Difference between revisions of "LlRotLookAt"
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|p3_type=float|p3_name=damping | |p3_type=float|p3_name=damping | ||
|func_footnote=To change the position in the same manner use {{LSLG|llMoveToTarget}}. For physical objects a range between .2 and 1 is good for both parameters. | |func_footnote=To change the position in the same manner use {{LSLG|llMoveToTarget}}. For physical objects a range between .2 and 1 is good for both parameters. | ||
|func_desc=Cause object to | |func_desc=Cause object to smoothly rotate to '''target''' with '''strength''' resistance at '''damping''' force. | ||
Continues to face '''target''' untill stopped with {{LSLG|llStopLookAt}}. | Continues to face '''target''' untill stopped with {{LSLG|llStopLookAt}}. | ||
|return_text | |return_text | ||
|spec | |spec | ||
|caveats | |caveats= | ||
* In Non-Physical objects this function operates effectively the same as [[llSetLocalRot]]. | |||
|constants | |constants | ||
|examples | |examples | ||
|helpers | |helpers= | ||
* If you want a (mostly) smooth constant rate of motion in a non-physical object try this instead | |||
<lsl> | |||
//-- Rotates Object to vRotTarget at vFltRate (in radians per second | |||
//-- vFltRate < ~0.00000003rad/sec, (~0.00002deg/sec) will result in errors (and is just too slow anyway) | |||
//-- vFltRate >= (PI * 5.0)rad/sec, (900deg/sec) will result in a single snap move to vRotTarget | |||
uSteppedRotLookAt( rotation vRotTarget, float vFltRate){ | |||
if ((integer)(vFltRate = (llAngleBetween( llGetLocalRot(), vRotTarget ) / (vFltRate / 5.0)))){ | |||
rotation vRotStep = llAxisAngle2Rot( llRot2Axis( vRotTarget / llGetLocalRot() ), | |||
(1.0 / vFltRate) * llRot2Angle( vRotTarget / llGetLocalRot() ) ); | |||
vFltRate = (integer)vFltRate; | |||
do{ | |||
llSetLocalRot( vRotStep * llGetLocalRot() ); | |||
}while( --vFltRate ); | |||
} | |||
llSetLocalRot( vRotTarget ); | |||
} //-- for fixed time on any rotation try llKeyframeMotion | |||
</lsl> | |||
|also_functions= | |also_functions= | ||
{{LSL DefineRow||[[llLookAt]]}} | {{LSL DefineRow||[[llLookAt]]}} | ||
Revision as of 04:32, 7 October 2011
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Summary
Function: llRotLookAt( rotation target, float strength, float damping );| 127 | Function ID |
| 0.0 | Forced Delay |
| 10.0 | Energy |
Cause object to smoothly rotate to target with strength resistance at damping force.
Continues to face target untill stopped with llStopLookAt.
| • rotation | target | |||
| • float | strength | |||
| • float | damping | – | seconds to critically damp in |
To change the position in the same manner use llMoveToTarget. For physical objects a range between .2 and 1 is good for both parameters.
Caveats
- In Non-Physical objects this function operates effectively the same as llSetLocalRot.
Examples
Useful Snippets
- If you want a (mostly) smooth constant rate of motion in a non-physical object try this instead
<lsl> //-- Rotates Object to vRotTarget at vFltRate (in radians per second //-- vFltRate < ~0.00000003rad/sec, (~0.00002deg/sec) will result in errors (and is just too slow anyway) //-- vFltRate >= (PI * 5.0)rad/sec, (900deg/sec) will result in a single snap move to vRotTarget uSteppedRotLookAt( rotation vRotTarget, float vFltRate){ if ((integer)(vFltRate = (llAngleBetween( llGetLocalRot(), vRotTarget ) / (vFltRate / 5.0)))){ rotation vRotStep = llAxisAngle2Rot( llRot2Axis( vRotTarget / llGetLocalRot() ), (1.0 / vFltRate) * llRot2Angle( vRotTarget / llGetLocalRot() ) ); vFltRate = (integer)vFltRate; do{ llSetLocalRot( vRotStep * llGetLocalRot() ); }while( --vFltRate ); } llSetLocalRot( vRotTarget ); } //-- for fixed time on any rotation try llKeyframeMotion </lsl>
Notes
- For physical objects, damping seems to be limited at 1.0; setting it to greater value has the same effect as if it was 1. Tested 21 October 2010 on server version 10.10.18.212360.
See Also
Functions
| • | llLookAt | |||
| • | llStopLookAt |
Deep Notes
All Issues
~ Search JIRA for related Issues
|
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SVC-1903 | A | llRotLookAt & llLookAt do not update the object's bounding box |
Signature |
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function void llRotLookAt( rotation target, float strength, float damping ); |