Difference between revisions of "LlAxes2Rot"
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|p3_type=vector|p3_name=up | |p3_type=vector|p3_name=up | ||
|return_text=that is defined by the 3 coordinate axes | |return_text=that is defined by the 3 coordinate axes | ||
|notes=Technically, only the first two vectors are needed to define this rotation, which can be done by calling: | |notes=Technically, only the first two vectors are needed to define this rotation, which can be done by calling any of these: | ||
< | <lsl>llAxes2Rot(fwd, left, fwd % left); | ||
llAxes2Rot(left % up, left, up); | |||
llAxes2Rot(fwd, up % fwd, up);</lsl> | |||
|spec | |spec | ||
|caveats | |caveats | ||
|examples=<lsl> | |examples=<lsl>default | ||
default | |||
{ | { | ||
state_entry() | state_entry() | ||
Revision as of 12:20, 7 July 2009
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Summary
Function: rotation llAxes2Rot( vector fwd, vector left, vector up );| 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.
Examples
<lsl>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) ); }
}</lsl>
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: <lsl>llAxes2Rot(fwd, left, fwd % left); llAxes2Rot(left % up, left, up); llAxes2Rot(fwd, up % fwd, up);</lsl>
Deep Notes
Signature |
|---|
function rotation llAxes2Rot( vector fwd, vector left, vector up ); |