On 7 Mar 2001 14:12:53 -0500, Ron Parker wrote:
>On Wed, 7 Mar 2001 17:11:42 -0000, Tom Melly wrote:
>>I am feeling vaguely inspired to try making a new pattern type.
>>
>>It would be almost indentical to "average" but would add values rather than
>>average them.
>
>You could just use average but multiply all of the color values in your
>pigments by the number of pigments you're averaging.

Here's an example:

#declare pig1 = pigment {bozo color_map {[0 rgb 0][1 red 3]} 
    translate 0 scale .2}
#declare pig2 = pigment {bozo color_map {[0 rgb 0][1 blue 3]} 
    translate 50 scale .2}
#declare pig3 = pigment {bozo color_map {[0 rgb 0][1 green 3]} 
    translate 100 scale .2}
#declare pig4 = pigment {average pigment_map {[1 pig1][1 pig2][1 pig3]}}

sphere {0,2 texture {pigment {pig4} finish {ambient 1}}}
camera {location -5*z look_at 0}

-- 
Ron Parker   http://www2.fwi.com/~parkerr/traces.html
My opinions.  Mine.  Not anyone else's.

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