Difference between revisions of "LlAxisAngle2Rot"
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Rob Niosaki (talk | contribs) |
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|spec | |spec | ||
|caveats | |caveats | ||
|examples=< | |examples=<source lang="lsl2">default | ||
{ | { | ||
state_entry() | state_entry() | ||
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//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. | //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 | |helpers | ||
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|cat3 | |cat3 | ||
|cat4 | |cat4 | ||
|deepnotes=< | |deepnotes=<source lang="lsl2">rotation llAxisAngle2Rot( vector axis, float angle ) | ||
{ | { | ||
axis = llVecNorm( axis ) * llSin( angle/2 ); | axis = llVecNorm( axis ) * llSin( angle/2 ); | ||
return <axis.x, axis.y, axis.z, llCos( angle/2 )>; | return <axis.x, axis.y, axis.z, llCos( angle/2 )>; | ||
}</ | }</source> | ||
}} | }} | ||
Latest revision as of 23:40, 21 January 2015
| LSL Portal | Functions | Events | Types | Operators | Constants | Flow Control | Script Library | Categorized Library | Tutorials |
Summary
Function: rotation llAxisAngle2Rot( vector axis, float angle );| 169 | Function ID |
| 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)
Caveats
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 )>;
}
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Signature |
|---|
function rotation llAxisAngle2Rot( vector axis, float angle ); |