Difference between revisions of "LlGetAlpha"

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|func_id=50|func_sleep=0.0|func_energy=10.0
|func_id=50|func_sleep=0.0|func_energy=10.0
|func=llGetAlpha|return_type=float|p1_type=integer|p1_name=face
|func=llGetAlpha|return_type=float|p1_type=integer|p1_name=face
|func_footnote=The return is in the [http://id.mind.net/~zona/mmts/miscellaneousMath/intervalNotation/intervalNotation.html range] [0, 1] times the number of sides requested.
|func_footnote=The return is in the [http://id.mind.net/~zona/mmts/miscellaneousMath/intervalNotation/intervalNotation.html range] [0, 1] times the number of faces requested.
|func_desc
|func_desc
|return_text=that is the alpha of '''face'''.
|return_text=that is the alpha of '''face'''.

Revision as of 04:33, 8 May 2009

Summary

Function: float llGetAlpha( integer face );
0.0 Forced Delay
10.0 Energy

Returns a float that is the alpha of face.

• integer face face number or ALL_SIDES

If face is ALL_SIDES then the function returns the sum of alpha of all the faces on the prim. The return is in the range [0, 1] times the number of faces requested.

Caveats

  • If face indicates a face that does not exist the return is 0.0

Examples

<lsl>//Tells the owner the alpha on all sides default {

   state_entry()
   {
       integer i = 0;
       integer max = llGetNumberOfSides();
       while(i < max)
       {
           llSay(0,"Face "+(string)i+" alpha is " + (string)llGetAlpha(i));
           ++i;
       }
   }
}</lsl>

Useful Snippets

<lsl>float AveragePrimAlpha() {//Since this is so simple you may just want to inline it instead of including the function.

   return (llGetAlpha(ALL_SIDES) / llGetNumberOfSides());

}</lsl>

See Also

Functions

•  llSetAlpha Sets the prim's alpha
•  llGetColor Gets the prim's color
•  llSetColor Sets the prim's color
•  llSetLinkColor Sets link's color
•  llSetLinkAlpha Sets link's alpha
•  llGetNumberOfSides Gets the number of faces on the prim

Articles

•  Translucent Color

Deep Notes

Signature

function float llGetAlpha( integer face );