set units to centimeters before importing or exporting

set back to original units once import/export complete

Author: vkovec

Assets/Integrations/Autodesk/max/scripts/UnityFbxForMaxPlugin.ms

@@ -37,8 +37,14 @@ macroScript UnityImport category:"Unity"
         origObjects = objects as array
         callbacks.addScript #postImport ("afterImport()") id:#unityPlugin
 
+        -- set the system units to centimeters
+        local origUnits = units.SystemType
+        units.SystemType = #Centimeters
+        
         importFile fbxFileName using:FBXIMP
 
+        units.SystemType = origUnits
+        
         unityFbxFilePathAttr = getFilenamePath fbxFileName
         unityFbxFileNameAttr = filenameFromPath fbxFileName
 
@@ -83,6 +89,9 @@ macroScript UnityExport category:"Unity"
         select exportSet
     )
 
+    local origUnits = units.SystemType
+    units.SystemType = #Centimeters
+    
     exportFileName = undefined
     if unityFbxFilePathAttr != undefined and unityFbxFileNameAttr != undefined then(
         exportFileName = unityFbxFilePathAttr + unityFbxFileNameAttr
@@ -96,6 +105,8 @@ macroScript UnityExport category:"Unity"
         exportFile exportFileName #noPrompt selectedOnly:true using:FBXEXP
     )
 
+    units.SystemType = origUnits
+    
     if origSelection != undefined then (
         select origSelection
     )

Assets/Integrations/Autodesk/max/scripts/unityFbxExportSettings.ms

@@ -17,7 +17,7 @@ FbxExporterSetParam "Lights" true
 FbxExporterSetParam "EmbedTextures" false
 
 -- Units
---FbxExporterSetParam "ScaleFactor" 1
+FbxExporterSetParam "ScaleFactor" 1
 FbxExporterSetParam "ConvertUnit" "cm"
 
 -- Axis Conversion