It´s both
The modelfilename is copied into that string and then used for forcefield.

@all the others, I will have a look at your requests in the evening (it´s 1 am now...).

Lite-C Tut. 1 Lite-C Tut. 2 Lite-C Tut. 3 (en)
Shader Tutorial (ger)

http://www.slindev.com