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Geometry serialization (#71)

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Serialize geometry to IFC instances directly from a TopoDS_Shape
This commit is contained in:
Thomas Krijnen
2016-06-22 15:03:18 +02:00
committed by GitHub
parent 90ad3a4a93
commit aebb9e324b
18 changed files with 1161 additions and 206 deletions
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src/ifcgeom/IfcGeomRepresentation.h
+43 -1
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@@ -259,7 +259,8 @@ namespace IfcGeom {
if (num_faces == 0) {
// Edges are only emitted if there are no faces. A mixed representation of faces
// and loose edges is discouraged by the standard. An alternative would be to use
// TopExp::MapShapesAndAncestors() to find edges that do not belong to any face.
// TopExp_Explorer texp(s, TopAbs_EDGE, TopAbs_FACE) to find edges that do not
// belong to any face.
for (TopExp_Explorer texp(s, TopAbs_EDGE); texp.More(); texp.Next()) {
BRepAdaptor_Curve crv(TopoDS::Edge(texp.Current()));
GCPnts_QuasiUniformDeflection tessellater(crv, settings().deflection_tolerance());
@@ -267,6 +268,40 @@ namespace IfcGeom {
int start = (int)_verts.size() / 3;
for (int i = 1; i <= n; ++i) {
gp_XYZ p = tessellater.Value(i).XYZ();
/*
// In case you want direction arrows on your edges
double u = tessellater.Parameter(i);
gp_XYZ p2, p3;
gp_Pnt tmp;
gp_Vec tmp2;
crv.D1(u, tmp, tmp2);
gp_Dir d1, d2, d3, d4;
d1 = tmp2;
if (texp.Current().Orientation() == TopAbs_REVERSED) {
d1 = -d1;
}
if (fabs(d1.Z()) < 0.5) {
d2 = d1.Crossed(gp::DZ());
} else {
d2 = d1.Crossed(gp::DY());
}
d3 = d1.XYZ() + d2.XYZ();
d4 = d1.XYZ() - d2.XYZ();
p2 = p - d3.XYZ() / 10.;
p3 = p - d4.XYZ() / 10.;
trsf.Transforms(p2);
trsf.Transforms(p3);
_material_ids.push_back(surface_style_id);
_material_ids.push_back(surface_style_id);
_verts.push_back(static_cast<P>(p2.X()));
_verts.push_back(static_cast<P>(p2.Y()));
_verts.push_back(static_cast<P>(p2.Z()));
_verts.push_back(static_cast<P>(p3.X()));
_verts.push_back(static_cast<P>(p3.Y()));
_verts.push_back(static_cast<P>(p3.Z()));
*/
trsf.Transforms(p);
_material_ids.push_back(surface_style_id);
@@ -278,7 +313,14 @@ namespace IfcGeom {
if (i > 1) {
_edges.push_back(start + i - 2);
_edges.push_back(start + i - 1);
// _edges.push_back(start + 3 * (i - 2) + 2);
// _edges.push_back(start + 3 * (i - 1) + 2);
}
// _edges.push_back(start + 3 * (i - 1) + 0);
// _edges.push_back(start + 3 * (i - 1) + 2);
// _edges.push_back(start + 3 * (i - 1) + 1);
// _edges.push_back(start + 3 * (i - 1) + 2);
}
}
}