I’m trying to make a script to copy/paste lights into unreal engine 5.11+
The problem is the rotations, I can’t get it to work, once pasted into unreal the rotation is all wrong for some lights but it’s fine for others.
I was trying to follow the code on the datasmith c++ code but its still not working
(
_LightSpot_strStart =
"Begin Map
Begin Level
"
_LightSpot_end =
"End Level
Begin Surface
End Surface
End Map
"
_LightSpot_str =
"Begin Actor Class=/Script/Engine.SpotLight Name=%
Archetype=/Script/Engine.SpotLight'/Script/Engine.Default__SpotLight'
Begin Object Class=/Script/Engine.ArrowComponent Name=\"ArrowComponent0\"
Archetype=/Script/Engine.ArrowComponent'Default__SpotLight:ArrowComponent0'
End Object
Begin Object Class=SpotLightComponent Name=\"LightComponent0\"
Archetype=SpotLightComponent'Default__SpotLight:LightComponent0'
End Object
Begin Object Name=\"ArrowComponent0\"
AttachParent=LightComponent0
End Object
Begin Object Name=\"LightComponent0\"
SourceRadius=2.0
IntensityUnits=Lumens
bUseTemperature=True
IESBrightnessScale=0.100000
LightGuid=D40F03274E2FB63E3A1BBA9C54B5D3C3
IndirectLightingIntensity=3.000000
bPrecomputedLightingIsValid=False
RelativeLocation=(X=%,Y=%,Z=%)
RelativeRotation=(Pitch=%,Yaw=%,Roll=%)
Mobility=Movable
End Object
SpotLightComponent=LightComponent0
ArrowComponent=ArrowComponent0
LightComponent=LightComponent0
RootComponent=LightComponent0
ActorLabel=\"%\"
End Actor
"
fn copyLightToClipboard theLights =
(
strFile = stringstream ""
format _LightSpot_strStart to:strFile
for c = 1 to theLights.count do
(
_Name = theLights[c].name
_expScale = 2.54
_Pos = theLights[c].pos * _expScale
quatRot = theLights[c].transform.rotationpart as quat
quatRot.y = quatRot.y * -1
quatRot = quatRot * (quat 90 0 -90 1)
theRotation = quatToEuler2 quatRot
x = theRotation.y
y = theRotation.z
z = theRotation.x
theRotation.x = x
theRotation.y = y
theRotation.z = z
format _LightSpot_str _Name _Pos.x (_Pos.y*-1) _Pos.z theRotation.x theRotation.y theRotation.z _Name to:strFile
)
format _LightSpot_end to:strFile
setClipBoardText strFile
free strFile
)
theLights = selection as array
copyLightToClipboard theLights
)
Any suggestions are appreciated.
Guillermo
you should reset the scale in max , UE won’t get the negative scale
or you should set info as metadata ， and set in UE
Thanks for the replay, but I’m must be doing something else wrong as its not the scale.
while scale was reset from -1 to 1 ， the rotation flipped
Just got back to this issue. And I still can’t get it working
It seems the problem are lights that have been mirrored in max, even do they don’t show anything wrong transform dialog or pivot but when exported they are flipped
Can you further explain what can be done to get the correct information into unreal ?
below is part of our pre2UE script , it could emend the vraylight which is plane type , when done , the light will same as max in UE (vraylight use datasmith to export and import)
l is vraylight object
s=l.transform.controller.scale
if l.type == 0 do
(
if s.z < 0 do
in coordsys local
rotate l (EulerAngles 0 180 0)
l.transform.controller.scale = [1,1,1]
)
l.size0 *=abs s.x
if l.type == 0 do
l.size1 *= abs s.yAppreciate the code sample.
Thanks,