 | | Re: LDraw File Format Spec 1.0 DRAFT - MATRIX section updated
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(...) I think it's fine although I do have one fairly minor nitpick. I'd rather the top and bottom of the large 'brackets' be done using / and \ as follows / a b c x \ | d e f y | | g h i z | \ 0 0 0 1 / to avoid confusion with determinates which (...) (17 years ago, 10-Sep-07, to lugnet.cad)
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| | Re: LDraw File Format Spec 1.0 DRAFT - MATRIX section updated
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(...) Works for me. --Travis (17 years ago, 11-Sep-07, to lugnet.cad)
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| | Re: LDraw File Format Spec 1.0 DRAFT - MATRIX section updated
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(...) Hey, could you perhaps toss in the word "homogeneous" when describing that matrix? I tend to find more complete explanations when I add that to my internet searches. Have fun, Don (17 years ago, 11-Sep-07, to lugnet.cad)
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| | Re: LDraw File Format Spec 1.0 DRAFT - MATRIX section updated
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(...) Before I do that, can someone tell me if a 3D transformation matrix that includes shear is still homogeneous? If not, then I'm not going to put it in. --Travis (17 years ago, 11-Sep-07, to lugnet.cad)
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| | Re: LDraw File Format Spec 1.0 DRAFT - MATRIX section updated
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(...) Yes, the matrix is still homogeneous. In fact this page contains a nifty explanation of how what we normally think of as a translation matrix is actually a shear matrix where the extra w dimension added to make things homogeneous is the fixed (...) (17 years ago, 11-Sep-07, to lugnet.cad)
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| | Re: LDraw File Format Spec 1.0 DRAFT - MATRIX section updated
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(...) OK, I updated the first "4x4 3D transformation matrix" to now be "4x4 homogeneous transformation matrix". I didn't feel that leaving 3D in there somewhere was practical. Because of this, I intentionally left the text alone two sentences later, (...) (17 years ago, 11-Sep-07, to lugnet.cad)
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