Snapping Mode Behavior in Edit Commands

Shape Snapping

For edit commands, if a shape is on a snapping layer-purpose pair (LPP) with the singleTrackCenter snapping mode, depending on the grid directions, snapping is performed only if the height or width of the shape is equal to twice the enclosure value. For other cases, snapping is disabled.

For shapes on a snapping LPP with the singleTrackCenter snapping mode, the value specified in the checkAllSPGridsEnclosures environment variable is ignored and the shape dimensions are verified in all cases.

Instance Snapping

LPPs with the singleTrackCenter snapping mode in the instance master have a higher precedence than multiTrackCenter LPPs.

• If there is a shape on the singleTrackCenter LPP in the master, then the shapes on multiTrackCenter LPPs are not snapped.
• The multiTrackCenter LPPs are snapped only when there are no shapes on any of the singleTrackCenter LPPs.
• Snapping is not performed in a direction if shapes exist on the singleTrackCenter LPP, but no shape meets the dimension rule.
• On singleTrackCenter LPPs, individual shapes inside the master are snapped instead of the combined bounding box used for multiTrackCenter LPPs.
• A shape on singleTrackCenter LPP is snapped only if the dimension rule of twice the grid enclosure is met. In case of multiple singleTrackCenter LPPs, all the singleTrackCenter LPPs are examined until a shape meeting the dimension rule is found. If all the shapes on the singleTrackCenter LPP violate the dimension rule, snapping is not performed in that direction.

Related Topics

Object Snapping in singleTrackCenter Snapping Mode

Object Editing in Layout XL

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