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Spatial functions and snippets: Difference between revisions
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* fAngleX/Y/Z define the angles for the rotation around the origin. | * fAngleX/Y/Z define the angles for the rotation around the origin. | ||
== Function to find angles from one reference to another (ie angles to face) == | |||
<syntaxhighlight lang="papyrus">;Skyrim uses right hand coordinate system (X=Eastings, Y=Northings - and up!) | |||
;Skyrim uses left handed XYZ global angles | |||
;Skyrim undergoes ZYX angle calculations (ie in that order) | |||
;Roll not supported! | |||
;Assumes mesh in nif is 'facing' the 'Y' axis | |||
float[] function getAnglesToFaceRef(ObjectReference origin, ObjectReference target) | |||
float deltaX=target.GetPositionX()-origin.GetPositionX() | |||
float deltaY=target.GetPositionY()-origin.GetPositionY() | |||
float deltaZ=target.GetPositionZ()-origin.GetPositionZ() | |||
float localAngleX=atan2(-deltaZ, math.sqrt((deltaX*deltaX)+(deltaY*deltaY))) ; pitch | |||
float localAngleY=0 ; roll - keeping this as zero, other values will break this | |||
float localAngleZ=RPDefault_Math.atan2(deltaX, deltaY) ; yaw | |||
float globalAngleX=localAngleX*Math.Cos(localAngleZ)+localAngleY*Math.Sin(localAngleZ) | |||
float globalAngleY=localAngleY*Math.Cos(localAngleZ)-localAngleX*Math.Sin(localAngleZ) | |||
float globalAngleZ=localAngleZ ; same as local | |||
float[] toReturn=new float[3] | |||
toReturn[0]=globalAngleX | |||
toReturn[1]=globalAngleY | |||
toReturn[2]=globalAngleZ | |||
endfunction | |||
</syntaxhighlight> | |||
== See also == | == See also == | ||
*[[Unit|Spatial units]] | *[[Unit|Spatial units]] | ||
[[Category:Papyrus Tutorials]] | [[Category:Papyrus Tutorials]] | ||