 | | Re: Clipping / CCW / CW / INVERT
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Isn't a CLIPPING tag redundant? Programs should always clip when drawing an opaque part, and never clip when drawing a transparent part. -Gary (25 years ago, 8-Oct-99, to lugnet.cad.dev)
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| | Re: Comprehensive meta-command list
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Lars C. Hassing wrote in message <939391242.591663@ns.cci.dk>... (...) benefit. (...) I'm not sure I follow. The rendering engine will always assume an implied INVERT whenever it encounters a negative orientation matrix determinant to cancel the (...) (25 years ago, 8-Oct-99, to lugnet.cad.dev)
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| | Re: Clipping / CCW / CW / INVERT
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(...) I put in WINDING UNKNOWN because it explicitly states that the winding is unknown (and probably bad). This way, you can effectively disable clipping for a particular section of (unchecked) code, without having to force clipping back on at the (...) (25 years ago, 8-Oct-99, to lugnet.cad.dev)
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| | Re: Clipping / CCW / CW / INVERT
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(...) No, when I look at the images I see real alpha-blended surfaces :) I've tried to turn backface culling in the transparent parts and they looked very ugly, it's better to draw everything in those cases. (...) Just a note to correct the (...) (25 years ago, 8-Oct-99, to lugnet.cad.dev)
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| | Re: Track parts naming scheme survey
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(...) My 12V trains don't move when I put them on the 4.5V-only track :) Now seriously, maybe we could drop the "4.5" from the name and replace it with "old" but I don't think it's going to be a good idea. Of course we'd have to keep the current (...) (25 years ago, 8-Oct-99, to lugnet.cad.dev)
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| | Re: Clipping / CCW / CW / INVERT
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(...) I don't need the WINDING UNKNOWN, since it's redundant with CLIPPING OFF. When clipping is OFF you don't care the state of the winding. I am curious, what is CLIPPING -1 ? an UNKNOWN, CLIPPING when not found is assumed as OFF (the safe side), (...) (25 years ago, 8-Oct-99, to lugnet.cad.dev)
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| | Re: Clipping / CCW / CW / INVERT
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(...) touche'! (...) Not exactly! If the color has any transparency, force CLIPPING OFF, irrespective of what the file TAGS inform. (SIDE NOTE) when using the tag 0 CLIPPING ON you are not informing the program that it MUST do clipping, but instead (...) (25 years ago, 8-Oct-99, to lugnet.cad.dev)
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| | Re: Comprehensive meta-command list
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(...) I think that the ideia here is: - Assume any file you reference as CCW WINDING (assuming CCW as default) - Assume any file as it's polygonal faces facing outward (if applicable) - Every time you want a diferent orientation, just use the INVERT (...) (25 years ago, 8-Oct-99, to lugnet.cad.dev)
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| | Re: Clipping / CCW / CW / INVERT
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On Wed, 6 Oct 1999 18:15:40 GMT, Rui Martins <Rui.Martins@link.pt> wrote: Follow-up note: the more I look at this, the more I like using WINDING / CLIPPING instead of FACE. For reasons listed by Rui, for more flexibility, for the ability to enable (...) (25 years ago, 8-Oct-99, to lugnet.cad.dev)
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| | Re: Clipping / CCW / CW / INVERT
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(...) No, thank you! (...) I don't know if I knew you knew that, but I was almost positive you knew that. And I knew most everyone else knew that, but I wasn't sure absolutely everyone knew that. ;) (...) Right. New programs may handle transparency (...) (25 years ago, 8-Oct-99, to lugnet.cad.dev)
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