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Okay.... having had a day to think about it and a night to sleep on it, I think I've figured out something.... But it would only work if the optional lines were incident to edges of polygons that are part of the object being drawn. I'm not sure if (...) (20 years ago, 25-Jan-05, to lugnet.cad.dev)
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| | Re: Rendering implementation details
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(...) I'm not 100% sure, but I believe most (if not all) of these outlining algorithms expect you to know the difference between the front faces and the back faces. It could be that they could be adopted for use when you don't have this information, (...) (20 years ago, 25-Jan-05, to lugnet.cad.dev)
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| | Re: Rendering implementation details
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(...) I'm not sure it's possible to implement for real without serious slowdowns. It might be possible to implement in a vertex program, but I haven't studied vertex programs, so I really don't know. (I'm pretty sure you can't throw out a vertex (...) (20 years ago, 25-Jan-05, to lugnet.cad.dev)
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| | Re: Cross platform GUI
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(...) The look and feel is one of the reasons why I rejected GTK (...) To me, compile times are a non issue. However the non-free nature of Qt leaves a bad taste in my mouth (and I not even a Open Source zealot). I can however develop a Qt based (...) (20 years ago, 25-Jan-05, to lugnet.cad.dev, lugnet.off-topic.geek)
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| | Re: Experimenting with camera.dat and look_at.dat
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(...) It would be nice if there were also a part used to store points. It would then be declared at the end of the .pov file as a uniquely named vector. (20 years ago, 25-Jan-05, to lugnet.cad.dev)
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| | Re: Rendering implementation details
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(...) You're right about the performance hit. We've discussed this issue previously on lugnet, because quite a few of the renderers out there use opengl (ldview, leocad, ldglite, Mac Brick Cad...) Source code is available for all of these if you (...) (20 years ago, 25-Jan-05, to lugnet.cad.dev)
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| | Re: Rendering implementation details
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(...) Someone once suggested to me (Dan from Microsoft maybe?) that given today graphics libraries, one could probably get away with ignoring op-lines altogether and use edge detection. This would present a potential problem since edge color is (...) (20 years ago, 24-Jan-05, to lugnet.cad.dev)
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| | Rendering implementation details
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I was envisioning how an LDraw renderer would be implemented if it were done with OpenGL, and I've arrived at some questions that I can't answer for myself. I'm particularly wondering about line type #5, the optional line. According to the LDraw (...) (20 years ago, 24-Jan-05, to lugnet.cad.dev)
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| | Re: Experimenting with camera.dat and look_at.dat [DAT]
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(...) I updated the camera.dat and look_at.dat so they don't need to be REMmed out: 0 ~Camera Position 0 Name: Camera.dat 0 Author: Tore Eriksson 0 Un-official part 2 24 -4 0 0 4 0 0 2 24 0 -4 0 0 4 0 2 24 0 0 -4 0 0 4 0 L3P IFNOTPOV 1 0 0 25 37 1 0 (...) (20 years ago, 24-Jan-05, to lugnet.cad.dev)
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| | Re: Experimenting with camera.dat and look_at.dat
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(...) Yes,I am very well aware of the multitude of camera settings POV offers, and I haven't yet decided which way to go. The fastest way may be to run my own race using my own META statements: 0 LDA CAMERA.POSITION x y z 0 LDA CAMERA.LOOKAT x y z 0 (...) (20 years ago, 24-Jan-05, to lugnet.cad.dev, lugnet.cad.ray)
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