Re: How to relect/mirror a Performer window

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Michael Jones (mtj++at++babar)
Fri, 3 Jun 1994 08:06:21 -0700

On May 19, 11:11am, Richard Gallery wrote:
> Subject: How to relect/mirror a Performer window
:Hi
:
:I have an application where I wish to relect or mirror
:the viewport of a Performer window. Specifically, I
:need to do this for a home-grown HMD that requires
:mirrored images for correct display, but also I can
:imagine situations such as a car simulator, in which
:the user sees a mirrored image representing the view
:out the back window of the car simulator that they are
:driving, in which it would be necessary to do this.

Several ideas are at work here. Pick and choose from:

1. Compute a mirror projection DCS and change the
    culling mode to be the opposite: cull-front and draw
    back faces.

2. Compute the virtual eyepoint and render a channel
    with that eyepoint. Like this:

     + virtual eye
      \
        \
    -------- mirror
        /
      /
     + normal eye

-- 


Be seeing you,      Phone:415.390.1455  Fax:415.390.2658 M/S:9U-590
Michael T. Jones    Silicon Graphics, Advanced Graphics Division
mtj++at++sgi.com         2011 N. Shoreline Blvd., Mtn. View, CA 94039-7311

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