 | | Re: Unusual View matrices in LDRAW.INI
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(...) LDAO writes those entries to ldraw.ini. I'm not sure if any other programs update that section or not. The "Oblique" view is the default view for LDraw, and was also used for LDLite (I think) and L3Lab. "UpsideDown" is derived from "Oblique". (...) (24 years ago, 4-Oct-00, to lugnet.cad.dev)
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| | Re: Unusual View matrices in LDRAW.INI
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OK now we're getting somewhere. Thanks for providing the exact mathematical representations of those numbers. Now I'm gonna have to figure out how you calculated them. :-) (I just had the computer do the work and print out the decimal (...) (24 years ago, 4-Oct-00, to lugnet.cad.dev)
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| | Re: Unusual View matrices in LDRAW.INI
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I believe the matrix happens to produce a standard isometric view, but doesn't do so in the traditional 3D graphics way of rotation. This means that in addition to not looking right after rotation, it also doens't produce correct results when you (...) (24 years ago, 4-Oct-00, to lugnet.cad.dev)
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| | Re: part skins (was Re: some thoughts on ldraw parts)
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(...) It's not always this easy. Some parts just cannot be constructed out of the primitives - or the scaling/transformation is just too difficult to figure out. Examples are those with complex curves (like the wizard's hat), or complex (...) (24 years ago, 4-Oct-00, to lugnet.cad.dev)
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| | Re: Unusual View matrices in LDRAW.INI
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(...) I don't know their origin, but you're right, there's a shear component in them. Here's what a matrix decomposition shows: (...) Scale : (1.5, 0.942809, 1.41421, 0) Rotate : (0.321751, 0.729728, 0.463648, 0) Translate : (0, 0, 0, 0) Shear : (...) (24 years ago, 4-Oct-00, to lugnet.cad.dev)
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