2009

Chapter 51. Selecting Items for Testing
In this section you will learn how to set up various parameters for your tests.
Selecting Items for a Clash Test
To select items:
1. If the Clash Detective window is not already open, select Tools > Clash Detective from the menu
bar.
2. Click the Batch tab, and select the test you want to configure.
3. Click the Select tab.
There are two identical boxes in this tab called Left and Right. These boxes represent 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 a tab from the selection tree and manually selecting
items from the tree hierarchies. Any selection sets in the scene are also included on a tab, which is a
quick and useful method of setting up items across sessions (see "Selecting Items" in the Basic
NavisWorks Functionality section for more details).
You can also transfer the current selection to one of the boxes by selecting items in the usual way in
the main navigation window and/or selection tree and clicking the appropriate Select Current button.
4. Check the appropriate Self Intersect check box if you want that set to test for self-intersection, as
well as intersection against the other set.
5. Clash tests can also include the clashing of points, lines and surfaces depending on which of the
three buttons underneath each window are selected. These three buttons correspond to surfaces,
lines and points, and each can be toggled on and off by clicking on them.
If it was required to do a clash test, for example, between some surface geometry and a point cloud,
then it might be done by setting up the geometry in the left hand window, and the point cloud in the
right. At that point the Surface button would be set under the left window, with the other two unset.
The Points button would be set under the right-hand window with the other two unset, and the Type
perhaps set 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.
Selecting Clash Test Options
There are four default clash test types for you to choose from:
• Hard. Choose this option if you wish the clash test to detect actual intersections between geometry.
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