Export Mesh in Local Coordinate System

Hello

In mechanical scripting, is there a simple method to get mesh coordinates in a local coordinate system (cartesian).
Do I have to program the transformation myself or can I use some already programmed methods ?
I found something with 4x4 matrix, but I'm too old for that ...

Thanks

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Comments

Georges Vacher

Oups sorry

It was quite easy to do with csys.matrix...
Just surprised there is no method to do this natively

bye

Mike.Thompson

FYI you can use some DPF operators to rotate data to a given CS (matrix).

import mech_dpf
import Ans.DataProcessing as dpf

def RotationMatrixFieldFromCS(CsName):
"""

"""
CS = ExtAPI.DataModel.GetObjectsByName(CsName)[0]
CsMatrix = list(CS.Matrix)
TransformMatrix = [CsMatrix[i] for i in [0,3,6,1,4,7,2,5,8]]
rot_mat_f = dpf.FieldsFactory.CreateScalarField(1)
rot_mat_f.Data = TransformMatrix
return rot_mat_f

def RotationOperatorFromCs(CsName, FieldsContainer):
"""
"""
rot_mat_f=RotationMatrixFieldFromCS(CsName)
RotateOp = dpf.operators.geo.rotate_fc() # operator instantiation
RotateOp.inputs.fields_container.Connect(FieldsContainer)
RotateOp.inputs.coordinate_system.Connect(rot_mat_f)
return RotateOp

def AlignFieldToCs(CsName, FieldsContainer):
"""
Take a field and align it to a local CS in Mechanical by its Name
"""
RotateOp=RotationOperatorFromCs(CsName, FieldsContainer)
RotField=RotateOp.outputs.fields_container.GetData()
return RotField

def ObjByName(Name):
return ExtAPI.DataModel.GetObjectsByName(Name)[0]

Georges Vacher

Thanks Mike for this method.
I'm not familiar with DPF, but I'll try to learn how to use it.