 | | Drawing triangles in a Z buffer
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Hey all, In trying to implement a LDraw renderer I've been scouring the web looking for raster-painting algorithms. While I've found plenty of line-drawing algorithms (the Bresenham seems to be pretty nice) I haven't found squat for drawing a filled (...) (23 years ago, 13-Feb-02, to lugnet.cad.dev, lugnet.off-topic.geek)
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| | Re: Drawing triangles in a Z buffer
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Here is one starting point: (URL) of free information, there is at least one quick-and-dirty FAQ under there written by an excited child. You're looking for something about triangle or scan line rasterization with z-buffer. I assume you've done (...) (23 years ago, 13-Feb-02, to lugnet.cad.dev, lugnet.off-topic.geek)
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| | Re: Drawing triangles in a Z buffer
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(...) I may be missing your point/problem but... Think you may need to go bi-linear in your Z calcs. Yes this makes a Suppos'dly one pixel lookup method a two+ per pixel but if you are already using a scan line method you have the precalculated (...) (23 years ago, 13-Feb-02, to lugnet.cad.dev, lugnet.off-topic.geek)
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| | Re: Drawing triangles in a Z buffer
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(...) If you don't mind C code, there's the zAddTriangle() function in stub.c in the ldlite or ldglite source code. The old 1.6 ldlite source is a bit easier to follow since it doesn't have all the extra shaders. Also, it's a linear z-buffer, which (...) (23 years ago, 13-Feb-02, to lugnet.cad.dev, lugnet.off-topic.geek)
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| | Re: Drawing triangles in a Z buffer
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"Sproaticus" <jsproat@io.com> skrev i meddelandet news:GrGFrK.9nJ@lugnet.com... (...) There must surely be one (or more) in Graphical Gems (URL) (if that URL still is valid, otherwise search for Graphical Gems) a bit dated, c code, but useful. -- (...) (23 years ago, 13-Feb-02, to lugnet.cad.dev, lugnet.off-topic.geek)
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| | Re: Drawing triangles in a Z buffer
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Graphics Gems covers basic stuff only where the presenter has an innovation. But they've been very good over the years. You can get any of their example source code online. Do pay a visit here: (URL) guys were in Gems IIR, and their book is worth (...) (23 years ago, 13-Feb-02, to lugnet.cad.dev, lugnet.off-topic.geek)
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