public static void LoadBrepFile(string fileName, Document document)
{
var aSequence = new TopToolsHSequenceOfShape();
var aShape = new TopoDSShape();
var aBuilder = new BRepBuilder();
var result = BRepTools.Read(aShape, fileName, aBuilder, null);
if (result)
{
if (!BRepAlgo.IsValid(aShape))
{
// Warning: The shape is not valid!
}
else
{
aSequence.Append(aShape);
}
}
if (aSequence.IsEmpty)
{
return;
}
document.Transact();
for (var i = 1; i <= aSequence.Length; i++)
{
var aisShape = aSequence.Value(i);
var builder = new NodeBuilder(document, FunctionNames.Mesh);
builder[0].Shape = aisShape;
builder.ExecuteFunction();
}
document.Commit("Added to scene filename: " + fileName);
}
public static gp_Dir ComputeNormal(this TopoDS_Face face)
{
double umin = 0, umax = 0, vmin = 0, vmax = 0;
BRepTools.UVBounds(face, ref umin, ref umax, ref vmin, ref vmax);
var surface = BRep_Tool.Surface(face);
var props = new GeomLProp_SLProps(surface, umin, vmin, 1.0, 1e-1);
return(props.Normal());
}
public static UVBounds UVBounds(this TopoDS_Face face)
{
var umin = 0.0;
var umax = 0.0;
var vmin = 0.0;
var vmax = 0.0;
BRepTools.UVBounds(face, ref umin, ref umax, ref vmin, ref vmax);
return(new UVBounds(umin, umax, vmin, vmax));
}
//--------------------------------------------------------------------------------------------------
public static Ax1 GetFaceCenterNormal(TopoDS_Face face)
{
double umin = 0, umax = 0, vmin = 0, vmax = 0;
BRepTools.UVBounds(face, ref umin, ref umax, ref vmin, ref vmax);
var props = new BRepGProp_Face(face);
Pnt position = new Pnt();
Vec normal = new Vec();
props.Normal((umin + umax) / 2.0, (vmin + vmax) / 2.0, ref position, ref normal);
return(new Ax1(position, normal.ToDir()));
}
//--------------------------------------------------------------------------------------------------
public static bool RenderFaces(IDrawingRenderer renderer, TopoDS_Shape brepShape)
{
var res = true;
renderer.BeginPath();
var faces = brepShape.Faces();
if (faces.Count == 0)
{
// Drawings may only contain lines, not faces
res = RenderEdges(renderer, brepShape.Edges(), null);
}
else
{
foreach (var face in faces)
{
var outerWire = BRepTools.OuterWire(face);
if (outerWire == null)
{
continue;
}
res &= RenderEdges(renderer, outerWire.Edges(), face);
var wires = face.Wires();
foreach (var wire in wires)
{
if (wire.IsEqual(outerWire))
{
continue;
}
res &= RenderEdges(renderer, wire.Edges(), face);
}
}
}
renderer.EndPath();
return(res);
}
//--------------------------------------------------------------------------------------------------
bool _HasTriangulation(TopoDS_Shape shape)
{
var faces = shape.Faces();
return(faces.Any(face => BRepTools.Triangulation(face, Precision.Infinite())));
}
//--------------------------------------------------------------------------------------------------
SvgGroupElement _ExportLayer(VectorExportLayer layer)
{
if (_Styles == null || !_Styles.TryGetValue(layer.Type, out var lineStyle))
{
return(null);
}
CurrentGroup = new SvgGroupElement
{
ID = layer.Name,
Style = lineStyle
};
if (layer.BRep == null)
{
return(null);
}
if (_Template == VectorExportTemplate.Contours)
{
CurrentGroup.IsLayer = true;
}
CurrentPath = null;
if (_Template == VectorExportTemplate.Drawing)
{
// Drawings do only contain lines
CombineToPath = false;
_ExportEdges(layer.BRep.Edges(), null);
}
else
{
CombineToPath = layer.Type.HasFlag(VectorExportLayerType.Filled);
var faces = layer.BRep.Faces();
foreach (var face in faces)
{
var outerWire = BRepTools.OuterWire(face);
if (outerWire == null)
{
continue;
}
_ExportEdges(outerWire.Edges(), face);
var wires = face.Wires();
foreach (var wire in wires)
{
if (wire.IsEqual(outerWire))
{
continue;
}
_ExportEdges(wire.Edges(), face);
}
FinalizePath();
}
}
if (CurrentGroup.Children.Any())
{
return(CurrentGroup);
}
return(null);
}
