How can I select all shell bodies lying on a specific plane whose face normals are oriented along Y

Question

How can I select all shell bodies lying on a specific plane whose face normals are oriented along the Y-axis?

Mohan Urs · Accepted Answer

You can use the below snippet to create a named selection of bodies in XZ plane with Y normals. Modify the script to select bodies in other planes.

target_nx = 0.0

target_ny = 1.0

target_nz = 0.0

tol = 1e-6

named_selection_name = "Bodies_With_Face_Normal_010"

body_ids = []

geo_data = ExtAPI.DataModel.GeoData

for assembly in geo_data.Assemblies:

    for part in assembly.Parts:

        for body in part.Bodies:

            for face in body.Faces:

centroid = face.Centroid

                u, v = face.ParamAtPoint((centroid[0], centroid[1], centroid[2]))

                normal = face.NormalAtParam(u, v)

if abs(normal[0] - target_nx) <= tol and \

                   abs(normal[1] - target_ny) <= tol and \

                   abs(normal[2] - target_nz) <= tol:

if body.Id not in body_ids:

                        body_ids.append(body.Id)

break

if len(body_ids) > 0:

selection = ExtAPI.SelectionManager.CreateSelectionInfo(SelectionTypeEnum.GeometryEntities)

    selection.Ids = body_ids

ns = ExtAPI.DataModel.Project.Model.AddNamedSelection()

    ns.Name = named_selection_name

    ns.Location = selection

ExtAPI.SelectionManager.NewSelection(selection)

print "Named Selection created:", named_selection_name

    print "Number of bodies added:", len(body_ids)