Object List file

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Object List files are configuration files used in the Windows PC version of LEGO Rock Raiders to designate the locations of objects within levels. They use the filename extension .ol, though any extension can be used as long as the file's actual formatting remains the same. Each level has its own Object List file, located in its folder by default and defined in each level's section in Lego.cfg using the line OListFile.

One of several Level Files located in a Mission's level folder, the OL File designates the locations of Objects, such as Buildings, vehicles, Rock Raiders, creatures, and the Camera. It is unencrypted and easily editable in notepad or more preferably using the RRU Level Editor. Each entry in the OL File designates the coordinates and facing angle of a certain object. Buildings are often placed with the main part of the construction in the center of a square (ex: 7.5, 8.5), with the Power Path part of the construction pointing towards the facing angle. The facing angle or heading is in degrees in typical compass format, with 0 degrees pointing to the top of the map, and 90 degrees pointing to the right side of the map. The maximum number of objects that can be present in the OL file at a time is 200 (anymore would exceed its memory pool, causing the level to crash). While the allotted name of the object in the can be anything, it typically is in the format "Object#" using a number "#" to keep track of the amount of Objects used. Any special objects that are used in script are referred to using this allotted name.

Typical Ol File Format:

Lego* {

	Object1 {
		type	[ObjectName]
		xPos	[X-Coordinate Location]
		yPos	[Y-Coordinate Location]
		heading	[Facing Angle]
	}

}

Where ObjectName is an object as it is defined in the ObjectNames or MiscObjects lists in the Main LEGO Config file.

If an object list is missing a camera, the game will crash on startup. If an object list has a camera but lacks any exposed units, the game will run up to Chief's briefing in that level, where it will softlock.