Chain controls

SURFCAM has Chaining filters that can help users select geometry more easily. When choosing Chaining Options before selecting geometry, users can control two properties of the chain. A chain could be constrained to only identify only further geometry that is planar with previously selected geometry to filter out plane direction changes. Alternatively or jointly an option to identify only further geometry that is only "tangent" to the end of the previously selected element can be used to filter out corners. Each of these options can be used to make selection on complex geometry sets much easier. Users will not be required in some circumstances to "follow the chain" to select the next item in the path.