mesh.Mesh.offset#

Mesh.offset(distance=1.0)#

Offset a surface mesh along its averaged nodal normals.

This method moves each node of the mesh along an averaged normal direction by a given distance. The nodal normal is computed as the average of the normals of all elements sharing that node.

Supported element types are:

tri3: normals are computed directly.
quad4: the mesh is internally converted to tri3 for normal computation.

Parameters#

distancefloat, optional: Distance over which the points should be moved. Positive values offset the mesh in the direction of the averaged normals. Default is 1.0.

Returns#

Mesh: A Mesh of the same element type as the input mesh, obtained by moving each node along its averaged normal vector by the specified distance.

See Also#

offset_implicit()

Examples#

>>> M_quad = Mesh(eltype='quad4')
>>> M_tri = M_quad.convert('tri3')
>>> M_tri2 = M_tri.offset(distance=1.0)
>>> print(M_tri2.coords)
[[0. 0. 1.]
 [1. 0. 1.]
 [1. 1. 1.]
 [0. 1. 1.]]

>>> M_quad2 = M_quad.offset(distance=-0.5)
>>> print(M_quad2.coords)
[[ 0.   0.  -0.5]
 [ 1.   0.  -0.5]
 [ 1.   1.  -0.5]
 [ 0.   1.  -0.5]]