public static TriangleMesh Process(TopoDSShape shapeFused)
{
var result = new TriangleMesh();
var builder = new BRepBuilder();
var comp = new TopoDSCompound();
builder.MakeCompound(comp);
BRepMesh.Mesh(shapeFused, 1);
var ex = new TopExpExplorer(shapeFused,
TopAbsShapeEnum.TopAbs_FACE,
TopAbsShapeEnum.TopAbs_SHAPE);
while (ex.More)
{
var shapeResult = new TriangleMesh();
var face = TopoDS.Face(ex.Current);
var location = new TopLocLocation();
var facing = BRepTool.Triangulation(face, location);
var tab = new TColgpArray1OfPnt(1, facing.NbNodes);
// facing.Nodes(tab);
var tri = new PolyArray1OfTriangle(1, facing.NbTriangles);
// facing.Triangles(tri);
var triCount = facing.NbTriangles;
var listPoints = new List <Point3D>();
for (var i = 1; i <= triCount; i++)
{
var trian = tri.Value(i);
int index1 = 0, index2 = 0, index3 = 0;
trian.Get(ref index1, ref index2, ref index3);
var firstPoint = new Point3D(tab.Value(index1));
var secondPoint = new Point3D(tab.Value(index2));
var thirdPoint = new Point3D(tab.Value(index3));
listPoints.Add(firstPoint);
listPoints.Add(secondPoint);
listPoints.Add(thirdPoint);
}
shapeResult.Points.Clear();
foreach (var point in listPoints)
{
shapeResult.Points.Add(point);
}
shapeResult.Points = GeomUtils.SortAndCompactListPoints(shapeResult.Points);
var triangleIndex = 0;
var triangleArray = new int[3];
foreach (var point in listPoints)
{
triangleArray[triangleIndex] = shapeResult.ComputePointId(point);
triangleIndex = (triangleIndex + 1) % 3;
if (triangleIndex == 0)
{
shapeResult.AddTriangle(triangleArray);
}
}
ex.Next();
result = result.Combine(shapeResult);
}
return(result);
}
/// <summary>
/// Makes a list with the coliding candidates, generates a hidden fused face from them
/// then generates visible face nodes pointing to the fused shapes
/// </summary>
public static List <Node> UpdateFaces(Document _document, List <Node> _candidates)
{
_generated.Clear();
var colidingShapes = new List <Node>();
DetectColidingCandidates(_candidates, colidingShapes);
CreateFusedShape(colidingShapes, _document);
int faceNumber;
var faceExplorer = new TopExpExplorer();
// Build SubShapes with the Faces resulted after intersecting the candidates
if (_nodeFused != null)
{
var bigFace = _nodeFused.Get <TopoDsShapeInterpreter>().Shape;
faceNumber = 1;
faceExplorer.Init(bigFace, TopAbsShapeEnum.TopAbs_FACE, TopAbsShapeEnum.TopAbs_SHAPE);
while (faceExplorer.More)
{
var _faceNode = BuildSubShape(_document, _nodeFused, TopAbsShapeEnum.TopAbs_FACE, faceNumber, true);
_generated.Add(_faceNode);
faceNumber++;
faceExplorer.Next();
}
}
var nonAdjacent = _candidates.Except(colidingShapes);
foreach (var independent in nonAdjacent)
{
faceNumber = 1;
var shape = independent.Get <TopoDsShapeInterpreter>().Shape;
faceExplorer = new TopExpExplorer();
faceExplorer.Init(shape, TopAbsShapeEnum.TopAbs_FACE, TopAbsShapeEnum.TopAbs_SHAPE);
while (faceExplorer.More)
{
var _faceNode = BuildSubShape(_document, independent, TopAbsShapeEnum.TopAbs_FACE, faceNumber, true);
_generated.Add(_faceNode);
faceNumber++;
faceExplorer.Next();
}
}
if (_nodeFused != null)
{
_document.Root.Remove(_nodeFused.Index);
}
return(_generated);
}
public static TopoDSShape ExtractSubShape(
TopoDSShape originalShape,
int facePosition,
TopAbsShapeEnum shapeType)
{
if (originalShape == null)
{
return(null);
}
// Find the face
var baseEx = new TopExpExplorer();
baseEx.Init(originalShape, shapeType, TopAbsShapeEnum.TopAbs_SHAPE);
while (baseEx.More && (facePosition != 1))
{
baseEx.Next();
facePosition--;
}
//if (!baseEx.More())
// return null;
TopoDSShape shape = null;
switch (shapeType)
{
case TopAbsShapeEnum.TopAbs_VERTEX:
shape = TopoDS.Vertex(baseEx.Current);
break;
case TopAbsShapeEnum.TopAbs_EDGE:
shape = TopoDS.Edge(baseEx.Current);
break;
case TopAbsShapeEnum.TopAbs_WIRE:
shape = TopoDS.Wire(baseEx.Current);
break;
case TopAbsShapeEnum.TopAbs_FACE:
shape = TopoDS.Face(baseEx.Current);
break;
case TopAbsShapeEnum.TopAbs_SOLID:
case TopAbsShapeEnum.TopAbs_COMPOUND:
return(originalShape);
}
return(shape);
}
private static TopoDSShape ApplyFillet(double thickness, TopoDSShape body, int edgeNumber, int operationType)
{
try
{
// Create fillet
var aEdgeExplorer = new TopExpExplorer(body, TopAbsShapeEnum.TopAbs_EDGE,
TopAbsShapeEnum.TopAbs_SHAPE);
var number = 1;
TopoDSShape shape = null;
while (aEdgeExplorer.More)
{
if ((edgeNumber == 0) || (edgeNumber == number))
{
var anEdge = TopoDS.Edge(aEdgeExplorer.Current);
if (operationType == (int)FilletChamferTypes.SimpleFillet)
{
var fillet = new BRepFilletAPIMakeFillet(body, ChFi3dFilletShape.ChFi3d_Rational);
// Add edge to fillet algorithm
fillet.Add(thickness, anEdge);
// Check if valid contour
try
{
if (fillet.StripeStatus(fillet.Contour(anEdge)) != ChFiDSErrorStatus.ChFiDS_Ok)
{
return(null);
}
}
catch (Exception)
{
Log.Info("Exception on applying fillet");
}
shape = fillet.Shape;
}
else
{
var chamfer = new BRepFilletAPIMakeChamfer(body);
var aMap = new TopToolsIndexedDataMapOfShapeListOfShape(1);
TopExp.MapShapesAndAncestors(body, TopAbsShapeEnum.TopAbs_EDGE, TopAbsShapeEnum.TopAbs_FACE,
aMap);
// Locate an ancestor face
for (var i = 1; i < aMap.Extent; i++)
{
var localEdge = TopoDS.Edge(aMap.FindKey(i));
if (!anEdge.IsSame(localEdge))
{
continue;
}
// We found an ancestor face
var face = TopoDS.Face(aMap.FindFromIndex(i).First);
// Add the edge and face on the chmafer algorithm
chamfer.Add(thickness, thickness, anEdge, face);
}
shape = chamfer.Shape;
}
}
aEdgeExplorer.Next();
number++;
}
// Check the shape validity
if ((shape == null) || (shape.IsNull))
{
return(null);
}
return(shape);
}
catch (Exception ex)
{
Log.Info("Apply fillet error: " + ex.Message);
}
return(null);
}