vector llGroundNormal(vector offset);
the normal vector
to the ground
at the object's position
The normal vector is orthogonal
(perpendicular) to the surface of the ground and is always orthogonal to llGroundSlope
For example, on a perfectly flat, level area of land, the ground normal would be <0,0,1>
(straight up; the z-axis
Compare to llGroundContour
*this is offset isn't local?! ....data indicates that!
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