Difference between revisions of "LlSetLinkAlpha"
Kireji Haiku (talk | contribs) m (broke some lines for better readability on older screens) |
Omei Qunhua (talk | contribs) (Corrected 2nd example script which had been left in a non-compilable state... (float) TRUE and (float) FALSE are just HORRIBLE! ... Removed superfluous code.) |
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| Line 34: | Line 34: | ||
</lsl> | </lsl> | ||
<lsl> | <lsl> | ||
// when the object | // when the object is touched, | ||
// fade it out and back in again | // fade it out and back in again | ||
| Line 41: | Line 41: | ||
touch_start(integer num_detected) | touch_start(integer num_detected) | ||
{ | { | ||
// fade out | // fade out | ||
float alpha = 1.0; | float alpha = 1.0; | ||
while (0.0 | while (alpha >= 0.0) | ||
{ | { | ||
llSetLinkAlpha(LINK_SET, alpha, ALL_SIDES); | |||
alpha -= 0.001; | alpha -= 0.001; | ||
} | } | ||
// fade in | // fade in | ||
while (alpha < 1.0) | while (alpha < 1.0) | ||
{ | { | ||
| Line 61: | Line 55: | ||
llSetLinkAlpha(LINK_SET, alpha, ALL_SIDES); | llSetLinkAlpha(LINK_SET, alpha, ALL_SIDES); | ||
} | } | ||
} | } | ||
} | } | ||
Revision as of 13:43, 13 December 2012
| LSL Portal | Functions | Events | Types | Operators | Constants | Flow Control | Script Library | Categorized Library | Tutorials |
Summary
Function: llSetLinkAlpha( integer link, float alpha, integer face );| 0.0 | Forced Delay |
| 10.0 | Energy |
If a prim exists in the link set at link, set alpha on face of that prim.
| • integer | link | – | Link number (0: unlinked, 1: root prim, >1: child prims and seated avatars) or a LINK_* flag
|
|
| • float | alpha | – | from 0.0 (clear) to 1.0 (solid) (0.0 <= alpha <= 1.0) | |
| • integer | face | – | face number or ALL_SIDES |
If face is ALL_SIDES then the function works on all sides.
|
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Caveats
- The function silently fails if its face value indicates a face that does not exist.
Examples
<lsl> // Make the entire object disappear for 5 seconds
default {
touch_start(integer num_detected)
{
// transparent
llSetLinkAlpha(LINK_SET, 0.0, ALL_SIDES);
llSetTimerEvent(5.0);
}
timer()
{
// opaque
llSetLinkAlpha(LINK_SET, 1.0, ALL_SIDES);
llSetTimerEvent(0.0);
}
} </lsl> <lsl> // when the object is touched, // fade it out and back in again
default {
touch_start(integer num_detected)
{
// fade out
float alpha = 1.0;
while (alpha >= 0.0)
{
llSetLinkAlpha(LINK_SET, alpha, ALL_SIDES);
alpha -= 0.001;
}
// fade in
while (alpha < 1.0)
{
alpha += 0.001;
llSetLinkAlpha(LINK_SET, alpha, ALL_SIDES);
}
}
} </lsl> <lsl> // Makes selected prims in a linkset become transparent or visible on chat command. Give each prim a unique name.
list PrimList; default {
changed (integer change)
{
if (change & CHANGED_LINK)
llResetScript();
}
state_entry()
{
integer NumLink = llGetNumberOfPrims();
llListen(37, "", NULL_KEY, "");
integer i;
for (i = 1; i <= NumLink; ++i)
PrimList += llGetLinkName(i);
}
listen(integer channel, string name, key id, string msg)
{
list temp = llCSV2List(msg);
integer len = llGetListLength (temp);
string Alpha = llToUpper(llList2String(temp, 0));
integer i;
for (i = 1; i < len; ++i)
{
string ThisPrim = llStringTrim(llList2String(temp, i), STRING_TRIM);
integer idx = llListFindList(PrimList, [ThisPrim]);
if (~idx)
{
//Ex: SHOW,plate,spoon, napkin <---- makes named prims visible
if (Alpha == "SHOW")
llSetLinkAlpha(idx + 1, 1.0, ALL_SIDES);
//Ex: HIDE, butter knife, glass, fork, spoon <--- makes named prims transparent
else if (Alpha == "HIDE")
llSetLinkAlpha(idx + 1, 0.0, ALL_SIDES);
}
else if (llToUpper(ThisPrim) == "ALL")
{
//Ex: SHOW, ALL <--- makes the entire linkset visible
if (Alpha == "SHOW")
llSetLinkAlpha(LINK_SET, 1.0, ALL_SIDES);
//Ex: HIDE, All <--- makes the entire linkset transparent
else if (Alpha == "HIDE")
llSetLinkAlpha(LINK_SET, 0.0, ALL_SIDES);
}
}
}
}
</lsl>Notes
Link Numbers
Each prim that makes up an object has an address, a link number. To access a specific prim in the object, the prim's link number must be known. In addition to prims having link numbers, avatars seated upon the object do as well.
- If an object consists of only one prim, and there are no avatars seated upon it, the (root) prim's link number is zero.
- However, if the object is made up of multiple prims or there is an avatar seated upon the object, the root prim's link number is one.
When an avatar sits on an object, it is added to the end of the link set and will have the largest link number. In addition to this, while an avatar is seated upon an object, the object is unable to link or unlink prims without unseating all avatars first.
Counting Prims & Avatars
There are two functions of interest when trying to find the number of prims and avatars on an object.
llGetNumberOfPrims()- Returns the number of prims and seated avatars.llGetObjectPrimCount(llGetKey())- Returns only the number of prims in the object but will return zero for attachments.
integer GetPrimCount() { //always returns only the number of prims
if(llGetAttached())//Is it attached?
return llGetNumberOfPrims();//returns avatars and prims but attachments can't be sat on.
return llGetObjectPrimCount(llGetKey());//returns only prims but won't work on attachments.
}
Errata
If a script located in a child prim erroneously attempts to access link 0, it will get or set the property of the linkset's root prim. This bug (BUG-5049) is preserved for broken legacy scripts.
See Also
Events
| • | changed | – | CHANGED_COLOR |
Functions
| • | llGetLinkNumber | – | Returns the link number of the prim the script is in. | |
| • | llGetAlpha | – | Gets the prim's alpha | |
| • | llSetAlpha | – | Sets the prim's alpha | |
| • | llGetColor | – | Gets the prim's color | |
| • | llSetColor | – | Sets the prim's color | |
| • | llSetLinkColor | |||
| • | llSetLinkTexture | |||
| • | llSetLinkPrimitiveParams |
Articles
| • | Translucent Color |