Difference between revisions of "LlCos"

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{{lowercase|llCos}}
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{{LSL_Function
__NOTOC__
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|inject-2={{LSL_Function/angle|theta}}
 
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|sort=Cos|func=llCos
{| width="100%"
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|func_id=1|func_sleep=0.0|func_energy=10.0
|-
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|func_footnote
|<div id="box">
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|p1_type=float|p1_name=theta
== [[LSL_Type_float|float]] llCos( [[LSL_Type_float|float]] theta); ==
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|return_type=float
<div style="padding: 0.5em">
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|return_text=that is the cosine of {{LSLP|theta}}.
* theta - theta in radians.
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|spec
</div>
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|caveats=because of IEE754 on single floats, llCos(PI_BY_TWO) returns -4.371139E-8  (hex : 0xB33BBD2E ) and not 0 ; llCos(PI/3.0) returns 0.49999997 ( hex : 0x3EFFFFFF ) and not 0.5
</div>
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|examples=<source lang="lsl2">// Touch the object with this script in it to see the cosine of random numbers!
|-
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default
|
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{
<div id="box">
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    touch_start(integer num)
 
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    {
== Specification ==
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        float r = llFrand(TWO_PI);
<div style="padding: 0.5em">
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        llOwnerSay("The cosine of " + (string)r + " in radians or " + (string)(r * RAD_TO_DEG) + " in degrees is " + (string)llCos(r));
Returns the cosine of theta radians.
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    }
{|  
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}</source>
|-  
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|helpers
| [[LSL_Energy|Energy]]:
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|also_functions=
| 10.0
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{{LSL DefineRow|[[llSin]]|[[llAsin]]|sine & inverse Sine}}
|-  
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{{LSL DefineRow||[[llAcos]]|inverse cosine}}
| [[LSL_Sleep|Sleep]]:
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{{LSL DefineRow|[[llTan]]|[[llAtan2]]|tangent & inverse tangent}}
| 0.0  
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|notes
|-
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|cat1
| [[LSL_Function_ID|Function ID]]:
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|cat2
| 1
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|cat3
|}
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|cat4=Math/Trigonometry
</div>
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}}
</div>
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|-
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|
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<div id="box">
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== Caveats ==
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<div style="padding: 0.5em">
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</div>
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</div>
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|-
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|
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<div id="box">
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== Examples ==
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<div style="padding: 0.5em">
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<lsl>
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</lsl>
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</div>
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</div>
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|-
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|
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<div id="box">
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== Helper Functions ==
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<div style="padding: 0.5em">
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<lsl>
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</lsl>
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</div>
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</div>
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|-
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|
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<div id="box">
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== See Also ==
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<div style="padding: 0.5em">
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</div>
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</div>
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|-
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|
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<div id="box">
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== Notes ==
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<div style="padding: 0.5em">
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Function ID: 1
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</div>
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</div>
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|}
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[[Category:LSL_Functions]]
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[[Category:LSL_Math]]
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Latest revision as of 14:31, 14 September 2015

Summary

Function: float llCos( float theta );

Returns a float that is the cosine of theta.

• float theta angle expressed in radians

Caveats

because of IEE754 on single floats, llCos(PI_BY_TWO) returns -4.371139E-8 (hex : 0xB33BBD2E ) and not 0 ; llCos(PI/3.0) returns 0.49999997 ( hex : 0x3EFFFFFF ) and not 0.5

All Issues ~ Search JIRA for related Bugs

Examples

// Touch the object with this script in it to see the cosine of random numbers!
default
{
    touch_start(integer num)
    {
        float r = llFrand(TWO_PI);
        llOwnerSay("The cosine of " + (string)r + " in radians or " + (string)(r * RAD_TO_DEG) + " in degrees is " + (string)llCos(r));
    }
}

See Also

Functions

• llSin llAsin sine & inverse Sine
•  llAcos inverse cosine
• llTan llAtan2 tangent & inverse tangent

Deep Notes

Search JIRA for related Issues

Signature

function float llCos( float theta );