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functions:llsin [2014-05-21 16:11 SLT] sei Return value, inf, nan, add See Also |
functions:llsin [2015-02-04 18:06 SLT] (current) sei style |
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| ===== Function: llSin ===== | ===== Function: llSin ===== | ||
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| ===== Return value ===== | ===== Return value ===== | ||
| - | A [[types/float]] with the sine of the argument. | + | A $lty[float] with the sine of the argument. |
| ===== Notes ===== | ===== Notes ===== | ||
| - | * Inputs of **-Infinity**, **Infinity** and **NaN** result in **NaN**. | + | * Inputs of $minf, $pinf and $nan result in $nan. |
| * If the angle is otherwise not between approx. -9.22337e18 and 9.22337e18, the argument is returned unchanged. | * If the angle is otherwise not between approx. -9.22337e18 and 9.22337e18, the argument is returned unchanged. | ||
| * Otherwise, the return value is always between -1 and 1. | * Otherwise, the return value is always between -1 and 1. | ||
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| <code lsl2> | <code lsl2> | ||
| float F; | float F; | ||
| - | F = llSin(1); // Sets F to approx. 0.841471, because that's the sine of 1 radian. | + | F = llSin(1); // Sets F to approx. 0.841471, which is the sine of 1 radian. |
| - | F = llSin(-1); // Sets F to approx. -0.841471, because that's the sine of -1 radian. | + | F = llSin(-1); // Sets F to approx. -0.841471, which is the sine of -1 radian. |
| - | F = llSin(0); // Sets F to 0, because that's the sine of 0. | + | F = llSin(0); // Sets F to 0, which is the sine of 0. |
| F = llSin(PI); // Sets F to approximately 0, which is the sine of PI. | F = llSin(PI); // Sets F to approximately 0, which is the sine of PI. | ||
| // It isn't exactly 0 because of rounding/calculation errors. | // It isn't exactly 0 because of rounding/calculation errors. | ||
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| ===== Complete examples ===== | ===== Complete examples ===== | ||
| - | llSin is very frequently used together with [[llCos]], as llCos gives the X component and llSin the Y component of a unit 2D vector at the given angle. | + | $fn[llSin] is very frequently used together with $lfn[llCos], as $fn[llCos] gives the X component and $fn[llSin] the Y component of a unit 2D vector at the given angle. |
| <file lsl2 llSin-llCos-example.lsl> | <file lsl2 llSin-llCos-example.lsl> | ||
| Line 56: | Line 57: | ||
| </file> | </file> | ||
| - | The opposite calculation, i.e. finding the angle of a 2D vector, can be performed with [[llAtan2]]. | + | The opposite calculation, i.e. finding the angle of a 2D vector, can be performed with $lfn[llAtan2]. |
| ===== See also ===== | ===== See also ===== | ||
| === Related trigonometric functions === | === Related trigonometric functions === | ||
| - | * [[llCos]] calculates the cosine of the argument. | + | * $lfn[llCos] calculates the cosine of the argument. |
| - | * [[llAsin]] calculates the inverse sine of the argument. | + | * $lfn[llAsin] calculates the inverse sine of the argument. |
| - | * [[llAtan2]] calculates the angle of a 2D vector. | + | * $lfn[llAtan2] calculates the angle of a 2D vector. |
| === Other trigonometric functions === | === Other trigonometric functions === | ||
| - | * [[llAcos]] calculates the inverse cosine of the argument. | + | * $lfn[llAcos] calculates the inverse cosine of the argument. |
| - | * [[llTan]] calculates the tangent of the argument. | + | * $lfn[llTan] calculates the tangent of the argument. |
| === Related information === | === Related information === | ||
| - | * [[types/float]] type and associated caveats and limitations. | + | * $lty[float] type and associated caveats and limitations. |