Second Life Forums Archive - string to vector?

Hg Beeks

llGetElement(80);

Join date: 13 Apr 2006

Posts: 134

02-25-2007 15:48

Hello again.
I'm noticing one major weakness in all of the methods in which to convey information from one object to another - No vectors can be passed between them. llListen picks up strings, llMessageLinked picks up strings, integers and keys... But no vectors. So, the only possible way I can figure to pass a vector to objects would be to send it as a string, then have it convert it into a vector - But I can't figure out how to do that. Any suggestions?
Edit: Clarification - The string I'm passing is llGetColor in a string through a llMessageLinked.

Ged Larsen

thwarted by quaternions

Join date: 4 Dec 2006

Posts: 294

02-25-2007 17:00

From: Hg Beeks

Hello again.
I'm noticing one major weakness in all of the methods in which to convey information from one object to another - No vectors can be passed between them. llListen picks up strings, llMessageLinked picks up strings, integers and keys... But no vectors. So, the only possible way I can figure to pass a vector to objects would be to send it as a string, then have it convert it into a vector - But I can't figure out how to do that. Any suggestions?
Edit: Clarification - The string I'm passing is llGetColor in a string through a llMessageLinked.

You need to typecast. For example:

CODE


string s = "<1.0, 2.0, 3.0>";  // s is a string
   vector v = (vector)s;  // v is a vector
  llOwnerSay("And then back to a string again: "+(string)v); // cast v from vector back to string, to include in a Say

_____________________

- LoopRez, flexi prim skirt generating tool
- LinkRez, a necklace chain generator

Hg Beeks

llGetElement(80);

Join date: 13 Apr 2006

Posts: 134

02-25-2007 17:37

I'm starting with a vector, converting it to string, then trying to convert it back to vector, not to string. I'm trying to send the color information from one prim to its children, so that they can match the color.

llMessageLinked(-1, 0, (string)llGetColor(ALL_SIDES), ""

;

sends the vector the same as you show it - <0.7832, 0.80278, 0.5978>.
However, when the children try to use this information using

llSetColor((vector)text, ALL_SIDES);

they turn full black.

Baron Hauptmann

Just Designs / Scripter

Join date: 29 Oct 2005

Posts: 358

02-25-2007 19:30

Just for grins, do an llOwnerSay of each string along the way . . . see if it changes; especially see if the children hear what you think they hear.

Also, you use llGetColor(ALL_SIDES). Is the color the same on all sides? Would it be any better to just get the color from one side?

Otherwise, this technique of typecasting should work. I've used it to transmit via link messages, and it seems to work fine.

Baron H.

Hg Beeks

llGetElement(80);

Join date: 13 Apr 2006

Posts: 134

02-25-2007 20:05

I actually tested that first; It spits back the same string every time. and yes, the color is the same on all sides. I'll post the code when I get home for further inspection.

AJ DaSilva

woz ere

Join date: 15 Jun 2005

Posts: 1,993

02-25-2007 20:55

I'm working on a project where I send vector data through strings at the moment.

Mostly it works as you'd expect, I have found that parsing a string into a list then pulling the vector directly with llList2Vector(aList,i) doesn't work and you have to use (vector)llList2String(aList,i) instead.

Newgate Ludd

Out of Chesse Error

Join date: 8 Apr 2005

Posts: 2,103

02-26-2007 00:46

The casting to string and then back to vector should work fine, its how my own colouring system works.

Script fragment - Sender

CODE


vector vcolour = llList2Vector(lColours, iIndex );
string msg = "COLOUR:" + (string)vcolour;
llShout(ChannelNum,msg);

Script Fragment - Receiver

CODE


    listen( integer channel, string name, key id, string message )
    {
        list lData = llParseString2List(message, [":"], [""]);
        string command = llList2String(lData, 0);
        string item = llList2String(lData, 1);
        integer side = ALL_SIDES;
        if("COLOUR" == command)
        {
            vector clr = (vector)item;
            llSetColor(clr,side);
        }
    }

Although it wont help with your application, I've actually gone away from using vectors to store the colours, just using strings to save on converting from list to vector to string and then back to vector.

string to vector?
Hg Beeks llGetElement(80); Join date: 13 Apr 2006 Posts: 134	02-25-2007 15:48 Hello again. I'm noticing one major weakness in all of the methods in which to convey information from one object to another - No vectors can be passed between them. llListen picks up strings, llMessageLinked picks up strings, integers and keys... But no vectors. So, the only possible way I can figure to pass a vector to objects would be to send it as a string, then have it convert it into a vector - But I can't figure out how to do that. Any suggestions? Edit: Clarification - The string I'm passing is llGetColor in a string through a llMessageLinked.
Ged Larsen thwarted by quaternions Join date: 4 Dec 2006 Posts: 294	02-25-2007 17:00 From: Hg Beeks Hello again. I'm noticing one major weakness in all of the methods in which to convey information from one object to another - No vectors can be passed between them. llListen picks up strings, llMessageLinked picks up strings, integers and keys... But no vectors. So, the only possible way I can figure to pass a vector to objects would be to send it as a string, then have it convert it into a vector - But I can't figure out how to do that. Any suggestions? Edit: Clarification - The string I'm passing is llGetColor in a string through a llMessageLinked. You need to typecast. For example: CODE string s = "<1.0, 2.0, 3.0>"; // s is a string vector v = (vector)s; // v is a vector llOwnerSay("And then back to a string again: "+(string)v); // cast v from vector back to string, to include in a Say _____________________ - LoopRez, flexi prim skirt generating tool - LinkRez, a necklace chain generator
Hg Beeks llGetElement(80); Join date: 13 Apr 2006 Posts: 134	02-25-2007 17:37 I'm starting with a vector, converting it to string, then trying to convert it back to vector, not to string. I'm trying to send the color information from one prim to its children, so that they can match the color. llMessageLinked(-1, 0, (string)llGetColor(ALL_SIDES), ""; sends the vector the same as you show it - <0.7832, 0.80278, 0.5978>. However, when the children try to use this information using llSetColor((vector)text, ALL_SIDES); they turn full black.
Baron Hauptmann Just Designs / Scripter Join date: 29 Oct 2005 Posts: 358	02-25-2007 19:30 Just for grins, do an llOwnerSay of each string along the way . . . see if it changes; especially see if the children hear what you think they hear. Also, you use llGetColor(ALL_SIDES). Is the color the same on all sides? Would it be any better to just get the color from one side? Otherwise, this technique of typecasting should work. I've used it to transmit via link messages, and it seems to work fine. Baron H.
Hg Beeks llGetElement(80); Join date: 13 Apr 2006 Posts: 134	02-25-2007 20:05 I actually tested that first; It spits back the same string every time. and yes, the color is the same on all sides. I'll post the code when I get home for further inspection.
AJ DaSilva woz ere Join date: 15 Jun 2005 Posts: 1,993	02-25-2007 20:55 I'm working on a project where I send vector data through strings at the moment. Mostly it works as you'd expect, I have found that parsing a string into a list then pulling the vector directly with llList2Vector(aList,i) doesn't work and you have to use (vector)llList2String(aList,i) instead.
Newgate Ludd Out of Chesse Error Join date: 8 Apr 2005 Posts: 2,103	02-26-2007 00:46 The casting to string and then back to vector should work fine, its how my own colouring system works. Script fragment - Sender CODE vector vcolour = llList2Vector(lColours, iIndex ); string msg = "COLOUR:" + (string)vcolour; llShout(ChannelNum,msg); Script Fragment - Receiver CODE listen( integer channel, string name, key id, string message ) { list lData = llParseString2List(message, [":"], [""]); string command = llList2String(lData, 0); string item = llList2String(lData, 1); integer side = ALL_SIDES; if("COLOUR" == command) { vector clr = (vector)item; llSetColor(clr,side); } } Although it wont help with your application, I've actually gone away from using vectors to store the colours, just using strings to save on converting from list to vector to string and then back to vector.

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string to vector?