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Kenneth wrote:
> I'm not sure, but the slope pattern may not be working correctly(?).
> I went back through the postings in several newsgroups, but didn't see
> anything about it.
> 
> Using slope {0,-1,0} and without choosing Lo_slope and Hi_slope values, the
> pattern does what is expected....covering the object "fully" with a
> color_map or texture from top to bottom (that is, assigning the color_map
> to the full 0-to-1 "slope"...all the object's normals.)
> 
> But sticking in Lo_slope and Hi_slope values ...like 0, .5
> respectively...doesn't *seem* to do what the docs say:
> 
> "By specifying Lo_slope and Hi_slope you get more control:
>   slope { <Direction>, Lo_slope, Hi_slope }
> Lo_slope and Hi_slope specifies which range of slopes are used, so you can
> control which slope values return which pattern values. Lo_slope is the
> slope value that returns 0.0 and Hi_slope is the slope value that returns
> 1.0."
> 
> The way I read it, if I choose Lo_slope and Hi_slope to be 0 and .5, then
> the function should completely ignore any object normals outside that range
> and should map the full color_map only to the specified normals, nowhere
> else. But the color map repeats at slope .5 and continues down to slope
> 1.0. ...in other words, it's re-applied to the object's
> normals that are outside the range.
>  If I make Hi_slope something like .2, then the visual result is
> exactly the same as if I had used the frequency keyword on a typical
> pattern: the color map repeats five times.
> 
	Have you tried adding the "ramp_wave" keyword to your pigment
definition? http://www.povray.org/documentation/view/3.6.1/404/

		Jerome

- --
******************************
*      Jerome M. Berger      *
*  mailto:jeb### [at] freefr   *
*  http://jeberger.free.fr/  *
******************************
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