2011

Clash testing can be faster, more effective, and easily repeatable if you use selection and search sets. Carefully
consider what sets of objects need clashing against each other and create Selection/Search Sets accordingly.
Geometry Type Buttons
Clash tests can include the clashing of surfaces, lines, and points of the selected items.
- clashes item surfaces. This is the default option.
- clashes items with center lines, for example pipes.
- clashes (laser) points.
The Self Intersect Check Box
Select this check box if you want to test the geometry selection in the pane against itself, in addition to testing
it against a geometry selection in the other pane.
The Select Current Button
You can also select geometry for clash testing directly in the Scene View, and in the Selection Tree dockable
window.
When you have selected the required items (press and hold CTRL to select multiple objects), click the Select
Current button under the desired pane to create the corresponding clash set.
The Shortcut Menu
Right-clicking in the Left or Right pane opens a shortcut menu:
Import Current Selection - has the same effect as pressing the Select Current button.
Select - selects the items in the Scene View.
The Run Controls
Type Selects a clash type. There are four possible types of clashes:
■ Hard - two objects actually intersect.
■ Hard (Conservative) - two objects are treated as intersecting even though the geometry triangles do not.
NOTE By default, this option is turned off. To switch it on, click the application button ➤ Options. In the
Options Editor, expand the Interface node, click Developer, and select the Show Internal Properties check box.
■ Clearance - two objects are treated as intersecting when they come within a specified distance of each other.
Selecting this clash type also detects any hard clashes.
You might use this type of clash when pipes need to have space for insulation around them, for example.
■ Duplicates - to intersect two objects must be identical both in type and position.
This type of clash testing may be used to clash the entire model against itself. This enables you to detect any
items in the scene that may have been duplicated by mistake.
Tolerance Controls the severity of the clashes reported and the ability to filter out negligible clashes, which can
be assumed to be worked around on site. Tolerance is used for Hard, Clearance and Duplicate types of clash test.
Link Enables you to link a clash test to TimeLiner schedule or an object animation scene.
Step Enables you to control the Interval Size to use when looking for clashes in a simulation sequence.
Start Runs the selected clash test.
Found Displays the number of clashes found.
Clash Detective Window | 431