diff options
author | Maxime Curioni <maxime.curioni@gmail.com> | 2008-05-08 23:16:40 +0400 |
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committer | Maxime Curioni <maxime.curioni@gmail.com> | 2008-05-08 23:16:40 +0400 |
commit | 64e4a3ec9aed6c8abe095e2cd1fe1552f7cde51c (patch) | |
tree | 6c77358bd447b6c2d215324ef48fc12d1f5ae5ca /source/blender/freestyle/intern/view_map/ViewMapBuilder.cpp | |
parent | cf2e1e2857cfc5b3c2848c7fc6c9d919ac72fabb (diff) | |
parent | 106974a9d2d5caa5188322507980e3d57d2e3517 (diff) |
soc-2008-mxcurioni: merged changes to revision 14747, cosmetic changes for source/blender/freestyle
Diffstat (limited to 'source/blender/freestyle/intern/view_map/ViewMapBuilder.cpp')
-rwxr-xr-x | source/blender/freestyle/intern/view_map/ViewMapBuilder.cpp | 1027 |
1 files changed, 1027 insertions, 0 deletions
diff --git a/source/blender/freestyle/intern/view_map/ViewMapBuilder.cpp b/source/blender/freestyle/intern/view_map/ViewMapBuilder.cpp new file mode 100755 index 00000000000..32f5283a63c --- /dev/null +++ b/source/blender/freestyle/intern/view_map/ViewMapBuilder.cpp @@ -0,0 +1,1027 @@ + +// +// Copyright (C) : Please refer to the COPYRIGHT file distributed +// with this source distribution. +// +// This program is free software; you can redistribute it and/or +// modify it under the terms of the GNU General Public License +// as published by the Free Software Foundation; either version 2 +// of the License, or (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. +// +/////////////////////////////////////////////////////////////////////////////// + +#include <algorithm> +#include "ViewMapBuilder.h" + +using namespace std; + +ViewMap* ViewMapBuilder::BuildViewMap(WingedEdge& we, visibility_algo iAlgo, real epsilon) { + _ViewMap = new ViewMap; + _currentId = 1; + _currentFId = 0; + _currentSVertexId = 0; + + // Builds initial view edges + computeInitialViewEdges(we); + + // Detects cusps + computeCusps(_ViewMap); + + // Compute intersections + ComputeIntersections(_ViewMap, sweep_line, epsilon); + + // Compute visibility + ComputeEdgesVisibility(_ViewMap, iAlgo, _Grid, epsilon); + + return _ViewMap; +} + +void ViewMapBuilder::computeInitialViewEdges(WingedEdge& we) +{ + vector<WShape*> wshapes = we.getWShapes(); + SShape* psShape; + + for (vector<WShape*>::const_iterator it = wshapes.begin(); + it != wshapes.end(); + it++) { + // create the embedding + psShape = new SShape; + psShape->SetId((*it)->GetId()); + psShape->SetMaterials((*it)->materials()); // FIXME + + // create the view shape + ViewShape * vshape = new ViewShape(psShape); + // add this view shape to the view map: + _ViewMap->AddViewShape(vshape); + + _pViewEdgeBuilder->SetCurrentViewId(_currentId); // we want to number the view edges in a unique way for the while scene. + _pViewEdgeBuilder->SetCurrentFId(_currentFId); // we want to number the feature edges in a unique way for the while scene. + _pViewEdgeBuilder->SetCurrentSVertexId(_currentFId); // we want to number the SVertex in a unique way for the while scene. + _pViewEdgeBuilder->BuildViewEdges(dynamic_cast<WXShape*>(*it), vshape, + _ViewMap->ViewEdges(), + _ViewMap->ViewVertices(), + _ViewMap->FEdges(), + _ViewMap->SVertices()); + + _currentId = _pViewEdgeBuilder->currentViewId()+1; + _currentFId = _pViewEdgeBuilder->currentFId()+1; + _currentSVertexId = _pViewEdgeBuilder->currentSVertexId()+1; + + psShape->ComputeBBox(); + } +} + +void ViewMapBuilder::computeCusps(ViewMap *ioViewMap){ + vector<ViewVertex*> newVVertices; + vector<ViewEdge*> newVEdges; + ViewMap::viewedges_container& vedges = ioViewMap->ViewEdges(); + ViewMap::viewedges_container::iterator ve=vedges.begin(), veend=vedges.end(); + for(; + ve!=veend; + ++ve){ + if((!((*ve)->getNature() & Nature::SILHOUETTE)) || (!((*ve)->fedgeA()->isSmooth()))) + continue; + FEdge *fe = (*ve)->fedgeA(); + FEdge * fefirst = fe; + bool first = true; + bool positive = true; + do{ + FEdgeSmooth * fes = dynamic_cast<FEdgeSmooth*>(fe); + Vec3r A((fes)->vertexA()->point3d()); + Vec3r B((fes)->vertexB()->point3d()); + Vec3r AB(B-A); + AB.normalize(); + Vec3r m((A+B)/2.0); + Vec3r crossP(AB^(fes)->normal()); + crossP.normalize(); + Vec3r viewvector(m-_viewpoint); + viewvector.normalize(); + if(first){ + if(((crossP)*(viewvector)) > 0) + positive = true; + else + positive = false; + first = false; + } + // If we're in a positive part, we need + // a stronger negative value to change + NonTVertex *cusp = 0; + if(positive){ + if(((crossP)*(viewvector)) < -0.1){ + // state changes + positive = false; + // creates and insert cusp + cusp = dynamic_cast<NonTVertex*>(ioViewMap->InsertViewVertex(fes->vertexA(), newVEdges)); + if(cusp!=0) + cusp->setNature(cusp->getNature()|Nature::CUSP); + } + + }else{ + // If we're in a negative part, we need + // a stronger negative value to change + if(((crossP)*(viewvector)) > 0.1){ + positive = true; + cusp = dynamic_cast<NonTVertex*>(ioViewMap->InsertViewVertex(fes->vertexA(), newVEdges)); + if(cusp!=0) + cusp->setNature(cusp->getNature()|Nature::CUSP); + } + } + fe = fe->nextEdge(); + }while((fe!=0) && (fe!=fefirst)); + } + for(ve=newVEdges.begin(), veend=newVEdges.end(); + ve!=veend; + ++ve){ + (*ve)->viewShape()->AddEdge(*ve); + vedges.push_back(*ve); + } +} +void ViewMapBuilder::ComputeEdgesVisibility(ViewMap *ioViewMap, visibility_algo iAlgo, Grid *iGrid, real epsilon) +{ + if((iAlgo == ray_casting || + iAlgo == ray_casting_fast || + iAlgo == ray_casting_very_fast) && (NULL == iGrid)) + { + cerr << "Error: can't cast ray, no grid defined" << endl; + return; + } + + switch(iAlgo) + { + case ray_casting: + ComputeRayCastingVisibility(ioViewMap, iGrid, epsilon); + break; + case ray_casting_fast: + ComputeFastRayCastingVisibility(ioViewMap, iGrid, epsilon); + break; + case ray_casting_very_fast: + ComputeVeryFastRayCastingVisibility(ioViewMap, iGrid, epsilon); + break; + default: + break; + } +} + +static const unsigned gProgressBarMaxSteps = 10; +static const unsigned gProgressBarMinSize = 2000; + +void ViewMapBuilder::ComputeRayCastingVisibility(ViewMap *ioViewMap, Grid* iGrid, real epsilon) +{ + vector<ViewEdge*>& vedges = ioViewMap->ViewEdges(); + bool progressBarDisplay = false; + unsigned progressBarStep = 0; + unsigned vEdgesSize = vedges.size(); + unsigned fEdgesSize = ioViewMap->FEdges().size(); + + if(_pProgressBar != NULL && fEdgesSize > gProgressBarMinSize) { + unsigned progressBarSteps = min(gProgressBarMaxSteps, vEdgesSize); + progressBarStep = vEdgesSize / progressBarSteps; + _pProgressBar->reset(); + _pProgressBar->setLabelText("Computing Ray casting Visibility"); + _pProgressBar->setTotalSteps(progressBarSteps); + _pProgressBar->setProgress(0); + progressBarDisplay = true; + } + + unsigned counter = progressBarStep; + FEdge * fe, *festart; + int nSamples = 0; + vector<Polygon3r*> aFaces; + Polygon3r *aFace = 0; + unsigned tmpQI = 0; + unsigned qiClasses[256]; + unsigned maxIndex, maxCard; + unsigned qiMajority; + static unsigned timestamp = 1; + for(vector<ViewEdge*>::iterator ve=vedges.begin(), veend=vedges.end(); + ve!=veend; + ve++) + { + festart = (*ve)->fedgeA(); + fe = (*ve)->fedgeA(); + qiMajority = 1; + do { + qiMajority++; + fe = fe->nextEdge(); + } while (fe && fe != festart); + qiMajority >>= 1; + + tmpQI = 0; + maxIndex = 0; + maxCard = 0; + nSamples = 0; + fe = (*ve)->fedgeA(); + memset(qiClasses, 0, 256 * sizeof(*qiClasses)); + set<ViewShape*> occluders; + do + { + if((maxCard < qiMajority)) { + tmpQI = ComputeRayCastingVisibility(fe, iGrid, epsilon, occluders, &aFace, timestamp++); + + if(tmpQI >= 256) + cerr << "Warning: too many occluding levels" << endl; + + if (++qiClasses[tmpQI] > maxCard) { + maxCard = qiClasses[tmpQI]; + maxIndex = tmpQI; + } + } + else + FindOccludee(fe, iGrid, epsilon, &aFace, timestamp++); + + if(aFace) { + fe->SetaFace(*aFace); + aFaces.push_back(aFace); + fe->SetOccludeeEmpty(false); + } + else + fe->SetOccludeeEmpty(true); + + ++nSamples; + fe = fe->nextEdge(); + } + while((maxCard < qiMajority) && (0!=fe) && (fe!=festart)); + + // ViewEdge + // qi -- + (*ve)->SetQI(maxIndex); + // occluders -- + for(set<ViewShape*>::iterator o=occluders.begin(), oend=occluders.end(); + o!=oend; + ++o) + (*ve)->AddOccluder((*o)); + // occludee -- + if(!aFaces.empty()) + { + if(aFaces.size() <= (float)nSamples/2.f) + { + (*ve)->SetaShape(0); + } + else + { + vector<Polygon3r*>::iterator p = aFaces.begin(); + WFace * wface = (WFace*)((*p)->userdata); + ViewShape *vshape = ioViewMap->viewShape(wface->GetVertex(0)->shape()->GetId()); + ++p; + (*ve)->SetaShape(vshape); + } + } + + if(progressBarDisplay) { + counter--; + if (counter <= 0) { + counter = progressBarStep; + _pProgressBar->setProgress(_pProgressBar->getProgress() + 1); + } + } + aFaces.clear(); + } +} + +void ViewMapBuilder::ComputeFastRayCastingVisibility(ViewMap *ioViewMap, Grid* iGrid, real epsilon) +{ + vector<ViewEdge*>& vedges = ioViewMap->ViewEdges(); + bool progressBarDisplay = false; + unsigned progressBarStep = 0; + unsigned vEdgesSize = vedges.size(); + unsigned fEdgesSize = ioViewMap->FEdges().size(); + + if(_pProgressBar != NULL && fEdgesSize > gProgressBarMinSize) { + unsigned progressBarSteps = min(gProgressBarMaxSteps, vEdgesSize); + progressBarStep = vEdgesSize / progressBarSteps; + _pProgressBar->reset(); + _pProgressBar->setLabelText("Computing Ray casting Visibility"); + _pProgressBar->setTotalSteps(progressBarSteps); + _pProgressBar->setProgress(0); + progressBarDisplay = true; + } + + unsigned counter = progressBarStep; + FEdge * fe, *festart; + unsigned nSamples = 0; + vector<Polygon3r*> aFaces; + Polygon3r *aFace = 0; + unsigned tmpQI = 0; + unsigned qiClasses[256]; + unsigned maxIndex, maxCard; + unsigned qiMajority; + static unsigned timestamp = 1; + bool even_test; + for(vector<ViewEdge*>::iterator ve=vedges.begin(), veend=vedges.end(); + ve!=veend; + ve++) + { + festart = (*ve)->fedgeA(); + fe = (*ve)->fedgeA(); + qiMajority = 1; + do { + qiMajority++; + fe = fe->nextEdge(); + } while (fe && fe != festart); + if (qiMajority >= 4) + qiMajority >>= 2; + else + qiMajority = 1; + + set<ViewShape*> occluders; + + even_test = true; + maxIndex = 0; + maxCard = 0; + nSamples = 0; + memset(qiClasses, 0, 256 * sizeof(*qiClasses)); + fe = (*ve)->fedgeA(); + do + { + if (even_test) + { + if((maxCard < qiMajority)) { + tmpQI = ComputeRayCastingVisibility(fe, iGrid, epsilon, occluders, &aFace, timestamp++); + + if(tmpQI >= 256) + cerr << "Warning: too many occluding levels" << endl; + + if (++qiClasses[tmpQI] > maxCard) { + maxCard = qiClasses[tmpQI]; + maxIndex = tmpQI; + } + } + else + FindOccludee(fe, iGrid, epsilon, &aFace, timestamp++); + + if(aFace) + { + fe->SetaFace(*aFace); + aFaces.push_back(aFace); + } + ++nSamples; + even_test = false; + } + else + even_test = true; + fe = fe->nextEdge(); + } while ((maxCard < qiMajority) && (0!=fe) && (fe!=festart)); + + (*ve)->SetQI(maxIndex); + + if(!aFaces.empty()) + { + if(aFaces.size() < nSamples / 2) + { + (*ve)->SetaShape(0); + } + else + { + vector<Polygon3r*>::iterator p = aFaces.begin(); + WFace * wface = (WFace*)((*p)->userdata); + ViewShape *vshape = ioViewMap->viewShape(wface->GetVertex(0)->shape()->GetId()); + ++p; + // for(; + // p!=pend; + // ++p) + // { + // WFace *f = (WFace*)((*p)->userdata); + // ViewShape *vs = ioViewMap->viewShape(f->GetVertex(0)->shape()->GetId()); + // if(vs != vshape) + // { + // sameShape = false; + // break; + // } + // } + // if(sameShape) + (*ve)->SetaShape(vshape); + } + } + + //(*ve)->SetaFace(aFace); + + if(progressBarDisplay) { + counter--; + if (counter <= 0) { + counter = progressBarStep; + _pProgressBar->setProgress(_pProgressBar->getProgress() + 1); + } + } + aFaces.clear(); + } +} + +void ViewMapBuilder::ComputeVeryFastRayCastingVisibility(ViewMap *ioViewMap, Grid* iGrid, real epsilon) +{ + vector<ViewEdge*>& vedges = ioViewMap->ViewEdges(); + bool progressBarDisplay = false; + unsigned progressBarStep = 0; + unsigned vEdgesSize = vedges.size(); + unsigned fEdgesSize = ioViewMap->FEdges().size(); + + if(_pProgressBar != NULL && fEdgesSize > gProgressBarMinSize) { + unsigned progressBarSteps = min(gProgressBarMaxSteps, vEdgesSize); + progressBarStep = vEdgesSize / progressBarSteps; + _pProgressBar->reset(); + _pProgressBar->setLabelText("Computing Ray casting Visibility"); + _pProgressBar->setTotalSteps(progressBarSteps); + _pProgressBar->setProgress(0); + progressBarDisplay = true; + } + + unsigned counter = progressBarStep; + FEdge* fe; + unsigned qi = 0; + Polygon3r *aFace = 0; + static unsigned timestamp = 1; + for(vector<ViewEdge*>::iterator ve=vedges.begin(), veend=vedges.end(); + ve!=veend; + ve++) + { + set<ViewShape*> occluders; + + fe = (*ve)->fedgeA(); + qi = ComputeRayCastingVisibility(fe, iGrid, epsilon, occluders, &aFace, timestamp++); + if(aFace) + { + fe->SetaFace(*aFace); + WFace * wface = (WFace*)(aFace->userdata); + ViewShape *vshape = ioViewMap->viewShape(wface->GetVertex(0)->shape()->GetId()); + (*ve)->SetaShape(vshape); + } + else + { + (*ve)->SetaShape(0); + } + + (*ve)->SetQI(qi); + + if(progressBarDisplay) { + counter--; + if (counter <= 0) { + counter = progressBarStep; + _pProgressBar->setProgress(_pProgressBar->getProgress() + 1); + } + } + } +} + + +void ViewMapBuilder::FindOccludee(FEdge *fe, Grid* iGrid, real epsilon, Polygon3r** oaPolygon, unsigned timestamp, + Vec3r& u, Vec3r& A, Vec3r& origin, Vec3r& edge, vector<WVertex*>& faceVertices) +{ + WFace *face = 0; + if(fe->isSmooth()){ + FEdgeSmooth * fes = dynamic_cast<FEdgeSmooth*>(fe); + face = (WFace*)fes->face(); + } + OccludersSet occluders; + WFace * oface; + bool skipFace; + + WVertex::incoming_edge_iterator ie; + OccludersSet::iterator p, pend; + + *oaPolygon = 0; + if(((fe)->getNature() & Nature::SILHOUETTE) || ((fe)->getNature() & Nature::BORDER)) + { + occluders.clear(); + // we cast a ray from A in the same direction but looking behind + Vec3r v(-u[0],-u[1],-u[2]); + iGrid->castInfiniteRay(A, v, occluders, timestamp); + + bool noIntersection = true; + real mint=FLT_MAX; + // we met some occluders, let us fill the aShape field + // with the first intersected occluder + for(p=occluders.begin(),pend=occluders.end(); + p!=pend; + p++) + { + // check whether the edge and the polygon plane are coincident: + //------------------------------------------------------------- + //first let us compute the plane equation. + oface = (WFace*)(*p)->userdata; + Vec3r v1(((*p)->getVertices())[0]); + Vec3r normal((*p)->getNormal()); + real d = -(v1 * normal); + real t,t_u,t_v; + + if(0 != face) + { + skipFace = false; + + if(face == oface) + continue; + + if(faceVertices.empty()) + continue; + + for(vector<WVertex*>::iterator fv=faceVertices.begin(), fvend=faceVertices.end(); + fv!=fvend; + ++fv) + { + if((*fv)->isBoundary()) + continue; + WVertex::incoming_edge_iterator iebegin=(*fv)->incoming_edges_begin(); + WVertex::incoming_edge_iterator ieend=(*fv)->incoming_edges_end(); + for(ie=iebegin;ie!=ieend; ++ie) + { + if((*ie) == 0) + continue; + + WFace * sface = (*ie)->GetbFace(); + if(sface == oface) + { + skipFace = true; + break; + } + } + if(skipFace) + break; + } + if(skipFace) + continue; + } + else + { + if(GeomUtils::COINCIDENT == GeomUtils::intersectRayPlane(origin, edge, normal, d, t, epsilon)) + continue; + } + if((*p)->rayIntersect(A, v, t,t_u,t_v)) + { + if (fabs(v * normal) > 0.0001) + if ((t>0.0)) // && (t<1.0)) + { + if (t<mint) + { + *oaPolygon = (*p); + mint = t; + noIntersection = false; + fe->SetOccludeeIntersection(Vec3r(A+t*v)); + } + } + } + } + + if(noIntersection) + *oaPolygon = 0; + } +} + +void ViewMapBuilder::FindOccludee(FEdge *fe, Grid* iGrid, real epsilon, Polygon3r** oaPolygon, unsigned timestamp) +{ + OccludersSet occluders; + + Vec3r A; + Vec3r edge; + Vec3r origin; + A = Vec3r(((fe)->vertexA()->point3D() + (fe)->vertexB()->point3D())/2.0); + edge = Vec3r((fe)->vertexB()->point3D()-(fe)->vertexA()->point3D()); + origin = Vec3r((fe)->vertexA()->point3D()); + Vec3r u(_viewpoint-A); + u.normalize(); + if(A < iGrid->getOrigin()) + cerr << "Warning: point is out of the grid for fedge " << fe->getId().getFirst() << "-" << fe->getId().getSecond() << endl; + + vector<WVertex*> faceVertices; + + WFace *face = 0; + if(fe->isSmooth()){ + FEdgeSmooth * fes = dynamic_cast<FEdgeSmooth*>(fe); + face = (WFace*)fes->face(); + } + if(0 != face) + face->RetrieveVertexList(faceVertices); + + return FindOccludee(fe,iGrid, epsilon, oaPolygon, timestamp, + u, A, origin, edge, faceVertices); +} + +int ViewMapBuilder::ComputeRayCastingVisibility(FEdge *fe, Grid* iGrid, real epsilon, set<ViewShape*>& oOccluders, + Polygon3r** oaPolygon, unsigned timestamp) +{ + OccludersSet occluders; + int qi = 0; + + Vec3r center; + Vec3r edge; + Vec3r origin; + + center = fe->center3d(); + edge = Vec3r(fe->vertexB()->point3D() - fe->vertexA()->point3D()); + origin = Vec3r(fe->vertexA()->point3D()); + // + // // Is the edge outside the view frustum ? + Vec3r gridOrigin(iGrid->getOrigin()); + Vec3r gridExtremity(iGrid->getOrigin()+iGrid->gridSize()); + + if( (center.x() < gridOrigin.x()) || (center.y() < gridOrigin.y()) || (center.z() < gridOrigin.z()) + ||(center.x() > gridExtremity.x()) || (center.y() > gridExtremity.y()) || (center.z() > gridExtremity.z())){ + cerr << "Warning: point is out of the grid for fedge " << fe->getId() << endl; + //return 0; + } + + + // Vec3r A(fe->vertexA()->point2d()); + // Vec3r B(fe->vertexB()->point2d()); + // int viewport[4]; + // SilhouetteGeomEngine::retrieveViewport(viewport); + // if( (A.x() < viewport[0]) || (A.x() > viewport[2]) || (A.y() < viewport[1]) || (A.y() > viewport[3]) + // ||(B.x() < viewport[0]) || (B.x() > viewport[2]) || (B.y() < viewport[1]) || (B.y() > viewport[3])){ + // cerr << "Warning: point is out of the grid for fedge " << fe->getId() << endl; + // //return 0; + // } + + Vec3r u(_viewpoint - center); + real raylength = u.norm(); + u.normalize(); + //cout << "grid origin " << iGrid->getOrigin().x() << "," << iGrid->getOrigin().y() << "," << iGrid->getOrigin().z() << endl; + //cout << "center " << center.x() << "," << center.y() << "," << center.z() << endl; + + iGrid->castRay(center, Vec3r(_viewpoint), occluders, timestamp); + + WFace *face = 0; + if(fe->isSmooth()){ + FEdgeSmooth * fes = dynamic_cast<FEdgeSmooth*>(fe); + face = (WFace*)fes->face(); + } + vector<WVertex*> faceVertices; + WVertex::incoming_edge_iterator ie; + + WFace * oface; + bool skipFace; + OccludersSet::iterator p, pend; + if(face) + face->RetrieveVertexList(faceVertices); + + for(p=occluders.begin(),pend=occluders.end(); + p!=pend; + p++) + { + // If we're dealing with an exact silhouette, check whether + // we must take care of this occluder of not. + // (Indeed, we don't consider the occluders that + // share at least one vertex with the face containing + // this edge). + //----------- + oface = (WFace*)(*p)->userdata; + Vec3r v1(((*p)->getVertices())[0]); + Vec3r normal((*p)->getNormal()); + real d = -(v1 * normal); + real t, t_u, t_v; + + if(0 != face) + { + skipFace = false; + + if(face == oface) + continue; + + + for(vector<WVertex*>::iterator fv=faceVertices.begin(), fvend=faceVertices.end(); + fv!=fvend; + ++fv) + { + if((*fv)->isBoundary()) + continue; + + WVertex::incoming_edge_iterator iebegin=(*fv)->incoming_edges_begin(); + WVertex::incoming_edge_iterator ieend=(*fv)->incoming_edges_end(); + for(ie=iebegin;ie!=ieend; ++ie) + { + if((*ie) == 0) + continue; + + WFace * sface = (*ie)->GetbFace(); + //WFace * sfacea = (*ie)->GetaFace(); + //if((sface == oface) || (sfacea == oface)) + if(sface == oface) + { + skipFace = true; + break; + } + } + if(skipFace) + break; + } + if(skipFace) + continue; + } + else + { + // check whether the edge and the polygon plane are coincident: + //------------------------------------------------------------- + //first let us compute the plane equation. + + if(GeomUtils::COINCIDENT == GeomUtils::intersectRayPlane(origin, edge, normal, d, t, epsilon)) + continue; + } + + if((*p)->rayIntersect(center, u, t, t_u, t_v)) + { + if (fabs(u * normal) > 0.0001) + if ((t>0.0) && (t<raylength)) + { + WFace *f = (WFace*)((*p)->userdata); + ViewShape *vshape = _ViewMap->viewShape(f->GetVertex(0)->shape()->GetId()); + oOccluders.insert(vshape); + ++qi; + if(!_EnableQI) + break; + } + } + } + + // Find occludee + FindOccludee(fe,iGrid, epsilon, oaPolygon, timestamp, + u, center, edge, origin, faceVertices); + + return qi; +} + +void ViewMapBuilder::ComputeIntersections(ViewMap *ioViewMap, intersection_algo iAlgo, real epsilon) +{ + switch(iAlgo) + { + case sweep_line: + ComputeSweepLineIntersections(ioViewMap, epsilon); + break; + default: + break; + } + ViewMap::viewvertices_container& vvertices = ioViewMap->ViewVertices(); + for(ViewMap::viewvertices_container::iterator vv=vvertices.begin(), vvend=vvertices.end(); + vv!=vvend; + ++vv) + { + if((*vv)->getNature() == Nature::T_VERTEX) + { + TVertex *tvertex = (TVertex*)(*vv); + cout << "TVertex " << tvertex->getId() << " has :" << endl; + cout << "FrontEdgeA: " << tvertex->frontEdgeA().first << endl; + cout << "FrontEdgeB: " << tvertex->frontEdgeB().first << endl; + cout << "BackEdgeA: " << tvertex->backEdgeA().first << endl; + cout << "BackEdgeB: " << tvertex->backEdgeB().first << endl << endl; + } + } +} + +struct less_SVertex2D : public binary_function<SVertex*, SVertex*, bool> +{ + real epsilon; + less_SVertex2D(real eps) + : binary_function<SVertex*,SVertex*,bool>() + { + epsilon = eps; + } + bool operator()(SVertex* x, SVertex* y) + { + Vec3r A = x->point2D(); + Vec3r B = y->point2D(); + for(unsigned int i=0; i<3; i++) + { + if((fabs(A[i] - B[i])) < epsilon) + continue; + if(A[i] < B[i]) + return true; + if(A[i] > B[i]) + return false; + } + + return false; + } +}; + +typedef Segment<FEdge*,Vec3r > segment; +typedef Intersection<segment> intersection; + +struct less_Intersection : public binary_function<intersection*, intersection*, bool> +{ + segment *edge; + less_Intersection(segment *iEdge) + : binary_function<intersection*,intersection*,bool>() + { + edge = iEdge; + } + bool operator()(intersection* x, intersection* y) + { + real tx = x->getParameter(edge); + real ty = y->getParameter(edge); + if(tx > ty) + return true; + return false; + } +}; + +struct silhouette_binary_rule : public binary_rule<segment,segment> +{ + silhouette_binary_rule() : binary_rule<segment,segment>() {} + virtual bool operator() (segment& s1, segment& s2) + { + FEdge * f1 = s1.edge(); + FEdge * f2 = s2.edge(); + + if((!(((f1)->getNature() & Nature::SILHOUETTE) || ((f1)->getNature() & Nature::BORDER))) && (!(((f2)->getNature() & Nature::SILHOUETTE) || ((f2)->getNature() & Nature::BORDER)))) + return false; + + return true; + } +}; + +void ViewMapBuilder::ComputeSweepLineIntersections(ViewMap *ioViewMap, real epsilon) +{ + vector<SVertex*>& svertices = ioViewMap->SVertices(); + bool progressBarDisplay = false; + unsigned sVerticesSize = svertices.size(); + unsigned fEdgesSize = ioViewMap->FEdges().size(); + // ViewMap::fedges_container& fedges = ioViewMap->FEdges(); + // for(ViewMap::fedges_container::const_iterator f=fedges.begin(), end=fedges.end(); + // f!=end; + // ++f){ + // cout << (*f)->aMaterialIndex() << "-" << (*f)->bMaterialIndex() << endl; + // } + + unsigned progressBarStep = 0; + + if(_pProgressBar != NULL && fEdgesSize > gProgressBarMinSize) { + unsigned progressBarSteps = min(gProgressBarMaxSteps, sVerticesSize); + progressBarStep = sVerticesSize / progressBarSteps; + _pProgressBar->reset(); + _pProgressBar->setLabelText("Computing Sweep Line Intersections"); + _pProgressBar->setTotalSteps(progressBarSteps); + _pProgressBar->setProgress(0); + progressBarDisplay = true; + } + + unsigned counter = progressBarStep; + + sort(svertices.begin(), svertices.end(), less_SVertex2D(epsilon)); + + SweepLine<FEdge*,Vec3r> SL; + + vector<FEdge*>& ioEdges = ioViewMap->FEdges(); + + vector<segment* > segments; + + vector<FEdge*>::iterator fe,fend; + + for(fe=ioEdges.begin(), fend=ioEdges.end(); + fe!=fend; + fe++) + { + segment * s = new segment((*fe), (*fe)->vertexA()->point2D(), (*fe)->vertexB()->point2D()); + (*fe)->userdata = s; + segments.push_back(s); + } + + vector<segment*> vsegments; + for(vector<SVertex*>::iterator sv=svertices.begin(),svend=svertices.end(); + sv!=svend; + sv++) + { + const vector<FEdge*>& vedges = (*sv)->fedges(); + + for(vector<FEdge*>::const_iterator sve=vedges.begin(), sveend=vedges.end(); + sve!=sveend; + sve++) + { + vsegments.push_back((segment*)((*sve)->userdata)); + } + + Vec3r evt((*sv)->point2D()); + silhouette_binary_rule sbr; + SL.process(evt, vsegments, sbr); + + if(progressBarDisplay) { + counter--; + if (counter <= 0) { + counter = progressBarStep; + _pProgressBar->setProgress(_pProgressBar->getProgress() + 1); + } + } + vsegments.clear(); + } + + // reset userdata: + for(fe=ioEdges.begin(), fend=ioEdges.end(); + fe!=fend; + fe++) + (*fe)->userdata = NULL; + + // list containing the new edges resulting from splitting operations. + vector<FEdge*> newEdges; + + // retrieve the intersected edges: + vector<segment* >& iedges = SL.intersectedEdges(); + // retrieve the intersections: + vector<intersection*>& intersections = SL.intersections(); + + int id=0; + // create a view vertex for each intersection and linked this one + // with the intersection object + vector<intersection*>::iterator i, iend; + for(i=intersections.begin(),iend=intersections.end(); + i!=iend; + i++) + { + FEdge *fA = (*i)->EdgeA->edge(); + FEdge *fB = (*i)->EdgeB->edge(); + + Vec3r A1 = fA->vertexA()->point3D(); + Vec3r A2 = fA->vertexB()->point3D(); + Vec3r B1 = fB->vertexA()->point3D(); + Vec3r B2 = fB->vertexB()->point3D(); + + Vec3r a1 = fA->vertexA()->point2D(); + Vec3r a2 = fA->vertexB()->point2D(); + Vec3r b1 = fB->vertexA()->point2D(); + Vec3r b2 = fB->vertexB()->point2D(); + + real ta = (*i)->tA; + real tb = (*i)->tB; + + if((ta < -epsilon) || (ta > 1+epsilon)) + cerr << "Warning: intersection out of range for edge " << fA->vertexA()->getId() << " - " << fA->vertexB()->getId() << endl; + + if((tb < -epsilon) || (tb > 1+epsilon)) + cerr << "Warning: intersection out of range for edge " << fB->vertexA()->getId() << " - " << fB->vertexB()->getId() << endl; + + real Ta = SilhouetteGeomEngine::ImageToWorldParameter(fA, ta); + real Tb = SilhouetteGeomEngine::ImageToWorldParameter(fB, tb); + + TVertex * tvertex = ioViewMap->CreateTVertex(Vec3r(A1 + Ta*(A2-A1)), Vec3r(a1 + ta*(a2-a1)), fA, + Vec3r(B1 + Tb*(B2-B1)), Vec3r(b1 + tb*(b2-b1)), fB, id); + + (*i)->userdata = tvertex; + ++id; + } + + progressBarStep = 0; + + if(progressBarDisplay) { + unsigned iEdgesSize = iedges.size(); + unsigned progressBarSteps = min(gProgressBarMaxSteps, iEdgesSize); + progressBarStep = iEdgesSize / progressBarSteps; + _pProgressBar->reset(); + _pProgressBar->setLabelText("Splitting intersected edges"); + _pProgressBar->setTotalSteps(progressBarSteps); + _pProgressBar->setProgress(0); + } + + counter = progressBarStep; + + vector<TVertex*> edgeVVertices; + vector<ViewEdge*> newVEdges; + vector<segment* >::iterator s, send; + for(s=iedges.begin(),send=iedges.end(); + s!=send; + s++) + { + edgeVVertices.clear(); + newEdges.clear(); + newVEdges.clear(); + + FEdge* fedge = (*s)->edge(); + ViewEdge *vEdge = fedge->viewedge(); + ViewShape *shape = vEdge->viewShape(); + + vector<intersection*>& eIntersections = (*s)->intersections(); + // we first need to sort these intersections from farther to closer to A + sort(eIntersections.begin(), eIntersections.end(), less_Intersection(*s)); + for(i=eIntersections.begin(),iend=eIntersections.end(); + i!=iend; + i++) + edgeVVertices.push_back((TVertex*)(*i)->userdata); + + shape->SplitEdge(fedge, edgeVVertices, ioViewMap->FEdges(), ioViewMap->ViewEdges()); + + if(progressBarDisplay) { + counter--; + if (counter <= 0) { + counter = progressBarStep; + _pProgressBar->setProgress(_pProgressBar->getProgress() + 1); + } + } + } + + // reset userdata: + for(fe=ioEdges.begin(), fend=ioEdges.end(); + fe!=fend; + fe++) + (*fe)->userdata = NULL; + + // delete segments + // if(!segments.empty()){ + // for(s=segments.begin(),send=segments.end(); + // s!=send; + // s++){ + // delete *s; + // } + // segments.clear(); + // } +} |