public static Surface GetSurface(this Face face)
{
switch (face)
{
case PlanarFace planarFace:
return(Plane.CreateByOriginAndBasis(planarFace.Origin, planarFace.XVector, planarFace.YVector));
case ConicalFace conicalFace:
{
var basisX = conicalFace.get_Radius(0).Normalize();
var basisY = conicalFace.get_Radius(1).Normalize();
var basisZ = conicalFace.Axis.Normalize();
return(ConicalSurface.Create(new Frame(conicalFace.Origin, basisX, basisY, basisZ), conicalFace.HalfAngle));
}
case CylindricalFace cylindricalFace:
{
double radius = cylindricalFace.get_Radius(0).GetLength();
var basisX = cylindricalFace.get_Radius(0).Normalize();
var basisY = cylindricalFace.get_Radius(1).Normalize();
var basisZ = cylindricalFace.Axis.Normalize();
return(CylindricalSurface.Create(new Frame(cylindricalFace.Origin, basisX, basisY, basisZ), radius));
}
case RevolvedFace revolvedFace:
{
var ECStoWCS = new Transform(Transform.Identity)
{
Origin = revolvedFace.Origin,
BasisX = revolvedFace.get_Radius(0).Normalize(),
BasisY = revolvedFace.get_Radius(1).Normalize(),
BasisZ = revolvedFace.Axis.Normalize()
};
var profileInWCS = revolvedFace.Curve.CreateTransformed(ECStoWCS);
return(RevolvedSurface.Create(new Frame(ECStoWCS.Origin, ECStoWCS.BasisX, ECStoWCS.BasisY, ECStoWCS.BasisZ), profileInWCS));
}
case RuledFace ruledFace:
{
var profileCurve0 = ruledFace.get_Curve(0);
var profileCurve1 = ruledFace.get_Curve(1);
return(RuledSurface.Create(profileCurve0, profileCurve1));
}
}
return(null);
}
/// <summary>
/// Create a cylinder to subtract from the cube.
/// </summary>
public BRepBuilder CreateBrepVoid()
{
// Naming convention for faces and edges: we
// assume that x is to the left and pointing down,
// y is horizontal and pointing to the right,
// z is up.
BRepBuilder b = new BRepBuilder(BRepType.Solid);
// The surfaces of the four faces.
Frame basis = new Frame(new XYZ(50, 0, 0), new XYZ(0, 1, 0), new XYZ(-1, 0, 0), new XYZ(0, 0, 1));
CylindricalSurface cylSurf = CylindricalSurface.Create(basis, 40);
Plane top1 = Plane.CreateByNormalAndOrigin(new XYZ(0, 0, 1), new XYZ(0, 0, 100)); // normal points outside the cylinder
Plane bottom1 = Plane.CreateByNormalAndOrigin(new XYZ(0, 0, 1), new XYZ(0, 0, 0)); // normal points inside the cylinder
// Add the four faces
BRepBuilderGeometryId frontCylFaceId = b.AddFace(BRepBuilderSurfaceGeometry.Create(cylSurf, null), false);
BRepBuilderGeometryId backCylFaceId = b.AddFace(BRepBuilderSurfaceGeometry.Create(cylSurf, null), false);
BRepBuilderGeometryId topFaceId = b.AddFace(BRepBuilderSurfaceGeometry.Create(top1, null), false);
BRepBuilderGeometryId bottomFaceId = b.AddFace(BRepBuilderSurfaceGeometry.Create(bottom1, null), true);
// Geometry for the four semi-circular edges and two vertical linear edges
BRepBuilderEdgeGeometry frontEdgeBottom = BRepBuilderEdgeGeometry.Create(Arc.Create(new XYZ(10, 0, 0), new XYZ(90, 0, 0), new XYZ(50, 40, 0)));
BRepBuilderEdgeGeometry backEdgeBottom = BRepBuilderEdgeGeometry.Create(Arc.Create(new XYZ(90, 0, 0), new XYZ(10, 0, 0), new XYZ(50, -40, 0)));
BRepBuilderEdgeGeometry frontEdgeTop = BRepBuilderEdgeGeometry.Create(Arc.Create(new XYZ(10, 0, 100), new XYZ(90, 0, 100), new XYZ(50, 40, 100)));
BRepBuilderEdgeGeometry backEdgeTop = BRepBuilderEdgeGeometry.Create(Arc.Create(new XYZ(10, 0, 100), new XYZ(90, 0, 100), new XYZ(50, -40, 100)));
BRepBuilderEdgeGeometry linearEdgeFront = BRepBuilderEdgeGeometry.Create(new XYZ(90, 0, 0), new XYZ(90, 0, 100));
BRepBuilderEdgeGeometry linearEdgeBack = BRepBuilderEdgeGeometry.Create(new XYZ(10, 0, 0), new XYZ(10, 0, 100));
// Add the six edges
BRepBuilderGeometryId frontEdgeBottomId = b.AddEdge(frontEdgeBottom);
BRepBuilderGeometryId frontEdgeTopId = b.AddEdge(frontEdgeTop);
BRepBuilderGeometryId linearEdgeFrontId = b.AddEdge(linearEdgeFront);
BRepBuilderGeometryId linearEdgeBackId = b.AddEdge(linearEdgeBack);
BRepBuilderGeometryId backEdgeBottomId = b.AddEdge(backEdgeBottom);
BRepBuilderGeometryId backEdgeTopId = b.AddEdge(backEdgeTop);
// Loops of the four faces
BRepBuilderGeometryId loopId_Top = b.AddLoop(topFaceId);
BRepBuilderGeometryId loopId_Bottom = b.AddLoop(bottomFaceId);
BRepBuilderGeometryId loopId_Front = b.AddLoop(frontCylFaceId);
BRepBuilderGeometryId loopId_Back = b.AddLoop(backCylFaceId);
// Add coedges for the loop of the front face
b.AddCoEdge(loopId_Front, linearEdgeBackId, false);
b.AddCoEdge(loopId_Front, frontEdgeTopId, false);
b.AddCoEdge(loopId_Front, linearEdgeFrontId, true);
b.AddCoEdge(loopId_Front, frontEdgeBottomId, true);
b.FinishLoop(loopId_Front);
b.FinishFace(frontCylFaceId);
// Add coedges for the loop of the back face
b.AddCoEdge(loopId_Back, linearEdgeBackId, true);
b.AddCoEdge(loopId_Back, backEdgeBottomId, true);
b.AddCoEdge(loopId_Back, linearEdgeFrontId, false);
b.AddCoEdge(loopId_Back, backEdgeTopId, true);
b.FinishLoop(loopId_Back);
b.FinishFace(backCylFaceId);
// Add coedges for the loop of the top face
b.AddCoEdge(loopId_Top, backEdgeTopId, false);
b.AddCoEdge(loopId_Top, frontEdgeTopId, true);
b.FinishLoop(loopId_Top);
b.FinishFace(topFaceId);
// Add coedges for the loop of the bottom face
b.AddCoEdge(loopId_Bottom, frontEdgeBottomId, false);
b.AddCoEdge(loopId_Bottom, backEdgeBottomId, false);
b.FinishLoop(loopId_Bottom);
b.FinishFace(bottomFaceId);
b.Finish();
return(b);
}
/// <summary>
/// 创建圆柱
/// </summary>
public static void CreateCylinder(Document doc, Material mat)
{
// Naming convention for faces and edges: we assume that x is to the left and pointing down, y is horizontal and pointing to the right, z is up
BRepBuilder brepBuilder = new BRepBuilder(BRepType.Solid);
// The surfaces of the four faces.
Frame basis = new Frame(new XYZ(5, -10, 0), new XYZ(0, 1, 0), new XYZ(-1, 0, 0), new XYZ(0, 0, 1));
// Note that we do not have to create two identical surfaces here. The same surface can be used for multiple faces,
// since BRepBuilderSurfaceGeometry::Create() copies the input surface.
// Thus, potentially we could have only one surface here,
// but we must create at least two faces below to account for periodicity.
CylindricalSurface frontCylSurf = CylindricalSurface.Create(basis, 5);
CylindricalSurface backCylSurf = CylindricalSurface.Create(basis, 5);
Plane top = Plane.CreateByNormalAndOrigin(new XYZ(0, 0, 1), new XYZ(0, 0, 100)); // normal points outside the cylinder
Plane bottom = Plane.CreateByNormalAndOrigin(new XYZ(0, 0, 1), new XYZ(0, 0, 0)); // normal points inside the cylinder
// Note that the alternating of "inside/outside" matches the alternating of "true/false" in the next block that defines faces.
// There must be a correspondence to ensure that all faces are correctly oriented to point out of the solid.
// Add the four faces
BRepBuilderGeometryId frontCylFaceId = brepBuilder.AddFace(BRepBuilderSurfaceGeometry.Create(frontCylSurf, null), false);
BRepBuilderGeometryId backCylFaceId = brepBuilder.AddFace(BRepBuilderSurfaceGeometry.Create(backCylSurf, null), false);
BRepBuilderGeometryId topFaceId = brepBuilder.AddFace(BRepBuilderSurfaceGeometry.Create(top, null), false);
BRepBuilderGeometryId bottomFaceId = brepBuilder.AddFace(BRepBuilderSurfaceGeometry.Create(bottom, null), true);
brepBuilder.SetFaceMaterialId(frontCylFaceId, mat.Id);
brepBuilder.SetFaceMaterialId(backCylFaceId, mat.Id);
// Geometry for the four semi-circular edges and two vertical linear edges
BRepBuilderEdgeGeometry frontEdgeBottom = BRepBuilderEdgeGeometry.Create(Arc.Create(new XYZ(0, -10, 0), new XYZ(10, -10, 0), new XYZ(5, -5, 0)));
BRepBuilderEdgeGeometry backEdgeBottom = BRepBuilderEdgeGeometry.Create(Arc.Create(new XYZ(10, -10, 0), new XYZ(0, -10, 0), new XYZ(5, -15, 0)));
BRepBuilderEdgeGeometry frontEdgeTop = BRepBuilderEdgeGeometry.Create(Arc.Create(new XYZ(0, -10, 100), new XYZ(10, -10, 100), new XYZ(5, -5, 100)));
BRepBuilderEdgeGeometry backEdgeTop = BRepBuilderEdgeGeometry.Create(Arc.Create(new XYZ(0, -10, 100), new XYZ(10, -10, 100), new XYZ(5, -15, 100)));
BRepBuilderEdgeGeometry linearEdgeFront = BRepBuilderEdgeGeometry.Create(new XYZ(10, -10, 0), new XYZ(10, -10, 100));
BRepBuilderEdgeGeometry linearEdgeBack = BRepBuilderEdgeGeometry.Create(new XYZ(0, -10, 0), new XYZ(0, -10, 100));
// Add the six edges
BRepBuilderGeometryId frontEdgeBottomId = brepBuilder.AddEdge(frontEdgeBottom);
BRepBuilderGeometryId frontEdgeTopId = brepBuilder.AddEdge(frontEdgeTop);
BRepBuilderGeometryId linearEdgeFrontId = brepBuilder.AddEdge(linearEdgeFront);
BRepBuilderGeometryId linearEdgeBackId = brepBuilder.AddEdge(linearEdgeBack);
BRepBuilderGeometryId backEdgeBottomId = brepBuilder.AddEdge(backEdgeBottom);
BRepBuilderGeometryId backEdgeTopId = brepBuilder.AddEdge(backEdgeTop);
// Loops of the four faces
BRepBuilderGeometryId loopId_Top = brepBuilder.AddLoop(topFaceId);
BRepBuilderGeometryId loopId_Bottom = brepBuilder.AddLoop(bottomFaceId);
BRepBuilderGeometryId loopId_Front = brepBuilder.AddLoop(frontCylFaceId);
BRepBuilderGeometryId loopId_Back = brepBuilder.AddLoop(backCylFaceId);
// Add coedges for the loop of the front face
brepBuilder.AddCoEdge(loopId_Front, linearEdgeBackId, false);
brepBuilder.AddCoEdge(loopId_Front, frontEdgeTopId, false);
brepBuilder.AddCoEdge(loopId_Front, linearEdgeFrontId, true);
brepBuilder.AddCoEdge(loopId_Front, frontEdgeBottomId, true);
brepBuilder.FinishLoop(loopId_Front);
brepBuilder.FinishFace(frontCylFaceId);
// Add coedges for the loop of the back face
brepBuilder.AddCoEdge(loopId_Back, linearEdgeBackId, true);
brepBuilder.AddCoEdge(loopId_Back, backEdgeBottomId, true);
brepBuilder.AddCoEdge(loopId_Back, linearEdgeFrontId, false);
brepBuilder.AddCoEdge(loopId_Back, backEdgeTopId, true);
brepBuilder.FinishLoop(loopId_Back);
brepBuilder.FinishFace(backCylFaceId);
// Add coedges for the loop of the top face
brepBuilder.AddCoEdge(loopId_Top, backEdgeTopId, false);
brepBuilder.AddCoEdge(loopId_Top, frontEdgeTopId, true);
brepBuilder.FinishLoop(loopId_Top);
brepBuilder.FinishFace(topFaceId);
// Add coedges for the loop of the bottom face
brepBuilder.AddCoEdge(loopId_Bottom, frontEdgeBottomId, false);
brepBuilder.AddCoEdge(loopId_Bottom, backEdgeBottomId, false);
brepBuilder.FinishLoop(loopId_Bottom);
brepBuilder.FinishFace(bottomFaceId);
brepBuilder.Finish();
createDirectShapeElementFromBrepBuilderObject(brepBuilder, "Full cylinder", doc);
}