// ===============================================================
// helper function: given a solid, find a planar
//Extrusion实体,给一个实体,给一个方向,找到与此方向一致的面。
// face with the given normal (version 2)
// this is a slightly enhaced version of the previous
// version and checks if the face is on the given reference plane.
// ===============================================================
PlanarFace findFace(Application app, Extrusion pBox, XYZ normal, ReferencePlane refPlane)
{
// get the geometry object of the given element
//
Options op = new Options();
op.ComputeReferences = true;
GeometryObjectArray geomObjs = pBox.get_Geometry(op).Objects;
// loop through the array and find a face with the given normal
//
foreach (GeometryObject geomObj in geomObjs)
{
if (geomObj is Solid) // solid is what we are interested in.
{
Solid pSolid = geomObj as Solid;
FaceArray faces = pSolid.Faces;
foreach (Face pFace in faces)
{
PlanarFace pPlanarFace = (PlanarFace)pFace;
// check to see if they have same normal
//face.Normal是面的向量。IsAlmostEqualTo();
if ((pPlanarFace != null) && pPlanarFace.Normal.IsAlmostEqualTo(normal))
{
// additionally, we want to check if the face is on the reference plane
//还要判断面是否在参考平面上。
XYZ p0 = refPlane.BubbleEnd;//终点?
XYZ p1 = refPlane.FreeEnd;//起点?
Line pCurve = app.Create.NewLineBound(p0, p1);
if (pPlanarFace.Intersect(pCurve) == SetComparisonResult.Subset)//子集
{
return pPlanarFace; // we found the face
}
}
}
}
// will come back later as needed.
//
//else if (geomObj is Instance)
//{
//}
//else if (geomObj is Curve)
//{
//}
//else if (geomObj is Mesh)
//{
//}
}
// if we come here, we did not find any.
return null;
}
// helper function: given a solid, find a planar
//Extrusion实体,给一个实体,给一个方向,找到与此方向一致的面。
// face with the given normal (version 2)
// this is a slightly enhaced version of the previous
// version and checks if the face is on the given reference plane.
// ===============================================================
PlanarFace findFace(Application app, Extrusion pBox, XYZ normal, ReferencePlane refPlane)
{
// get the geometry object of the given element
//
Options op = new Options();
op.ComputeReferences = true;
GeometryObjectArray geomObjs = pBox.get_Geometry(op).Objects;
// loop through the array and find a face with the given normal
//
foreach (GeometryObject geomObj in geomObjs)
{
if (geomObj is Solid) // solid is what we are interested in.
{
Solid pSolid = geomObj as Solid;
FaceArray faces = pSolid.Faces;
foreach (Face pFace in faces)
{
PlanarFace pPlanarFace = (PlanarFace)pFace;
// check to see if they have same normal
//face.Normal是面的向量。IsAlmostEqualTo();
if ((pPlanarFace != null) && pPlanarFace.Normal.IsAlmostEqualTo(normal))
{
// additionally, we want to check if the face is on the reference plane
//还要判断面是否在参考平面上。
XYZ p0 = refPlane.BubbleEnd;//终点?
XYZ p1 = refPlane.FreeEnd;//起点?
Line pCurve = app.Create.NewLineBound(p0, p1);
if (pPlanarFace.Intersect(pCurve) == SetComparisonResult.Subset)//子集
{
return pPlanarFace; // we found the face
}
}
}
}
// will come back later as needed.
//
//else if (geomObj is Instance)
//{
//}
//else if (geomObj is Curve)
//{
//}
//else if (geomObj is Mesh)
//{
//}
}
// if we come here, we did not find any.
return null;
}