Difference between revisions of "LlAxisAngle2Rot"
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|p2_type=float|p2_name=angle|p2_desc=expressed in radians. | |p2_type=float|p2_name=angle|p2_desc=expressed in radians. | ||
|return_text=that is a generated '''angle''' about '''axis''' | |return_text=that is a generated '''angle''' about '''axis''' | ||
| | |||
|func_footnote='''axis''' need not be [[llVecNorm|normalized]], only the direction is important. | |func_footnote='''axis''' need not be [[llVecNorm|normalized]], only the direction is important. | ||
| | |||
|func_footnote='''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) | |func_footnote='''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) | ,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) | ||
Revision as of 22:17, 15 February 2014
| LSL Portal | Functions | Events | Types | Operators | Constants | Flow Control | Script Library | Categorized Library | Tutorials |
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. |
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)
Examples
<lsl>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.
}
}</lsl>
See Also
Functions
| • | llRot2Angle | |||
| • | llRot2Axis |
Deep Notes
<lsl>rotation llAxisAngle2Rot( vector axis, float angle ) {
axis = llVecNorm( axis ) * llSin( angle/2 ); return <axis.x, axis.y, axis.z, llCos( angle/2 )>;
}</lsl>
Signature |
|---|
function rotation llAxisAngle2Rot( vector axis, float angle ); |