struct.node.surface.xdir
Syntax
- b = struct.node.surface.xdir(sn,v)
Set the orientation of the surface system of node sn such that the x-direction is aligned with the projection of the surface vector v onto the normal plane, which is defined by the z-direction. This operation can only be performed upon nodes that have a valid surface system (to ensure that the z-direction always corresponds with the average normal direction of at least one of the shell-type SELs using the node). A return value of true indicates success and false indicates failure.
Returns: b - boolean flag: true indicates success, and false indicates failure
Arguments: sn - structure node pointer
v - vector
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