[comp.graphics] Renderer question

dwex@cbnewsj.att.com (david.e.wexelblat) (04/11/91)

Does anyone know of a rendering system that lets you specify object
transformations relative to the eye position, in addition to 
world coordinate transformations?

I can hear you asking "why bother?"  I can think of a couple of
interesting applications.  The best one is for doing fly-by
animations.  If you could specify objects relative to the eye (e.g.
an airplane cockpit), then the animation can be done simply by
moving the eye, and the cockpit moves with it as you fly around 
your scene.

Another application might be sticking lens in front of the eye, and
moving around the scene.

I was thinking about adding this capability to Rayshade, since it
already works with the C preprocessor.  The eye location could be
specified by preprocessor macros, and the animation done with a
shell script that just changes the eye parameters.

Any opinions?

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