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_footnote=Can be useful to identify the orientation of the local frontal-plane (coronal-plane) of the prim, since it's x-axis is always perpendicular to this local frontal plane.
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|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 (front-direction of prim) relative to earth (global coordinate system).
+
 
|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
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|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=*{{LSLG|llRot2Left}}
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|also_functions=
*{{LSLG|llRot2Up}}
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{{LSL DefineRow||[[llRot2Left]]}}
*{{LSLG|llRot2Axis}}
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{{LSL DefineRow||[[llRot2Up]]}}
*{{LSLG|llRot2Angle}}
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{{LSL DefineRow||[[llRot2Axis]]}}
 +
{{LSL DefineRow||[[llRot2Angle]]}}
 
|also_tests
 
|also_tests
 
|also_events
 
|also_events
 
|also_articles
 
|also_articles
 
|notes
 
|notes
|permission
 
|inventory
 
|negative_index
 
 
|cat1=Rotation
 
|cat1=Rotation
 
|cat2
 
|cat2

Revision as of 20:33, 1 June 2008

Summary

Function: vector llRot2Fwd( rotation q );

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

Search JIRA for related Issues

Signature

function vector llRot2Fwd( rotation q );