Difference between revisions of "LlRot2Fwd"
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|func=llRot2Fwd|sort=Rot2Fwd | |func=llRot2Fwd|sort=Rot2Fwd | ||
|return_type=vector|p1_type=rotation|p1_name=q | |return_type=vector|p1_type=rotation|p1_name=q | ||
|func_desc=Computes the orientation of the {{HoverText|local x-axis|front-direction of prim}} relative to {{HoverLink|Viewer_coordinate_frames#Global|global coordinate system|the earth}}. | |||
|func_desc=Computes the orientation of the local x-axis | |||
|return_text=that is the forward vector defined by '''q''', i.e. a unit vector pointing in the local positive X direction. | |return_text=that is the forward vector defined by '''q''', i.e. a unit vector pointing in the local positive X direction. | ||
|spec | |func_footnote=Can be useful to identify the orientation of the local {{HoverText|frontal-plane|coronal-plane}} of the prim, since it's x-axis is always perpendicular to this local frontal plane. | ||
|spec=Mathematically equivalent to: | |||
<lsl>ret = llVecNorm(<1., 0., 0.> * q);</lsl> | |||
If '''q''' is known to be a unit quaternion then it can be simplified as: | |||
<lsl>ret = <1., 0., 0.> * q;</lsl> | |||
|caveats | |caveats | ||
|constants | |constants | ||
|examples | |examples | ||
|helpers | |helpers | ||
|also_functions= | |also_functions= | ||
{{LSL DefineRow||[[llRot2Left]]}} | |||
{{LSL DefineRow||[[llRot2Up]]}} | |||
{{LSL DefineRow||[[llRot2Axis]]}} | |||
{{LSL DefineRow||[[llRot2Angle]]}} | |||
|also_tests | |also_tests | ||
|also_events | |also_events | ||
|also_articles | |also_articles | ||
|notes | |notes | ||
|cat1=Rotation | |cat1=Rotation | ||
|cat2 | |cat2 | ||
Revision as of 19:33, 1 June 2008
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Summary
Function: vector llRot2Fwd( rotation q );| 0.0 | Forced Delay |
| 10.0 | Energy |
Computes the orientation of the local x-axis relative to the earth.
Returns a vector that is the forward vector defined by q, i.e. a unit vector pointing in the local positive X direction.
| • rotation | q |
Can be useful to identify the orientation of the local frontal-plane of the prim, since it's x-axis is always perpendicular to this local frontal plane.
Specification
Mathematically equivalent to: <lsl>ret = llVecNorm(<1., 0., 0.> * q);</lsl> If q is known to be a unit quaternion then it can be simplified as: <lsl>ret = <1., 0., 0.> * q;</lsl>
Examples
See Also
Functions
| • | llRot2Left | |||
| • | llRot2Up | |||
| • | llRot2Axis | |||
| • | llRot2Angle |
Deep Notes
Signature |
|---|
function vector llRot2Fwd( rotation q ); |