• The spïn resource (stored in EV Graphics)
	Spin resources contain sprite info. Whenever EV needs to load a set of sprites for a particular object, it looks at that objects's spin resource, which in turn tells the game how to load the object's sprites. EV sprites are stored as paired sprite and mask PICT resources. The sprites in each PICT are arranged in a grid, which can be of any size. The spin resource tells EV what shape and size the sprites' grid is. Spin resources have the following fields:

SpritesID	ID number of the sprites' PICT resource
MasksID	ID number of the masks' PICT resource
xSize	Horizontal size of each sprite (should be a multiple of 8!)
ySize	Vertical size of each sprite
xTiles	Horizontal grid dimension 
yTiles	Vertical grid dimension 

Spin resources have certain reserved ID numbers, which correspond to different types of objects:

128-191	Ships
200-263	Weapons
300-363	Stellar objects
400-402	Explosions
500	Boxes

It is important to note that the ID numbers of the PICT resources are non-critical, as EV looks at the spin resources to find the sprites, and not at the actual PICT ID numbers themselves.

Note: The total number of sprites in the graphics file (used by EV to update the progress bar during startup time) is stored in 'spït' resource 128 in the EV Graphics file.