Re: Fixed Object Size

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Ran Yakir (rany++at++rtset.co.il)
Sat, 11 Jan 1997 16:36:52 -0800

GARY ADAIR wrote:
>
> I have a Performer scene with a number of 3D objects, such as F-18
> aircraft, ships, and missiles. Is there a way to force the size of an object
> to appear constant, so that as the eyepoint either moves toward or away from
> the object, it does not get bigger or smaller, but appears to be the same size
> no matter where the eyepoint is.

Here is an easy, and fairly accurate way :

You have to decide which is the reference range, at which the plane is
seen in a one-to-one ratio (i.e. at its real size). For each frame,
calculate the range of the plane from the eyepoint, and scale the
plane's DCS by the ratio of the range and the reference range.

Ran

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