To Select Items for a Clash Test

To select items for a clash test

1. If the Clash Detective window is not already open, click Home tab Tools panel Clash Detective.
2. Click the Tests panel expand button, and select the test you want to configure.
3. Click the Select tab.

   There are two identical panes in this tab called Selection A and Selection B. These panes contain tree views of two sets of items that will be tested against each other during the clash test, and you need to select items in each. You can select the items by choosing an option from the drop-down list for each selection tree and manually selecting items from the tree hierarchies. Any selection sets in the scene are also available from the drop-down list, which is a quick and useful method of setting up items across sessions (see Interactive Geometry Selection).

   You can also transfer the current selection to one of the selection panes by selecting items in the usual way in the Scene View or Selection Tree and clicking the appropriate Use Current Selection button .

4. Optional: Select the appropriate Self Intersect button to test the corresponding set for self-intersection, as well as intersection against the other set.
5. Optional: You can include the clashing of points, lines, or surfaces in your test. Underneath each window there are three buttons that correspond to surfaces, lines and points. To toggle a button, click it.

   So, for example, if you want to run a clash test between some surface geometry and a point cloud, you can set up the geometry in the Selection A pane, and click the Point Cloud button under the Selection B pane. The Surface button under the Selection A pane is toggled on by default. Additionally, you could set the clash Type to Clearance with a Tolerance of 1 meter.

   Note: If the Type is set to Hard, lines and surfaces will actually need to intersect with any points to register a clash.