gtav-src/tools_ng/wildwest/script/3dsMax/Maps/HeightMapMesher.ms

g__DEBUG__ = false

filein (RsConfigGetWildWestDir() + "script/3dsMax/_config_files/Wildwest_header.ms")
rsta_loadCommonFunction #("FN_RSTA_userSettings", "FN_RSTA_rageMat", "FN_Geometry")
filein (RsConfigGetToolsDir() + "wildwest/script/3dsMax/Maps/Materials/rsta_mapIdStruct.ms")
filein (RsConfigGetToolsDir() + "wildwest/script/3dsmax/maps/ultimateterrainmapper.ms")


-- Set default vert/face-count limits, if they're not available from labelled tool-scripts yet:
if (RsMaxCollVerts == undefined) do 
(
	global RsMaxCollVerts = 32768
	global RsMaxCollFaces = 100000
)

struct TileData
(
	position = [0,0],
	containerName = "",
	containerPath = "",
	meshes = #(),		--Datapair mesh: LOD:
	colMeshes = #(),	--DataPair drawMesh: LOD: ?
	textures = #(), 	--DataPair path:x:/blah/someting.bmp type:diffuse
	
	
	fn getRenderMesh LODName =
	(
		if (this.meshes.count == 0) then
		(
			return undefined
		)
		else	--find the level we after
		(
			local LODMesh = #NOTFOUND
			for item in this.meshes where (item.LOD == LODName) do
			(
				LODMesh = item.mesh
			)
			
			return LODMesh
		)
	),
	
	
	fn setRenderMesh LODName newMesh =
	(
		if (this.meshes.count == 0) then
		(
			return false
		)
		else
		(
			for item in this.meshes where (item.LOD == LODName) do
			(
				item.mesh = newMesh
				return true
			)
		)
	),
	
	fn deleteMeshes =
	(
		for item in this.meshes do
		(
			delete item.mesh
		)
		
		this.meshes = #()
	)
)


struct ContainerGridSetup
(
	--areaColourMap = Dictionary(),
	areas,
	areaDict = Dictionary(),
	
	areaGrids = Dictionary(),
	colourNames = Dictionary(),

	alphaGrid,
	
	layoutImage,
	
	--gridCorner = [-4096, -4096],			old
	--gridCorner = [-2446.085, -4046.253],
	gridCorner,
	tileSize = 512.0,
	mapTileOffset = [0,0],
					
	utm = undefined,
	
					
	/***
					
	***/
	fn init_ColourNames =
	(
		for item in areas do
		(
			local areaColour = (color item.Colour.R item.Colour.G item.Colour.B)
			
			colourNames.addKey areaColour item.Name
		)
	),
	
	
	/***
		tilePos is 0-based
	***/
	fn getContainerWSPos tilePos =
	(
		gridCorner + ((tilePos - 1) * tileSize) + (tileSize / 2.0)
	),
		
	
	fn makeBoxContainer mapArea pos contName filePath =
	(
		local offsetPos = getContainerWSPos pos
		local offsetPos3 = [offsetPos.x, offsetPos.y, 0]
		local bareBox = box name:contName pos:offsetPos3 --wirecolor:(areaColourMap.getValue mapArea)
		convertToPoly bareBox
		
		--add a basic rage material
		rageMat = Rage_Shader()
		RstSetShaderName rageMat "default.sps"
		
		barebox.material = rageMat
		
		--setAttrs
		local TXDIdx = getattrIndex "Gta Object" "TXD"
		setAttr barebox TXDIdx contName
		
		local mapContainer = Container()
		mapContainer.name = contName
		mapContainer.pos = offsetPos3
		mapContainer.allowInPlaceEditing = true
		mapContainer.localDefinitionFilename = filePath
		mapContainer.displaylabel = true
		
		mapContainer.AddNodeToContent bareBox
		mapContainer.UnloadContainer()
		local success = mapContainer.SaveContainer false
		
		--return
		mapContainer
	),
	
	
	fn getContainerDefsFromBitmap =
	(
		for l=0 to (layoutImage.height - 1) do
		(
			local y = (layoutImage.height - l)
			
			local pxLine = getPixels layoutImage [0, y] layoutImage.width
			for px=1 to pxLine.count do
			(
				for item in areas do
				(
					local areaColour = (color item.Colour.R item.Colour.G item.Colour.B)
					
					if (pxLine[px] == areaColour) then
					(
						if (areaGrids.hasKey item.Name) then	--exists so add to values
						(
							local vals = areaGrids.getValue item.Name
							append vals [px, l]
							areaGrids.setValue item.Name vals
						)
						else
						(
							areaGrids.addKey item.Name #([px, l])
						)
					)
				)
			)
		)
	),
	
	
	/***
		Take a texture tile generated by world machine and return a container name
	***/
	fn resolveContainerTileFromWorldMachineTile wmName =
	(
		local regex = dotnetclass "System.Text.RegularExpressions.Regex"
		local re_IgnoreCase = (dotNetClass "System.Text.RegularExpressions.RegexOptions").IgnoreCase
		local xString = regex.match wmName "_x([0-9]+)" re_IgnoreCase
		local xCoord = xString.groups.item[1].value as Float
		local yString = regex.match wmName "_y([0-9]+)" re_IgnoreCase
		local yCoord = yString.groups.item[1].value as Float
		
		--coords are 0-based, so add 1
		local newCoords = [(xCoord + 1), (yCoord + 1)]
		
		local geoLoc = this.resolveCoordsToGeoLocation newCoords
		
	),
	
	
	/***
		Convert wm tile textures to container versions
	***/
	fn worldMachineTileConversion sourceDir targetDir prefix:"" suffix:"" srcExtension:"" targetExtension:"" mode:#copy =
	(
		--get tif files from the sourceDir
		local srcFiles = getFiles (sourceDir + srcExtension)
		
		--copy to the targetDir
		if (srcFiles.count != 0) then
		(
			for file in srcFiles do
			(
				local newTileName = resolveContainerTileFromWorldMachineTile (getFilenameFile file)
				local targetFilePath = targetDir + prefix + newTileName + suffix + targetExtension
				print targetFilePath
				
				if (doesFileExist targetFilePath) then
				(
					gRsPerforce.add_or_edit targetFilePath
					try
					(
						copyFile file targetFilePath
					)
					catch
					(
						print "Problem copying file"
					)
				)
				else
				(
					try
					(
						gRsPerforce.add_or_edit #(targetFilePath)
						copyFile file targetFilePath
					)
					catch
					(
						print "Problem copying file"
					)
				)
			)
		)
	),
	
	
	/***
		pixel coords start form 0,0 so coords - 1 for getPixel
	***/
	fn resolveCoordsToGeoLocation coords =
	(
		if (colourNames.keys()).count == 0 then
		(
			init_ColourNames()
		)
		
		--correct for map offset
		coords += this.mapTileOffset
		format "Coords: % \n" coords
		
		--get colour from bitmap
		local px = (getPixels layoutImage [(coords.x - 1), (layoutImage.height - 1 - (coords.y - 1))] 1)[1]
			--print px
		local geoAreaName = undefined
		local xCoord = alphaGrid[coords.x]
		local yCoord = (coords.y as Integer) as String
		

		local areaName = colourNames.getValue px
		
		local areaObj = areaDict.getValue areaName
		local areaNamePrefix = areaObj.ContainerPrefix
			
		geoAreaName = areaNamePrefix + xCoord + "_" + yCoord
		
		--return area and coords
		return (toUpper geoAreaName)
	),
	
	
	/***
		Take a location in the form of a  column:<string> row:<int> and return the tile coords
		return a Point2
	***/
	fn resolveGeoLocationToCoords column row =
	(
		columnIdx = findItem alphaGrid (toUpper column)
		
		--return
		[columnIdx, row]
	),
	
	
	fn makeContainerName _area _pos =
	(
		local areaObj = areaDict.getValue _area
		local areaPrefix = areaObj.ContainerPrefix
		local retName = areaPrefix
		
		local yName = if _pos.y < 10 then "0" + ((_pos.y as Integer) as String) else ((_pos.y as Integer) as String)
		retName += alphaGrid[_pos.x] + "_" + yName
						
		retName
	),
	
	
	fn renameTileToArea inName =
	(
		local inNameBits = filterString inName "_"
		local coordsFromName = [(inNameBits[2] as Integer), (inNameBits[3] as Integer)]
		
		local geoLocName = resolveCoordsToGeoLocation coordsFromName
		
		print geoLocName
	),
	
	
	fn makeFilePathName area name =
	(
		area = trimleft area "_"
		local areaObj = areaDict.getValue area
		pathRoot = RsConfigGetArtDir() + "models/" + areaObj.ContainerFolderName + "/"
		
		pathRoot += name + ".maxc"
	),
	
	
	fn getContainerPath containerName =
	(
		local nameBits = filterString containerName "_"
		local areaPrefix = tolower nameBits[1]
		
		local newPath = ""
		
		for item in areas where ((trimright item.ContainerPrefix "_") == nameBits[1]) do
		(
			newPath = makeFilePathName item.ContainerFolderName containerName
		)
		
		newPath
	),
	
	
	fn createContainers mapArea: =
	(
		print "Creating containers yo"
		
		local tilePositions = #()
		
		if (mapArea == unsupplied) then	--do them all
		(
			for area in (areaGrids.keys()) do
			(
				local areaPositions = areaGrids.getValue area
				join tilePositions areaPositions
				
				for pos in (areaGrids.getValue area) do
				(
					if (pos.x > mapTileOffset.x) and (pos.x < (layoutImage.width - mapTileOffset.x)) and
						(pos.y > mapTileOffset.y) and (pos.y < (layoutImage.width - mapTileOffset.y)) then
					(
						local name = makeContainerName area pos
						local filepath = makeFilePathName area name
						print name
						print filepath
						--makeBoxContainer mapArea pos name filepath
					)
				)
			)
		)
		else
		(
			for pos in (areaGrids.getValue mapArea) do
			(
				if (pos.x > mapTileOffset.x) and (pos.x < (layoutImage.width - mapTileOffset.x)) and
						(pos.y > mapTileOffset.y) and (pos.y < (layoutImage.width - mapTileOffset.y)) then
				(
					local name = makeContainerName mapArea pos
					local filepath = makeFilePathName mapArea name
					print name
					print filepath
					--makeBoxContainer mapArea pos name filepath
				)
			)
		)
	),
	
	
	on create do
	(
		
	)
)

/*
struct HeightMapMesher
(

)
*/

--HMDiceAndMesh @"X:\gta5_liberty\art\dev\models\Working_files\Tim Flowers\World Machine Files\Master Outputs for Play area\Mainplay_HM.tif" 16 16

if (HeightMapMesherUI != undefined) do HeightMapMesherUI.dispose()
struct HeightMapMesherUI
(
	-- LOCALS ------------------------------------------------
	verNum = "1.02",
	verName = "Donkey Rhubarb",
	
	MainWindow,
	dataModel,
	UISettings = rsta_userSettings app:"HeightMapMesher",
	settingProps = #("DivisionsX", "DivisionsY", "LODLevel", "HeightMapStrength", "HeightMapPXScale",
					"WorldOriginX", "WorldOriginY",
					"mapOffsetX", "mapOffsetY", "mapOffsetZ",
					"OutputTexturePath", "MaterialIDPath"),
					
	attrExclusions = #(#activegrid, #HeightMapImagePath, #ReferenceImagePath, #maps),
					
	toolSettings,
	containerGridSettings,
	
	versionNum = 1.15,
	versionName = "Withering Slights",
	
	--numBlocksX = 8,
	--numBlocksY = 8,
	
	heightMapPath = "",
	heightMapBitmap = undefined,
	
	diffuseMapPath = "",
	diffuseMapBitmap = undefined,
	
	normalMapPath = "",
	normalMapBitmap = undefined,
	
	--textureOutputPath = "",
	texOverwrite = false,
	materialTexturePath = "",
	
	blockSizeX = undefined,
	blockSizeY = undefined,
	--LODLevel = 1,
	maxLODLevels = 2,
	LODSuffixes = #("_HD", "_LOD", "_LOD", "_LOD", "_LOD", "_LOD"),
	--heightMapPXScale = 3.662,	--1 px == 1m
	--heightMapPXScale = 1.0,	--1 px == 1m
	--heightMapStrength = 1600,
	
	--mapOffset = [0, 0, 0],
	
	blockArray = #(),
	newBlocks = #(),
	
	meshResX, meshResY,
	HMDisplaceWidth, HMDisplaceLength,
	blockSizeX, blockSizeY,
	HMDisplace,
	
	bm, nm,
	bmDirty = true,
	
	normalProxy,
	
	--mapUI
	activeCellList,
	activeCellListIt,
	activeRenderCells = #(),
	selectionPNGPath = (getDir #temp) + "/HeightMapMesherSelection.png",
	cancelOP = false,
	
	applyMaterials = false,
	defaultMaterial = Standardmaterial(),
	
	ContainerStruct,-- = ContainerGridSetup(),
	tileDataDict  = dotNetObject "System.Collections.HashTable",
	tileDataPath = "c:/temp/gta5_liberty_tiles.xml",
	
	globalMultiSub = undefined,
	currentTile,
	
	
	/***
	
	***/
	fn storeUISettings =
	(
		if (dataModel != undefined) then
		(
			for attr in (getPropNames dataModel) where ((findItem attrExclusions attr) == 0) do
			(
				UISettings.setValue (attr as String) (getProperty dataModel attr)
			)
		)
	),
	
	
	/***
	
	***/
	fn restoreUISettings =
	(
		for attr in (getPropNames dataModel) where ((findItem attrExclusions attr) == 0) do
		(
			local val = UISettings.getValue (attr as String)
			if(val != undefined) then
			(
				setProperty dataModel (attr as String) val
			)
		)
	),
	
	
	/***
	
	***/
	fn resetActiveRenderCells =
	(
		activeRenderCells = #()
		activeRenderCells = for i=1 to this.dataModel.DivisionsX collect (for j=1 to this.dataModel.DivisionsY collect false)
	),
	
	
	/***
	
	***/
	fn createDebugPlane =
	(
		
		
		local debugPlane = Plane name:"DebugPlane" typeInLength:4096.5 typeInWidth:4096.5 length:4096.5 width:4096.5 pos:[0,0,0] isSelected:on

		local mat = Standardmaterial()
		mat.diffuseMap = Bitmaptexture fileName:normalMapPath
		debugPlane.material = mat
	),
	
	
	fn getGeoLocationFromTile coords =
	(
		ContainerStruct.resolveCoordsToGeoLocation coords
	),
	
	
	/***
		get a Tile world space position
	***/
	fn getTilePosition x y =
	(
		if (bm == undefined) then
		(
			this.loadTerrainBitmaps()
		)
		local xPos = (dataModel.mapOffsetX - ((bm.width * dataModel.heightMapPXScale) / 2.0)) - (blockSizeX / 2.0)  + (x * blockSizeX)
		local halfImageOffsetY = ((bm.height * dataModel.heightMapPXScale) / 2.0)
		local originY = dataModel.mapOffsetY - halfImageOffsetY
		local invertY = dataModel.DivisionsY - y
		local yPos = originY + (blockSizeY / 2.0)  + (invertY * blockSizeY)
		local zPos = dataModel.mapOffsetZ
		
		--return
		[xPos, yPos, zPos]
	),
	
	
	/***
		Parameters:
			size:	Point2
			LODLevel: integer
	***/
	fn createBaseTile size LODLevel =
	(
		local planeMesh = Plane Length:size.x Width:size.y lengthsegs:1 widthsegs:1 mapCoords:true
		addModifier planeMesh (TurboSmooth())
		
		--select planeMesh
		--max modify mode
		--planeMesh.modifiers[#Subdivide].showAllTriangles = true
		--planeMesh.modifiers[#Subdivide].size = dataModel.heightMapPXScale
		
		local iterationCount = (log meshResX) / (log 2.0) - (LODLevel - 1)
		planeMesh.Modifiers[#TurboSmooth].iterations = iterationCount
			
		--collapseStack planeMesh
		
		--retval
		return planeMesh
	),
	
	
	/***
	
	
	***/
	fn makeBlockXY x y LODLevel suppliedName: =
	(
		--break()
		--plane only goes upto 1000 quads on a side so need subdivide to get to higher levels
		
		--local blockMesh = Plane Length:blockSizeX Width:blockSizeY lengthsegs:meshResY widthSegs:meshResX mapCoords:true
		local blockMesh = createBaseTile [blockSizeX, blockSizeY] LODLevel
		local pos = ContainerStruct.getContainerWSPos [x, y]
		pos = [pos.x, pos.y, dataModel.MapOffsetZ]
		
		blockMesh.pos = pos
		blockMesh.wirecolor = (color (random 0 255) (random 0 255) (random 0 255))
		blockMesh.material = defaultMaterial
		
		local geoLocation = ContainerStruct.resolveCoordsToGeoLocation [x,y]
		
		--name the Plane
		if suppliedName != unsupplied then
		(
			blockMesh.name = suppliedName
		)
		else
		(
			--blockMesh.name = "Tile_" + ((x as Integer) as String) + "_" + ((y as Integer) as String) + this.LODSuffixes[this.LODLevel]
			blockMesh.name = (getGeoLocationFromTile [x, y]) + LODSuffixes[LODLevel]
		)
		
		--connect displace modifier
		bindSpaceWarp blockMesh HMDisplace
		
		print blockMesh.name
		
		--add the block to the array
		--append blockArray (DataPair tilePos:[x, y] mesh:blockMesh)
		--check if the TileData for this location exists already
		local thisLocationTileDataExists = false
		local locationTileData = undefined
		
		for item in blockArray do
		(
			if(item.containerName == geoLocation) then
			(
				thisLocationTileDataExists = true
				locationTileData = item
			)
		)
		
		if not thisLocationTileDataExists then
		(
			append blockArray (TileData position:[x,y] containerName:geoLocation meshes:#((DataPair mesh:blockMesh LOD:LODSuffixes[LODLevel])))
		)
		else
		(
			append locationTileData.meshes (DataPair mesh:blockMesh LOD:LODSuffixes[LODLevel])
		)
	),
	
	
	/***
	
	***/
	fn getNMapPixelFromVertexPos vPos =
	(
		if (nm == undefined) do
		(
			return undefined
		)
		
		local ret = undefined
		--check bounds
		--if vPos.x > HMDisplace.width
		
		--find pixel location
		local dX = abs(((HMDisplaceWidth - 1.0) / 2.0) - vPos.x)
		local dy = abs(((HMDisplaceLength - 1.0) / 2.0) - vPos.y)
		
		local pX = abs((HMDisplaceWidth - 1.0) - ((dx / dataModel.heightMapPXScale) * ((HMDisplaceWidth - 1.0) / nm.width)))
		local pY = (dy / dataModel.heightMapPXScale) * ((HMDisplaceLength - 1.0) / nm.height)
		
		--format "pX: % pY: % \n" pX pY
		
		local colour = (getPixels nm [pX, pY] 1)[1]
		
		--0.00392157 = map colour fomr 0-255 to 0-1
		ret = [(2.0 * (colour.r * 0.00392157) - 1.0), (2.0 * (colour.g * 0.00392157) - 1.0 ), (2.0 * (colour.b * 0.00392157) - 1.0)]
		--print ret
		--ret = [(colour.r * 0.00392157), 0.0, 1.0]
		
		--return
		ret
		
	),
	
	
	/***
		Uses the normal proxy object to sample a normal in the displace space
		to apply to a vertex.
	
		Returns the normal.
	***/
	fn getNormalFromVertexPos vPos =
	(
		--move the normalProxy to the vert pos
		normalProxy.pos = vPos
		
		--local snapmesh = snapshotAsMesh normalProxy
		--get the normal for the centre vert(5)
		norm = getnormal normalProxy 5
		
		--snapmesh = undefined
		
		--return
		norm
	),
	
	
	/***
	
	***/
	fn setBorderNormals blockMesh =
	(
		--get the border edges
		--polyop.getOpenEdges blockMesh
		
		--convert to vertex selection
		local verts = (polyop.getVertsUsingEdge blockMesh (polyop.getOpenEdges blockMesh)) as Array
		local vertPosList = for vtx in verts collect polyop.getVert blockMesh vtx node:blockMesh
		--local verts = #{1..blockMesh.numverts}
		
		local normalMod = Edit_Normals()
		addModifier blockmesh normalMod
		normalMod.MakeExplicit selection:(verts as BitArray)
		
		--max modify mode
		modPanel.setCurrentObject normalMod
		
		--Check for an existing normalProxy, fail if its undefined
		if(normalProxy == undefined) then
		(
			messageBox "Normal Proxy Not created!" title:"Error - Normal Proxy"
			return false
		)
		
		--get the position of each vertex and get the normal from the normalmap
		--local vtxCounter = 0
		--local aggTime = 0
		with undo off
		(
			for vtx=1 to verts.count do
			(
				--if keyboard.escPressed then cancelOP = true
					
				if keyboard.escPressed then
				(
					cancelOP = false
					return false
				)
				else
				(
					--local startTime = timeStamp()
					
					--get position
					local vPos = vertPosList[vtx]
					
					--get the normal
					local normalVec = getNormalFromVertexPos vPos
					
					--local normalVec = [0,0,1]
					
					--set the vertex normal to the normal vec
					local vtxNormals = #{}
					normalMod.ConvertVertexSelection #{verts[vtx]} vtxNormals
					vtxNormals = vtxNormals as array
					
					for idx = 1 to vtxNormals.count do
					(
						normalMod.SetNormalExplicit vtxNormals[idx]
						normalMod.setNormal vtxNormals[idx] normalVec
					)
					
					--aggTime += (timeStamp() - startTime)
				)
				
				/*
				vtxCounter += 1
				
				if vtxCounter == 100 then
				(
					format "100 verts, time per vert: % \n" ((aggTime / 100.0) * 0.001)
					vtxCounter = 0
				)
				*/
					
			)
		)
		
		--collapse it
		collapseStack blockMesh
		
		OK
	),
	
	
	/***
		Set the resolution of the terrain tile to be generated.
	***/
	fn setMeshRes LODLevel =
	(
		if (this.bm != undefined) then
		(
			meshResX = this.bm.width / dataModel.DivisionsX / (2^(dataModel.LODLevel-1))
		
			format "meshResX: %\n" meshResX
			meshResY = this.bm.height / dataModel.DivisionsY / (2^(dataModel.LODLevel-1))
		)
	),
	
	
	/***
		Load the bitmaps from the paths supplied
	***/
	fn loadTerrainBitmaps = 
	(
		if(bm == undefined) or (bmDirty) do
		(
			--local mapImage = dataModel.HeightMapImagePath.AbsolutePath
			this.heightMapPath = dataModel.HeightMapImagePath.AbsolutePath
			this.bm = openBitmap this.heightMapPath
			
			--set vars that depend on bm
			HMDisplaceWidth = (bm.width * dataModel.heightMapPXScale) + dataModel.heightMapPXScale
			HMDisplaceLength = (bm.height * dataModel.heightMapPXScale) + dataModel.heightMapPXScale
			
			blockSizeX = (bm.width * dataModel.heightMapPXScale) / dataModel.DivisionsX
			blockSizeY = (bm.height * dataModel.heightMapPXScale) / dataModel.DivisionsY
		)
	),
	
	
	/***
	 chop up diffuse or normal textures
	texOverwrite is set by the overwrite ui checkbox
	***/
	fn diceTexture type singleTile: overwrite:dataModel.DoOverwriteTextures =
	(
		--local overwrite = false
		
		local baseName = "Tile_"
		local LODName = LODSuffixes[dataModel.LODLevel]
		
		local bmTiles = #()
		
		local fullBM = case type of
		(
			"D":
			(
				diffuseMapBitmap
			)
			
			"N":
			(
				normalMapBitmap
			)
		)
		
		--check we dont have an undefined value for fullBM.
		--abort if we do
		if (fullBM == undefined) then return false
		
		local tilePixelsX = fullBM.width / dataModel.DivisionsX
		local tilePixelsY = fullBM.height / dataModel.DivisionsY
		
		if not (isDirectoryWriteable dataModel.OutputTexturePath) then
		(
			if (querybox "Folder does not exist, create it?") then
			(
				makedir dataModel.OutputTexturePath
			)
		)
		
		--Doing a tile at a time
		if (singleTile != unsupplied) then
		(
			local texturePathExists = #{}
			local counter = 1
			--local outputFileName = (textureOutputPath + "/" + baseName + ((singleTile.x as Integer) as String) + "_" + ((singleTile.y as Integer) as String) + LODName + "_" + type +".bmp")
			local geoLocationName = getGeoLocationFromTile [singleTile.x, singleTile.y]
			local outputFileName = (dataModel.OutputTexturePath + "/" + geoLocationName + LODName + "_" + type +".bmp")
			if (doesFileExist outputFileName) then
			(
				texturePathExists[counter] = true
			)
			
			--if the overwrite checkbox in the ui is not set but we find textures to overwrite anyway then prompt the user to action.
			if (texturePathExists.numberSet > 0) and not overwrite then
			(
				case (yesNoCancelBox ("Some or all " + type + " textures already exist, do you want to overwrite them?")) of
				(
					#yes:
					(
						overwrite = true
					)
					
					#no:
					(
						return false
					)
					
					#cancel:
					(
						return false
					)
				)
			)
			
			--chop out the tile from the main image.
			local tileBM = bitmap tilePixelsX tilePixelsY
			pasteBitmap fullBM tileBM (box2 ((singleTile.x - 1) * tilePixelsX) (fullBM.height - (singleTile.y * tilePixelsY)) tilePixelsX tilePixelsY) [0, 0]
						
			--set the filename
			tileBM.filename = outputFileName
			
			--Take action based on the texture already exists and the overwrite state.
			if texturePathExists[counter] and overwrite then
			(
				try
				(
					deleteFile outputFileName
				)
				catch
				(
					messagebox "There was a problem deleting that file can you try to do it manually?"
					ShellLaunch "Explorer.exe" outputFileName
				)
				
				--save the bitmap
				save tileBM
				free tileBM
			)
			else
			(
				--save the bitmap
				save tileBM
				free tileBM
			)
			counter += 1
		)
		else	--make all the tiles
		(
			--build a file path list to see if they need overwriting
			local texturePathExists = #{}
			local counter = 1
			for x=0 to (this.dataModel.DivisionsX - 1) do
			(
				for y=0 to (this.dataModel.DivisionsY - 1) do
				(
					if (doesFileExist (dataModel.OutputTexturePath + "/" + baseName + (x as String) + "_" + (y as String) + LODName + "_" + type +".bmp")) then
					(
						append texturePathExists counter
					)
					counter += 1
				)
			)
			
			if (texturePathExists.numberSet > 0) and not overwrite then
			(
				case (yesNoCancelBox ("Some or all " + type + " textures already exist, do you want to overwrite them?")) of
				(
					#yes:
					(
						overwrite = true
					)
					
					#no:
					(
						return false
					)
					
					#cancel:
					(
						return false
					)
				)
			)
			
			--create texture tiles
			local counter = 1
			for x=0 to (this.dataModel.DivisionsX - 1) do
			(
				for y=0 to (this.dataModel.DivisionsY - 1) do
				(
					local tileBM = bitmap tilePixelsX tilePixelsY
					pasteBitmap fullBM tileBM (box2 (x * tilePixelsX) (fullBM.height - ((y+1) * tilePixelsY)) tilePixelsX tilePixelsY) [0, 0]
					--tile x+1 y+1 as the image is 0 based but mesh tiles are 1 based
					--append bmTiles (DataPair tile:[(x+1),(y+1)] bitmap:tileBM)
					local outputFileName = (dataModel.OutputTexturePath + "/" + baseName + ((x+1) as String) + "_" + ((y+1) as String) + LODName + "_" + type +".bmp")
					tileBM.filename = outputFileName
					
					
					if texturePathExists[counter] and overwrite then
					(
						try
						(
							deleteFile outputFileName
						)
						catch
						(
							messagebox "There was a problem deleting that file can you try to do it manually?"
							ShellLaunch "Explorer.exe" outputFileName
						)
						
						--save the bitmap
						save tileBM
						free tileBM
					)
					else
					(
						--save the bitmap
						save tileBM
						free tileBM
					)
					counter += 1
				)
			)
		)
		
		true
	),
	
	
	/***
		Create the Displacement SpaceWarp
	***/
	fn createSpaceWarp =
	(
		HMDisplaceWidth = (bm.width * dataModel.heightMapPXScale) + dataModel.heightMapPXScale
		HMDisplaceLength = (bm.height * dataModel.heightMapPXScale) + dataModel.heightMapPXScale
		
		blockSizeX = (bm.width * dataModel.heightMapPXScale) / dataModel.DivisionsX
		blockSizeY = (bm.height * dataModel.heightMapPXScale) / dataModel.DivisionsY
		
		format "HMDisplaceWidth: % HMDisplaceHeight: % \n" HMDisplaceWidth HMDisplaceLength
		HMDisplace = Spacedisplace()
		HMDisplace.bitmap = bm
		HMDisplace.lumCenter = 0.0
		HMDisplace.length = ((HMDisplaceWidth / 2.0) + 1.0)
		HMDisplace.width = ((HMDisplaceLength / 2.0) + 1.0)
		HMDisplace.strength = dataModel.heightMapStrength
		local posX = ContainerStruct.gridCorner.x + (bm.width * dataModel.heightMapPXScale) / 2.0
		local posY = ContainerStruct.gridCorner.y + (bm.height * dataModel.heightMapPXScale) / 2.0
		local posZ = dataModel.mapOffsetZ
		HMDisplace.pos = [posX, posY, posZ]
		--HMDisplace.pos = [(dataModel.mapOffsetX + (HMDisplaceWidth / 2.0)), (dataModel.mapOffsetY + (HMDisplaceLength / 2.0)), dataModel.mapOffsetZ]
	),
	
	
	/***
	
	***/
	fn processSetup =
	(
		free this.blockArray
		
		--load bitmaps
		loadTerrainBitmaps()
		
		
		--set the container struct gridcorner from the world origin + map Offset
		ContainerStruct.gridCorner = [(dataModel.WorldOriginX + dataModel.MapOffsetX), (dataModel.WorldOriginY + dataModel.MapOffsetY)]
		
		--TODO
		--These values need to be 'discovered' rather than hard coded
		--
		--ContainerStruct.tileSize = 512
		--ContainerStruct.mapTileOffset = [4,4]
		
		
		--Set mesh resolution for the desired LOD level
		setMeshRes dataModel.LODLevel
		
		--for each block chop it out of the main image to a new bitmap, but add a border of 1 pixel
		--if one or two sides are on the edge then replicate the border pixels
		
		--create displace spacewarp
		createSpaceWarp()
		
		activeCellListIt = dataModel.ActiveGrid.Keys.GetEnumerator()
		
		/*
		while activeCellListIt.MoveNext() do
		(
			local gridVal = activeCellListIt.Current
			
			--gridVal Y needs flipping due to grid coord system is inverse
			gridVal.Y = dataModel.DivisionsY - gridVal.Y + 1
			format "x:% y:% \n" ((gridVal.X as Integer) as String) ((gridVal.Y as Integer) as String)
			makeBlockXY (gridVal.X as Integer) (gridVal.Y as Integer)
		)
		*/
		
		storeUISettings()
	),
	
	
	/***
	
	***/
	fn processNextTile =
	(
		print "processNextTile"
		
		if (activeCellListIt == undefined) then
		(
			activeCellListIt = dataModel.ActiveGrid.Keys.GetEnumerator()
		)
		
		if activeCellListIt.MoveNext() then
		(
			print "next one"
			local gridVal = activeCellListIt.Current
			
			--gridVal Y needs flipping due to grid coord system is inverse
			gridVal.Y = dataModel.DivisionsY - gridVal.Y + 1
			format "x:% y:% \n" ((gridVal.X as Integer) as String) ((gridVal.Y as Integer) as String)
			if dataModel.DoHD then
			(
				makeBlockXY (gridVal.X as Integer) (gridVal.Y as Integer) dataModel.LODLevel
			)
			
			--are we doing a LOD as well
			if dataModel.DoLODs then
			(
				makeBlockXY (gridVal.X as Integer) (gridVal.Y as Integer) dataModel.SubLODLevel
			)
			
			return true
		)
		else	--reached the end, reset the activeCellListIt
		(
			print "all done"
			--activeCellListIt = undefined
			
			return false
		)
		
	),
	
	
	/***
	
	***/
	fn HMDiceAndMesh =
	(
		processSetup()
		
		local moreToGo = true
		while moreToGo do
		(
			moreToGo = processNextTile()
		)
	),
	
	
	/***
	
	***/
	fn createCollisionMesh inMesh =
	(
		local givenName = inMesh.name + "_col"
		local outMesh = copy inMesh
		convertToMesh outMesh
		
		local savetrans = outMesh.transform		
		
		newsubmat = RexBoundMtl()
		newsubmat.name = "Default"
		submatlist = #(newsubmat)
		
		newmat = Multimaterial()
		newmat.numsubs = submatlist.count
		newmat.materialList = submatlist
		
		outMesh.material = newmat
		
		--check the count for the mesh.If its bigger than allowed we need to chop it up.
		-- Split up mesh until it has fewer than the max number of verts/faces:
		local NewObjs = #(outMesh)
		local RedoLast = false
		local doSplit = false
		local NewObjNum = 0
		
		while(NewObjNum < NewObjs.count) do
		(
			if not RedoLast then
			(
				NewObjNum += 1
			)
			
			local ThisNewObj = NewObjs[NewObjNum]
			local NumVerts = (GetNumVerts ThisNewObj.Mesh)
			local NumFaces = (GetNumFaces ThisNewObj.Mesh)
			
			local OverVerts = (NumVerts > RsMaxCollVerts)
			local OverFaces = (NumFaces > RsMaxCollFaces)
			doSplit = (OverVerts or OverFaces)
			
			--format "%%: Split:% Verts:(% > % = %) Faces:(% > % = %)\n" ObjPrintTabs ThisNewObj.Name doSplit NumVerts RsMaxCollVerts OverVerts NumFaces RsMaxCollFaces OverFaces
			
			if (doSplit) then
			(
				RsMesh_SplitLongestAxis ThisNewObj &NewObjs selectionMode:true
				RedoLast = true
			)
			else
			(
				RedoLast = false
			)
			
		)
			
		-- Convert newly-split meshes to collision, and apply attributes to each object:
		for NewObj in NewObjs do
		(
			mesh2col NewObj
			NewObj.parent = inMesh
			
		)
		
		--set attrs
		gRsCollTypes.setObjCollTypeFlags NewObjs "Mover|Weapons|Horse|Vehicle|Cover"
		
		--)
		--mesh2col outMesh
		--outMesh.transform = savetrans
		--outMesh.name = givenName
		
		--return
		--outMesh
	),
	
	
	/***
	
	***/
	/*
	fn createMaterial blockName =
	(
		--break()
		local rageMaterial = Rage_Shader()
		
		--assign normal shader
		RstSetShaderName rageMaterial "normal.sps"
		
		--get the textures and assign them to the slots
		--local blockNameBits = filterString blockName "_"
		--"TerrainTile_1_8_SLOD1_Diff.bmp"
		local tileDiffTextureName = blockName + "_D.bmp"
		
		--diffuseMap
		local diffusePath = pathConfig.appendPath materialTexturePath tileDiffTextureName
		
		if not (doesFileExist diffusePath) then
		(
			messagebox "This texture path does not exist" title:"Bad Path"
			return undefined
		)
		else
		(
			RstSetVariable rageMaterial 1 diffusePath
		)
		
		--local  tileNormTextureName = "Norm" + tileName
		local  tileNormTextureName = blockName + "_N.bmp"
		--normalMap
		local normalPath = pathConfig.appendPath materialTexturePath tileNormTextureName
		
		if not (doesFileExist normalPath) then
		(
			messagebox "This texture path does not exist" title:"Bad Path"
			return undefined
		)
		else
		(
			RstSetVariable rageMaterial 9 normalPath
		)
		
		--return the new material
		rageMaterial
	),
	*/
	
	/***
		Set the textures in the relevant slots for the material
		using the textures found in the path set in the UI
	***/
	fn setMaterialTextures theMaterial shaderType =
	(
		--local theMaterial = theMesh.material
		
		--go through the material ID and for each RageMaterial
		--set the diffuse and normal maps for the currentTile
		local tintTexturePathRoot = (dataModel.GetMapDataByName "Tint Map").SourcePath
		local tintTexturePath = RsMakeSafeSlashes(tintTexturePathRoot + "/" + currentTile.containerName + "_T" + dataModel.DefaultTextureExtension )
		
		local tintNormalPathRoot = (dataModel.GetMapDataByName "TintNormal Map").SourcePath
		local tintNormalTexturePath = RsMakeSafeSlashes( tintNormalPathRoot + "/" + currentTile.containerName + "_TN" + dataModel.DefaultTextureExtension )
		
		--set textures dependent on shaderType
		case shaderType of
		(
			#ttn:
			(
				if (isKindOf theMaterial Multimaterial) then
				(
					for subMat in theMaterial.materialList do
					(
						rsta_rageMat.setVarByName subMat "Tint[rgb] + Tint blend[a]" tintTexturePath
						rsta_rageMat.setVarByName subMat "Tint bump" tintNormalTexturePath
					)
				)
				else if (isKindOf theMaterial Rage_Shader) then
				(
					rsta_rageMat.setVarByName theMaterial "Tint[rgb] + Tint blend[a]" tintTexturePath
					rsta_rageMat.setVarByName theMaterial "Tint bump" tintNormalTexturePath
				)
			)
			
		
			#normal:
			(
				if (isKindOf theMaterial Multimaterial) then
				(
					for subMat in theMaterial.materialList do
					(
						rsta_rageMat.setVarByName subMat "Diffuse Texture" tintTexturePath
						rsta_rageMat.setVarByName subMat "Bump Texture" tintNormalTexturePath
					)
				)
				else if (isKindOf theMaterial Rage_Shader) then
				(
					rsta_rageMat.setVarByName theMaterial "Diffuse Texture" tintTexturePath
					rsta_rageMat.setVarByName theMaterial "Bump Texture" tintNormalTexturePath
				)
			)
		)
	),
	
	
	/***
	
	***/
	fn setGtaAttributes inMesh tileData LODLevel =
	(
		--getINISetting toolSettings.GtaAttrsINIPath
		
		local TXDAttrIdx = GetAttrIndex "Gta Object" "TXD"
		local LODDistIdx = GetAttrIndex "Gta Object" "LOD distance"
		
		--set attrs based on mesh lod
		if (LODLevel == #HD) then
		(
			for item in toolSettings.GtaAttrs.HD do
			(
				local attrName = (getpropnames item)[1] as String
				local attrQueryName = substituteString attrName "_" " "
				local attrIdx = GetAttrIndex "Gta Object" attrQueryName
				local attrVal = getproperty item attrName
				setAttr inMesh attrIdx attrVal
			)
			
			--Specials
			--setAttr inMesh LODDistIdx 800
			setAttr inMesh TXDAttrIdx tileData.ContainerName
		)
		else if (LODLevel == #LOD) then
		(
			for item in toolSettings.GtaAttrs.LOD do
			(
				local attrName = (getpropnames item)[1] as String
				local attrQueryName = substituteString attrName "_" " "
				local attrIdx = GetAttrIndex "Gta Object" attrQueryName
				local attrVal = getproperty item attrName
				setAttr inMesh attrIdx attrVal
			)
			
			--Specials
			--setAttr inMesh LODDistIdx 8000
			setAttr inMesh TXDAttrIdx (tileData.ContainerName + "_LOD")
		)
	),
	
	
	/***
		Create a final baked mesh from a passed in processed mesh
	***/
	fn createBakeMesh tile LODName =
	(
		local cname = ContainerStruct.resolveCoordsToGeoLocation tile.position
		local originalMesh = tile.getRenderMesh LODName
		local newMesh = snapshot originalMesh
		convertTo newMesh PolyMeshObject
		
		originalMesh.name += "TRASH"
		newMesh.name = tile.containerName + LODName
		tile.containerPath = ContainerStruct.getContainerPath tile.containerName
		
		setBorderNormals newMesh
		
		CenterPivot newMesh
		ResetXForm newMesh
		
		collapseStack newMesh
		
		--add it to a collection
		--print newMesh
		--tile.meshes[1].mesh = newMesh
		tile.setRenderMesh LODName newMesh
		
		--delete the old one
		delete originalMesh
		
		--return successful?
		newMesh
	),
	
	
	fn objExport theMesh = 
	(
		print(classOf theMesh)
		print "Attempting to export an obj mesh..."
		
		--local exportPath = toolSettings.objExportPath + theMesh.name + ".obj"
		local exportPath = dataModel.OBJOutputPath + "/" + theMesh.name + ".obj"
		--find if there one there already and get the datstamp so we can check if it got overwritten
		local depotPath = gRsPerforce.local2Depot exportPath
		local fStat = gRsPerforce.getFileStats depotPath
		
		if (fStat != undefined) and (fStat.count != 0) then	--it exists already
		(
			gRsPerforce.add_or_edit exportPath
		)
		
		local fileHash = undefined
		if (doesFileExist exportPath) then
		(
			fileHash = getHashValue (getFileModDate exportPath) 1
		)
		
		local objIni = ObjExp.getIniName()
		
		--exportFile <filename_string> [ #noPrompt ] [ selectedOnly:<boolean> ] [ using:<maxclass> ]
		select theMesh
		local result = exportFile exportPath #noPrompt selectedOnly:true using:ObjExp
		
		print result
		
		/*
		if (doesFileExist exportPath) then
		(
			local newFileHash = getHashValue (getFileModDate exportPath) 1
			if (newFileHash != fileHash) then	--it worked
			(
				print "Successful save"
				return true
			)
			else
			(
				print "Fail save"
				return false
			)
		)
		else
		(
			print "Fail save"
			return false	
		)
		 */
		
		result
	),
	
	
	/***
	
	***/
	fn decimateBlock theMesh LODLevel = 
	(
		local optMod = ProOptimizer()
		
		--What settings should we use
		addModifier theMesh optMod
		
		local appliedMod = theMesh.modifiers[#ProOptimizer]
		
		--max modify mode
		--modPanel.setCurrentObject appliedMod
		select theMesh
		
		appliedMod.Calculate = off
		appliedMod.Calculate = on
		--appliedMod.VertexPercent = toolSettings.proOptimizerVertexPercent
		case LODLevel of
		(
			#HD:appliedMod.VertexPercent = dataModel.DecimateHDAmount
			#LOD:appliedMod.VertexPercent = dataModel.DecimateLODAmount
		)
		
		--collapse it?
		format "optimised? % \n" appliedMod.Calculate as String
		if appliedMod.Calculate then collapseStack theMesh
		
		ok
	),
	
	
	/***
	
	***/
	fn gridSlicemesh theMesh =
	(
		/*
		local gridSlice = RsGridSlice()
		gridSlice.loadPresets()
		
		local preset = gridSlice.presets.Item["Bob Terrain"].value
		gridSlice.activePreset = preset
		
		gridSlice.slice theMesh
		
		ok
		*/
	),
	
	
	/***
	
	***/
	fn findCollectionBounds contentNodes =
	(
		local aMinBounds = #()
		local aMaxBounds = #()
		for item in contentNodes do
		(
			local itemBounds = NodeGetBoundingBox item (matrix3 1)
			append aMinBounds itemBounds[1]
			append aMaxBounds itemBounds[2]
		)
		
		local xBoundsMin = for val in aMinBounds collect val.x
		local xBoundsMax = for val in aMaxBounds collect val.x
			
		local yBoundsMin = for val in aMinBounds collect val.y
		local yBoundsMax = for val in aMaxBounds collect val.y
			
		local zBoundsMin = for val in aMinBounds collect val.z
		local zBoundsMax = for val in aMaxBounds collect val.z
			
		local minBounds = [(amin xBoundsMin), (amin yBoundsMin), (amin zBoundsMin)]
		local maxBounds = [(amax xBoundsMax), (amax yBoundsMax), (amax zBoundsMax)]
		
		return #(minBounds, maxBounds)
	),
	
	
	/***
	
	***/
	fn createContainer coords suppliedName: =
	(
		--Create/add - load container to add the tile to
		local containerName = ""
		local tilePos
		if(suppliedName != unsupplied) then
		(
			containerName = suppliedName
			local nameBits = filterString containerName "_"
			local column = nameBits[2]
			local row = nameBits[3]
			tilePos = ContainerStruct.resolveGeoLocationToCoords column row
		)
		else
		(
			containerName = ContainerStruct.resolveCoordsToGeoLocation coords
			tilePos = coords
		)
		
		--what area does this container live
		local localContainerPath = ContainerStruct.getContainerPath containerName
		
		--does it exist in perforce
		local depotPath = gRsPerforce.local2Depot localContainerPath
		local fStat = gRsPerforce.getFileStats depotPath
		
		if (fStat != undefined) and (fStat.count != 0) then	--it exists already
		(
			gRsPerforce.add_or_edit localContainerPath
			
			--open the container
			local containerNode = Containers.CreateInheritedContainer localContainerPath
			
			select containerNode
			
			--edit in place
			actionMan.executeAction -1172021248 "13"
			
			--on create make sure container position matches the block centre position
			--local worldPos = getTilePosition tilePos.x tilePos.y
			local worldPos = ContainerStruct.getContainerWSPos [tilePos.x, tilePos.y]
			
			if(containerNode.pos != worldPos) then	--adjust the position
			(
				print "adjusting position"
				--remove the contained nodes whilst we move the container itself
				local contentNodes = #()
				containerNode.GetContentNodes false &contentNodes
				for item in contentNodes do
				(
					containerNode.RemoveNodeFromContent item true
				)
				
				--re-centrer the containerNode on the contentBounds
				local contentBounds = findCollectionBounds contentNodes
				local boundsCentre = contentBounds[1] + 0.5 * (contentBounds[2]-contentBounds[1])
				
				setTransformLockFlags containerNode #none
				containerNode.pos = boundsCentre
				
				--Re-add the nodes
-- 				for item in contentNodes do
-- 				(
					containerNode.AddNodesToContent contentNodes
-- 				)
				
				--Now set the containerNode to the bounds position
				containerNode.pos = [worldPos.x, worldPos.y, containerNode.pos.z]
				
				setTransformLockFlags containerNode #all
			)
			
			--Prompt Whether to replace  a mesh with the same name exists already in that container
			
			
			--save the container
			actionMan.executeAction -1172021248 "13"
			
			--add it to a container changelist
			
		)
		else	--Create a new one
		(
			--get tileData
			--local data = tileDataDict.Item[containerName].value
			local mapArea = (filterString containerName "_")[1]
			local newContainer = ContainerStruct.makeBoxContainer mapArea tilePos containerName localContainerPath
			gRsPerforce.add_or_edit localContainerPath
			
		)
	),
	
	
	/***
		Get the global multimaterial from a max file object currently
		Until we define it in a better way, depending on how shaders and presets get implemented
	***/
	fn getGlobalMaterial =
	(
		local libertyMm = for item in (getClassInstances MultiMaterial) where (item.name == "Liberty_Master") collect item
		
		if (libertyMm.count == 0) then	--its not loaded
		(
			mergeMaxFile (RsConfigGetArtDir() + toolSettings.globalMultiSubPath) #select
			
			--get the material off it
			globalMultiSub = selection[1].material
		)
		
	),
	
	
	/***
	
	***/
	fn getLODMaterial =
	(
		local mat = Rage_Shader()
		
		--set shader type
		RstSetShaderName mat "normal.sps"
		
		setMaterialTextures mat #normal
		
		mat
	),
	
	
	/***
	
	***/
	fn ultimateMapMesh renderMesh =
	(
		if (utm == undefined) then
		(
			utm = UltimateTerrainMapperStruct()
		)
		
		select renderMesh			
		print selection[1]
		
		local utmsetting = toolSettings.UltimateTerrainMapper
		
		utm.MapObject renderMesh utmsetting.utm_channel1 utmsetting.utm_mapOp1_width utmsetting.utm_mapOp1_length
		utm.MapObject renderMesh utmsetting.utm_channel2 utmsetting.utm_mapOp2_width utmsetting.utm_mapOp2_length
		
		--convertToPoly renderMesh
		
	),
	
	
	/***
		Apply any other mapping required
	***/
	fn applyOtherMapping renderMesh =
	(
		addModifier renderMesh (UVWMap())
		renderMesh.modifiers[#UVWMap].Length = 512.0
		renderMesh.modifiers[#UVWMap].Width = 512.0
		renderMesh.modifiers[#UVWMap].mapChannel = 3
			
		collapseStack renderMesh
			
	),
	
	
	/***
	
	***/
	fn projectMatIds renderMesh tileData =
	(
		--get the texture path for the matId texture
		local matIDRootPath = (dataModel.GetMapDataByName "MatID Map").SourcePath
		local matIDTexturePath = RsMakeSafeSlashes (matIDRootPath + "/" + tileData.containerName + ".tif")
		if not (doesFileExist matIDTexturePath) then --try to sync it
		(
			gRsPerforce.sync #(matIDTexturePath)
			if not (doesFileExist matIDTexturePath) then
			(
				return false
			)
		)
		
		local mID = mapIDProjector()
		mID.project renderMesh matIDTexturePath

		if dataModel.DoMaterialIDBlending then
		(
			if (classOf renderMesh != Editable_Poly) then
			(
				convertToPoly renderMesh
			)
			mID.blendVerts renderMesh #(2,4)
		)

		return true
	),
	
	
	/***
		Mesh chopper
	***/
	fn meshChop obj chopSize:256 namePrefix:"test" =
	(
		if (obj == undefined) then
		(
			return false
		)
		
		local meshBits = #()
		
		ConvertToPoly obj
		
		local chopBitCount = 0
		chopSize = chopSize as Float
		local objBB = nodeGetBoundingBox obj (Matrix3 1)
		local bbWidth = objBB[2].x - objBB[1].x
		local bbHeight = objBB[2].y - objBB[1].y
		
		local widthRatio = bbWidth / chopSize
		local heightRatio = bbHeight / chopSize
		
		local halfWidthOffset = (bbWidth/2.0)+(chopSize/2.0)
		local halfHeightOffset = (bbHeight/2.0)+(chopSize/2.0)
		
		local columns = (ceil widthRatio) as integer
		local rows = (ceil heightRatio) as integer
		
		setCommandPanelTaskMode #modify
		modPanel.setCurrentObject obj
		
		CopyAttrs obj
		
		--setup modifiers on source obj
		local vs = volumeSelect()
		vs.level = 2	--face
		vs.type = 1		--crossing
		vs.method = 0	--replace
		vs.volume = 0	--box
		
		addModifier obj vs
		local gizmoScale = [(1.0 / widthRatio), (1.0 / heightRatio), 1]
		vs.Gizmo.scale = gizmoScale
		
			--move it for now
		vs.gizmo.pos = [(bbWidth * 2.0), (bbHeight * 2.0), 0]
		
		local epMod = Edit_Poly()
		epMod.useStackSelection = on
		addModifier obj epMod
		
		local newGizmoPos = [0,0,0]
		
		--store previously selected faces to check against
		local faceRegister = #{}
		
-- 		format "rows: % \n" rows
-- 		format "Columns: % \n" columns
		local gridSeq = spiralArraySequence rows columns
		
		for visitor in gridSeq do
		(
			row = visitor.x
			col = visitor.y

			modPanel.setCurrentObject obj
			
			--newGizmoPos = [0, 0, 0]
			
			local newX = (col * chopSize) - halfWidthOffset
			local newY = (row * chopSize) - halfHeightOffset
			
			newGizmoPos = [newX, newY, 0]
			
			vs.gizmo.pos = newGizmoPos
			vs.method = 1
			
			modPanel.setCurrentObject obj.modifiers[1]
			local facList = EditPolyMod.GetSelection epMod #Face
			
			if (facList.numberSet != 0) and (facList.numberSet != obj.numFaces) then
			(
				local faceClash = faceRegister * facList
				local facesToChop = #{}
				if faceClash.numberSet > 0 then
				(
					facesToChop = facList - faceClash
				)
				else
				(
					facesToChop = facList
				)
				
				if (facesToChop.numberSet > 0) and (facesToChop.numberSet != obj.numFaces) then
				(
					local newChop = copy obj
					collapseStack newChop
					
					chopBitCount += 1
					newChop.name = namePrefix + "_" + (chopBitCount as string )
					
					
					--apply the orignals Gta Attrs to the chopped pieces
					PasteAttrs newChop
					
					polyOp.DeleteFaces newChop -facesToChop
					
					centerPivot newChop
					
					append meshBits newChop
					
					faceRegister += facList
				)
			)
		)
		
		--clean up
		delete obj
		
		--return the new pieces
		return meshBits
	),
	
		
	/***
	
	***/
	fn lockMesh theMesh =
	(
		setTransformLockFlags theMesh #all
	),
	
	
	/***
		Append meshes to a container
		Warn about overwriteing
	***/
	fn appendMeshesToContainer overwrite:false =
	(
		local containerName = currentTile.containerName
		
		--what area does this container live
		local localContainerPath
		
		if (currentTile.containerPath == undefined) then
		(
			localContainerPath = ContainerStruct.getContainerPath containerName
		)
		else
		(
			localContainerPath = currentTile.containerPath
		)
									
		--does it exist in perforce
		local depotPath = gRsPerforce.local2Depot localContainerPath
		local fStat = gRsPerforce.getFileStats depotPath
		
		if (fStat != undefined) and (fStat.count != 0) then	--it exists already
		(
			gRsPerforce.sync #(localContainerPath)
			gRsPerforce.add_or_edit localContainerPath
			
			--check for container lock file
			local lockFilePath = (getFilenamePath localContainerPath) + containerName + ".maxc.lock"
			if (doesFileExist lockFilePath) then
			(
				try
				(
					deleteFile lockFilePath
				)
				catch
				(
					format "Couldnt delete container lock file for container: % \n" lockFilePath
					gRsUlog.LogError ("Couldnt delete container lock file for container: " + lockFilePath)
				)
			)
			
			--open the container
			local containerNode = Containers.CreateInheritedContainer localContainerPath
			
			select containerNode
			
			--edit in place
			actionMan.executeAction -1172021248 "13"
			
			local contentNodes = #()
			containerNode.GetContentNodes false &contentNodes
			local contentNodeNames = for item in contentNodes collect item.name
			
			--see if any of the meshes already exist by name in the container nodes.
			local clashes = #()
			local meshes = for item in currentTile.meshes collect item.mesh
			
			for item in meshes do
			(
				--if ((findItem contentNodes item) != 0) then
-- 				if (containerNode.IsNodeInContent item false) then
-- 				(
-- 					append clashes item
-- 				)
				
				if (findItem contentNodeNames item.name) != 0 then
				(
					append clashes item
				)
			)
			
			--break()
			--got some clashing nodes, what we gonna do?
			if (clashes.count != 0) and not dataModel.DoOverWriteContainerContents then --we got some overwrite candidates.
			(
				dataModel.DoOverWriteContainerContents = querybox "There are items of the same name already in this container.\nWant to overwrite them?" title:"Overwrite?"
			)
			else	--no clashes so add them
			(
				containerNode.AddNodesToContent meshes
			)
			
			if (clashes.count != 0) and dataModel.DoOverWriteContainerContents then
			(
				format "dataModel.DoOverWriteContainerContents: % \n" dataModel.DoOverWriteContainerContents
				
				--delete the old ones first
				local clashnames = for item in clashes collect item.name
				for item in contentNodes do
				(
					if (findItem clashnames item) != 0 then
					(
						delete item
						--break()
					)
				)
				
				--now add the new ones
				containerNode.AddNodesToContent meshes
			)
			
			--save the container
			actionMan.executeAction -1172021248 "13"
			
			--remove it from the scene
			delete containerNode
			
		)
		else	--create the container
		(
			createContainer()
		)
	),
	
	
	/***
		Main terrain processing macro script
	***/
	fn CreateTerrainTilesProcess =
	(
		--Setup ulog
		gRsUlog.init "Create Terrain Tiles" appendToFile:false
		
		with undo off
		(
		
			processSetup()
			--If no blocks have been done already then generate them
			if blockArray.count == 0 do
			(
	-- 			messagebox "Need to process a heightmap first" error:"Missing Blocks"
	-- 			processMode = #ready
	-- 			return false
				processSetup()
			)
			
			--what do we need to do
			local doLODs = dataModel.DoLODs
			local doCreateTextures = dataModel.DoTextures
			local doMaterials = dataModel.DoMaterials
			local doMaterialIDs = dataModel.DoMaterialIDProjection
			local doCollision = dataModel.DoCollision
			local doCreateContainers = dataModel.DoContainers
			
			
			--create the normal proxy sampler
			local normalProxy = Plane name:"NormalProxy" Length:4 Width:4 lengthsegs:2 widthSegs:2
			convertToMesh normalProxy
			this.normalProxy = normalProxy
			
			--connect displace modifier
			createSpaceWarp()
			bindSpaceWarp normalProxy this.HMDisplace
			
			
			/***************************************
				Block Container setup Macro
			
			**************************************/
			--progressStart "Creating.."
			print "Creating.."
			/* BLOCK */
			
			-- PROGRESS BAR
			prog = RSProgressWindow Title:"Building Tiles"	
			prog.start()
			prog.StepProgressValue = 100.0 / (dataModel.ActiveGrid.count)
			--process each tile at a time and clean up before processing the next
			local moreToGo
			do
			(
				moreToGo = processNextTile()
				format "moreToGo? %\n" moreToGo as String
				--if not moreToGo then continue
				
				if moreToGo and (blockArray.count > 0) then
				(
					currentTile = blockArray[blockArray.count]
					format "CurrentTile: % \n" currentTile
					gRsUlog.LogMessage ("CurrentTile: " + currentTile.containerName)
					PushPrompt ("CurrentTile: " + currentTile.containerName)
					
					--Create the render mesh
					
					if dataModel.DoHD then
					(
						gRsUlog.LogMessage "Doing HD Tile..."
						
						--get a reference to the inital process model so we can delete it after creating the rendermesh
						local processModel = currentTile.getRenderMesh "_HD"
						local renderMesh = createBakeMesh currentTile "_HD"
						format "renderMesh: % \n" renderMesh
						gRsUlog.LogMessage ("renderMesh: " + renderMesh.name)
						
						if dataModel.DoLODs then
						(
							local renderLODMesh = createBakeMesh currentTile "_LOD"
							format "renderLODMesh: % \n" renderLODMesh
							gRsUlog.LogMessage ("Made renderLODMesh")
						)
						
						--delete the process mesh
						--delete processModel
						
						--Export mesh to an OBJ for ZBRush/MudBox
						if dataModel.DoObjs then
						(
							local success = objExport renderMesh
							if not success then
							(
								messagebox "Obj Export Failed" Title:"OBJ Export Fail"
								gRsUlog.LogWarning "Obj Export Failed"
							)
						)
					
						--Decimate with ProOptimize
						if dataModel.DoDecimateHD then
						(
							decimateBlock renderMesh #HD
							gRsUlog.LogMessage "Decimate HD mesh"
						)
						
						/* MATERIALS */
						if dataModel.DoMaterials then
						(
							gRsUlog.LogMessage "Apply materials"
							if (globalMultiSub == undefined) then
							(
								gRsUlog.LogMessage "Getting globale material"
								getGlobalMaterial()
							)
							
							--Apply a copy of the global terrain multiSub material
							renderMesh.material = globalMultiSub
							
							--Set the shaders to use the chopped tint and tint_normal textures.
							setMaterialTextures renderMesh.material #ttn
							gRsUlog.LogMessage "Set textures on material"
							
							--Run the Ultimate Mapper ch1 6x6 ch2 100x100
							ultimateMapMesh renderMesh
							gRsUlog.LogMessage "Ultimate mapper"
							
							--map channel3 on all 4 meshes to 512x512
							applyOtherMapping renderMesh
							
							if dataModel.DoMaterialIDProjection then
							(
								--Trigger the ID Projector for these meshes
								projectMatIds renderMesh currentTile
								gRsUlog.LogMessage "Projecting material IDs"
							)
						)
						
						--Set the Gta Attrs on these meshes including
						setGtaAttributes renderMesh currentTile #HD
						gRsUlog.LogMessage "Set Gta Attrs"
						
						--Run the mesh chopper
						local renderMeshBits = meshChop renderMesh chopSize:toolSettings.meshChopSize namePrefix:currentTile.containerName
						gRsUlog.LogMessage "Chop up the HD render mesh"
						
						for item in renderMeshBits do
						(
							gRsUlog.LogMessage "Lock transforms on chopped HD render mesh"
							lockMesh item
						)
						
						--	COLLISION
						if dataModel.DoCollision then
						(
							gRsUlog.LogMessage "Doing Collision for HD mesh bits"
							for meshPiece in renderMeshBits do
							(
								createCollisionMesh meshPiece
								--collisionmesh.parent = meshPiece
							)
						)
					)
					
					--	LODs
					if dataModel.DoLODs then
					(
						gRsUlog.LogMessage "Generating LODs"
						
						--get the LOD mesh for this tile
						local LODMesh = currentTile.getRenderMesh "_LOD"
						
						--Decimate with ProOptimize
						if dataModel.DoDecimateLOD then
						(
							decimateBlock LODMesh #LOD
							gRsUlog.LogMessage "Decimated LOD mesh"
						)
						
						--apply the material
						LODMesh.material = getLODMaterial()
						gRsUlog.LogMessage "Applied LOD material"
						
						--apply planar mapping
						addModifier LODMesh (Uvwmap())
						
						--only if HD is done to link to
						if dataModel.DoHD then
						(
							gRsUlog.LogMessage "Link LODs"
							if not (RsSceneLink.HasContainer LinkType_LOD LODMesh) then
							(
								RsSceneLink.AddContainer LinkType_LOD LODMesh
							)
							
							for item in renderMeshBits do
							(
								RsSceneLink.SetParent LinkType_LOD item LODMesh
							)
						)
						
						setGtaAttributes LODMesh currentTile #LOD
						gRsUlog.LogMessage "LOD Gta Attrs set"
						
						collapseStack LODMesh
						
						lockMesh LODMesh
					)
					
					/* CONTAINER */
					if dataModel.DoContainers then
					(
						gRsUlog.LogMessage "Append meshes to container"
						appendMeshesToContainer()
						/*
						if dataModel.DoLODs then
						(
							local LODMesh = currentTile.getRenderMesh "_LOD"
							appendMeshesToContainer LODMesh currentTile
						)
						*/
						
						--remove the container from the scene
	-- 					for obj in objects where (isKindOf obj Container) do
	-- 					(
	-- 						delete obj
	-- 					)
						
						--currentTile.deleteMeshes()
					)
					
					--Clean up
					--delete renderMeshBits
					
					prog.PostProgressStep()
				)
			)
			while moreToGo and not keyboard.escPressed
					
			--progressEnd()
			
			print "Clean Up"
			delete normalProxy
			delete this.HMDisplace
			
			--delete meshes
			--delete globalMultiSub
			--free blockArray
			
			prog.End()
		)
		gRsUlog.Validate()
		
		clearUndoBuffer()
		
		gc()
		(dotNetClass "System.Gc").Collect()
		
		
	),
	
	
	/***
	
	***/
	fn loadTileData =
	(
		local xmlIO = rsta_xml_io()
		xmlIO.xmlFile = tileDataPath
		xmlIO.load()
		
		local tileNodes = xmlIO.root.ChildNodes
		
		for t=0 to (tileNodes.Count - 1) do
		(
			local tile = tileNodes.Item t
			--create a tileData instance
			local data = TileData()
			
			local tileProperties = tile.ChildNodes
			for i=0 to (tileProperties.count - 1) do
			(
				propNode = tileProperties.Item i
				case propNode.Name of
				(
					"PositionX":data.position.column = propNode.InnerText
					"PositionY":data.position.row = propNode.InnerText
					"ContainerName":data.containerName = propNode.InnerText
					"ContainerPath":data.containerPath = propNode.InnerText
					--"ContainerPosition":
					--"Textures":
				)
			)
			
			local tileKey = data.containerName
			
			--add it to the TileData Dictionary
			tileDataDict.Add tileKey (dotNetMXSValue data)
		)
	),
	
	
	/***
		Load Settings
	***/
	fn loadToolSettings =
	(
		hmmSettingsAssembly = CSharp.CompileToMemory #(RsConfigGetWildWestDir() + "etc\config\maps\HMM_Tool_Settings.cs")
	
		local hmmSet = dotnetclass "HMMSettings"
		
		local ser = dotnetobject "System.Xml.Serialization.XmlSerializer" hmmSet
		
		stream = dotNetObject "System.IO.StreamReader" (RsConfigGetWildWestDir() + "etc\config\maps\HMM_Tool_Settings.xml")
		local allSettings = ser.Deserialize(stream);
		
		toolSettings = allSettings.items[1]
		containerGridSettings = allSettings.items[2]
		
		stream.close()
		
		--print settings
	),
	
	
	/***
	
	***/
	fn initContainerStruct = 
	(
		ContainerStruct = ContainerGridSetup()
		ContainerStruct.layoutImage = openBitMap containerGridSettings.LayoutImage
		ContainerStruct.alphaGrid = for item in containerGridSettings.GridAxes.Columns[1].Column collect item.value
		ContainerStruct.tileSize = containerGridSettings.TileSize
		ContainerStruct.areas = containerGridSettings.Areas
		
		for item in containerGridSettings.Areas do
		(
			ContainerStruct.areaDict.addKey item.Name item
		)
		
		local columnOffset = containerGridSettings.GridAxes.ColumnOffset
		local rowOffset = containerGridSettings.GridAxes.RowOffset
		ContainerStruct.mapTileOffset = [columnOffset, rowOffset]
		
		ContainerStruct.gridCorner = [(dataModel.WorldOriginX + dataModel.MapOffsetX), (dataModel.WorldOriginY + dataModel.MapOffsetY)]
		
		ContainerStruct.getContainerDefsFromBitmap()
	),
	
	
	-----------------------------------------------------------------------------------
	-- WINDOW FUNCTIONS ---------------------------------------------
	-----------------------------------------------------------------------------------
	fn dispose =
	(
		storeUISettings()
		
		if (MainWindow != undefined) do
		(
			-- WINDOW POS
			UISettings.wpf_windowPos mainWindow #set
			-- CLOSE AND DISPOSE THE WINDOW
			MainWindow.Close()
			MainWindow = undefined
		)
		execute ("HeightMapMesherUI = undefined")
	),
	
	
	-------------------------------------------------------------------
	fn init =
	(
		-- LOAD ASSEMBLY
		local dllPath = (RsConfigGetToolsDir() + "techart/dcc/3dsMax/HeightMapMesher.dll")
		if not (doesFileExist dllPath) then
		(
			messageBox "The HeightMapMesher.dll is missing. Exiting" title:"Error: Missing Dll"
			return false
		)
		
		dotnet.loadAssembly dllPath
		-- MAKE MAIN WINDOW INSTANCE

		MainWindow = dotNetObject "HeightMapMesher.MainWindow"
		dn_window.setup MainWindow
		MainWindow.Tag = dotnetmxsvalue this
		-- PARENTS THE WINDOW UNDER MAX, STOPS IT FROM DROPPING BEHIND
		MainWindow.ChangeOwner (DotNetObject "System.IntPtr" (Windows.GetMAXHWND()))
		-- WINDOW POS
		UISettings.wpf_windowPos mainWindow #get
		-- SHOW THE WINDOW
		MainWindow.show()
			
		--set title
		MainWindow.Title = ("HeightMap Mesher | v" + this.verNum + " " + this.verName)
			
		loadToolSettings()
		
		--set the DataModel alias
		dataModel = MainWindow.DataModel
	
		restoreUISettings()

		initContainerStruct()
	),
	
	-- EVENTS -----------------------------------------------------
	on create do init()
	
)
HeightMapMesherUI = HeightMapMesherUI()