Re: CGShading

FROM : R. Scott Thompson
DATE : Wed Oct 13 03:41:39 2004

On Oct 12, 2004, at 6:38 PM, John C. Randolph wrote:

> I'm pretty sure I can reproduce the effect with three axial shadings,
> since each RGB component's value in my original code is a simple
> linear function of the pixel's distance from the origin.


My mistake,  you're absolutely right.  I saw the different colors at
the four corners and thought the code was blending all four smoothly
together.  Looking at the code more closely, I see that you are just
using 3 linear gradients meshed together.

If you wanted to have a rectangle with one corner red, one corner blue,
one corner green and one corner black, then blend them all together in
a nice smooth gradient... you can't do that with CGShading yet :-) 
(you can do it in PDF using a Coons Patch shading with straight sides).

Scott


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