Model
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Models are the basic elements that make up a 3D game world. They are 3D objects made out of textured triangles. Characters in your game, items, props, and even the walls, floor, and ceiling of the world itself are all examples of models.
A couple of famous models are the Utah Teapot and the Cornell Box.
Model Storage
Models can be stored in different ways. A model format is a set of rules that describe how a model is stored in a contigious area of memory - be it RAM, in a database or on your hardrive.
"Generally speaking, you have a list of vertices, and triangles are stored as indices into the list of vertices. This is the format in which graphics cards can most efficiently accept model data. However, specific file formats vary in their approach and usually require some kind of transformation to get the data into a GPU-friendly form." - ReedBeta
Check forlloing thread(s) for more info:
- On model data storage formats... (http://www.devmaster.net/forums/showthread.php?t=4646),
Common Formats
- MD2 - Quake II
- MD3 - Quake III
- MDL - HalfLife
- MD5 - Doom III
- 3DS - 3D Studio Max
- MS3D - Milkshape 3D
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