 | | Re: LDraw coordinate system driving me crazy
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Tim Gould wrote: > It is still a right-handed system. The handedness is unchanged by rotation (in (...) So the original designer of the LDraw program just decided to use this orientation of the right handed system. if so then it starts making more (...) (18 years ago, 19-Nov-06, to lugnet.cad.dev)
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| | Re: LDraw coordinate system driving me crazy
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(...) That looks like a correct mapping to me. Unless I'm mistaken the red and orange are on the same sides in both pictures. The unwrapped boxes are definitely identical and unless you've moved them in one or the other the whole thing is right. Tim (18 years ago, 19-Nov-06, to lugnet.cad.dev, FTX)
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| | Re: LDraw coordinate system driving me crazy
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Hi, Here's my box test model in SketchUp. (The above model is the same model unfolded.) (URL) When I export this model to a .dat and open it in LDView, the green side is the top-view, blue is the front view (as expected), and I would expect the (...) (18 years ago, 19-Nov-06, to lugnet.cad.dev, FTX)
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| | Re: LDraw coordinate system driving me crazy
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(...) In LDraw +z is backwards, not forwards or more strictly +Z points away from the camera when X is right and -Y is up. Tim (18 years ago, 19-Nov-06, to lugnet.cad.dev, FTX)
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| | Re: LDraw coordinate system driving me crazy
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(...) I've been having difficulty with importing/exporting .dat files from SketchUp. In SketchUp, if you stand at the Origin; X is right, Y is forward, and Z is up. The LDraw Primitives Reference ((URL)) says the LDraw axes are: X is right, Y is (...) (18 years ago, 19-Nov-06, to lugnet.cad.dev, FTX)
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| | Re: LDraw coordinate system driving me crazy
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(...) It is still a right-handed system. The handedness is unchanged by rotation (in ldraws case 180*x from standard). Tim (18 years ago, 19-Nov-06, to lugnet.cad.dev)
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| | Re: LDraw coordinate system driving me crazy
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As I understand it, LDraw has negative y in the up direction, which is neither right nor left handed, but something else entirely. I don't know that it has a name. James (18 years ago, 19-Nov-06, to lugnet.cad.dev)
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| | Re: LDraw coordinate system driving me crazy
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(...) I've always understood it is: X positive is right X negative is left Y Positive is bottom Y Negative is top z Positive is back z negative is front In fact you can show this by adding a brick in MLCad and moving it around, watching how the X, Y (...) (18 years ago, 19-Nov-06, to lugnet.cad.dev)
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| | LDraw coordinate system driving me crazy
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Hello all, I'm having difficulties with the ldraw coordinate system. As fas I understood it it's Right handed, just like OpenGL. So X positive is right X negative is left Y Positive is top Y Negative is bottom z Positive is front z negative is back (...) (18 years ago, 19-Nov-06, to lugnet.cad.dev)
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| | Re: Question to parts authors about BFC CERTIFY
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In lugnet.cad.dev, Travis Cobbs wrote: > So, my question is this: should I remove this warning from LDView for commands > that contain options in addition to CERTIFY and CW/CCW? I definitely think that > it's appropriate to warn when multiple (...) (18 years ago, 12-Oct-06, to lugnet.cad.dat.parts, lugnet.cad.dev)
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