Transform Symmetry

The Transform feature is a type of feature modifier. This capability modifies a set of functional features of the active body by applying a transformation to them individually. The affected features retain their full functional behavior.

  • The command allows you to define four types of transformations:
    • Translation - Translates one or more features.
    • Rotation - Rotates one or more features about an axis.
    • Scaling - Resizes one or more features based on a ratio factor.
    • Symmetry - Applies a Symmetry transformation by reflection.
    • Affinity - Transforms the absolute size by multiplying a scale ratio.
    • Axis to Axis - Transposes the geometry from one reference axis system to another.

    A Symmetry transformation causes the selected functional features to be reflected through reference geometry. The reference geometry can be either planar, linear, or point in space. If the reference geometry is a plane, the symmetry operation is a reflection (mirror) through the plane. If the reference geometry is a line, the symmetry operation is a 2-fold rotation (i.e. 180 degree rotation) about the line as the axis. If the reference geometry is a point, the symmetry operation is an inversion through the point.

This scenario illustrates a Symmetry Transform applied to a functional feature (pocket).


Open the Transform.CATPart document.



  1. Click the Transform icon . The Transform dialog box is displayed.

    Set Transform type:  Symmetry


  2. Select Features to transform:  Pocket.1

  3. Set Reference: zx plane

  4. Click OK.