 | | Re: 3D Transformations Architecture Question
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(...) Sorry. I guess I didn't fully understand why you wanted to do the pre-multiplies. Hopefully this reply will be closer to what you are looking for. LDView 1.0 did exactly what you suggest. It calculated the final coordinates for every single (...) (17 years ago, 13-Jul-07, to lugnet.cad, FTX)
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| | Re: 3D Transformations Architecture Question
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(...) Travis, Thanks, but that answer is exactly what I was trying to avoid in this discussion. I understand about creating a transformation matrix, a camera matrix and a projection/perspective matrix. I understand about compositing them all for a (...) (17 years ago, 13-Jul-07, to lugnet.cad, FTX)
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| | Re: 3D Transformations Architecture Question
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(...) Actually, based on what you write after the above, this is a "How do you draw in 3D?" question, which is fairly close to "How do you do 3D?". The implementation details of how 3D gets drawn to the screen tend to answer all your questions. When (...) (17 years ago, 13-Jul-07, to lugnet.cad, FTX)
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| | Re: 3D Transformations Architecture Question
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Basically you keep 1 copy of the object with its vertices in their original position (local or model space). You take the local to world, world to view, view to projection and projection to viewport matrices and multiply them to get a single (...) (17 years ago, 13-Jul-07, to lugnet.cad)
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| | Re: Search path question
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(...) The way I understand the file handeling system, this should not load. Because every file's references must be handled relative from the file being loaded (not to the main file). So calling sub/sub2.ldr from sub/sub1.ldr will look at (...) (17 years ago, 13-Jul-07, to lugnet.cad.dev)
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| | Re: Search path question
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(...) I would also lean towards always requiring the subdirectory, but am open to argument the other way. ROSCO (17 years ago, 12-Jul-07, to lugnet.cad.dev)
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| | 3D Transformations Architecture Question
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Feedback from the guys who built the viewers (LDGlite, LDView, etc) would be really great on this. I have a project, not Lego, but similar and I'm writing some software for 3D viewing and manipulation of items. The LDraw architecture is a good match (...) (17 years ago, 12-Jul-07, to lugnet.cad)
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| | Re: Search path question
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(...) I know that LPub would only know where to find sub2 if it was specified as sub/sub2.ldr. I think if there only being only one current working directory which is the directory where you've placed your top level model file. (...) This seems the (...) (17 years ago, 12-Jul-07, to lugnet.cad.dev)
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| | Search path question
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I just noticed some unexpected behavior in LDView, and I wanted to ask here whether or not the behavior was right. Suppose you have the following files: TestModel.ldr Sub/Sub1.ldr Sub/Sub2.ldr TestModel.ldr contains a reference to Sub/Sub1.ldr. When (...) (17 years ago, 12-Jul-07, to lugnet.cad.dev)
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| | Re: LDD goes Technic
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(...) I must say they chose a very creative solution to the issue of how to run cables :) (so as not to tease, each end of a cable is represented by the modular connector and a small length of wire. Colored arrows are used to match up which end runs (...) (17 years ago, 11-Jul-07, to lugnet.general, lugnet.cad)
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