llRot2Axis

vector llRot2Axis(rotation Rotation)

Returns the rotation axis represented by Rotation.

Returns the axis represented by the Rotation.

Parameters

Rotation (rotation)

Technical Details

Return Type: vector
Energy: 10

This function extracts the rotation axis (the vector around which rotation occurs) from a rotation value. The axis is normalized and represents the direction of the rotation.

Implementation Examples

Here are two equivalent implementations of llRot2Axis:

vector llRot2Axis(rotation a) {
    if(a.s < 0)
        return -llVecNorm(<a.x, a.y, a.z>);
    return llVecNorm(<a.x, a.y, a.z>)
}

Or more concisely:

vector llRot2Axis(rotation a) {
    return llVecNorm(<a.x, a.y, a.z>) * (1 | -(a.s < 0));
}

The key insight is that the x, y, z components of a rotation represent the axis, and the function normalizes this vector. The scalar component s determines the sign of the result.

llRot2Axis

Implementation Examples

See Also