Second Life Forums Archive - llDetectedPos() across a sim border

Jamie Marlin

Ought to be working....

Join date: 13 May 2005

Posts: 43

06-28-2005 09:30

Hi all!

Anybody know the whole story on how this function works across sim borders? I am working on a pet script which uses llDetectedPos() in a sensor event and llMoveTo() to move a physical pet. In follow mode, I loose the pet as soon as I cross a sim border - and pick it up again as soon as I return. Ok... makes sense. Maybe llDetectedPos() doesn't work across the border. But... I have seen several example scanner scripts where it DOES work - or at least llVecDist() returns the proper distance. To add to my confusion, when I put the pet in orbit mode and stand near the border, it can circle into the next sim and then back out successfully.

What is going on? Any ideas?

Jon Marlin

Builder, Coder, RL & SL

Join date: 10 Mar 2005

Posts: 297

06-28-2005 09:43

You can give slightly out-of-bounds values when you move a non-physical object using llSetPos, which will put the object into the adjacent sim. If the sim border is at 0, you can set the value to -5 and the object will move 5 meters into that sim.

I suspect llDetectedPos has the same type of behavior. The teleport home script call has the same problem as far as I know -- if you own land on a sim border, it can teleport someone home who is in the next sim if they are close to the border (I've actually had this happen to me).

- Jon

_____________________

Come visit Marlin Engineering at Horseshoe (222, 26) to see my line of flying vehicles.

Jillian Callahan

Rotary-winged Neko Girl

Join date: 24 Jun 2004

Posts: 3,766

06-28-2005 09:54

llSensor does not seem to work across a sim border. However, llSensorRepeat *does*, on the third or fourth iteration.

_____________________

Strife Onizuka

Moonchild

Join date: 3 Mar 2004

Posts: 5,887

06-28-2005 09:56

Sensors I beleive have a 10 meter buffer into adjacent sims.

_____________________

Truth is a river that is always splitting up into arms that reunite. Islanded between the arms, the inhabitants argue for a lifetime as to which is the main river.
- Cyril Connolly

Without the political will to find common ground, the continual friction of tactic and counter tactic, only creates suspicion and hatred and vengeance, and perpetuates the cycle of violence.
- James Nachtwey

Christopher Omega

Oxymoron

Join date: 28 Mar 2003

Posts: 1,828

06-28-2005 10:42

Sensors are very finiky about working across sim borders. Sometimes they do, sometimes they dont. I wouldn't rely on them for a flying pet.

Instead, I would wear an attachment that chats my position (llGetPos() *and* llGetRegionCorner()) and my rotation. Then, the pet can listen for the data, parse it, and move to the offset it needs to move to. Chat crosses sim borders quite reliably.

See the wiki page on global coordinates to get an idea of why I said use both llGetPos and llGetRegionCorner.
==Chris

_____________________

October 3rd is the Day Against DRM (Digital Restrictions Management), learn more at http://www.defectivebydesign.org/what_is_drm

llDetectedPos() across a sim border
Jamie Marlin Ought to be working.... Join date: 13 May 2005 Posts: 43	06-28-2005 09:30 Hi all! Anybody know the whole story on how this function works across sim borders? I am working on a pet script which uses llDetectedPos() in a sensor event and llMoveTo() to move a physical pet. In follow mode, I loose the pet as soon as I cross a sim border - and pick it up again as soon as I return. Ok... makes sense. Maybe llDetectedPos() doesn't work across the border. But... I have seen several example scanner scripts where it DOES work - or at least llVecDist() returns the proper distance. To add to my confusion, when I put the pet in orbit mode and stand near the border, it can circle into the next sim and then back out successfully. What is going on? Any ideas?
Jon Marlin Builder, Coder, RL & SL Join date: 10 Mar 2005 Posts: 297	06-28-2005 09:43 You can give slightly out-of-bounds values when you move a non-physical object using llSetPos, which will put the object into the adjacent sim. If the sim border is at 0, you can set the value to -5 and the object will move 5 meters into that sim. I suspect llDetectedPos has the same type of behavior. The teleport home script call has the same problem as far as I know -- if you own land on a sim border, it can teleport someone home who is in the next sim if they are close to the border (I've actually had this happen to me). - Jon _____________________ Come visit Marlin Engineering at Horseshoe (222, 26) to see my line of flying vehicles.
Jillian Callahan Rotary-winged Neko Girl Join date: 24 Jun 2004 Posts: 3,766	06-28-2005 09:54 llSensor does not seem to work across a sim border. However, llSensorRepeat does, on the third or fourth iteration. _____________________
Strife Onizuka Moonchild Join date: 3 Mar 2004 Posts: 5,887	06-28-2005 09:56 Sensors I beleive have a 10 meter buffer into adjacent sims. _____________________ Truth is a river that is always splitting up into arms that reunite. Islanded between the arms, the inhabitants argue for a lifetime as to which is the main river. - Cyril Connolly Without the political will to find common ground, the continual friction of tactic and counter tactic, only creates suspicion and hatred and vengeance, and perpetuates the cycle of violence. - James Nachtwey
Christopher Omega Oxymoron Join date: 28 Mar 2003 Posts: 1,828	06-28-2005 10:42 Sensors are very finiky about working across sim borders. Sometimes they do, sometimes they dont. I wouldn't rely on them for a flying pet. Instead, I would wear an attachment that chats my position (llGetPos() and llGetRegionCorner()) and my rotation. Then, the pet can listen for the data, parse it, and move to the offset it needs to move to. Chat crosses sim borders quite reliably. See the wiki page on global coordinates to get an idea of why I said use both llGetPos and llGetRegionCorner. ==Chris _____________________ October 3rd is the Day Against DRM (Digital Restrictions Management), learn more at http://www.defectivebydesign.org/what_is_drm

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llDetectedPos() across a sim border