Navisworks Clash default rules not complete?

[coopert]

Looking through the NW 2014 help for default clash rules, I find this excerpt...

• Items in Same Layer - any items found clashing that are in the same layer are not reported in the results. This is useful if, for example, you want to ignore clashes on the same level from a Revit 2014 file. Layer or levels are denoted by the icon in the Selection Tree.
• Items in Same Group/Block/Cell - any items found clashing that are in the same group (or inserted block), such as a block definition from AutoCAD or a cell definition from MicroStation, are not reported in the results. Groups, blocks and cells are denoted by the icon in the Selection Tree.
• Items in Same File - any items found clashing that are in the same file (either externally referenced or appended) are not reported in the results. If you model contains multiple CAD files, this option enables you to only search for clashes between different files.
• Items in Same Composite Object - any items found clashing that are part of the same composite object ( a single CAD object represented by a group of geometry items) are not reported in the results. A composite object () is a group of geometry that is considered a single object in the Selection Tree. For example, a window object might be composed of a frame and a pane, or a cavity wall may be made of several layers. This rule ensures that self-intersections in a CAD object are ignored. In this case the window pane and the frame may be modeled so that the parts touch or overlap. This rule would ignore clashes between them.
• Items in Previously Found Pair of Composite Objects - any items found clashing that are part of composite objects that have previously been reported in the test are not reported in the results. For example, when a clash is found between the same pair of composite objects, they will be treated as a single clash, so only once clash is reported. The other is ignored. Whereas 'Ignore Items in same composite object' will ignore clashes between parts of a single object, this will ignore multiple clashes between different composite objects. This is useful for reducing the number of false positives. An example of this would be of a pipe going through a wall. With this option selected the clash would just be counted once, instead of counting the clashes on either side of the wall as separate clashes.
• Items with Coincident Snap Points - any items found clashing that have snap points that coincide are not reported in the results, for example pipe runs and fittings that have snap points at the end of center lines. Autodesk Navisworks draws a cylinder as a series of triangles to improve performance (try Hidden Line mode to see how they are drawn). Depending on the faceting factor of the cylinder, some of the triangles may clash with each other, even if the pipe or fittings would fit if this was drawn as completely round.

In my 2014 NW default clash rule is this......

• Items in Same Layer
• Items in Same Group/Block/Cell
• Items in Same File
• Items with Coincident Snap Point

Why would I be missing two of the default clash rules?

Thanks,

Tim

[Lance.Coffey · Accepted solution]

It looks like when you were looking in the Navisworks Rules Tab help topic, it had not been updated to show changes in functionality in the 2014 version. If you look at the help topic now, you should see that it matches what you find in Navisworks.

There is a new checkbox for Composite Object Clashing on the Select Tab within the Clash Detective.

[brett.cooperLHW2F]

I check and uncheck that box and I can't find that it does anything at all. I still get multiple clashes for each block/cell.