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Author
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Topic: Horribly Complex DOF or is there another way?
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wakeup tailgunner
Pilot
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posted 01-09- 06:31 AM
   
Well....I need some advice here!For those who didn't know, the bomb-bay doors on the earlier B24's were a little bit different to most. In order to avoid drag when open, they didn't use doors, but instead had a rolling shutter! This gives me a bit of a problem modelling!!!!!!!!! At present, I am building it with doors, opening like any other, but I know this is wrong for the B24D I am building. So, how do I do this? I though of having a whole chain of DOF's activated one after another to move the whole thing out of the way, or to make it into sections and move each one. The only other option I could think of would involve hiding / unhiding when the doors open. Can this be done? IP: Logged |
ArgonV
Pilot
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posted 01-09- 07:43 AM
Hmm... Theres really no easy way. You have to either have the door move back and then rotate, move back and then rotate, move back and then rotate... (Same thing with many sections too.) or do it the hiding way like you suggested. If you do it the hiding way, all you really have to mess with is the syntax.IP: Logged |
jedi
Pilot
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posted 01-09- 10:46 AM
Well, it's gonna be complex no matter how you do it, but here's what I'd do...Make your doors "segmented," with the "parent" part of the door the large piece that moves up the side of the plane. Have the side door and the "curved" part be made up of about 3 segments each, and the "bottom" part made up of about 3. Make each segment a "child" of the preceding segment. Now comes the timing nightmare...  Initially, have the bottom segments retract INTO each other, i.e. have each one slide into the same space as its parent. This will produce an opening hole in the bottom of the plane. You can have a "fake" side door that slides "up" to make it look like the whole door is moving (this one probably has to disappear). When your bottom segments have slid into each other, the "curve" segments will have to both slide and rotate, using two simultaneous DOFs, until they've slid "into" each other, and are finally positioned "vertically" at the bottom of the side door. Then the side door itself moves "up" with the segments sliding into each other, and you're done. Easy! You could probably do it without the "sliding into each other" part if you break the door into about 20 segments, but the DOFs for that would be pretty daunting...
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--jedi-- IP: Logged |
wakeup tailgunner
Pilot
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posted 01-09- 11:20 AM
hmmmmmm.....that was pretty much what I thought... Still, it has to be done! each door can break down into 4 polys. if I rotate it to line up with the next piece, then slide it up, then rotate the next, slide the next, rotate the next slide the next, then the final chunk can slide up into the fuse..... It won't be perfect, but to do that would involve lots more polys, lots of dof's and an awful lot of tranquilisers.... IP: Logged |
Rendsburger
Pilot
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posted 01-09- 04:11 PM
Hmm, my idea is to put the centre of the DOF at a great distance, like a great circle. This will work more like translation then rotating and you donīt need to break the door to segments. This will be the easiest way.Rendsburger IP: Logged |
wakeup tailgunner
Pilot
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posted 01-10- 04:41 AM
I see what you mean Rendsburger, but I tried that and it looks odd. Trouble is, the doors on the B24 are very large. They run quite a way up the fuse. Late model B24's in all the pics I have, use conventional bomb doors. They are a lot smaller. When the door rotates up, it sticks out of the fuselage. From far away, you won't see it, but closer up, you definitely can! I could combine a few dofs and probably get something to work, but I want to try the best looking option first. At least that way, if someone says 'your B24 bomb bay doors are wrong... then I can demonstrate that I tried! IP: Logged | |
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