llGetNotecardLine
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Summary
Function: key llGetNotecardLine( string name, integer line );| 0.1 | Forced Delay |
| 10.0 | Energy |
Requests the line line of the notecard name from the dataserver.
Returns a key that is the handle for a dataserver event response.
| • string | name | – | a notecard in the inventory of the prim this script is in or a UUID of a notecard | |
| • integer | line | – | Line number in a notecard (the index starts at zero). |
line does not support negative indexes. If line is past the end of the notecard EOF is returned by the dataserver.
Caveats
- This function causes the script to sleep for 0.1 seconds.
- If line is out of bounds the script continues to execute without an error message.
- If name is missing from the prim's inventory and it is not a UUID or it is not a notecard then an error is shouted on DEBUG_CHANNEL.
- If name is a UUID then there are no new asset permissions consequences for the object.
- The resulting object develops no new usage restrictions that might have occurred if the asset had been placed in the prims inventory.
- If notecard contains embedded inventory items (such as textures and landmarks), EOF will be returned, regardless of the line requested.
- If the requested line is longer then 255 bytes the dataserver will return the first 255 bytes of the line.
- If the notecard is empty, the dataserver will shout on the DEBUG_CHANNEL that the notecard does not exist. This is because until a notecard is saved for the first time, it does not exist as an asset only as an inventory placeholder (llGetInventoryKey will return NULL_KEY).
Examples
<lsl> key kQuery; integer iLine = 0; default {
state_entry() {
llSay(0, "Reading notecard...");
kQuery = llGetNotecardLine("My Notecard", iLine); // read in "My Notecard" when you can
}
dataserver(key query_id, string data) {
if (query_id == kQuery) { // were we called to work on "My Notecard"?
// this is a line of our notecard
if (data == EOF) {
llSay(0, "No more lines in notecard, read " + (string)iLine + " lines.");
} else {
// increment line count
llSay(0, "Line " + (string)iLine + ": " + data); // data has the current line from this notecard
//request next line
iLine++;
kQuery = llGetNotecardLine("My Notecard", iLine); // read another line when you can
}
}
}
}
</lsl>Useful Snippets
<lsl> ///// // Generic Multi Notecard reader by Brangus Weir // Given freely and published on wiki.secondlife.com // // This script will read three note cards and store the results into three lists. // It can be modified and extended to as many (or few) cards as you'd like to read. //
list gOneCard; // All the lines from from the first card list gTwoCard; // All the lines from from the second card list gThreeCard; // All the lines from from the third card
string gsCardOneName = "One"; //Set these to the name of the invetory item. string gsCardTwoName = "Two"; string gsCardThreeName = "Three";
//Temporary variables for processing string g_sNoteCardName; // Name of the card to be read. list g_lTempLines; // The resulting data pushed into a list integer g_iLine; // The line count for the card reader key g_kQuery; // The key of the card being read
initialize(string _action) {
// Due to the execution order when using dataserver, this function sets the first card to
// be read, and the excetuion finishes when called again with the _action set to "finish".
if (_action == "") {
loadNoteCard(gsCardOneName);
} else if (_action == "finish") {
// All cards have been read into the lists... now you can do any kind of string
// manipulations to get the data you need to set your script.
// But here we will prove that the cards have been read with a loop
integer end = llGetListLength(gOneCard); //Always evaluate this once, don't do it
//INSIDE the for loop like noob programers will.
//Reduce lag, THINK ABOUT MACHINE CYCLES!
integer i = 0;
for (; i< end; ++i)
llSay(0, llList2String(gOneCard,i));
end = llGetListLength(gTwoCard);
for (i = 0; i< end; ++i)
llSay(0, llList2String(gTwoCard,i));
end = llGetListLength(gThreeCard);
for (i = 0; i< end; ++i)
llSay(0, llList2String(gThreeCard,i));
}
}
loadNoteCard( string _notecard ) {
g_lTempLines = []; //clear the temp lines g_sNoteCardName = _notecard; g_iLine = 0; g_kQuery = llGetNotecardLine(g_sNoteCardName, g_iLine);
}
notecardFinished(string _notecard){
// Called at the end of each notecard as it is read. The temp results are stored
// and the next card is commanded to be read.
if (_notecard == gsCardOneName) {
gOneCard = g_lTempLines;
loadNoteCard(gsCardTwoName);
} else if (_notecard == gsCardTwoName) {
gTwoCard = g_lTempLines;
loadNoteCard(gsCardThreeName);
} else if (_notecard == gsCardThreeName) {
gThreeCard = g_lTempLines;
initialize("finish"); // Finally pass exection to finish the initialization.
}
}
default {
state_entry()
{
}
touch_start(integer _num_det){
initialize("");
}
dataserver(key _query_id, string _data)
{
if (_query_id == g_kQuery) {
// this is a line of our notecard
if (_data != EOF) {
// increment line count
g_lTempLines += [_data];
//request a next line
g_iLine++;
g_kQuery = llGetNotecardLine(g_sNoteCardName, g_iLine);
} else {
//The notecard has been read
//notify end of read
notecardFinished(g_sNoteCardName);
}
}
}
} </lsl>
Notes
The notecard read can be no modify, or no modify/no copy.
See Also
Deep Notes
Signature |
|---|
function key llGetNotecardLine( string name, integer line ); |