Working on Terrain Manager class...

%group = nameToID(MissionGroup);

if(%group !=-1)
{
	%count =%group.getCount() -1;
	for(%i= 0; % <=%count; %i++)
	{
		%obj= %group.getObject(%i);
		if(!strICmp(%obj.getClassName, "TerrainBlock"))
			%obj.save(%obj.terrainFile);
	}
}
// else no terrain to save

MissionGroup.save(%filename);

function oneWord(%text)
{
	return strReplace(%text, " ", "_");
}

function EditorSaveMission()
{
	%missionname= oneWord(MissionInfo.name);
	%missionfile= $missionDir @"/"@ %missionname @"/mission.mis";
	
	// first check for dirty and read-only files:
	if((EWorldEditor.isDirty || ETerrainEditor.isMissionDirty) && !isWriteableFileName(%missionfile))
	{
		MessageBoxOK("Error", "Mission file \""@ %missionfile @ "\" is read-only.");
		return false;
	}
	
	%group = nameToID(Terrain);
	
	%terrCount= 0;
	%count =%group.getCount() -1;
	for(%i= 0; %i <=%count; %i++)
	{
		%obj= %group.getObject(%i);
		if(!strICmp(%obj.getClassName(), "TerrainBlock"))
		{
			// OK this is a terrain, we can now go on.
			// Are we allowed to modify this terrain?
			if(!%obj.preserveFile)
			{
				// Are we allowed to change the terrain file's location?
				if(!%obj.lockFile)
				{
					// Generate filename
					%terrainfile= $terrainDir @"/"@ %missionname @"/terrain"@ %terrCount @".ter";
					%terrCount++;
					%obj.terrainFile= %terrainfile;
					
					// Check detail map
					if(strICmp(%obj.detailTexture, TerrainMgr.detailTexture))
					{
						%obj.detailTexture= TerrainMgr.detailTexture;
						ETerrainEditor.isDirty= true;
					}
				}
				else %terrainfile= expandFilename(%obj.terrainFile);
				
				// File is now set. Let us save.
				
				// is the file read-only?
				if(ETerrainEditor.isDirty && !isWriteableFileName(%terrainfile))
				{
					MessageBoxOK("Error", "Terrain file \""@ %terrainfile @ "\" is read-only.");
					return false;
				}
				
				// Save
				if(ETerrainEditor.isDirty || !isFile(%terrainfile))
					%obj.save(%terrainfile);
			}
			// /OK this is a terrain, we can now go on.
		}
	}
	
	
	// Save the mission at last
	if(EWorldEditor.isDirty || ETerrainEditor.isMissionDirty || !isFile(%missionfile))
		MissionGroup.save(%missionfile);
	
	EWorldEditor.isDirty = false;
	ETerrainEditor.isDirty = false;
	ETerrainEditor.isMissionDirty = false;
	
	return true;
}

new TerrainManager(TerrainMgr) {
      rotation = "1 0 0 0";
      scale = "1 1 1";
      numBlocksWide = "2";
      numBlocksHigh = "1";
      squareSize = "8";
      detailTexture = "~/data/world/detail/detail01.png";
   };
   new SimGroup(Terrain) {

      new TerrainBlock() {
      detailTexture = "~/data/world/detail/detail01.png";
      terrainFile = "./terrain0.ter";
         locked = "true";
         lockFile = "false";
         preserveFile = "false";
      };
      new TerrainBlock() {
      detailTexture = "~/data/world/detail/detail01.png";
      terrainFile = "./terrain1.ter";
         locked = "true";
         lockFile = "false";
         preserveFile = "false";
      };
   };