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quick and useful method of setting up items across sessions (see the chapter called "Selecting

Items" in the Roamer book for more details).

2. 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.

3. 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.

4. 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

Setting the clash test type and tolerance 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.

• Hard (Conservative). This option performs the same clash test as Hard, however it additionally

applies a conservative intersection method. See Intersection Method for more information on this.

Note

This clash test type is only available when in Developer profile. See the Interface, Profiles

section of the Roamer book for more information on user profiles.

• Clearance. Choose this option if you wish the clash test to detect for geometry within a set distance

from other geometry (see Clash Tolerance for information on how to set this distance). You might use

this type of clash when pipes need to have space for insulation around them, for example.

Note

Clearance clashes are not the same as "soft" clashes. Clearance clashes detect for static

geometry coming within a distance of other geometry, whereas soft clashes detect potential

clashes between moving components. JetStream Clash Detective does not currently support soft

clash checking.

• Duplicates. Choose this option if you wish the clash test to detect for duplicate geometry. You might

use this type of clash test to check a model against itself to ensure the same part has not been drawn,

Selecting Items for Clash Testing

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