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How do I set up something that is black on the left and white on the
right? Before you answer, I want the demarcation at x=0, and the max &
min extent in x can vary wildly, and it's a BLOB! (The arms can swing
out.) This question is no-brainer if we are talking an unchangingsphere
but perhaps not solvable w/ pov if we are talking a blob of varying
extent.
The following solution won't work, because it is reflected over the x=0
plane.
pigment { gradient x
pigment_map{
[0 Black]
[0.5 Black]
[0.51 White]
[1 White]
}
}
If I translate the image map, this won't work either, because it will
start at min extent of the actual figure, something impossible to
determine with a blob.
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Greg M. Johnson <"gregj;-)56590""@aol.c;-)om> wrote in message
<38ebfafb$1@news.povray.org>...
>How do I set up something that is black on the left and white on the
>right? Before you answer, I want the demarcation at x=0, and the max &
>min extent in x can vary wildly, and it's a BLOB!
>The following solution won't work, because it is reflected over the x=0
>plane.
Try this:
pigment
gradient x
pigment_map{
[0 Black]
[0.5 Black]
[0.5 White]
[1 White]
}
translate x*-0.5 /* Center the map */
scale <10000,1,1> /* Make this as large as you want */
}
/* Mark */
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YES! how simple! I was incorrectly thinking that gradient x had to anchor
itself off the leftmost edge of the object, and hence all my confusion.
Mark Wagner wrote:
> Try this:
> pigment
>
> gradient x
> pigment_map{
> [0 Black]
> [0.5 Black]
> [0.5 White]
> [1 White]
> }
> translate x*-0.5 /* Center the map */
> scale <10000,1,1> /* Make this as large as you want */
> }
>
> /* Mark */
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