[Closed] MapChannel value copy

Nov 10, 2006 12:29 am

hi,
never used maxscript before but have good grasp on programming,
what I’m trying to do is write a quick script that copies a specific MapChannel value (R, G or B) into another Channel (it’s R G or B)

I’ve found plenty of ChannelCopy scripts around, but they all copy the entire Channel RGB/UVW, I just want particular values copied – reason being is that a game side shader uses the U V and W as seperate blenders in a shader, so they are essentially unique vales I’m trying to deal with. So copying U to U, or U to W for example.

So, any help here would be great!

Cheers

1 Reply

arketip

Nov 10, 2006 12:29 am

Do you want just to copy U to W (for example) on the same object and the same channel ?
If that is all you need, this code should work:

fn partialChannelCopy objUnwrapMod theChannel sourcePChannel destPChannel =
	(
	local objUnwrap1=objUnwrapMod.unwrap
	local objUnwrap2=objUnwrapMod.unwrap2
	if objUnwrap1.getMapChannel() != theChannel do (
		objUnwrap1.setMapChannel theChannel
		modPanel.setCurrentObject objUnwrapMod -- update
		)
	local objNumMapverts = objUnwrap1.NumberVertices()
	local objFaces=#{1..objUnwrap1.numberPolygons()}
	local objUnwrap1numberPointsInFace = objUnwrap1.numberPointsInFace
	local objUnwrap1getVertexIndexFromFace = objUnwrap1.getVertexIndexFromFace
	local objUnwrap1getVertexPosition = objUnwrap1.getVertexPosition
	local objUnwrap1SetVertexPosition = objUnwrap1.SetVertexPosition
	local mapVertsFlag=#{}
	local thisFace
	for thisFace in objFaces do (
		local numPoints=objUnwrap1numberPointsInFace thisFace
		local currentFaceVertex
		for currentFaceVertex=1 to numPoints do (
			local currentMapVert = objUnwrap1getVertexIndexFromFace thisFace currentFaceVertex
			if not mapVertsFlag[currentMapVert] do (
				local pos=objUnwrap1getVertexPosition 0f currentMapVert
				local currentValue
				case sourcePChannel of
					(
					1: currentValue=pos.x
					2: currentValue=pos.y
					3: currentValue=pos.z
					)
				case destPChannel of
					(
					1: pos.x=currentValue
					2: pos.y=currentValue
					3: pos.z=currentValue
					)
				objUnwrap1SetVertexPosition 0f currentMapVert pos
				)
			mapVertsFlag[currentMapVert]=true
			)
		)
	objUnwrap2.selectFaces #{}
	)--fn

if selection.count==1 do (
	max modify mode
	local obj=selection[1]
	select obj
	if classof obj.modifiers[1]==Unwrap_UVW
		then (
			local objUnwrapMod=obj.modifiers[1]
			local theChannel=1
			partialChannelCopy objUnwrapMod theChannel 1 3 -- from U to W (1 to 3)
			)
		else messageBox("no unwrap found")	
	)