Re: [Plib-users] Shadow

[Steve B. <sjb...@ai...>]

Ran...@ma... wrote:
> 
> Michael Wessels writes:
> 
>  > in my flight simulator I like to introduce shadowing of the airplane to
>  > the ground.
>  > My question is , if anybody has experiences to do this in conjunction
>  > with using PLIB for the geometry presentation.
> 
> If anyone starts on this, they could try to model the "hotspot" which
> surrounds the shadow.  The lit ground/water/trees whatever are quite
> noticably brighter immediately around the shadow due to the angle of
> incidence and reflection.

NO!!!  You are seeing a 'mach band' which is an optical illusion that
will happen the same way in your program as it does in the real world
and doesn't have to be simulated.

There is no significant angle-of-incidence effect for most materials.

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