Anyway to Check Collisions on a Phantom Child Prim?

[Syle Devin]

I'm at a loss of what to do. llVolumeDetect doesn't work on child prims and llCollisionFilter doesn't detect collisions with phantom prims. Anything I can do to make it work? Is there a way to check collision only with the child prim using llVolumeDetect? I know it says llVolumeDetect will cause the whole object to detect but is there anyway at all to control which prim detects the collision?

[Rolig Loon]

Have you tried asking llDetectedLinkNumber(0) ?

[Syle Devin]

Hmm, no I had not thought to try that. Thanks, I am testing with it now and will see what happens. 

 

I'm assuming I can just use if (llDetectedLinkNumber(0) == "Link Number Here") to check if a certain linked prim was hit?

 

[Rolig Loon]

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Syle Devin wrote:

Hmm, no I had not thought to try that. Thanks, I am testing with it now and will see what happens. 

 

I'm assuming I can just use

if (llDetectedLinkNumber(0) == "Link Number Here")

to check if a certain linked prim was hit?

 

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Yup.  Should work, assuming it's in a collision*, touch*, or sensor* event.

[Innula Zenovka]

I don't think llDetectedLinkNumber works with llVolumeDetect.  

The Wiki contains a caveat "llDetectedLinkNumber will return 0 in collision_start and collision_end events of VolumeDetect objects (SVC-2996), which is certainly my experience.

 

[Rolig Loon]

Drat.  You're right.  It works in a touch_start event but not in collision_start.  :smileysad:

[Syle Devin]

I actually tried it with a regular llCollissionFilter in the root prim. I don't know if the script worked because I wasn't able to set my child prims phantom. So the rest of the script never ran. I used the script that someone put on the wiki but it didn't work. 

It's supposed to be a a multiplier for a skeeball game. The ball goes through the multiplier before hitting the prim that sets the score. That is why it has to be phantom. Although as of now I'm trying another way that does not involve collision with the child prims.  

 

[Xiija]

http://wiki.secondlife.com/wiki/LlCastRay

 

[Rolig Loon]

Of course, the other possible solution is to forget having your detection prim be a child.  Either make it the root prim or take it out of the linkset altogether and let it communicate with llRegionSayTo instead of llMessageLinked.