Re: Scaling component for channel ViewMatrix

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Angus Dorbie (dorbie++at++sgi.com)
Tue, 27 Apr 1999 12:04:46 -0700

The view matrix is actually the modelview.

Neither far nor near will be affected.

Ofcourse if you apply this scale in the right place it will LOOK as if
both are affected but it will actually be the model geometry.

You could make it look like only the far is adjusted by scaling about
the near plane using translations but the frustum & clip is usually
defined in the projection matrix so don't confuse the two operations.

Cheers,Angus.

Scott Herod wrote:
>
> I've been playing with adjusting a channel's ViewMatrix
> by hand and tried applying a uniform scaling to the matrix.
> My tests suggest that the far clipping plane is changed
> by the scale but that the near clipping plane is not. Can
> I depend on changes to the viewing frustum with a scaled
> view matrix or is the behavior of the frustum undefined?
>
> Thank you,
>
> Scott Herod
> scott++at++evt.com
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