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Gary Williams wrote in message ... (...) No, never needed, since "0 INVERT" is a toggle! (...) Since INVERT is directly related to the CW and CCW parameters of the FACE meta-command, why not let it be yet another parameter to FACE ? I think the (...) (25 years ago, 4-Oct-99, to lugnet.cad.dev)
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| | Re: Comprehensive meta-command list
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(...) True. '0 INVERT END' may be allowed as a syntactic convenience to authors. Or 0 INVERT could be rewritten as 0 INVERT [ON|OFF|TOGGLE] where TOGGLE would be the default action. (...) [example snipped] 0 INVERT is different from 0 FACE [CW|CCW] (...) (25 years ago, 4-Oct-99, to lugnet.cad.dev)
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Lars C. Hassing wrote in message <939050465.592693@ns.cci.dk>... (...) True. But when manually examining a file, if you come across a 0 INVERT you wouldn't know whether this was the beginning or the end of the inverted references, without a bit of (...) (25 years ago, 4-Oct-99, to lugnet.cad.dev)
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| | Re: Comprehensive meta-command list
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Gary Williams wrote in message ... (...) Well, my assumption was that CCW was the default and that the current facing was passed to the subfile. Under these circumstances I think that my two examples are equivalent! But I admit that the idea that (...) (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 <939367581.966085@ns.cci.dk>... (...) In addition to being easier to comprehend, it has the advantage that each part and primitive file only has to concern itself with its own vertex order, and is not dependent on (...) (25 years ago, 8-Oct-99, to lugnet.cad.dev)
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| | Re: Comprehensive meta-command list
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Gary Williams wrote in message ... (...) "...not dependent on any other file..." Well, I hope you agree that files depend on the inside/outside-definition of subfiles? Otherwise a file wouldn't know whether or not to use the INVERT. /Lars (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: 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: Comprehensive meta-command list
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Gary Williams skrev i meddelelsen ... (...) vertices. (...) Right, a file should not bother whether subfiles use CCW or CW or none. But it should know the orientation (inside/outside-definition) of the subfiles. (...) I agree. /Lars (25 years ago, 9-Oct-99, to lugnet.cad.dev)
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