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Hi mikegustus8493,
Geometry in Navisworks is made up of triangles. The distance reported for a hard clash test is the distance needed to move an object so that the intersecting triangles no longer intersect.
As an example, here is a screenshot of a line intersecting a 6 sided object with the render style set to hidden line. Notice that each side of the object is made up of two triangles.
Taking a point to point measure from where the line hits the surface to the nearest edge of the object, it is about .24m. However, the distance reported in the clash result is .06m. Taking a point to point measurement from the point where the line hits the surface to the nearest edge of the triangle it intersects, it is about .06m, which explains the distance value in the clash result.
Please try the following
1. Click the Application Button > Options.
2. Under Interface > Developer, mark “Show internal properties.”
This will allow you to select an additional test type: Hard (Conservative). Also, some additional properties will be listed in the properties window.
As described in the glossary of the Help Topics within Navisworks, with a "Hard (Conservative)" clash test, “the greatest penetration of space around one item into the space around another is measured.” With a "Hard" clash test, “the greatest penetration between a pair of triangles is measured.”
If you try running a test as Hard (Conservative), are the distances reported accurately? In my example using a line and a six sided object, when set to Hard (Conservative), the distance then showed as .24m in the clash result.
Please also note, that using the Hard (Conservative) clash test type can give false positive results as described in the help topics.
Please let me know if this helps.
Best regards,
John Lipp
Product Support Specialist
Autodesk Product Support
Geometry in Navisworks is made up of triangles. The distance reported for a hard clash test is the distance needed to move an object so that the intersecting triangles no longer intersect.
As an example, here is a screenshot of a line intersecting a 6 sided object with the render style set to hidden line. Notice that each side of the object is made up of two triangles.
Taking a point to point measure from where the line hits the surface to the nearest edge of the object, it is about .24m. However, the distance reported in the clash result is .06m. Taking a point to point measurement from the point where the line hits the surface to the nearest edge of the triangle it intersects, it is about .06m, which explains the distance value in the clash result.
Please try the following
1. Click the Application Button > Options.
2. Under Interface > Developer, mark “Show internal properties.”
This will allow you to select an additional test type: Hard (Conservative). Also, some additional properties will be listed in the properties window.
As described in the glossary of the Help Topics within Navisworks, with a "Hard (Conservative)" clash test, “the greatest penetration of space around one item into the space around another is measured.” With a "Hard" clash test, “the greatest penetration between a pair of triangles is measured.”
If you try running a test as Hard (Conservative), are the distances reported accurately? In my example using a line and a six sided object, when set to Hard (Conservative), the distance then showed as .24m in the clash result.
Please also note, that using the Hard (Conservative) clash test type can give false positive results as described in the help topics.
Please let me know if this helps.
Best regards,
John Lipp
Product Support Specialist
Autodesk Product Support
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