void FEdgeXDetector::ProcessSilhouetteEdge(WXEdge *iEdge, bool meshSilhouettes)
{
if(iEdge->nature() & Nature::BORDER)
return;
// SILHOUETTE ?
//-------------
WXFace * fA = (WXFace *)iEdge->GetaOEdge()->GetaFace();
WXFace * fB = (WXFace *)iEdge->GetaOEdge()->GetbFace();
if((fA->front(_useConsistency))^(fB->front(_useConsistency))){ // fA->visible XOR fB->visible (true if one is 0 and the other is 1)
// Freestyle is using a hack here to determine if these faces are "smooth" or "sharp." Specifically,
// if the normals disagree at a vertex, then it must be "sharp." This hack broke with the bunny triangle mesh that had planar
// faces in one version. New hack includes more tests...
if(!meshSilhouettes &&
fA->GetVertexNormal(iEdge->GetaVertex()) == fB->GetVertexNormal(iEdge->GetaVertex()) &&
fA->GetVertexNormal(iEdge->GetbVertex()) == fB->GetVertexNormal(iEdge->GetbVertex()) &&
fA->GetVertexNormal(iEdge->GetaVertex()) != fA->GetVertexNormal(iEdge->GetbVertex()))
// Aaron: added second and third conditions
{
// Vec3r Aa = fA->GetVertexNormal(iEdge->GetaVertex());
// Vec3r Ba = fB->GetVertexNormal(iEdge->GetaVertex());
// Vec3r Ab = fA->GetVertexNormal(iEdge->GetbVertex());
// Vec3r Bb = fB->GetVertexNormal(iEdge->GetbVertex());
// printf("Non-silhouette detected\n");
// printf("%f %f %f, %f %f %f\n", Aa[0], Aa[1], Aa[2], Ba[0], Ba[1], Ba[2]);
// printf("%f %f %f, %f %f %f\n", Ab[0], Ab[1], Ab[2], Bb[0], Bb[1], Bb[2]);
return;
}
iEdge->AddNature(Nature::SILHOUETTE);
if(fB->front(_useConsistency))
iEdge->SetOrder(1);
else
iEdge->SetOrder(-1);
}
}
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);
}
}
