Difference between revisions of "LlAxisAngle2Rot"
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{{ | {{LSL_Function | ||
|func=llAxisAngle2Rot | |||
|func_id=169|func_sleep=0.0|func_energy=10.0 | |||
|return_type=rotation | |||
|p1_type=vector|p1_name=axis|p1_desc | |||
|p2_type=float|p2_name=angle|p2_desc=expressed in radians. | |||
|return_text=that is a generated '''angle''' about '''axis''' | |||
|func_footnote= | |||
'''axis''' need not be [[llVecNorm|normalized]], only the direction is important. | |||
'''angle''' need to be between the value 0<angle<PI (higher values than PI lead to 2*PI-angle) | |||
, because a rotation is not really a rotation (it is more of a rigid motion/mirroring) | |||
,the final destination is the rotation. | |||
(in other words: it doesn't matter wether you rotate left by 90 degrees or right by 270 degrees it will return the same rotation) | |||
|spec | |||
|caveats | |||
|examples=<source lang="lsl2">default | |||
{ | |||
state_entry() | |||
{ | |||
vector axis = <0.0, 0.0, 1.0>; | |||
float angle = 90.0 * DEG_TO_RAD; | |||
rotation rot = llAxisAngle2Rot(axis, angle); | |||
vector euler = llRot2Euler(rot) * RAD_TO_DEG; | |||
llOwnerSay((string) euler); | |||
//Says <0.0, 0.0, 90.0> since it is rotating 90 degrees on the Z axis caused by the 1.0 placed in the Z vector spot. | |||
} | |||
}</source> | |||
|helpers | |||
|also_functions= | |||
{{LSL DefineRow||[[llRot2Angle]]|}} | |||
{{LSL DefineRow||[[llRot2Axis]]|}} | |||
|also_events | |||
|also_articles | |||
|also | |||
|notes | |||
|cat1=Math/3D | |||
|cat2=Rotation | |||
|cat3 | |||
|cat4 | |||
|deepnotes=<source lang="lsl2">rotation llAxisAngle2Rot( vector axis, float angle ) | |||
{ | |||
axis = llVecNorm( axis ) * llSin( angle/2 ); | |||
return <axis.x, axis.y, axis.z, llCos( angle/2 )>; | |||
}</source> | |||
}} | |||
Latest revision as of 22:40, 21 January 2015
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Summary
Function: rotation llAxisAngle2Rot( vector axis, float angle );| 0.0 | Forced Delay |
| 10.0 | Energy |
Returns a rotation that is a generated angle about axis
| • vector | axis | |||
| • float | angle | – | expressed in radians. |
axis need not be normalized, only the direction is important.
angle need to be between the value 0<angle<PI (higher values than PI lead to 2*PI-angle) , because a rotation is not really a rotation (it is more of a rigid motion/mirroring) ,the final destination is the rotation. (in other words: it doesn't matter wether you rotate left by 90 degrees or right by 270 degrees it will return the same rotation)
Examples
default
{
state_entry()
{
vector axis = <0.0, 0.0, 1.0>;
float angle = 90.0 * DEG_TO_RAD;
rotation rot = llAxisAngle2Rot(axis, angle);
vector euler = llRot2Euler(rot) * RAD_TO_DEG;
llOwnerSay((string) euler);
//Says <0.0, 0.0, 90.0> since it is rotating 90 degrees on the Z axis caused by the 1.0 placed in the Z vector spot.
}
}
See Also
Functions
| • | llRot2Angle | |||
| • | llRot2Axis |
Deep Notes
rotation llAxisAngle2Rot( vector axis, float angle )
{
axis = llVecNorm( axis ) * llSin( angle/2 );
return <axis.x, axis.y, axis.z, llCos( angle/2 )>;
}
Signature |
|---|
function rotation llAxisAngle2Rot( vector axis, float angle ); |