LlRot2Up

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Contents

Summary

Function: vector llRot2Up( rotation q );
20 Function ID
0.0 Delay
10.0 Energy

Computes the orientation of the local z-axis relative to the earth.
Returns a vector that is the up vector defined by q, i.e. a unit vector pointing in the positive Z direction

• rotation q

Can be useful to identify the orientation of the local horizontal-plane of the prim, since it's z-axis is always perpendicular to this local horizontal plane.

Specification

Mathematically equivalent to: 

ret = llVecNorm(<0., 0., 1.> * q);

If q is known to be a unit quaternion then it can be simplified as: 

ret = <0., 0., 1.> * q;

Examples

See Also

Functions

•  llRot2Left
•  llRot2Fwd
•  llRot2Axis
•  llRot2Angle

Deep Notes

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