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Diffstat (limited to 'source/blender/freestyle/intern/view_map/FEdgeXDetector.cpp')
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diff --git a/source/blender/freestyle/intern/view_map/FEdgeXDetector.cpp b/source/blender/freestyle/intern/view_map/FEdgeXDetector.cpp new file mode 100644 index 00000000000..2ded242e9ea --- /dev/null +++ b/source/blender/freestyle/intern/view_map/FEdgeXDetector.cpp @@ -0,0 +1,761 @@ +/* + * ***** BEGIN GPL LICENSE BLOCK ***** + * + * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * The Original Code is Copyright (C) 2010 Blender Foundation. + * All rights reserved. + * + * The Original Code is: all of this file. + * + * Contributor(s): none yet. + * + * ***** END GPL LICENSE BLOCK ***** + */ + +/** \file blender/freestyle/intern/view_map/FEdgeXDetector.cpp + * \ingroup freestyle + * \brief Detects/flags/builds extended features edges on the WXEdge structure + * \author Stephane Grabli + * \date 26/10/2003 + */ + +#include <float.h> +#include <math.h> + +#include "FEdgeXDetector.h" + +#include "../geometry/GeomUtils.h" +#include "../geometry/normal_cycle.h" + +#include "BKE_global.h" + +void FEdgeXDetector::processShapes(WingedEdge& we) +{ + bool progressBarDisplay = false; + Vec3r Min, Max; + vector<WShape*> wshapes = we.getWShapes(); + WXShape *wxs; + + if (_pProgressBar != NULL) { + _pProgressBar->reset(); + _pProgressBar->setLabelText("Detecting feature lines"); + _pProgressBar->setTotalSteps(wshapes.size() * 3); + _pProgressBar->setProgress(0); + progressBarDisplay = true; + } + + for (vector<WShape*>::const_iterator it = wshapes.begin(); it != wshapes.end(); it++) { + if (_pRenderMonitor && _pRenderMonitor->testBreak()) + break; + wxs = dynamic_cast<WXShape*>(*it); + wxs->bbox(Min, Max); + _bbox_diagonal = (Max - Min).norm(); + if (_changes) { + vector<WFace*>& wfaces = wxs->GetFaceList(); + for (vector<WFace*>::iterator wf = wfaces.begin(), wfend = wfaces.end(); wf != wfend; ++wf) { + WXFace *wxf = dynamic_cast<WXFace*>(*wf); + wxf->Clear(); + } + _computeViewIndependant = true; + } + else if (!(wxs)->getComputeViewIndependantFlag()) { + wxs->Reset(); + _computeViewIndependant = false; + } + else { + _computeViewIndependant = true; + } + preProcessShape(wxs); + if (progressBarDisplay) + _pProgressBar->setProgress(_pProgressBar->getProgress() + 1); + processBorderShape(wxs); + if (_computeMaterialBoundaries) + processMaterialBoundaryShape(wxs); + processCreaseShape(wxs); + if (_computeRidgesAndValleys) + processRidgesAndValleysShape(wxs); + if (_computeSuggestiveContours) + processSuggestiveContourShape(wxs); + processSilhouetteShape(wxs); + processEdgeMarksShape(wxs); + if (progressBarDisplay) + _pProgressBar->setProgress(_pProgressBar->getProgress() + 1); + + // build smooth edges: + buildSmoothEdges(wxs); + + // Post processing for suggestive contours + if (_computeSuggestiveContours) + postProcessSuggestiveContourShape(wxs); + if (progressBarDisplay) + _pProgressBar->setProgress(_pProgressBar->getProgress() + 1); + + wxs->setComputeViewIndependantFlag(false); + _computeViewIndependant = false; + _changes = false; + + // reset user data + (*it)->ResetUserData(); + } +} + +// GENERAL STUFF +//////////////// +void FEdgeXDetector::preProcessShape(WXShape *iWShape) +{ + _meanK1 = 0; + _meanKr = 0; + _minK1 = FLT_MAX; + _maxK1 = -FLT_MAX; + _minKr = FLT_MAX; + _maxKr = -FLT_MAX; + _nPoints = 0; + _meanEdgeSize = iWShape->getMeanEdgeSize(); + + vector<WFace*>& wfaces = iWShape->GetFaceList(); + vector<WFace*>::iterator f, fend; + // view dependant stuff + for (f = wfaces.begin(), fend = wfaces.end(); f != fend; ++f) { + preProcessFace((WXFace*)(*f)); + } + + if (_computeRidgesAndValleys || _computeSuggestiveContours) { + vector<WVertex*>& wvertices = iWShape->getVertexList(); + for (vector<WVertex*>::iterator wv = wvertices.begin(), wvend = wvertices.end(); wv != wvend; ++wv) { + // Compute curvatures + WXVertex *wxv = dynamic_cast<WXVertex*>(*wv); + computeCurvatures(wxv); + } + _meanK1 /= (real)(_nPoints); + _meanKr /= (real)(_nPoints); + } +} + +void FEdgeXDetector::preProcessFace(WXFace *iFace) +{ + Vec3r firstPoint = iFace->GetVertex(0)->GetVertex(); + Vec3r N = iFace->GetNormal(); + + // Compute the dot product between V (=_Viewpoint - firstPoint) and N: + Vec3r V; + if (_orthographicProjection) { + V = Vec3r(0.0, 0.0, _Viewpoint.z() - firstPoint.z()); + } + else { + V = Vec3r(_Viewpoint - firstPoint); + } + N.normalize(); + V.normalize(); + iFace->setDotP(N * V); + + // compute the distance between the face center and the viewpoint: + if (_orthographicProjection) { + iFace->setZ(iFace->center().z() - _Viewpoint.z()); + } + else { + Vec3r dist_vec(iFace->center() - _Viewpoint); + iFace->setZ(dist_vec.norm()); + } +} + +void FEdgeXDetector::computeCurvatures(WXVertex *vertex) +{ + // TODO: for some reason, the 'vertex' may have no associated edges + // (i.e., WVertex::_EdgeList is empty), which causes a crash due to + // a subsequent call of WVertex::_EdgeList.front(). + if (vertex->GetEdges().empty()) { + if (G.debug & G_DEBUG_FREESTYLE) { + printf("Warning: WVertex %d has no associated edges.\n", vertex->GetId()); + } + return; + } + + // CURVATURE LAYER + // store all the curvature datas for each vertex + + //soc unused - real K1, K2 + real cos2theta, sin2theta; + Vec3r e1, n, v; + // one vertex curvature info : + CurvatureInfo *C; + float radius = _sphereRadius * _meanEdgeSize; + + // view independant stuff + if (_computeViewIndependant) { + C = new CurvatureInfo(); + vertex->setCurvatures(C); + OGF::NormalCycle ncycle; + ncycle.begin(); + if (radius > 0) { + OGF::compute_curvature_tensor(vertex, radius, ncycle); + } + else { + OGF::compute_curvature_tensor_one_ring(vertex, ncycle); + } + ncycle.end(); + C->K1 = ncycle.kmin(); + C->K2 = ncycle.kmax(); + C->e1 = ncycle.Kmax(); //ncycle.kmin() * ncycle.Kmax(); + C->e2 = ncycle.Kmin(); //ncycle.kmax() * ncycle.Kmin(); + + real absK1 = fabs(C->K1); + _meanK1 += absK1; + if (absK1 > _maxK1) + _maxK1 = absK1; + if (absK1 < _minK1) + _minK1 = absK1; + } + // view dependant + C = vertex->curvatures(); + if (C == 0) + return; + + // compute radial curvature : + n = C->e1 ^ C->e2; + if (_orthographicProjection) { + v = Vec3r(0.0, 0.0, _Viewpoint.z() - vertex->GetVertex().z()); + } + else { + v = Vec3r(_Viewpoint - vertex->GetVertex()); + } + C->er = v - (v * n) * n; + C->er.normalize(); + e1 = C->e1; + e1.normalize(); + cos2theta = C->er * e1; + cos2theta *= cos2theta; + sin2theta = 1 - cos2theta; + C->Kr = C->K1 * cos2theta + C->K2 * sin2theta; + real absKr = fabs(C->Kr); + _meanKr += absKr; + if (absKr > _maxKr) + _maxKr = absKr; + if (absKr < _minKr) + _minKr = absKr; + + ++_nPoints; +} + +// SILHOUETTE +///////////// +void FEdgeXDetector::processSilhouetteShape(WXShape *iWShape) +{ + // Make a first pass on every polygons in order to compute all their silhouette relative values: + vector<WFace*>& wfaces = iWShape->GetFaceList(); + vector<WFace*>::iterator f, fend; + for (f = wfaces.begin(), fend = wfaces.end(); f != fend; ++f) { + ProcessSilhouetteFace((WXFace*)(*f)); + } + + // Make a pass on the edges to detect the silhouette edges that are not smooth + vector<WEdge*>::iterator we, weend; + vector<WEdge*> &wedges = iWShape->getEdgeList(); + for (we = wedges.begin(), weend = wedges.end(); we != weend; ++we) { + ProcessSilhouetteEdge((WXEdge*)(*we)); + } +} + +void FEdgeXDetector::ProcessSilhouetteFace(WXFace *iFace) +{ + // SILHOUETTE LAYER + Vec3r normal; + // Compute the dot products between View direction and N at each vertex of the face: + Vec3r point; + int closestPointId = 0; + real dist, minDist = FLT_MAX; + int numVertices = iFace->numberOfVertices(); + WXFaceLayer *faceLayer = new WXFaceLayer(iFace, Nature::SILHOUETTE, true); + for (int i = 0; i < numVertices; i++) { + point = iFace->GetVertex(i)->GetVertex(); + normal = iFace->GetVertexNormal(i); + normal.normalize(); + Vec3r V; + if (_orthographicProjection) { + V = Vec3r(0.0, 0.0, _Viewpoint.z() - point.z()); + } + else { + V = Vec3r(_Viewpoint - point); + } + V.normalize(); + real d = normal * V; + faceLayer->PushDotP(d); + // Find the point the closest to the viewpoint + if (_orthographicProjection) { + dist = point.z() - _Viewpoint.z(); + } + else { + Vec3r dist_vec(point - _Viewpoint); + dist = dist_vec.norm(); + } + if (dist < minDist) { + minDist = dist; + closestPointId = i; + } + } + // Set the closest point id: + faceLayer->setClosestPointIndex(closestPointId); + // Add this layer to the face: + iFace->AddSmoothLayer(faceLayer); +} + +void FEdgeXDetector::ProcessSilhouetteEdge(WXEdge *iEdge) +{ + if (iEdge->nature() & Nature::BORDER) + return; + // SILHOUETTE ? + //------------- + WXFace *fA = (WXFace *)iEdge->GetaOEdge()->GetaFace(); + WXFace *fB = (WXFace *)iEdge->GetaOEdge()->GetbFace(); + + if ((fA->front()) ^ (fB->front())) { // fA->visible XOR fB->visible (true if one is 0 and the other is 1) + // The only edges we want to set as silhouette edges in this way are the ones with 2 different normals for 1 vertex + // for these two faces + //-------------------- + // In reality we only test the normals for 1 of the 2 vertices. + if (fA->GetVertexNormal(iEdge->GetaVertex()) == fB->GetVertexNormal(iEdge->GetaVertex())) + return; + iEdge->AddNature(Nature::SILHOUETTE); + if (fB->front()) + iEdge->setOrder(1); + else + iEdge->setOrder(-1); + } +} + +// BORDER +///////// +void FEdgeXDetector::processBorderShape(WXShape *iWShape) +{ + if (!_computeViewIndependant) + return; + // Make a pass on the edges to detect the BORDER + vector<WEdge*>::iterator we, weend; + vector<WEdge*> &wedges = iWShape->getEdgeList(); + for (we = wedges.begin(), weend = wedges.end(); we != weend; ++we) { + ProcessBorderEdge((WXEdge *)(*we)); + } +} + +void FEdgeXDetector::ProcessBorderEdge(WXEdge *iEdge) +{ + // first check whether it is a border edge: BORDER ? + //--------- + if (iEdge->GetaFace() == 0) { + // it is a border edge + iEdge->AddNature(Nature::BORDER); + } +} + + +// CREASE +///////// +void FEdgeXDetector::processCreaseShape(WXShape *iWShape) +{ + if (!_computeViewIndependant) + return; + + // Make a pass on the edges to detect the CREASE + vector<WEdge*>::iterator we, weend; + vector<WEdge*> &wedges = iWShape->getEdgeList(); + for (we = wedges.begin(), weend = wedges.end(); we != weend; ++we) { + ProcessCreaseEdge((WXEdge *)(*we)); + } +} + +void FEdgeXDetector::ProcessCreaseEdge(WXEdge *iEdge) +{ + // CREASE ? + //--------- + if (iEdge->nature() & Nature::BORDER) + return; + WXFace *fA = (WXFace *)iEdge->GetaOEdge()->GetaFace(); + WXFace *fB = (WXFace *)iEdge->GetaOEdge()->GetbFace(); + + WVertex *aVertex = iEdge->GetaVertex(); + if ((fA->GetVertexNormal(aVertex) * fB->GetVertexNormal(aVertex)) <= _creaseAngle) + iEdge->AddNature(Nature::CREASE); +} + +// RIDGES AND VALLEYS +///////////////////// +void FEdgeXDetector::processRidgesAndValleysShape(WXShape *iWShape) +{ + // Don't forget to add the built layer to the face at the end of the ProcessFace: + //iFace->AddSmoothLayer(faceLayer); + + if (!_computeViewIndependant) + return; + + // Here the curvatures must already have been computed + vector<WFace*>& wfaces = iWShape->GetFaceList(); + vector<WFace*>::iterator f, fend; + for (f = wfaces.begin(), fend = wfaces.end(); f != fend; ++f) { + ProcessRidgeFace((WXFace*)(*f)); + } +} + + +// RIDGES +///////// +void FEdgeXDetector::ProcessRidgeFace(WXFace *iFace) +{ + WXFaceLayer *flayer = new WXFaceLayer(iFace, Nature::RIDGE|Nature::VALLEY, false); + iFace->AddSmoothLayer(flayer); + + unsigned int numVertices = iFace->numberOfVertices(); + for (unsigned int i = 0; i < numVertices; ++i) { + WVertex *wv = iFace->GetVertex(i); + WXVertex *wxv = dynamic_cast<WXVertex*>(wv); + flayer->PushDotP(wxv->curvatures()->K1); + } + + real threshold = 0; + //real threshold = _maxK1 - (_maxK1 - _meanK1) / 20.0; + + if (flayer->nPosDotP() != numVertices) { + if ((fabs(flayer->dotP(0)) < threshold) && (fabs(flayer->dotP(1)) < threshold) && + (fabs(flayer->dotP(2)) < threshold)) + { + flayer->ReplaceDotP(0, 0); + flayer->ReplaceDotP(1, 0); + flayer->ReplaceDotP(2, 0); + } + } +} + +#if 0 +void FEdgeXDetector::ProcessRidgeFace(WXFace *iFace) +{ + // RIDGE LAYER + // Compute the RidgeFunction, that is the derivative of the ppal curvature along e1 at each vertex of the face + WVertex *v; + Vec3r v1v2; + real t; + vector<WXFaceLayer*> SmoothLayers; + WXFaceLayer *faceLayer; + Face_Curvature_Info *layer_info; + real K1_a(0), K1_b(0); + Vec3r Inter_a, Inter_b; + + // find the ridge layer of the face + iFace->retrieveSmoothLayers(Nature::RIDGE, SmoothLayers); + if ( SmoothLayers.size()!=1 ) + return; + faceLayer = SmoothLayers[0]; + // retrieve the curvature info of this layer + layer_info = (Face_Curvature_Info *)faceLayer->userdata; + + int numVertices = iFace->numberOfVertices(); + for (int i = 0; i < numVertices; i++) { + v = iFace->GetVertex(i); + // vec_curvature_info[i] contains the curvature info of this vertex + Vec3r e2 = layer_info->vec_curvature_info[i]->K2*layer_info->vec_curvature_info[i]->e2; + Vec3r e1 = layer_info->vec_curvature_info[i]->K1*layer_info->vec_curvature_info[i]->e1; + e2.normalize(); + + WVertex::face_iterator fit = v->faces_begin(); + WVertex::face_iterator fitend = v->faces_end(); + for (; fit != fitend; ++fit) { + WXFace *wxf = dynamic_cast<WXFace*>(*fit); + WOEdge *oppositeEdge; + if (!(wxf->getOppositeEdge(v, oppositeEdge))) + continue; + v1v2 = oppositeEdge->GetbVertex()->GetVertex() - oppositeEdge->GetaVertex()->GetVertex(); + GeomUtils::intersection_test res; + res = GeomUtils::intersectRayPlane(oppositeEdge->GetaVertex()->GetVertex(), v1v2, e2, -(v->GetVertex()*e2), + t, 1.0e-06); + if ((res == GeomUtils::DO_INTERSECT) && (t >= 0.0) && (t <= 1.0)) { + vector<WXFaceLayer*> second_ridge_layer; + wxf->retrieveSmoothLayers(Nature::RIDGE, second_ridge_layer); + if (second_ridge_layer.size() != 1) + continue; + Face_Curvature_Info *second_layer_info = (Face_Curvature_Info*)second_ridge_layer[0]->userdata; + + unsigned index1 = wxf->GetIndex(oppositeEdge->GetaVertex()); + unsigned index2 = wxf->GetIndex(oppositeEdge->GetbVertex()); + real K1_1 = second_layer_info->vec_curvature_info[index1]->K1; + real K1_2 = second_layer_info->vec_curvature_info[index2]->K1; + real K1 = (1.0 - t) * K1_1 + t * K1_2; + Vec3r inter((1.0 - t) * oppositeEdge->GetaVertex()->GetVertex() + + t * oppositeEdge->GetbVertex()->GetVertex()); + Vec3r vtmp(inter - v->GetVertex()); + // is it K1_a or K1_b ? + if (vtmp * e1 > 0) { + K1_b = K1; + Inter_b = inter; + } + else { + K1_a = K1; + Inter_a = inter; + } + } + } + // Once we have K1 along the the ppal direction compute the derivative : K1b - K1a put it in DotP + //real d = fabs(K1_b) - fabs(K1_a); + real d = 0; + real threshold = _meanK1 + (_maxK1 - _meanK1) / 7.0; + //real threshold = _meanK1; + //if ((fabs(K1_b) > threshold) || ((fabs(K1_a) > threshold))) + d = (K1_b) - (K1_a) / (Inter_b - Inter_a).norm(); + faceLayer->PushDotP(d); + //faceLayer->PushDotP(layer_info->vec_curvature_info[i]->K1); + } + + // Make the values relevant by checking whether all principal directions have the "same" direction: + Vec3r e0((layer_info->vec_curvature_info[0]->K1 * layer_info->vec_curvature_info[0]->e1)); + e0.normalize(); + Vec3r e1((layer_info->vec_curvature_info[1]->K1 * layer_info->vec_curvature_info[1]->e1)); + e1.normalize(); + Vec3r e2((layer_info->vec_curvature_info[2]->K1 * layer_info->vec_curvature_info[2]->e1)); + e2.normalize(); + if (e0 * e1 < 0) + // invert dotP[1] + faceLayer->ReplaceDotP(1, -faceLayer->dotP(1)); + if (e0 * e2 < 0) + // invert dotP[2] + faceLayer->ReplaceDotP(2, -faceLayer->dotP(2)); + +#if 0 // remove the weakest values; + real minDiff = (_maxK1 - _minK1) / 10.0; + real minDiff = _meanK1; + if ((faceLayer->dotP(0) < minDiff) && (faceLayer->dotP(1) < minDiff) && (faceLayer->dotP(2) < minDiff)) { + faceLayer->ReplaceDotP(0, 0); + faceLayer->ReplaceDotP(1, 0); + faceLayer->ReplaceDotP(2, 0); + } +#endif +} +#endif + +// SUGGESTIVE CONTOURS +////////////////////// + +void FEdgeXDetector::processSuggestiveContourShape(WXShape *iWShape) +{ + // Here the curvatures must already have been computed + vector<WFace*>& wfaces = iWShape->GetFaceList(); + vector<WFace*>::iterator f, fend; + for (f = wfaces.begin(), fend = wfaces.end(); f != fend; ++f) { + ProcessSuggestiveContourFace((WXFace*)(*f)); + } +} + +void FEdgeXDetector::ProcessSuggestiveContourFace(WXFace *iFace) +{ + WXFaceLayer *faceLayer = new WXFaceLayer(iFace, Nature::SUGGESTIVE_CONTOUR, true); + iFace->AddSmoothLayer(faceLayer); + + unsigned int numVertices = iFace->numberOfVertices(); + for (unsigned int i = 0; i < numVertices; ++i) { + WVertex *wv = iFace->GetVertex(i); + WXVertex *wxv = dynamic_cast<WXVertex*>(wv); + faceLayer->PushDotP(wxv->curvatures()->Kr); + } + +#if 0 // FIXME: find a more clever way to compute the threshold + real threshold = _meanKr; + if (faceLayer->nPosDotP()!=numVertices) { + if ((fabs(faceLayer->dotP(0)) < threshold) && (fabs(faceLayer->dotP(1)) < threshold) && + (fabs(faceLayer->dotP(2)) < threshold)) { + faceLayer->ReplaceDotP(0, 0); + faceLayer->ReplaceDotP(1, 0); + faceLayer->ReplaceDotP(2, 0); + } + } +#endif +} + +void FEdgeXDetector::postProcessSuggestiveContourShape(WXShape *iShape) +{ + vector<WFace*>& wfaces = iShape->GetFaceList(); + vector<WFace*>::iterator f, fend; + for (f = wfaces.begin(), fend = wfaces.end(); f != fend; ++f) { + postProcessSuggestiveContourFace((WXFace*)(*f)); + } +} + +void FEdgeXDetector::postProcessSuggestiveContourFace(WXFace *iFace) +{ + // Compute the derivative of the radial curvature in the radial direction, at the two extremities of the smooth edge. + // If the derivative is smaller than a given threshold _kr_derivative_epsilon, discard the edge. + + // Find the suggestive contour layer of the face (zero or one edge). + vector<WXFaceLayer*> sc_layers; + iFace->retrieveSmoothEdgesLayers(Nature::SUGGESTIVE_CONTOUR, sc_layers); + if (sc_layers.empty()) + return; + + WXFaceLayer *sc_layer; + sc_layer = sc_layers[0]; + + // Compute the derivative value at each vertex of the face, and add it in a vector. + vector<real> kr_derivatives; + + unsigned vertices_nb = iFace->numberOfVertices(); + WXVertex *v, *opposite_vertex_a, *opposite_vertex_b; + WXFace *wxf; + WOEdge *opposite_edge; + Vec3r normal_vec, radial_normal_vec, er_vec, v_vec, inter, inter1, inter2, tmp_vec; + GeomUtils::intersection_test res; + real kr(0), kr1(0), kr2(0), t; + + for (unsigned int i = 0; i < vertices_nb; ++i) { + v = (WXVertex*)(iFace->GetVertex(i)); + + // v is a singular vertex, skip it. + if (v->isBoundary()) { + kr_derivatives.push_back(0); + continue; + } + + v_vec = v->GetVertex(); + er_vec = v->curvatures()->er; + + // For each vertex, iterate on its adjacent faces. + for (WVertex::face_iterator fit = v->faces_begin(), fitend = v->faces_end(); fit != fitend; ++fit) { + wxf = dynamic_cast<WXFace*>(*fit); + if (!wxf->getOppositeEdge(v, opposite_edge)) + continue; + + opposite_vertex_a = (WXVertex *)opposite_edge->GetaVertex(); + opposite_vertex_b = (WXVertex *)opposite_edge->GetbVertex(); + normal_vec = wxf->GetVertexNormal(v); // FIXME: what about e1 ^ e2 ? + radial_normal_vec = er_vec ^ normal_vec; + + // Test wether the radial plan intersects with the edge at the opposite of v. + res = GeomUtils::intersectRayPlane(opposite_vertex_a->GetVertex(), opposite_edge->GetVec(), + radial_normal_vec, -(v_vec * radial_normal_vec), + t, 1.0e-06); + + // If there is an intersection, compute the value of the derivative ath that point. + if ((res == GeomUtils::DO_INTERSECT) && (t >= 0) && (t <= 1)) { + kr = t * opposite_vertex_a->curvatures()->Kr + (1 - t) * opposite_vertex_b->curvatures()->Kr; + inter = opposite_vertex_a->GetVertex() + t * opposite_edge->GetVec(); + tmp_vec = inter - v->GetVertex(); + // Is it kr1 or kr2? + if (tmp_vec * er_vec > 0) { + kr2 = kr; + inter2 = inter; + } + else { + kr1 = kr; + inter1 = inter; + } + } + } + + // Now we have kr1 and kr2 along the radial direction, for one vertex of iFace. + // We have to compute the derivative of kr for that vertex, equal to: + // (kr2 - kr1) / dist(inter1, inter2). + // Then we add it to the vector of derivatives. + v->curvatures()->dKr = (kr2 - kr1) / (inter2 - inter1).norm(); + kr_derivatives.push_back(v->curvatures()->dKr); + } + + // At that point, we have the derivatives for each vertex of iFace. + // All we have to do now is to use linear interpolation to compute the values at the extremities of the smooth edge. + WXSmoothEdge *sc_edge = sc_layer->getSmoothEdge(); + WOEdge *sc_oedge = sc_edge->woea(); + t = sc_edge->ta(); + if (t * kr_derivatives[iFace->GetIndex(sc_oedge->GetaVertex())] + + (1 - t) * kr_derivatives[iFace->GetIndex(sc_oedge->GetbVertex())] < _kr_derivative_epsilon) + { + sc_layer->removeSmoothEdge(); + return; + } + sc_oedge = sc_edge->woeb(); + t = sc_edge->tb(); + if (t * kr_derivatives[iFace->GetIndex(sc_oedge->GetaVertex())] + + (1 - t) * kr_derivatives[iFace->GetIndex(sc_oedge->GetbVertex())] < _kr_derivative_epsilon) + { + sc_layer->removeSmoothEdge(); + } +} + +// MATERIAL_BOUNDARY +//////////////////// +void FEdgeXDetector::processMaterialBoundaryShape(WXShape *iWShape) +{ + if (!_computeViewIndependant) + return; + // Make a pass on the edges to detect material boundaries + vector<WEdge*>::iterator we, weend; + vector<WEdge*> &wedges = iWShape->getEdgeList(); + for (we = wedges.begin(), weend = wedges.end(); we != weend; ++we) { + ProcessMaterialBoundaryEdge((WXEdge*)(*we)); + } +} + +void FEdgeXDetector::ProcessMaterialBoundaryEdge(WXEdge *iEdge) +{ + // check whether the edge is a material boundary? + WFace *aFace = iEdge->GetaFace(); + WFace *bFace = iEdge->GetbFace(); + if (aFace && bFace && aFace->frs_materialIndex() != bFace->frs_materialIndex()) { + iEdge->AddNature(Nature::MATERIAL_BOUNDARY); + } +} + +// EDGE MARKS +///////////// +void FEdgeXDetector::processEdgeMarksShape(WXShape *iShape) +{ + // Make a pass on the edges to detect material boundaries + vector<WEdge*>::iterator we, weend; + vector<WEdge*> &wedges = iShape->getEdgeList(); + for (we = wedges.begin(), weend = wedges.end(); we != weend; ++we) { + ProcessEdgeMarks((WXEdge*)(*we)); + } +} + +void FEdgeXDetector::ProcessEdgeMarks(WXEdge *iEdge) +{ + if (iEdge->GetMark()) { + iEdge->AddNature(Nature::EDGE_MARK); + } +} + +// Build Smooth edges +///////////////////// +void FEdgeXDetector::buildSmoothEdges(WXShape *iShape) +{ + bool hasSmoothEdges = false; + + // Make a last pass to build smooth edges from the previous stored values: + //-------------------------------------------------------------------------- + vector<WFace*>& wfaces = iShape->GetFaceList(); + for (vector<WFace*>::iterator f = wfaces.begin(), fend = wfaces.end(); f != fend; ++f) { + vector<WXFaceLayer*>& faceLayers = ((WXFace*)(*f))->getSmoothLayers(); + for (vector<WXFaceLayer*>::iterator wxfl = faceLayers.begin(), wxflend = faceLayers.end(); + wxfl != wxflend; + ++wxfl) + { + if ((*wxfl)->BuildSmoothEdge()) + hasSmoothEdges = true; + } + } + + if (hasSmoothEdges && !_computeRidgesAndValleys && !_computeSuggestiveContours) { + vector<WVertex*>& wvertices = iShape->getVertexList(); + for (vector<WVertex*>::iterator wv = wvertices.begin(), wvend = wvertices.end(); wv != wvend; ++wv) { + // Compute curvatures + WXVertex *wxv = dynamic_cast<WXVertex*>(*wv); + computeCurvatures(wxv); + } + _meanK1 /= (real)(_nPoints); + _meanKr /= (real)(_nPoints); + } +} |