedPoint; + while (cp >= 0) { + pData[cp].askForWindingB = nEd; + cp = pData[cp].nextLinkedPoint; + } + swsData[nEd].firstLinkedPoint = swsData[i].firstLinkedPoint; + swsData[i].firstLinkedPoint=-1; + } + } + } + } else if ( mod == bool_op_slice ) { + } else { + AssembleAretes (); + } + + for (int i = 0; i < numberOfPoints(); i++) + { + _pts[i].oldDegree = getPoint(i).totalDegree(); + } + + _need_edges_sorting = true; + if ( mod == bool_op_slice ) { + } else { + GetWindings (a, b, mod, false); + } +// Plot(190,70,6,400,400,true,true,true,true); + + if (mod == bool_op_symdiff) + { + for (int i = 0; i < numberOfEdges(); i++) + { + if (swdData[i].leW < 0) + swdData[i].leW = -swdData[i].leW; + if (swdData[i].riW < 0) + swdData[i].riW = -swdData[i].riW; + + if (swdData[i].leW > 0 && swdData[i].riW <= 0) + { + eData[i].weight = 1; + } + else if (swdData[i].leW <= 0 && swdData[i].riW > 0) + { + Inverse (i); + eData[i].weight = 1; + } + else + { + eData[i].weight = 0; + SubEdge (i); + i--; + } + } + } + else if (mod == bool_op_union || mod == bool_op_diff) + { + for (int i = 0; i < numberOfEdges(); i++) + { + if (swdData[i].leW > 0 && swdData[i].riW <= 0) + { + eData[i].weight = 1; + } + else if (swdData[i].leW <= 0 && swdData[i].riW > 0) + { + Inverse (i); + eData[i].weight = 1; + } + else + { + eData[i].weight = 0; + SubEdge (i); + i--; + } + } + } + else if (mod == bool_op_inters) + { + for (int i = 0; i < numberOfEdges(); i++) + { + if (swdData[i].leW > 1 && swdData[i].riW <= 1) + { + eData[i].weight = 1; + } + else if (swdData[i].leW <= 1 && swdData[i].riW > 1) + { + Inverse (i); + eData[i].weight = 1; + } + else + { + eData[i].weight = 0; + SubEdge (i); + i--; + } + } + } else if ( mod == bool_op_cut ) { + // inverser les aretes de la coupe au besoin + for (int i=0;i<numberOfEdges();i++) { + if ( getEdge(i).st < 0 || getEdge(i).en < 0 ) { + if ( i < numberOfEdges()-1 ) { + // decaler les askForWinding + int cp = swsData[numberOfEdges()-1].firstLinkedPoint; + while (cp >= 0) { + pData[cp].askForWindingB = i; + cp = pData[cp].nextLinkedPoint; + } + } + SwapEdges(i,numberOfEdges()-1); + SubEdge(numberOfEdges()-1); +// SubEdge(i); + i--; + } else if ( ebData[i].pathID == cutPathID ) { + swdData[i].leW=swdData[i].leW%2; + swdData[i].riW=swdData[i].riW%2; + if ( swdData[i].leW < swdData[i].riW ) { + Inverse(i); + } + } + } + } else if ( mod == bool_op_slice ) { + // supprimer les aretes de la coupe + int i=numberOfEdges()-1; + for (;i>=0;i--) { + if ( ebData[i].pathID == cutPathID || getEdge(i).st < 0 || getEdge(i).en < 0 ) { + SubEdge(i); + } + } + } + else + { + for (int i = 0; i < numberOfEdges(); i++) + { + if (swdData[i].leW > 0 && swdData[i].riW <= 0) + { + eData[i].weight = 1; + } + else if (swdData[i].leW <= 0 && swdData[i].riW > 0) + { + Inverse (i); + eData[i].weight = 1; + } + else + { + eData[i].weight = 0; + SubEdge (i); + i--; + } + } + } + + delete sTree; + sTree = nullptr; + delete sEvts; + sEvts = nullptr; + + if ( mod == bool_op_cut ) { + // on garde le askForWinding + } else { + MakePointData (false); + } + MakeEdgeData (false); + MakeSweepSrcData (false); + MakeSweepDestData (false); + a->CleanupSweep (); + b->CleanupSweep (); + + if (directedEulerian(this) == false) + { +// printf( "pas euclidian2"); + _pts.clear(); + _aretes.clear(); + return shape_euler_err; + } + type = shape_polygon; + return 0; +} + +// frontend to the TesteIntersection() below +void Shape::TesteIntersection(SweepTree *t, Side s, bool onlyDiff) +{ + SweepTree *tt = static_cast<SweepTree*>(t->elem[s]); + if (tt == nullptr) { + return; + } + + SweepTree *a = (s == LEFT) ? tt : t; + SweepTree *b = (s == LEFT) ? t : tt; + + Geom::Point atx; + double atl; + double atr; + if (TesteIntersection(a, b, atx, atl, atr, onlyDiff)) { + sEvts->add(a, b, atx, atl, atr); + } +} + +// a crucial piece of code: computing intersections between segments +bool +Shape::TesteIntersection (SweepTree * iL, SweepTree * iR, Geom::Point &atx, double &atL, double &atR, bool onlyDiff) +{ + int lSt = iL->src->getEdge(iL->bord).st, lEn = iL->src->getEdge(iL->bord).en; + int rSt = iR->src->getEdge(iR->bord).st, rEn = iR->src->getEdge(iR->bord).en; + Geom::Point ldir, rdir; + ldir = iL->src->eData[iL->bord].rdx; + rdir = iR->src->eData[iR->bord].rdx; + // first, a round of checks to quickly dismiss edge which obviously dont intersect, + // such as having disjoint bounding boxes + if (lSt < lEn) + { + } + else + { + int swap = lSt; + lSt = lEn; + lEn = swap; + ldir = -ldir; + } + if (rSt < rEn) + { + } + else + { + int swap = rSt; + rSt = rEn; + rEn = swap; + rdir = -rdir; + } + + if (iL->src->pData[lSt].rx[0] < iL->src->pData[lEn].rx[0]) + { + if (iR->src->pData[rSt].rx[0] < iR->src->pData[rEn].rx[0]) + { + if (iL->src->pData[lSt].rx[0] > iR->src->pData[rEn].rx[0]) + return false; + if (iL->src->pData[lEn].rx[0] < iR->src->pData[rSt].rx[0]) + return false; + } + else + { + if (iL->src->pData[lSt].rx[0] > iR->src->pData[rSt].rx[0]) + return false; + if (iL->src->pData[lEn].rx[0] < iR->src->pData[rEn].rx[0]) + return false; + } + } + else + { + if (iR->src->pData[rSt].rx[0] < iR->src->pData[rEn].rx[0]) + { + if (iL->src->pData[lEn].rx[0] > iR->src->pData[rEn].rx[0]) + return false; + if (iL->src->pData[lSt].rx[0] < iR->src->pData[rSt].rx[0]) + return false; + } + else + { + if (iL->src->pData[lEn].rx[0] > iR->src->pData[rSt].rx[0]) + return false; + if (iL->src->pData[lSt].rx[0] < iR->src->pData[rEn].rx[0]) + return false; + } + } + + double ang = cross (ldir, rdir); +// ang*=iL->src->eData[iL->bord].isqlength; +// ang*=iR->src->eData[iR->bord].isqlength; + if (ang <= 0) return false; // edges in opposite directions: <-left ... right -> + // they can't intersect + + // d'abord tester les bords qui partent d'un meme point + if (iL->src == iR->src && lSt == rSt) + { + if (iL->src == iR->src && lEn == rEn) + return false; // c'est juste un doublon + atx = iL->src->pData[lSt].rx; + atR = atL = -1; + return true; // l'ordre est mauvais + } + if (iL->src == iR->src && lEn == rEn) + return false; // rien a faire=ils vont terminer au meme endroit + + // tester si on est dans une intersection multiple + + if (onlyDiff && iL->src == iR->src) + return false; + + // on reprend les vrais points + lSt = iL->src->getEdge(iL->bord).st; + lEn = iL->src->getEdge(iL->bord).en; + rSt = iR->src->getEdge(iR->bord).st; + rEn = iR->src->getEdge(iR->bord).en; + + // compute intersection (if there is one) + // Boissonat anr Preparata said in one paper that double precision floats were sufficient for get single precision + // coordinates for the intersection, if the endpoints are single precision. i hope they're right... + { + Geom::Point sDiff, eDiff; + double slDot, elDot; + double srDot, erDot; + sDiff = iL->src->pData[lSt].rx - iR->src->pData[rSt].rx; + eDiff = iL->src->pData[lEn].rx - iR->src->pData[rSt].rx; + srDot = cross(rdir, sDiff); + erDot = cross(rdir, eDiff); + sDiff = iR->src->pData[rSt].rx - iL->src->pData[lSt].rx; + eDiff = iR->src->pData[rEn].rx - iL->src->pData[lSt].rx; + slDot = cross(ldir, sDiff); + elDot = cross(ldir, eDiff); + + if ((srDot >= 0 && erDot >= 0) || (srDot <= 0 && erDot <= 0)) + { + if (srDot == 0) + { + if (lSt < lEn) + { + atx = iL->src->pData[lSt].rx; + atL = 0; + atR = slDot / (slDot - elDot); + return true; + } + else + { + return false; + } + } + else if (erDot == 0) + { + if (lSt > lEn) + { + atx = iL->src->pData[lEn].rx; + atL = 1; + atR = slDot / (slDot - elDot); + return true; + } + else + { + return false; + } + } + if (srDot > 0 && erDot > 0) + { + if (rEn < rSt) + { + if (srDot < erDot) + { + if (lSt < lEn) + { + atx = iL->src->pData[lSt].rx; + atL = 0; + atR = slDot / (slDot - elDot); + return true; + } + } + else + { + if (lEn < lSt) + { + atx = iL->src->pData[lEn].rx; + atL = 1; + atR = slDot / (slDot - elDot); + return true; + } + } + } + } + if (srDot < 0 && erDot < 0) + { + if (rEn > rSt) + { + if (srDot > erDot) + { + if (lSt < lEn) + { + atx = iL->src->pData[lSt].rx; + atL = 0; + atR = slDot / (slDot - elDot); + return true; + } + } + else + { + if (lEn < lSt) + { + atx = iL->src->pData[lEn].rx; + atL = 1; + atR = slDot / (slDot - elDot); + return true; + } + } + } + } + return false; + } + if ((slDot >= 0 && elDot >= 0) || (slDot <= 0 && elDot <= 0)) + { + if (slDot == 0) + { + if (rSt < rEn) + { + atx = iR->src->pData[rSt].rx; + atR = 0; + atL = srDot / (srDot - erDot); + return true; + } + else + { + return false; + } + } + else if (elDot == 0) + { + if (rSt > rEn) + { + atx = iR->src->pData[rEn].rx; + atR = 1; + atL = srDot / (srDot - erDot); + return true; + } + else + { + return false; + } + } + if (slDot > 0 && elDot > 0) + { + if (lEn > lSt) + { + if (slDot < elDot) + { + if (rSt < rEn) + { + atx = iR->src->pData[rSt].rx; + atR = 0; + atL = srDot / (srDot - erDot); + return true; + } + } + else + { + if (rEn < rSt) + { + atx = iR->src->pData[rEn].rx; + atR = 1; + atL = srDot / (srDot - erDot); + return true; + } + } + } + } + if (slDot < 0 && elDot < 0) + { + if (lEn < lSt) + { + if (slDot > elDot) + { + if (rSt < rEn) + { + atx = iR->src->pData[rSt].rx; + atR = 0; + atL = srDot / (srDot - erDot); + return true; + } + } + else + { + if (rEn < rSt) + { + atx = iR->src->pData[rEn].rx; + atR = 1; + atL = srDot / (srDot - erDot); + return true; + } + } + } + } + return false; + } + +/* double slb=slDot-elDot,srb=srDot-erDot; + if ( slb < 0 ) slb=-slb; + if ( srb < 0 ) srb=-srb;*/ + if (iL->src->eData[iL->bord].siEd > iR->src->eData[iR->bord].siEd) + { + atx = + (slDot * iR->src->pData[rEn].rx - + elDot * iR->src->pData[rSt].rx) / (slDot - elDot); + } + else + { + atx = + (srDot * iL->src->pData[lEn].rx - + erDot * iL->src->pData[lSt].rx) / (srDot - erDot); + } + atL = srDot / (srDot - erDot); + atR = slDot / (slDot - elDot); + return true; + } + + return true; +} + +int +Shape::PushIncidence (Shape * a, int cb, int pt, double theta) +{ + if (theta < 0 || theta > 1) + return -1; + + if (nbInc >= maxInc) + { + maxInc = 2 * nbInc + 1; + iData = + (incidenceData *) g_realloc(iData, maxInc * sizeof (incidenceData)); + } + int n = nbInc++; + iData[n].nextInc = a->swsData[cb].firstLinkedPoint; + iData[n].pt = pt; + iData[n].theta = theta; + a->swsData[cb].firstLinkedPoint = n; + return n; +} + +int +Shape::CreateIncidence (Shape * a, int no, int nPt) +{ + Geom::Point adir, diff; + adir = a->eData[no].rdx; + diff = getPoint(nPt).x - a->pData[a->getEdge(no).st].rx; + double t = dot (diff, adir); + t *= a->eData[no].ilength; + return PushIncidence (a, no, nPt, t); +} + +int +Shape::Winding (int nPt) const +{ + int askTo = pData[nPt].askForWindingB; + if (askTo < 0 || askTo >= numberOfEdges()) + return 0; + if (getEdge(askTo).st < getEdge(askTo).en) + { + return swdData[askTo].leW; + } + else + { + return swdData[askTo].riW; + } + return 0; +} + +int +Shape::Winding (const Geom::Point px) const +{ + int lr = 0, ll = 0, rr = 0; + + for (int i = 0; i < numberOfEdges(); i++) + { + Geom::Point adir, diff, ast, aen; + adir = eData[i].rdx; + + ast = pData[getEdge(i).st].rx; + aen = pData[getEdge(i).en].rx; + + int nWeight = eData[i].weight; + + if (ast[0] < aen[0]) + { + if (ast[0] > px[0]) + continue; + if (aen[0] < px[0]) + continue; + } + else + { + if (ast[0] < px[0]) + continue; + if (aen[0] > px[0]) + continue; + } + if (ast[0] == px[0]) + { + if (ast[1] >= px[1]) + continue; + if (aen[0] == px[0]) + continue; + if (aen[0] < px[0]) + ll += nWeight; + else + rr -= nWeight; + continue; + } + if (aen[0] == px[0]) + { + if (aen[1] >= px[1]) + continue; + if (ast[0] == px[0]) + continue; + if (ast[0] < px[0]) + ll -= nWeight; + else + rr += nWeight; + continue; + } + + if (ast[1] < aen[1]) + { + if (ast[1] >= px[1]) + continue; + } + else + { + if (aen[1] >= px[1]) + continue; + } + + diff = px - ast; + double cote = cross(adir, diff); + if (cote == 0) + continue; + if (cote < 0) + { + if (ast[0] > px[0]) + lr += nWeight; + } + else + { + if (ast[0] < px[0]) + lr -= nWeight; + } + } + return lr + (ll + rr) / 2; +} + +// merging duplicate points and edges +int +Shape::AssemblePoints (int st, int en) +{ + if (en > st) { + for (int i = st; i < en; i++) pData[i].oldInd = i; +// SortPoints(st,en-1); + SortPointsByOldInd (st, en - 1); // SortPointsByOldInd() is required here, because of the edges we have + // associated with the point for later computation of winding numbers. + // specifically, we need the first point we treated, it's the only one with a valid + // associated edge (man, that was a nice bug). + for (int i = st; i < en; i++) pData[pData[i].oldInd].newInd = i; + + int lastI = st; + for (int i = st; i < en; i++) { + pData[i].pending = lastI++; + if (i > st && getPoint(i - 1).x[0] == getPoint(i).x[0] && getPoint(i - 1).x[1] == getPoint(i).x[1]) { + pData[i].pending = pData[i - 1].pending; + if (pData[pData[i].pending].askForWindingS == nullptr) { + pData[pData[i].pending].askForWindingS = pData[i].askForWindingS; + pData[pData[i].pending].askForWindingB = pData[i].askForWindingB; + } else { + if (pData[pData[i].pending].askForWindingS == pData[i].askForWindingS + && pData[pData[i].pending].askForWindingB == pData[i].askForWindingB) { + // meme bord, c bon + } else { + // meme point, mais pas le meme bord: ouille! + // il faut prendre le bord le plus a gauche + // en pratique, n'arrive que si 2 maxima sont dans la meme case -> le mauvais choix prend une arete incidente + // au bon choix +// printf("doh"); + } + } + lastI--; + } else { + if (i > pData[i].pending) { + _pts[pData[i].pending].x = getPoint(i).x; + pData[pData[i].pending].rx = getPoint(i).x; + pData[pData[i].pending].askForWindingS = pData[i].askForWindingS; + pData[pData[i].pending].askForWindingB = pData[i].askForWindingB; + } + } + } + for (int i = st; i < en; i++) pData[i].newInd = pData[pData[i].newInd].pending; + return lastI; + } + return en; +} + +void +Shape::AssemblePoints (Shape * a) +{ + if (hasPoints()) + { + int lastI = AssemblePoints (0, numberOfPoints()); + + for (int i = 0; i < a->numberOfEdges(); i++) + { + a->swsData[i].stPt = pData[a->swsData[i].stPt].newInd; + a->swsData[i].enPt = pData[a->swsData[i].enPt].newInd; + } + for (int i = 0; i < nbInc; i++) + iData[i].pt = pData[iData[i].pt].newInd; + + _pts.resize(lastI); + } +} +void +Shape::AssembleAretes (FillRule directed) +{ + if ( directed == fill_justDont && _has_back_data == false ) { + directed=fill_nonZero; + } + + for (int i = 0; i < numberOfPoints(); i++) { + if (getPoint(i).totalDegree() == 2) { + int cb, cc; + cb = getPoint(i).incidentEdge[FIRST]; + cc = getPoint(i).incidentEdge[LAST]; + bool doublon=false; + if ((getEdge(cb).st == getEdge(cc).st && getEdge(cb).en == getEdge(cc).en) + || (getEdge(cb).st == getEdge(cc).en && getEdge(cb).en == getEdge(cc).en)) doublon=true; + if ( directed == fill_justDont ) { + if ( doublon ) { + if ( ebData[cb].pathID > ebData[cc].pathID ) { + cc = getPoint(i).incidentEdge[FIRST]; // on swappe pour enlever cc + cb = getPoint(i).incidentEdge[LAST]; + } else if ( ebData[cb].pathID == ebData[cc].pathID ) { + if ( ebData[cb].pieceID > ebData[cc].pieceID ) { + cc = getPoint(i).incidentEdge[FIRST]; // on swappe pour enlever cc + cb = getPoint(i).incidentEdge[LAST]; + } else if ( ebData[cb].pieceID == ebData[cc].pieceID ) { + if ( ebData[cb].tSt > ebData[cc].tSt ) { + cc = getPoint(i).incidentEdge[FIRST]; // on swappe pour enlever cc + cb = getPoint(i).incidentEdge[LAST]; + } + } + } + } + if ( doublon ) eData[cc].weight = 0; + } else { + } + if ( doublon ) { + if (getEdge(cb).st == getEdge(cc).st) { + eData[cb].weight += eData[cc].weight; + } else { + eData[cb].weight -= eData[cc].weight; + } + eData[cc].weight = 0; + + if (swsData[cc].firstLinkedPoint >= 0) { + int cp = swsData[cc].firstLinkedPoint; + while (cp >= 0) { + pData[cp].askForWindingB = cb; + cp = pData[cp].nextLinkedPoint; + } + if (swsData[cb].firstLinkedPoint < 0) { + swsData[cb].firstLinkedPoint = swsData[cc].firstLinkedPoint; + } else { + int ncp = swsData[cb].firstLinkedPoint; + while (pData[ncp].nextLinkedPoint >= 0) { + ncp = pData[ncp].nextLinkedPoint; + } + pData[ncp].nextLinkedPoint = swsData[cc].firstLinkedPoint; + } + } + + DisconnectStart (cc); + DisconnectEnd (cc); + if (numberOfEdges() > 1) { + int cp = swsData[numberOfEdges() - 1].firstLinkedPoint; + while (cp >= 0) { + pData[cp].askForWindingB = cc; + cp = pData[cp].nextLinkedPoint; + } + } + SwapEdges (cc, numberOfEdges() - 1); + if (cb == numberOfEdges() - 1) { + cb = cc; + } + _aretes.pop_back(); + } + } else { + int cb; + cb = getPoint(i).incidentEdge[FIRST]; + while (cb >= 0 && cb < numberOfEdges()) { + int other = Other (i, cb); + int cc; + cc = getPoint(i).incidentEdge[FIRST]; + while (cc >= 0 && cc < numberOfEdges()) { + int ncc = NextAt (i, cc); + bool doublon=false; + if (cc != cb && Other (i, cc) == other ) doublon=true; + if ( directed == fill_justDont ) { + if ( doublon ) { + if ( ebData[cb].pathID > ebData[cc].pathID ) { + doublon=false; + } else if ( ebData[cb].pathID == ebData[cc].pathID ) { + if ( ebData[cb].pieceID > ebData[cc].pieceID ) { + doublon=false; + } else if ( ebData[cb].pieceID == ebData[cc].pieceID ) { + if ( ebData[cb].tSt > ebData[cc].tSt ) { + doublon=false; + } + } + } + } + if ( doublon ) eData[cc].weight = 0; + } else { + } + if ( doublon ) { +// if (cc != cb && Other (i, cc) == other) { + // doublon + if (getEdge(cb).st == getEdge(cc).st) { + eData[cb].weight += eData[cc].weight; + } else { + eData[cb].weight -= eData[cc].weight; + } + eData[cc].weight = 0; + + if (swsData[cc].firstLinkedPoint >= 0) { + int cp = swsData[cc].firstLinkedPoint; + while (cp >= 0) { + pData[cp].askForWindingB = cb; + cp = pData[cp].nextLinkedPoint; + } + if (swsData[cb].firstLinkedPoint < 0) { + swsData[cb].firstLinkedPoint = swsData[cc].firstLinkedPoint; + } else { + int ncp = swsData[cb].firstLinkedPoint; + while (pData[ncp].nextLinkedPoint >= 0) { + ncp = pData[ncp].nextLinkedPoint; + } + pData[ncp].nextLinkedPoint = swsData[cc].firstLinkedPoint; + } + } + + DisconnectStart (cc); + DisconnectEnd (cc); + if (numberOfEdges() > 1) { + int cp = swsData[numberOfEdges() - 1].firstLinkedPoint; + while (cp >= 0) { + pData[cp].askForWindingB = cc; + cp = pData[cp].nextLinkedPoint; + } + } + SwapEdges (cc, numberOfEdges() - 1); + if (cb == numberOfEdges() - 1) { + cb = cc; + } + if (ncc == numberOfEdges() - 1) { + ncc = cc; + } + _aretes.pop_back(); + } + cc = ncc; + } + cb = NextAt (i, cb); + } + } + } + + if ( directed == fill_justDont ) { + for (int i = 0; i < numberOfEdges(); i++) { + if (eData[i].weight == 0) { +// SubEdge(i); + // i--; + } else { + if (eData[i].weight < 0) Inverse (i); + } + } + } else { + for (int i = 0; i < numberOfEdges(); i++) { + if (eData[i].weight == 0) { + // SubEdge(i); + // i--; + } else { + if (eData[i].weight < 0) Inverse (i); + } + } + } +} +void +Shape::GetWindings (Shape * /*a*/, Shape * /*b*/, BooleanOp /*mod*/, bool brutal) +{ + // preparation du parcours + for (int i = 0; i < numberOfEdges(); i++) + { + swdData[i].misc = nullptr; + swdData[i].precParc = swdData[i].suivParc = -1; + } + + // chainage + SortEdges (); + + int searchInd = 0; + + int lastPtUsed = 0; + do + { + int startBord = -1; + int outsideW = 0; + { + int fi = 0; + for (fi = lastPtUsed; fi < numberOfPoints(); fi++) + { + if (getPoint(fi).incidentEdge[FIRST] >= 0 && swdData[getPoint(fi).incidentEdge[FIRST]].misc == nullptr) + break; + } + lastPtUsed = fi + 1; + if (fi < numberOfPoints()) + { + int bestB = getPoint(fi).incidentEdge[FIRST]; + if (bestB >= 0) + { + startBord = bestB; + if (fi == 0) + { + outsideW = 0; + } + else + { + if (brutal) + { + outsideW = Winding (getPoint(fi).x); + } + else + { + outsideW = Winding (fi); + } + } + if ( getPoint(fi).totalDegree() == 1 ) { + if ( fi == getEdge(startBord).en ) { + if ( eData[startBord].weight == 0 ) { + // on se contente d'inverser + Inverse(startBord); + } else { + // on passe le askForWinding (sinon ca va rester startBord) + pData[getEdge(startBord).st].askForWindingB=pData[getEdge(startBord).en].askForWindingB; + } + } + } + if (getEdge(startBord).en == fi) + outsideW += eData[startBord].weight; + } + } + } + if (startBord >= 0) + { + // parcours en profondeur pour mettre les leF et riF a leurs valeurs + swdData[startBord].misc = (void *) 1; + swdData[startBord].leW = outsideW; + swdData[startBord].riW = outsideW - eData[startBord].weight; +// if ( doDebug ) printf("part de %d\n",startBord); + int curBord = startBord; + bool curDir = true; + swdData[curBord].precParc = -1; + swdData[curBord].suivParc = -1; + do + { + int cPt; + if (curDir) + cPt = getEdge(curBord).en; + else + cPt = getEdge(curBord).st; + int nb = curBord; +// if ( doDebug ) printf("de curBord= %d avec leF= %d et riF= %d -> ",curBord,swdData[curBord].leW,swdData[curBord].riW); + do + { + int nnb = -1; + if (getEdge(nb).en == cPt) + { + outsideW = swdData[nb].riW; + nnb = CyclePrevAt (cPt, nb); + } + else + { + outsideW = swdData[nb].leW; + nnb = CyclePrevAt (cPt, nb); + } + if (nnb == nb) + { + // cul-de-sac + nb = -1; + break; + } + nb = nnb; + } + while (nb >= 0 && nb != curBord && swdData[nb].misc != nullptr); + if (nb < 0 || nb == curBord) + { + // retour en arriere + int oPt; + if (curDir) + oPt = getEdge(curBord).st; + else + oPt = getEdge(curBord).en; + curBord = swdData[curBord].precParc; +// if ( doDebug ) printf("retour vers %d\n",curBord); + if (curBord < 0) + break; + if (oPt == getEdge(curBord).en) + curDir = true; + else + curDir = false; + } + else + { + swdData[nb].misc = (void *) 1; + swdData[nb].ind = searchInd++; + if (cPt == getEdge(nb).st) + { + swdData[nb].riW = outsideW; + swdData[nb].leW = outsideW + eData[nb].weight; + } + else + { + swdData[nb].leW = outsideW; + swdData[nb].riW = outsideW - eData[nb].weight; + } + swdData[nb].precParc = curBord; + swdData[curBord].suivParc = nb; + curBord = nb; +// if ( doDebug ) printf("suite %d\n",curBord); + if (cPt == getEdge(nb).en) + curDir = false; + else + curDir = true; + } + } + while (true /*swdData[curBord].precParc >= 0 */ ); + // fin du cas non-oriente + } + } + while (lastPtUsed < numberOfPoints()); +// fflush(stdout); +} + +bool +Shape::TesteIntersection (Shape * ils, Shape * irs, int ilb, int irb, + Geom::Point &atx, double &atL, double &atR, + bool /*onlyDiff*/) +{ + int lSt = ils->getEdge(ilb).st, lEn = ils->getEdge(ilb).en; + int rSt = irs->getEdge(irb).st, rEn = irs->getEdge(irb).en; + if (lSt == rSt || lSt == rEn) + { + return false; + } + if (lEn == rSt || lEn == rEn) + { + return false; + } + + Geom::Point ldir, rdir; + ldir = ils->eData[ilb].rdx; + rdir = irs->eData[irb].rdx; + + double il = ils->pData[lSt].rx[0], it = ils->pData[lSt].rx[1], ir = + ils->pData[lEn].rx[0], ib = ils->pData[lEn].rx[1]; + if (il > ir) + { + double swf = il; + il = ir; + ir = swf; + } + if (it > ib) + { + double swf = it; + it = ib; + ib = swf; + } + double jl = irs->pData[rSt].rx[0], jt = irs->pData[rSt].rx[1], jr = + irs->pData[rEn].rx[0], jb = irs->pData[rEn].rx[1]; + if (jl > jr) + { + double swf = jl; + jl = jr; + jr = swf; + } + if (jt > jb) + { + double swf = jt; + jt = jb; + jb = swf; + } + + if (il > jr || it > jb || ir < jl || ib < jt) + return false; + + // pre-test + { + Geom::Point sDiff, eDiff; + double slDot, elDot; + double srDot, erDot; + sDiff = ils->pData[lSt].rx - irs->pData[rSt].rx; + eDiff = ils->pData[lEn].rx - irs->pData[rSt].rx; + srDot = cross(rdir, sDiff); + erDot = cross(rdir, eDiff); + if ((srDot >= 0 && erDot >= 0) || (srDot <= 0 && erDot <= 0)) + return false; + + sDiff = irs->pData[rSt].rx - ils->pData[lSt].rx; + eDiff = irs->pData[rEn].rx - ils->pData[lSt].rx; + slDot = cross(ldir, sDiff); + elDot = cross(ldir, eDiff); + if ((slDot >= 0 && elDot >= 0) || (slDot <= 0 && elDot <= 0)) + return false; + + double slb = slDot - elDot, srb = srDot - erDot; + if (slb < 0) + slb = -slb; + if (srb < 0) + srb = -srb; + if (slb > srb) + { + atx = + (slDot * irs->pData[rEn].rx - elDot * irs->pData[rSt].rx) / (slDot - + elDot); + } + else + { + atx = + (srDot * ils->pData[lEn].rx - erDot * ils->pData[lSt].rx) / (srDot - + erDot); + } + atL = srDot / (srDot - erDot); + atR = slDot / (slDot - elDot); + return true; + } + + // a mettre en double precision pour des resultats exacts + Geom::Point usvs; + usvs = irs->pData[rSt].rx - ils->pData[lSt].rx; + + // pas sur de l'ordre des coefs de m + Geom::Affine m(ldir[0], ldir[1], + rdir[0], rdir[1], + 0, 0); + double det = m.det(); + + double tdet = det * ils->eData[ilb].isqlength * irs->eData[irb].isqlength; + + if (tdet > -0.0001 && tdet < 0.0001) + { // ces couillons de vecteurs sont colineaires + Geom::Point sDiff, eDiff; + double sDot, eDot; + sDiff = ils->pData[lSt].rx - irs->pData[rSt].rx; + eDiff = ils->pData[lEn].rx - irs->pData[rSt].rx; + sDot = cross(rdir, sDiff); + eDot = cross(rdir, eDiff); + + atx = + (sDot * irs->pData[lEn].rx - eDot * irs->pData[lSt].rx) / (sDot - + eDot); + atL = sDot / (sDot - eDot); + + sDiff = irs->pData[rSt].rx - ils->pData[lSt].rx; + eDiff = irs->pData[rEn].rx - ils->pData[lSt].rx; + sDot = cross(ldir, sDiff); + eDot = cross(ldir, eDiff); + + atR = sDot / (sDot - eDot); + + return true; + } + + // plus de colinearite ni d'extremites en commun + m[1] = -m[1]; + m[2] = -m[2]; + { + double swap = m[0]; + m[0] = m[3]; + m[3] = swap; + } + + atL = (m[0]* usvs[0] + m[1] * usvs[1]) / det; + atR = -(m[2] * usvs[0] + m[3] * usvs[1]) / det; + atx = ils->pData[lSt].rx + atL * ldir; + + + return true; +} + +bool +Shape::TesteAdjacency (Shape * a, int no, const Geom::Point atx, int nPt, + bool push) +{ + if (nPt == a->swsData[no].stPt || nPt == a->swsData[no].enPt) + return false; + + Geom::Point adir, diff, ast, aen, diff1, diff2, diff3, diff4; + + ast = a->pData[a->getEdge(no).st].rx; + aen = a->pData[a->getEdge(no).en].rx; + + adir = a->eData[no].rdx; + + double sle = a->eData[no].length; + double ile = a->eData[no].ilength; + + diff = atx - ast; + + double e = IHalfRound(cross(adir, diff) * a->eData[no].isqlength); + if (-3 < e && e < 3) + { + double rad = HalfRound (0.501); // when using single precision, 0.505 is better (0.5 would be the correct value, + // but it produces lots of bugs) + diff1[0] = diff[0] - rad; + diff1[1] = diff[1] - rad; + diff2[0] = diff[0] + rad; + diff2[1] = diff[1] - rad; + diff3[0] = diff[0] + rad; + diff3[1] = diff[1] + rad; + diff4[0] = diff[0] - rad; + diff4[1] = diff[1] + rad; + double di1, di2; + bool adjacent = false; + di1 = cross(adir, diff1); + di2 = cross(adir, diff3); + if ((di1 < 0 && di2 > 0) || (di1 > 0 && di2 < 0)) + { + adjacent = true; + } + else + { + di1 = cross(adir, diff2); + di2 = cross(adir, diff4); + if ((di1 < 0 && di2 > 0) || (di1 > 0 && di2 < 0)) + { + adjacent = true; + } + } + if (adjacent) + { + double t = dot (diff, adir); + if (t > 0 && t < sle) + { + if (push) + { + t *= ile; + PushIncidence (a, no, nPt, t); + } + return true; + } + } + } + return false; +} + +void +Shape::CheckAdjacencies (int lastPointNo, int lastChgtPt, Shape * /*shapeHead*/, + int /*edgeHead*/) +{ + for (auto & chgt : chgts) + { + int chLeN = chgt.ptNo; + int chRiN = chgt.ptNo; + if (chgt.src) + { + Shape *lS = chgt.src; + int lB = chgt.bord; + int lftN = lS->swsData[lB].leftRnd; + int rgtN = lS->swsData[lB].rightRnd; + if (lftN < chLeN) + chLeN = lftN; + if (rgtN > chRiN) + chRiN = rgtN; +// for (int n=lftN;n<=rgtN;n++) CreateIncidence(lS,lB,n); + for (int n = lftN - 1; n >= lastChgtPt; n--) + { + if (TesteAdjacency (lS, lB, getPoint(n).x, n, false) == + false) + break; + lS->swsData[lB].leftRnd = n; + } + for (int n = rgtN + 1; n < lastPointNo; n++) + { + if (TesteAdjacency (lS, lB, getPoint(n).x, n, false) == + false) + break; + lS->swsData[lB].rightRnd = n; + } + } + if (chgt.osrc) + { + Shape *rS = chgt.osrc; + int rB = chgt.obord; + int lftN = rS->swsData[rB].leftRnd; + int rgtN = rS->swsData[rB].rightRnd; + if (lftN < chLeN) + chLeN = lftN; + if (rgtN > chRiN) + chRiN = rgtN; +// for (int n=lftN;n<=rgtN;n++) CreateIncidence(rS,rB,n); + for (int n = lftN - 1; n >= lastChgtPt; n--) + { + if (TesteAdjacency (rS, rB, getPoint(n).x, n, false) == + false) + break; + rS->swsData[rB].leftRnd = n; + } + for (int n = rgtN + 1; n < lastPointNo; n++) + { + if (TesteAdjacency (rS, rB, getPoint(n).x, n, false) == + false) + break; + rS->swsData[rB].rightRnd = n; + } + } + if (chgt.lSrc) + { + if (chgt.lSrc->swsData[chgt.lBrd].leftRnd < lastChgtPt) + { + Shape *nSrc = chgt.lSrc; + int nBrd = chgt.lBrd /*,nNo=chgts[cCh].ptNo */ ; + bool hit; + + do + { + hit = false; + for (int n = chRiN; n >= chLeN; n--) + { + if (TesteAdjacency + (nSrc, nBrd, getPoint(n).x, n, false)) + { + if (nSrc->swsData[nBrd].leftRnd < lastChgtPt) + { + nSrc->swsData[nBrd].leftRnd = n; + nSrc->swsData[nBrd].rightRnd = n; + } + else + { + if (n < nSrc->swsData[nBrd].leftRnd) + nSrc->swsData[nBrd].leftRnd = n; + if (n > nSrc->swsData[nBrd].rightRnd) + nSrc->swsData[nBrd].rightRnd = n; + } + hit = true; + } + } + for (int n = chLeN - 1; n >= lastChgtPt; n--) + { + if (TesteAdjacency + (nSrc, nBrd, getPoint(n).x, n, false) == false) + break; + if (nSrc->swsData[nBrd].leftRnd < lastChgtPt) + { + nSrc->swsData[nBrd].leftRnd = n; + nSrc->swsData[nBrd].rightRnd = n; + } + else + { + if (n < nSrc->swsData[nBrd].leftRnd) + nSrc->swsData[nBrd].leftRnd = n; + if (n > nSrc->swsData[nBrd].rightRnd) + nSrc->swsData[nBrd].rightRnd = n; + } + hit = true; + } + if (hit) + { + SweepTree *node = + static_cast < SweepTree * >(nSrc->swsData[nBrd].misc); + if (node == nullptr) + break; + node = static_cast < SweepTree * >(node->elem[LEFT]); + if (node == nullptr) + break; + nSrc = node->src; + nBrd = node->bord; + if (nSrc->swsData[nBrd].leftRnd >= lastChgtPt) + break; + } + } + while (hit); + + } + } + if (chgt.rSrc) + { + if (chgt.rSrc->swsData[chgt.rBrd].leftRnd < lastChgtPt) + { + Shape *nSrc = chgt.rSrc; + int nBrd = chgt.rBrd /*,nNo=chgts[cCh].ptNo */ ; + bool hit; + do + { + hit = false; + for (int n = chLeN; n <= chRiN; n++) + { + if (TesteAdjacency + (nSrc, nBrd, getPoint(n).x, n, false)) + { + if (nSrc->swsData[nBrd].leftRnd < lastChgtPt) + { + nSrc->swsData[nBrd].leftRnd = n; + nSrc->swsData[nBrd].rightRnd = n; + } + else + { + if (n < nSrc->swsData[nBrd].leftRnd) + nSrc->swsData[nBrd].leftRnd = n; + if (n > nSrc->swsData[nBrd].rightRnd) + nSrc->swsData[nBrd].rightRnd = n; + } + hit = true; + } + } + for (int n = chRiN + 1; n < lastPointNo; n++) + { + if (TesteAdjacency + (nSrc, nBrd, getPoint(n).x, n, false) == false) + break; + if (nSrc->swsData[nBrd].leftRnd < lastChgtPt) + { + nSrc->swsData[nBrd].leftRnd = n; + nSrc->swsData[nBrd].rightRnd = n; + } + else + { + if (n < nSrc->swsData[nBrd].leftRnd) + nSrc->swsData[nBrd].leftRnd = n; + if (n > nSrc->swsData[nBrd].rightRnd) + nSrc->swsData[nBrd].rightRnd = n; + } + hit = true; + } + if (hit) + { + SweepTree *node = + static_cast < SweepTree * >(nSrc->swsData[nBrd].misc); + if (node == nullptr) + break; + node = static_cast < SweepTree * >(node->elem[RIGHT]); + if (node == nullptr) + break; + nSrc = node->src; + nBrd = node->bord; + if (nSrc->swsData[nBrd].leftRnd >= lastChgtPt) + break; + } + } + while (hit); + } + } + } +} + + +void Shape::AddChgt(int lastPointNo, int lastChgtPt, Shape * &shapeHead, + int &edgeHead, sTreeChangeType type, Shape * lS, int lB, Shape * rS, + int rB) +{ + sTreeChange c; + c.ptNo = lastPointNo; + c.type = type; + c.src = lS; + c.bord = lB; + c.osrc = rS; + c.obord = rB; + chgts.push_back(c); + const int nCh = chgts.size() - 1; + + /* FIXME: this looks like a cut and paste job */ + + if (lS) { + SweepTree *lE = static_cast < SweepTree * >(lS->swsData[lB].misc); + if (lE && lE->elem[LEFT]) { + SweepTree *llE = static_cast < SweepTree * >(lE->elem[LEFT]); + chgts[nCh].lSrc = llE->src; + chgts[nCh].lBrd = llE->bord; + } else { + chgts[nCh].lSrc = nullptr; + chgts[nCh].lBrd = -1; + } + + if (lS->swsData[lB].leftRnd < lastChgtPt) { + lS->swsData[lB].leftRnd = lastPointNo; + lS->swsData[lB].nextSh = shapeHead; + lS->swsData[lB].nextBo = edgeHead; + edgeHead = lB; + shapeHead = lS; + } else { + int old = lS->swsData[lB].leftRnd; + if (getPoint(old).x[0] > getPoint(lastPointNo).x[0]) { + lS->swsData[lB].leftRnd = lastPointNo; + } + } + if (lS->swsData[lB].rightRnd < lastChgtPt) { + lS->swsData[lB].rightRnd = lastPointNo; + } else { + int old = lS->swsData[lB].rightRnd; + if (getPoint(old).x[0] < getPoint(lastPointNo).x[0]) + lS->swsData[lB].rightRnd = lastPointNo; + } + } + + if (rS) { + SweepTree *rE = static_cast < SweepTree * >(rS->swsData[rB].misc); + if (rE->elem[RIGHT]) { + SweepTree *rrE = static_cast < SweepTree * >(rE->elem[RIGHT]); + chgts[nCh].rSrc = rrE->src; + chgts[nCh].rBrd = rrE->bord; + } else { + chgts[nCh].rSrc = nullptr; + chgts[nCh].rBrd = -1; + } + + if (rS->swsData[rB].leftRnd < lastChgtPt) { + rS->swsData[rB].leftRnd = lastPointNo; + rS->swsData[rB].nextSh = shapeHead; + rS->swsData[rB].nextBo = edgeHead; + edgeHead = rB; + shapeHead = rS; + } else { + int old = rS->swsData[rB].leftRnd; + if (getPoint(old).x[0] > getPoint(lastPointNo).x[0]) { + rS->swsData[rB].leftRnd = lastPointNo; + } + } + if (rS->swsData[rB].rightRnd < lastChgtPt) { + rS->swsData[rB].rightRnd = lastPointNo; + } else { + int old = rS->swsData[rB].rightRnd; + if (getPoint(old).x[0] < getPoint(lastPointNo).x[0]) + rS->swsData[rB].rightRnd = lastPointNo; + } + } else { + SweepTree *lE = static_cast < SweepTree * >(lS->swsData[lB].misc); + if (lE && lE->elem[RIGHT]) { + SweepTree *rlE = static_cast < SweepTree * >(lE->elem[RIGHT]); + chgts[nCh].rSrc = rlE->src; + chgts[nCh].rBrd = rlE->bord; + } else { + chgts[nCh].rSrc = nullptr; + chgts[nCh].rBrd = -1; + } + } +} + +// is this a debug function? It's calling localized "printf" ... +void +Shape::Validate () +{ + for (int i = 0; i < numberOfPoints(); i++) + { + pData[i].rx = getPoint(i).x; + } + for (int i = 0; i < numberOfEdges(); i++) + { + eData[i].rdx = getEdge(i).dx; + } + for (int i = 0; i < numberOfEdges(); i++) + { + for (int j = i + 1; j < numberOfEdges(); j++) + { + Geom::Point atx; + double atL, atR; + if (TesteIntersection (this, this, i, j, atx, atL, atR, false)) + { + printf ("%i %i %f %f di=%f %f dj=%f %f\n", i, j, atx[0],atx[1],getEdge(i).dx[0],getEdge(i).dx[1],getEdge(j).dx[0],getEdge(j).dx[1]); + } + } + } + fflush (stdout); +} + +void +Shape::CheckEdges (int lastPointNo, int lastChgtPt, Shape * a, Shape * b, + BooleanOp mod) +{ + + for (auto & chgt : chgts) + { + if (chgt.type == 0) + { + Shape *lS = chgt.src; + int lB = chgt.bord; + lS->swsData[lB].curPoint = chgt.ptNo; + } + } + for (auto & chgt : chgts) + { +// int chLeN=chgts[cCh].ptNo; +// int chRiN=chgts[cCh].ptNo; + if (chgt.src) + { + Shape *lS = chgt.src; + int lB = chgt.bord; + Avance (lastPointNo, lastChgtPt, lS, lB, a, b, mod); + } + if (chgt.osrc) + { + Shape *rS = chgt.osrc; + int rB = chgt.obord; + Avance (lastPointNo, lastChgtPt, rS, rB, a, b, mod); + } + if (chgt.lSrc) + { + Shape *nSrc = chgt.lSrc; + int nBrd = chgt.lBrd; + while (nSrc->swsData[nBrd].leftRnd >= + lastChgtPt /*&& nSrc->swsData[nBrd].doneTo < lastChgtPt */ ) + { + Avance (lastPointNo, lastChgtPt, nSrc, nBrd, a, b, mod); + + SweepTree *node = + static_cast < SweepTree * >(nSrc->swsData[nBrd].misc); + if (node == nullptr) + break; + node = static_cast < SweepTree * >(node->elem[LEFT]); + if (node == nullptr) + break; + nSrc = node->src; + nBrd = node->bord; + } + } + if (chgt.rSrc) + { + Shape *nSrc = chgt.rSrc; + int nBrd = chgt.rBrd; + while (nSrc->swsData[nBrd].rightRnd >= + lastChgtPt /*&& nSrc->swsData[nBrd].doneTo < lastChgtPt */ ) + { + Avance (lastPointNo, lastChgtPt, nSrc, nBrd, a, b, mod); + + SweepTree *node = + static_cast < SweepTree * >(nSrc->swsData[nBrd].misc); + if (node == nullptr) + break; + node = static_cast < SweepTree * >(node->elem[RIGHT]); + if (node == nullptr) + break; + nSrc = node->src; + nBrd = node->bord; + } + } + } +} + +void +Shape::Avance (int lastPointNo, int lastChgtPt, Shape * lS, int lB, Shape * /*a*/, + Shape * b, BooleanOp mod) +{ + double dd = HalfRound (1); + bool avoidDiag = false; +// if ( lastChgtPt > 0 && pts[lastChgtPt-1].y+dd == pts[lastChgtPt].y ) avoidDiag=true; + + bool direct = true; + if (lS == b && (mod == bool_op_diff || mod == bool_op_symdiff)) + direct = false; + int lftN = lS->swsData[lB].leftRnd; + int rgtN = lS->swsData[lB].rightRnd; + if (lS->swsData[lB].doneTo < lastChgtPt) + { + int lp = lS->swsData[lB].curPoint; + if (lp >= 0 && getPoint(lp).x[1] + dd == getPoint(lastChgtPt).x[1]) + avoidDiag = true; + if (lS->eData[lB].rdx[1] == 0) + { + // tjs de gauche a droite et pas de diagonale + if (lS->eData[lB].rdx[0] >= 0) + { + for (int p = lftN; p <= rgtN; p++) + { + DoEdgeTo (lS, lB, p, direct, true); + lp = p; + } + } + else + { + for (int p = lftN; p <= rgtN; p++) + { + DoEdgeTo (lS, lB, p, direct, false); + lp = p; + } + } + } + else if (lS->eData[lB].rdx[1] > 0) + { + if (lS->eData[lB].rdx[0] >= 0) + { + + for (int p = lftN; p <= rgtN; p++) + { + if (avoidDiag && p == lftN && getPoint(lftN).x[0] == getPoint(lp).x[0] + dd) + { + if (lftN > 0 && lftN - 1 >= lastChgtPt + && getPoint(lftN - 1).x[0] == getPoint(lp).x[0]) + { + DoEdgeTo (lS, lB, lftN - 1, direct, true); + DoEdgeTo (lS, lB, lftN, direct, true); + } + else + { + DoEdgeTo (lS, lB, lftN, direct, true); + } + } + else + { + DoEdgeTo (lS, lB, p, direct, true); + } + lp = p; + } + } + else + { + + for (int p = rgtN; p >= lftN; p--) + { + if (avoidDiag && p == rgtN && getPoint(rgtN).x[0] == getPoint(lp).x[0] - dd) + { + if (rgtN < numberOfPoints() && rgtN + 1 < lastPointNo + && getPoint(rgtN + 1).x[0] == getPoint(lp).x[0]) + { + DoEdgeTo (lS, lB, rgtN + 1, direct, true); + DoEdgeTo (lS, lB, rgtN, direct, true); + } + else + { + DoEdgeTo (lS, lB, rgtN, direct, true); + } + } + else + { + DoEdgeTo (lS, lB, p, direct, true); + } + lp = p; + } + } + } + else + { + if (lS->eData[lB].rdx[0] >= 0) + { + + for (int p = rgtN; p >= lftN; p--) + { + if (avoidDiag && p == rgtN && getPoint(rgtN).x[0] == getPoint(lp).x[0] - dd) + { + if (rgtN < numberOfPoints() && rgtN + 1 < lastPointNo + && getPoint(rgtN + 1).x[0] == getPoint(lp).x[0]) + { + DoEdgeTo (lS, lB, rgtN + 1, direct, false); + DoEdgeTo (lS, lB, rgtN, direct, false); + } + else + { + DoEdgeTo (lS, lB, rgtN, direct, false); + } + } + else + { + DoEdgeTo (lS, lB, p, direct, false); + } + lp = p; + } + } + else + { + + for (int p = lftN; p <= rgtN; p++) + { + if (avoidDiag && p == lftN && getPoint(lftN).x[0] == getPoint(lp).x[0] + dd) + { + if (lftN > 0 && lftN - 1 >= lastChgtPt + && getPoint(lftN - 1).x[0] == getPoint(lp).x[0]) + { + DoEdgeTo (lS, lB, lftN - 1, direct, false); + DoEdgeTo (lS, lB, lftN, direct, false); + } + else + { + DoEdgeTo (lS, lB, lftN, direct, false); + } + } + else + { + DoEdgeTo (lS, lB, p, direct, false); + } + lp = p; + } + } + } + lS->swsData[lB].curPoint = lp; + } + lS->swsData[lB].doneTo = lastPointNo - 1; +} + +void +Shape::DoEdgeTo (Shape * iS, int iB, int iTo, bool direct, bool sens) +{ + int lp = iS->swsData[iB].curPoint; + int ne = -1; + if (sens) + { + if (direct) + ne = AddEdge (lp, iTo); + else + ne = AddEdge (iTo, lp); + } + else + { + if (direct) + ne = AddEdge (iTo, lp); + else + ne = AddEdge (lp, iTo); + } + if (ne >= 0 && _has_back_data) + { + ebData[ne].pathID = iS->ebData[iB].pathID; + ebData[ne].pieceID = iS->ebData[iB].pieceID; + if (iS->eData[iB].length < 0.00001) + { + ebData[ne].tSt = ebData[ne].tEn = iS->ebData[iB].tSt; + } + else + { + double bdl = iS->eData[iB].ilength; + Geom::Point bpx = iS->pData[iS->getEdge(iB).st].rx; + Geom::Point bdx = iS->eData[iB].rdx; + Geom::Point psx = getPoint(getEdge(ne).st).x; + Geom::Point pex = getPoint(getEdge(ne).en).x; + Geom::Point psbx=psx-bpx; + Geom::Point pebx=pex-bpx; + double pst = dot(psbx,bdx) * bdl; + double pet = dot(pebx,bdx) * bdl; + pst = iS->ebData[iB].tSt * (1 - pst) + iS->ebData[iB].tEn * pst; + pet = iS->ebData[iB].tSt * (1 - pet) + iS->ebData[iB].tEn * pet; + ebData[ne].tEn = pet; + ebData[ne].tSt = pst; + } + } + iS->swsData[iB].curPoint = iTo; + if (ne >= 0) + { + int cp = iS->swsData[iB].firstLinkedPoint; + swsData[ne].firstLinkedPoint = iS->swsData[iB].firstLinkedPoint; + while (cp >= 0) + { + pData[cp].askForWindingB = ne; + cp = pData[cp].nextLinkedPoint; + } + iS->swsData[iB].firstLinkedPoint = -1; + } +} |