llGroundNormal

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/LSL

GroundNormal

llGroundNormal

Summary

Function: vector llGroundNormal( vector offset );

0.0	Forced Delay
10.0	Energy

Returns a vector that is the ground  normal from the current position + offset.

• vector

offset

–

offset relative to the prim's position and expressed in local coordinates

The requested position needs to be in the same region. Only the x and y coordinates in offset are important, the z component is ignored.

Specification

This function is defined as:

vector llGroundNormal(vector offset)
{
    vector slope = llGroundSlope(offset);
    return <slope.x, slope.y, 1.0>;
}

Examples

Notes

• There seems to some confusion be between a Surface Normal (the direction from the surface) and Normalized Vector (a vector with a magnitude of 1.0, AKA Unit Vector). This function does not return a unit vector. Surface normals may encode additional information in the magnitude of the vector. If you need a Unit Vector, simply use llVecNorm.

See Also

Functions

•	llGround	–	Gets the ground height
•	llGroundContour	–	Gets the ground contour
•	llGroundSlope	–	Gets the ground slope

Deep Notes

History

• llGroundNormal Added in SL 0.9.0^[1]

Footnotes

1. ^ Early release notes were not very accurate or thorough, they sometimes included information about features added in previous releases or failed to include information about features added in that release.

Signature
function vector llGroundNormal( vector offset );