Clash Detective Terminology
clash status
Each clash has a current status associated with it and each status has a colored icon to identify them.
This status is updated automatically by Clash Detective or can be manually overridden if desired. The statuses
are as follows:
New- a clash found for the first time in the current run of the test.
Active- a clash found in a previous run of the test and not resolved.
Reviewed
- a clash previously found and marked by somebody as reviewed.
Approved- a clash previously found and approved by someone.
Resolved- a clash found in a previous run of the test and not in the current run of the test. It is therefore
assumed to be resolved.
Old- any clash in an "old" test. The icons still have the code of the status from the previous run, but this is a
reminder to say that the current test is old. See
for a description of old tests.
If the status is changed to Approved, Clash Detective takes the user currently logged on as the person who
approved it.
Enabling hyperlinks will show clash results using the relevant status icon
.
clash test status
A clash test can have one of 4 statuses:
New indicates a clash test that has not yet been run with the current model.
Done indicates a clash test that has been successfully run with the latest version of the model.
Old indicates a clash test that has been altered in some way since being set up. This might include changing an
option, or having loaded the latest revision of the model.
Partial indicates a clash test that has been interrupted during execution. Results are available up to the point of
interruption.
clearance clash
A clash in which the geometry of item 1 may or may not intersect that of item 2, but comes
within a distance of less than the set
duplicate clash
A clash in which the geometry of item 1 is the same as that of item 2, located within a distance
of between zero and the set
. A tolerance of zero would therefore only detect duplicate geometry in
exactly the same location.
hard clash
A clash in which the geometry of item 1 intersects that of item 2 by a distance of more than the set
.
intersection method
A standard Hard clash test type applies a Normal Intersection Method, which sets the clash
test to check for intersections between any of the triangles defining the two items being tested (remember all
Autodesk Navisworks geometry is composed of triangles). This may miss clashes between items where none of
the triangles intersect. For example, two pipes that are exactly parallel and overlap each other slightly at their
ends. The pipes intersect, yet none of the triangles that define their geometry do and so this clash would be
missed using the standard Hard clash test type. However, choosing Hard (Conservative) reports all pairs of items,
which might clash. This may give false positives in the results, but it is a more thorough and safer clash detection
method.
severity
For hard clashes, the severity of a clash depends on the intersection of the two items intersecting. Hard
clashes are recorded as a negative distance. The more negative the distance, the more severe the clash. Hard clash
severity depends on whether the Conservative or NormalIntersection Method has been applied (see
for more details on this). If Normal, the greatest penetration between a pair of triangles is measured. If
Conservative, the greatest penetration of space around one item into the space around another is measured.
For clearance clashes, the severity depends on how close one item invades the distance required around the
second. For example, an item coming within 3mm is more severe than an item coming within 5mm of the other.
For duplicate clashes, the severity depends on how close one item is to the other. When the distance between
them is zero, it is more likely that this is duplicate geometry, where as items that are further apart are more likely
to be different objects and therefore have a lesser severity.
tolerance
The 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
,
types of clash test. Any clash found that is within this tolerance will be reported, whereas
452 | Glossary
Содержание 507B1-90A211-1301 - NavisWorks Manage 2010
Страница 1: ...Autodesk Navisworks Manage 2010 User Guide March 2009 ...
Страница 12: ...xii Contents ...
Страница 14: ...2 Part 1 Welcome to Autodesk Navisworks Manage 2010 ...
Страница 64: ...52 Chapter 3 Installation ...
Страница 97: ...Get a Whole Project View 85 ...
Страница 98: ...86 Part 2 Get a Whole Project View ...
Страница 136: ...124 Chapter 5 Work with Files ...
Страница 178: ...To toggle ViewCube Click View Head Up Display ViewCube 166 Chapter 6 Explore Your Model ...
Страница 262: ...250 Chapter 9 Use Viewpoints and Sectioning Modes ...
Страница 270: ...258 Chapter 11 Work Within a Team ...
Страница 282: ...270 Chapter 12 Share Data ...
Страница 346: ...334 Chapter 14 Create Photorealistic Visualizations ...
Страница 460: ...448 Chapter 17 Autodesk Navisworks Reference ...
Страница 466: ...454 Glossary ...