[vtkusers] Maximum SpecularPower in vtkProperty

[Francois Bertel]

Hi,

I don't thing there is any good reason. Tracking down to the first
commit that introduced SpecularPower does not tell much (vtkProperty.h
rev 1.3, 1994-01-28 by Ken Martin).

In a similar way, rev 1.8 (1995-04-20 by Ken Martin) of vtkLight.h
introduced Exponent that should be in the range [0.0,128.0] as well
but there is no use of SetClampMacro().

I'll fix both files tomorrow.

On Mon, Mar 9, 2009 at 6:03 PM, Moreland, Kenneth <kmorel at sandia.gov> wrote:
> I recently noticed that vtkProperty clamps SpecularPower to the range
> [0,100].  However, OpenGL allows the equivalent parameter (GL_SHININESS) to
> be in the range [0,128].  Is there a reason for this discrepancy?
>
> -Ken
>
>    ****      Kenneth Moreland
>     ***      Sandia National Laboratories
> ***********
> *** *** ***  email: kmorel at sandia.gov
> **  ***  **  phone: (505) 844-8919
>     ***      web:   http://www.cs.unm.edu/~kmorel
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François Bertel, PhD  | Kitware Inc. Suite 204
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