How to use orthographics projection

Can someone explain to me how you use orthographic projection as one of the camera modes. An example of it in use would be helpful.

I assume it is a view in a particular direction with no perspective. Is this correct?

Yes.

Graphics3D 640,480,32,2

cube=CreateCube()
RotateEntity cube,45,45,45

cam=CreateCamera()
;comment the following two lines to view it unorthoganoly
CameraProjMode cam,2
CameraZoom cam,.1

PositionEntity cam,0,0,-5

WireFrame True 

While Not KeyHit(1)
	RenderWorld
	Flip
Wend

Okay, not much of a sample in use. It is usually used for isometric 3d, like the 3d view in "ant attack" (in the showcase section now I believe)

Thanks heaps, after testing out a few things it looks like just what I am after.

Matty, you'll get all sorts of z order issues - which you'll soon find out.

It's better IMHO to set up a high camerarange, move the camera far away from the scene and camerazoom right in - acheives much the same effect without the z-order issues.

Haven't used it for a long time, but I seem to recall it being quite slow too?

That may be because there is currently no entity level orthographic mode culling. The culling you do get is based on the equivalent settings for a perspective camera. And of course a zoom of 0.1 gives you a pretty large FOV with a perspective camera. Stuff still gets clipped of course but a lot of unnecessary geometry may have to be processed.

That would certainly make sense, but I don't think it would have been an issue in the game I was thinking of. Could be though.