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Re: object graphics - transparent surfaces [message #48982 is a reply to message #48859]

Tue, 06 June 2006 05:53

greg michael
Messages: 163
Registered: January 2006

Senior Member

Thanks, Mike. Yes, that's what I do. The peaks do stick out, but what
you would expect would be a blue or red shadow on topographic edges.
What I get (when things go badly) are blocks of pure red, where the
underlying (from behind the ridge) blue information is obliterated. A
pity there's no image posting facility here - I could show you.

I agree that your solution should work - in the short term, I shall
probably do that.

many greetings,
Greg

mgalloy@gmail.com wrote:
> Presumably, you rotate or translate each surface some small amount to
> represent the change between eyes? Doesn't this cause peaks of the
> surface stick out? The problem with transparency in object graphics is
> the order the atoms are added to their parent matters. So if you have
> two atoms that intersect -- i.e. neither is strictly in front or behind
> the other, sometimes one is in front, sometimes the other is -- then
> you can't choose an order that makes the transparency work.
>
> My suggestion would be to rotate and render each surface separately in
> a buffer, read the buffer, and then blend the images (either yourself
> or using ALPHA_CHANNEL).
>
> I wrote some code that does this, but I have to re-implement this in
> order to give it away.
>
> Mike
> --
> www.michaelgalloy.com

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[Message index]

		Re: object graphics - transparent surfaces By: Rick Towler on Tue, 30 May 2006 09:49
		Re: object graphics - transparent surfaces By: Michael Galloy on Tue, 30 May 2006 09:16
		Re: object graphics - transparent surfaces By: greg michael on Tue, 06 June 2006 05:53
		Re: object graphics - transparent surfaces By: Michael Galloy on Fri, 16 June 2006 08:52
		Re: object graphics - transparent surfaces By: greg michael on Wed, 28 June 2006 06:46
		Re: object graphics - transparent surfaces By: greg michael on Tue, 06 June 2006 05:44

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