Projection stuff

Well i''m doing some kind of software renderer with the help of some tutorials and i''m noticing that the guys do the following: -set the local coordinates for a point -multiply the point by the world(modelview) matrix -multiply the point by the projection matrix but the strange thing is that the projection matrix is identity.They aren''t touching it and it''s still working.Does anyone have any explanation of that??? ----------------------- |NOTHING IS REAL...YET| -----------------------