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===== Function: llAngleBetween =====

<code lsl2>
float llAngleBetween(rotation r1, rotation r2)
</code>

Return the angle between two rotations.

===== Parameters =====

=== r1 ===
The first rotation

=== r2 ===
The second rotation

===== Return value =====

Returns the angle between the two rotations.

===== Notes =====

  * Given two rotations $prm[r1] and $prm[r2], there is a third rotation that transforms one into the other, given by $prm[r2]$op[/]$prm[r1]. The angle this function returns is the angle of that last rotation. Therefore, it is roughly equivalent to ''$lfn[llRot2Angle|llRot2Angle](r2/r1)''.

===== Short examples =====

<code lsl2>
llOwnerSay((string)(llAngleBetween(<0,0,1,0>, <0,1,0,0>)*RAD_TO_DEG)); // displays 180.000000
</code>

===== See also =====

  * $lfn[llRotBetween] Rotation between two vectors.
  * $lfn[llRot2Angle] obtains the angle part of a rotation expressed as axis/angle.
  * $lfn[llRot2Axis] obtains the axis part of a rotation expressed as axis/angle.
  * $lty[rotation] type and operations.