llVecMag

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/LSL

VecMag

llVecMag

Summary

Function: float llVecMag( vector vec );

12	Function ID
0.0	Forced Delay
10.0	Energy

Returns a float that is the magnitude of the vector (the undirected non-negative distance from vec to <0.0, 0.0, 0.0>).

• vector

vec

Caveats

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Examples

default {
    state_entry()
    {
        vector input = <1.0,2.0,3.0>;
        llSay(0,"The magnitude of "+(string)input+" is "+(string)llVecMag(input) + ".");
    }
}

Notes

• Mathematically the formula for vector magnitude is
  • llSqrt(vec.x * vec.x + vec.y * vec.y + vec.z * vec.z)
• Knowing this, there are ways to circumvent llVecMag for more efficient code.
  • vec*vec < 16.0 is over twice as fast as llVecMag(vec) < 4.0.
  • vec*vec < (dist*dist) is about twice as fast as llVecMag(vec) < dist.
  • This can work in many other ways, too, with other comparisons.

See Also

Functions

•	llVecNorm	–	The vector normal
•	llVecDist	–	The distance between two vectors

Deep Notes

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Signature
function float llVecMag( vector vec );