View source for LlVolumeDetect

{{Issues/SVC-2996}}{{LSL_Function/boolean|detect}}
{{LSL_Function
|func_id=248|func_sleep=0.0|func_energy=10.0
|func=llVolumeDetect|p1_type=integer|p1_name=detect
|func_footnote
|func_desc=If '''detect''' is [[TRUE]], VolumeDetect is enabled, physical object and avatars can pass through the object. This works much like Phantom, but unlike Phantom, VolumeDetect objects trigger [[collision_start]] and [[collision_end]] events when interpenetrating. Collision events will trigger
in any script in the object.
|return_text
|spec
|caveats=
*VolumeDetect objects will fall through the ground, whereas Phantom objects will not.
*VolumeDetect cannot be enabled on attachments{{Footnote|Attachments aren't included in the avatar bounding box, so it's moot}}.
*Only detects physical objects and avatars.
*Can only be applied to the root prim (which will make the entire object VolumeDetect).
*When moving via [[llSetPos]]() by a loop of stages, collision events will not trigger.
*Attachments will not register collision events when the avatar collides with a VolumeDetect object.
|constants
|examples=<lsl>default
{
    state_entry()
    {
        llVolumeDetect(TRUE); // Starts llVolumeDetect
    }
    collision_start(integer total_number)
    {
        llSay(0, "Detected!"); // Tells you when something penetrates the prim
    }
}</lsl>
|helpers
|also_functions=
{{LSL DefineRow||[[llPassCollisions]]|}}
|also_events=
{{LSL DefineRow||[[collision_start]]|}}
{{LSL DefineRow||[[collision]]|}}
{{LSL DefineRow||[[collision_end]]|}}
|also_tests
|also_articles
|notes
|sort=VolumeDetect
|cat1=Collision
|cat2=Physics
|cat3=Object
|cat4=Phantom
}}