Lineofsight3d help

Not sure but doubt animated models will work as the function relies on the mesh geom being pickable.

This slight modification will work with non-pickable meshes but is not as accurate as you can see ...

Function LineOfSight3D(observer,target,viewrange#=10.0,viewangle# = 90.0)

	;distance between observer and target
	Local dist# = EntityDistance(observer,target)

	;check if the target is within viewrange 
	If dist<=viewrange
		
		;observer vector
		TFormVector 0,0,1,observer,0
		Local ox# = TFormedX()
		Local oy# = TFormedY()
		Local oz# = TFormedZ()
	
		;pick vector
		Local dx# = (EntityX(target,True)-EntityX(observer,True))/dist#
		Local dy# = (EntityY(target,True)-EntityY(observer,True))/dist#
		Local dz# = (EntityZ(target,True)-EntityZ(observer,True))/dist#

		;dot product
		Local dot# = ox*dx + oy*dy + oz*dz

		;check if the target is within the viewangle
		If dot => Cos(viewangle/2.0)
			; check if something is blocking the view
			Picked = LinePick(EntityX(observer,True),EntityY(observer,True),EntityZ(observer,True),dx*dist,dy*dist,dz*distance,0.01)
			If PickedTime() < 1.0
				Return True
			EndIf
			
		;	If LinePick(EntityX(observer,True),EntityY(observer,True),EntityZ(observer,True),dx*viewrange,dy*viewrange,dz*viewrange,0.01)=target
		;		; observer can see target
		;		Return True
		;	End If
		End If
		
	End If

	; observer cannot see target	
	Return False

End Function

An alterative would be to create a cube or sphere, scale it for an approximate fit to your mesh , set entityalpha to 0, set pickmode to 2 and parent your animated mesh to this cube.

Stevie