Creating Reflect Lines

This task shows you how to create reflect lines, whether closed or open. Reflect lines are curves for which the normal to the surface in each point present the same angle with a specified direction.
Open the ReflectLine1.CATPart document.
Display the Project-Combine sub-toolbar by clicking and holding the arrow from the Projection icon.

  1. Click Reflect Lines .

    The Reflect Line Definition dialog box appears.
  2. Choose whether you want to create cylindrical lines (by default) or conical lines.

    • Cylindrical lines correspond to reflect curves with a light source at infinite.
    • Conical lines correspond to reflect curves with a point light source at finite.
  3. Select the support surface.

  4. Select an axis for the Direction (cylindrical type) or a point for the Origin (conical type).

  5. Key in an angle, representing the value between the selected direction and the normal to the surface.
    Here we keyed in 120°.

    Cylindrical reflect line Conical reflect line
    You can also use the displayed manipulators to modify the angle value (green manipulators), to reverse the support (red arrow) or to reverse the direction (red arrow, only available for the cylindrical type). 
  6. Select the Angle Reference, that is whether the angle should be computed:

    • Normal (by default) between the normal to the support and the direction.
      It is set by default to 90deg.
    • Tangent to the plane tangent to the support and the direction.
      It is set by default to 0deg.
  7. Click OK to create the element.

    The Reflect Line (identified as ReflectLine.xxx) is added to the specification tree.
     
      Cylindrical reflect line

    Conical reflect line

     
    Click Repeat object after OK to create several reflect lines, each separated from the initial line by a multiple of the Angle value.
    Simply indicate in the Object Repetition dialog box the number of instances that should be created and click OK.
    Do not use a null angle value (for the Normal Angle Reference) or an angle value equal to 90deg (for the Tangent Angle Reference) on a closed surface.
    Parameters can be edited in the 3D geometry. To have further information, refer to the Editing Parameters.