llAxes2Rot
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Summary
Function: rotation llAxes2Rot( vector fwd, vector left, vector up );| 17 | Function ID |
| 0.0 | Forced Delay |
| 10.0 | Energy |
Returns a rotation that is defined by the 3 coordinate axes
| • vector | fwd | |||
| • vector | left | |||
| • vector | up |
All three vectors must be mutually orthogonal unit vectors.
Caveats
Examples
default
{
state_entry()
{
vector i = < 1.0, 0.0, 0.0>;
vector j = < 0.0, 1.0, 0.0>;
vector k = < 0.0, 0.0, 1.0>;
rotation rot = llAxes2Rot( j, -i, k );
llSay(0, (string) (llRot2Euler(rot) * RAD_TO_DEG) );
}
}
This script displays:
Object: <-0.00000, 0.00000, 90.00000>which shows that (j, -i, k) is obtained by rotating (i, j, k) 90 degrees around z direction.
Notes
Technically, only the first two vectors are needed to define this rotation, which can be done by calling any of these:
llAxes2Rot(fwd, left, fwd % left);
llAxes2Rot(left % up, left, up);
llAxes2Rot(fwd, up % fwd, up);
Deep Notes
Tests
| • | Visual illustration | – | Importance of mutually orthogonal unit vectors |
Signature |
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function rotation llAxes2Rot( vector fwd, vector left, vector up ); |
Haiku |
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quaternions rule
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