Second Life Forums Archive - Converting local offset to region coordinates

Chandra Page

Build! Code. Sleep?

Join date: 7 Oct 2004

Posts: 360

01-12-2005 00:23

I'm rezzing an object using llRezObject, and I want to have the object appear at a specific offset from the rezzing prim, using that prim's local coordinate sytem instead of the region coordinates that llRezObject uses. For example, given the vector <2, 0, 0>, I can call the following to rez an object two meters east of the rezzing prim:

CODE

llRezObject("Foo", llGetPos() + <2, 0, 0>, ZERO_VECTOR, ZERO_ROTATION, 0);

Unfortunately, if I rotate the rezzer so its local X axis points north, this still results in the object appearing 2 meters due east of the rezzer. I'd like to be able to have <2, 0, 0> specify two meters along the rezzer's local X axis, which in this case would put the rezzed object two meters north of the rezzer.

How do I go about converting a local offset into region coordinates?

_____________________

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Jillian Callahan

Rotary-winged Neko Girl

Join date: 24 Jun 2004

Posts: 3,766

01-12-2005 01:12

CODE

rotation myrot = llGetRot();
vector fwd = llRot2Fwd(myrot); // this is a vector that's one meter "forward" along the X axis.
llRezObject("Foo", llGetPos() + (fwd * 2), ZERO_VECTOR, ZERO_ROTATION, 0);

I think this'll do what you're lookin' fer.

_____________________

Strife Onizuka

Moonchild

Join date: 3 Mar 2004

Posts: 5,887

01-12-2005 02:37

rotation mine=llGetRot()

CODE


llRezObject("Foo", llGetPos() + (<2, 0, 0>*mine), ZERO_VECTOR, mine, 0);

_____________________

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

Chandra Page

Build! Code. Sleep?

Join date: 7 Oct 2004

Posts: 360

01-12-2005 15:48

Thank you, Strife. That works perfectly. I went back and re-read the Operators page in the Wiki to figure out why that works. I hadn't realized that LL defined the * operator to do exactly what I want it to do when multiplying a vector by a rotation. Spiffy.

_____________________

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Converting local offset to region coordinates
Chandra Page Build! Code. Sleep? Join date: 7 Oct 2004 Posts: 360	01-12-2005 00:23 I'm rezzing an object using llRezObject, and I want to have the object appear at a specific offset from the rezzing prim, using that prim's local coordinate sytem instead of the region coordinates that llRezObject uses. For example, given the vector <2, 0, 0>, I can call the following to rez an object two meters east of the rezzing prim: CODE llRezObject("Foo", llGetPos() + <2, 0, 0>, ZERO_VECTOR, ZERO_ROTATION, 0); Unfortunately, if I rotate the rezzer so its local X axis points north, this still results in the object appearing 2 meters due east of the rezzer. I'd like to be able to have <2, 0, 0> specify two meters along the rezzer's local X axis, which in this case would put the rezzed object two meters north of the rezzer. How do I go about converting a local offset into region coordinates? _____________________ Come visit the In Effect main store and café Drawbridge (160, 81) Particle effects, fashion, accessories, and coffee! On the Web at SL Exchange and SL Boutique
Jillian Callahan Rotary-winged Neko Girl Join date: 24 Jun 2004 Posts: 3,766	01-12-2005 01:12 CODE rotation myrot = llGetRot(); vector fwd = llRot2Fwd(myrot); // this is a vector that's one meter "forward" along the X axis. llRezObject("Foo", llGetPos() + (fwd * 2), ZERO_VECTOR, ZERO_ROTATION, 0); I think this'll do what you're lookin' fer. _____________________
Strife Onizuka Moonchild Join date: 3 Mar 2004 Posts: 5,887	01-12-2005 02:37 rotation mine=llGetRot() CODE llRezObject("Foo", llGetPos() + (<2, 0, 0>*mine), ZERO_VECTOR, mine, 0); _____________________ 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
Chandra Page Build! Code. Sleep? Join date: 7 Oct 2004 Posts: 360	01-12-2005 15:48 Thank you, Strife. That works perfectly. I went back and re-read the Operators page in the Wiki to figure out why that works. I hadn't realized that LL defined the * operator to do exactly what I want it to do when multiplying a vector by a rotation. Spiffy. _____________________ Come visit the In Effect main store and café Drawbridge (160, 81) Particle effects, fashion, accessories, and coffee! On the Web at SL Exchange and SL Boutique

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Converting local offset to region coordinates