Check for Watertightness Tools
There are three types of Check for Watertightness Tools:
- Check for Watertightness (All)
- Check for Watertightness (Active)
- Check for Watertightness (Selected)
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All of these tools perform the same task. They search the geometry looking for a non-Watertight Edge, stopping the moment they find one. If they do find a non-Watertight Edge, they hide the entire model except for that Edge and any connected Faces, then zoom in on that geometry. They will also pop up a dialog message informing you of the exact nature of the problem, similar to that shown in the following figure.
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They do not continue to search for other non-watertight Edges after one has already been found. If all the geometry that they check is watertight, they will inform you with a dialog box as shown in the following example:
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The difference in the three types lies only in what geometry they check. Check for Watertightness (All) checks the entire model. Check for Watertightness (Active) checks the Group (including all its sub-Groups) that you are currently editing; if you are not editing any Group, it checks the whole model (in this case, it behaves exactly like Check for Watertightness (All)). Check for Watertightness (Selected) validates only geometry that has been selected.
Check for Watertightness (All) and Check for Watertightness (Active) check both visible and invisible geometries. Since it is often difficult to select invisible geometry (this is particularly true if the "View Hidden Geometry" preference is turned off in the SketchUp menu bar), it is recommended that care should be taken when interpreting the results of a Check for Watertightness (Selected) operation, especially if it reports that all geometry is watertight.