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add normals to webgui occ data

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This commit is contained in:
Matthias Hochsteger 2021-08-20 23:12:34 +02:00
parent 97c4fa724b
commit ab3801314c
1 changed files with 30 additions and 2 deletions
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32
libsrc/occ/python_occ_shapes.cpp
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@ -117,10 +117,13 @@ void ExtractEdgeData( const TopoDS_Edge & edge, int index, std::vector<double> *
}
}
void ExtractFaceData( const TopoDS_Face & face, int index, std::vector<double> * p, Box<3> & box )
void ExtractFaceData( const TopoDS_Face & face, int index, std::vector<double> * p, std::vector<double> * n, Box<3> & box )
{
TopLoc_Location loc;
Handle(Poly_Triangulation) triangulation = BRep_Tool::Triangulation (face, loc);
Handle(Geom_Surface) surf = BRep_Tool::Surface (face);
BRepAdaptor_Surface sf(face, Standard_False);
BRepLProp_SLProps prop(sf, 1, 1e-5);
bool flip = TopAbs_REVERSED == face.Orientation();
@ -135,17 +138,37 @@ void ExtractFaceData( const TopoDS_Face & face, int index, std::vector<double> *
{
Poly_Triangle triangle = (triangulation -> Triangles())(j);
std::array<Point<3>,3> pts;
std::array<Vec<3>,3> normals;
for (int k = 0; k < 3; k++)
pts[k] = occ2ng( (triangulation -> Nodes())(triangle(k+1)).Transformed(loc) );
for (int k = 0; k < 3; k++)
{
auto uv = (triangulation -> UVNodes())(triangle(k+1));
prop.SetParameters (uv.X(), uv.Y());
if (!prop.IsNormalDefined())
throw Exception("No normal defined on face");
auto normal = prop.Normal();
normals[k] = { normal.X(), normal.Y(), normal.Z() };
}
if(flip)
{
Swap(pts[1], pts[2]);
Swap(normals[1], normals[2]);
for (int k = 0; k < 3; k++)
normals[k] = -normals[k];
}
for (int k = 0; k < 3; k++)
{
box.Add(pts[k]);
for (int d = 0; d < 3; d++)
{
p[k].push_back( pts[k][d] );
n[k].push_back( normals[k][d] );
}
p[k].push_back( index );
}
}
@ -960,6 +983,7 @@ DLL_HEADER void ExportNgOCCShapes(py::module &m)
// triangulation = BRep_Tool::Triangulation (face, loc);
std::vector<double> p[3];
std::vector<double> n[3];
py::list names, colors;
int index = 0;
@ -969,7 +993,7 @@ DLL_HEADER void ExportNgOCCShapes(py::module &m)
{
TopoDS_Face face = TopoDS::Face(e.Current());
// Handle(TopoDS_Face) face = e.Current();
ExtractFaceData(face, index, p, box);
ExtractFaceData(face, index, p, n, box);
auto & props = OCCGeometry::global_shape_properties[face.TShape()];
if(props.col)
{
@ -1028,6 +1052,7 @@ DLL_HEADER void ExportNgOCCShapes(py::module &m)
data["draw_vol"] = false;
data["draw_surf"] = true;
data["funcdim"] = 0;
data["have_normals"] = true;
data["show_wireframe"] = true;
data["show_mesh"] = true;
data["Bezier_points"] = py::list{};
@ -1035,6 +1060,9 @@ DLL_HEADER void ExportNgOCCShapes(py::module &m)
points.append(p[0]);
points.append(p[1]);
points.append(p[2]);
points.append(n[0]);
points.append(n[1]);
points.append(n[2]);
data["Bezier_trig_points"] = points;
data["funcmin"] = 0;
data["funcmax"] = 1;