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llVolumeDetect
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**##llVolumeDetect([[integer]] detect)##** When ##**detect = TRUE##**, this makes the entire [[link link set]] the script is attached to [[phantom]]. But, if another [[object]] [[penetrate interpenetrates]] it, it will get a ##[[collision_start]]## [[event]]. When an object stops interpenetrating, a ##[[collision_end]]## event is generated. While the other is interpenetrating, ##[[collision]]## events are NOT generated. The script must be applied to the [[root]] object of the link set to get the [[collisions collision]] events. Collision filters work normally (see ##[[llCollisionFilter]]##). The object can NOT be set to phantom by any other means, or else ##llVolumeDetect## will not work. ##llVolumeDetect## will set phantom automatically. Example: %%(lsl)llVolumeDetect(TRUE); // turns llVolumeDetect on.%% A script that uses ##llVolumeDetect## will say "##Attachments cannot use llVolumeDetect.##" if the object containing the script is [[attachment attached]] at the time ##llVolumeDetect## is [[call called]]. If ##llVolumeDetect## is used in an attachment, the ##[[collision]]## events will still be triggered. When enabled ##llVolumeDetect## will remain in effect as long as there is a script on the object. It will be automatically removed when the last script is deleted, however the [[phantom]] state will persist. **Note:** As of [[SL]] [[revisions 1.6.7]], ##llVolumeDetect## //should not// be used on [[physical]] objects! Doing so will cause the object to fall through the [[land ground]] and go off-[[world]]. Presumably, this is because ##llVolumeDetect## does not use the same mechanism as a regular phantom object and that the [[Lindens]] goofed up. The Lindens have been notified of this issue, but it has not yet been fixed. If you need the object to be physical, you can use ##[[llSetBuoyancy]](1.0)## to fix the falling problem. **Note:** "##llVolumeDetect## does not appear to trigger collision_start events on passive objects, only physical objects, this could be a bug in the new SL version, but I could be mistaken." -Kyle Hayashi **Note:** As of SL [[revisions 1.6.7]], ##[[llDetectedLinkNumber]]## will only ever return ##0## when used with ##[[llVolumeDetect]]##, even when used in a multi-prim object. This may be caused by the fact that ##llVolumeDetect## was added some time after the original [[detected]] functions. There is not yet any word on when this might be fixed. **Note:** ##[[land_collision_start]]##, ##[[land_collision_end]]## and ##[[land_collision]]## events aren't generated anymore after setting ##[[llVolumeDetect]]## to ##[[TRUE]]##. ---- [[Functions]] | [[Detected]] | [[Collisions]] | [[Phantom]]
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