Re: CGShading
Re: CGShading
- Subject: Re: CGShading
- From: "John C. Randolph" <email@hidden>
- Date: Tue, 12 Oct 2004 14:07:14 -0700
On Oct 12, 2004, at 1:41 PM, R. Scott Thompson wrote:
Just a note, I don't think that CGShading will let you create the
same kind of gradient in the sample (at least not easily).
It can, you just need to use more than one gradient and composite one
over the other.
That's why I said "(at least not easily)" :-) You might try using
four radial shadings, one centered at each of the four corners and set
them up to fade to 0 by the time you get to the opposite corner. That
would get something close, but not the same, as the barycentric
shading.
You can't really use axial shadings because an axial shading can only
vary in one direction (i.e. you could get it to fade in the x
direction, but for the barycentric effect, you also want it to fade in
y and you can't do both with CGShading).
Sure you can. You just draw it along a 45-degree vector. See David
Hill's example at:
http://developer.apple.com/samplecode/Cocoa_CG_shading_demo/
Cocoa_CG_shading_demo.html
CGShading wouldn't be very useful if it could only be drawn along the X
or Y axis.
-jcr
John C. Randolph <email@hidden> (408) 974-8819
Sr. Cocoa Software Engineer,
Apple Worldwide Developer Relations
http://developer.apple.com/cocoa/index.html
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