Subject:
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Re: Why Type 5 Lines?
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Newsgroups:
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lugnet.cad.dev
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Date:
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Fri, 19 Apr 2002 13:58:32 GMT
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Viewed:
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642 times
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In lugnet.cad.dev, Travis Cobbs wrote:
> In lugnet.cad.dev, Steve Bliss writes:
> > In lugnet.cad.dev, Kyle McDonald wrote:
> >
> > > Looking at the code below I don't actually see the Z buffer offset being used,
> > > but the one thing I did notice in the above paragraph is that he suggests
> > > switching the culling of the wireframe copy of the geometry.
> >
> > One problem: transparent surfaces would show the wireframe backside. :\
>
> Actually, transparent surface should work fine. As long as they are set to
> write to the Z buffer when drawn, and their outlines are drawn with Z buffer
> testing enabled, they should work fine. The wireframe parts that aren't
> supposed to be visible won't be drawn in the first place (which is actually
> the same thing that happens for the opaque portions).
The backside wireframe elements *will* be drawn, that's the point of
what Kyle was talking about. The idea is to draw the wireframe of the
backside surfaces and it will all be hidden by the frontside surfaces,
*except* for the lines around the outlines of the objects.
Except that transparent frontside surfaces will reveal the wireframe
backsides.
Steve
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Message has 1 Reply:
 | | Re: Why Type 5 Lines?
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| (...) I understand what you are saying, but it won't happen that way if Z buffer writing is enabled during the drawing of the transparent surfaces. The transparent surfaces aren't really transparent. They're just blended with whatever is behind (...) (22 years ago, 19-Apr-02, to lugnet.cad.dev)
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Message is in Reply To:
| | Re: Why Type 5 Lines?
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| (...) Actually, transparent surface should work fine. As long as they are set to write to the Z buffer when drawn, and their outlines are drawn with Z buffer testing enabled, they should work fine. The wireframe parts that aren't supposed to be (...) (22 years ago, 18-Apr-02, to lugnet.cad.dev)
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