Difference between revisions of "LlFabs"
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Frionil Fang (talk | contribs) (like llAbs, llFabs isn't strictly necessary, though can't bitshift so avoiding the function isn't quite as powerful and it produces NaNs for infinity/+0 for -0) |
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|also_articles={{LSL DefineRow||{{Wikipedia|Absolute value}}|}} | |also_articles={{LSL DefineRow||{{Wikipedia|Absolute value}}|}} | ||
|notes | |notes=*Using <code>{{LSLP|val}}-2*{{LSLP|val}}*({{LSLP|val}}<0)</code> is roughly 60% faster than llFabs as it avoids a function call, though it produces {{abbr|NaN|not a number}} if given an infinite value and (correctly) returns 0.0 instead of -0.0 when taking the absolute value of negative zero. | ||
|cat1=Math | |cat1=Math | ||
|cat2=Float | |cat2=Float | ||
Latest revision as of 15:11, 28 October 2023
| LSL Portal | Functions | Events | Types | Operators | Constants | Flow Control | Script Library | Categorized Library | Tutorials |
Summary
Function: float llFabs( float val );| 7 | Function ID |
| 0.0 | Forced Delay |
| 10.0 | Energy |
Returns a float that is the positive version of val.
| • float | val | – | Any valid float value |
| This function is similar to functions () found in many other languages: | ||
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Caveats
Important Issues
~ All Issues ~ Search JIRA for related Bugs
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SCR-439 | A | Mono only: llFabs of Negative Zero is negative, should be positive. |
Examples
default
{
state_entry()
{
llSay(0,"The (Float)absolute value of -4.5 is: "+(string)llFabs(-4.5) );
}
}
// returns :
// The (Float)absolute value of -4.5 is: 4.500000
Notes
- Using
val-2*val*(val<0)is roughly 60% faster than llFabs as it avoids a function call, though it produces NaN if given an infinite value and (correctly) returns 0.0 instead of -0.0 when taking the absolute value of negative zero.
See Also
Deep Notes
All Issues
~ Search JIRA for related Issues|
|
|
SCR-439 | A | Mono only: llFabs of Negative Zero is negative, should be positive. |
Signature |
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function float llFabs( float val ); |
Haiku |
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Even with all your little bits intact,
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