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Author
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Topic: Some question on OPS
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Robert
Pilot
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posted 04-20- 07:19 AM
   
Hi!Iīm currently importing objects to the P38 and is really just trying to learn OPS, and I have some problems/questions. 1.When I import my wingTipLeft to OPS it shows up in a strange way. I donīt really know how to put it, but letīs say itīs very onesided. That is the leading edge isnīt visible from straight ahead for example. But from other directions it is. I havenīt had the same problems with the wingTipRight so Iīm a bit puzzled because The wingTipLeft is originally, in 3DStudioMax a clone of the wingTipR. So why doesnīt it show up in the same way? 2. Iīm also experiencing some trouble with the DOFīs. They simply disappear sometimes, so I constantly have to check that theyīre still there before carrying on. I guess you can add DOFīs but thatīs not something I know how to do. Has anyone else experienced this, do you know any way to avoid it? Please let me know if you do. Grateful for any help/Robert IP: Logged |
jedi
Pilot
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posted 04-20- 08:21 AM
In the 3-D programs, any time you clone an object, you have a good chance of messing up the "normals" that determine which surfaces face "out" and which face "in." If the object is set to be "one-sided" with the normals facing "in," the object will be invisible from the outside. Unfortunately, I'm an AC3D guy so I don't know what you do in Max to correct it, but if you took your left wingtip and ROTATED it instead of "flipping" or "mirroring" it, and then just reshaped the wing to be the right side instead of the left, it should work OK (but it's a lot more work that way)  As for the DOFs, sometimes the PICTURE of them disappears, but they're still there. Just select the camera mode, click on a different part, click on the first part again, select DOF, and it should reappear. Sometimes you just need to "reset" the object that OPS is "focused on" to get all the properties to show up again. What you should NOT do is use the "undo" feature when you make a mistake with a DOF. This will usually REMOVE the DOF from the model Instead, either manually fix your mistake, or take your lumps by exiting without saving and restarting OPS. Hope that helps...
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--jedi-- IP: Logged |
JT
Pilot
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posted 04-20- 08:38 AM
>1.When I import my wingTipLeft to OPS it shows up in a strange way. I donīt really know how to put it, but letīs say itīs very onesided. That is the leading edge isnīt visible from straight ahead for example. But from other directions it is.Did you create the wing by using the "Mirror" tool in Max? If so, the normals probably got inverted when you exported to OBJ. Simply select all the faces and flip the normals in Max before you export. Import it back in to Max to make sure everything went OK. [This message has been edited by JT (edited 04-20-2000).] IP: Logged |
Robert
Pilot
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posted 04-20- 10:21 AM
Thanks guys!Yes, it must have been the "mirroring", because I did what you suggested JT, and it worked.Great!
Jedi, thanks for the tips on the DOFīs. I actually think that a DOF can disappear though, because in the DOF menu it says "no dof recor..." even when I select an object I know had a DOF five seconds ago. But Iīll remember not to undo DOF movement.
I have also noticed that sometimes DOF changes arenīt saved properly, but perhaps itīs me doing something wrong, I really have just started messing with OPS. BTW: are all objects in OPS by default one-sided or is it just my own objects? Many thanks to both of you/Robert IP: Logged |
jedi
Pilot
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posted 04-20- 11:10 AM
Ah, I see now. The DOF's aren't really disappearing. Sometimes OPS doesn't "show" the change you were just working on until you re-select that part, particularly using the DOF tool. You'll find that sometimes if you click on one part, bring up the DOF tool, and click on another part, it will appear not to have a DOF, and the part you were just on a second ago appears to have "lost" it's DOF as well. You need to choose another tool, click on another part, click on the first part again, and then choose the DOF tool again to see it. You can reassure yourself by bringing up the DOF TAB on the right side of OPS. If you select the camera tool, and click on the parts of the plane with the DOF tab visible on the right, you'll see all the DOF data displayed. This data for some reason isn't always visible while using the DOF tool itself.You're right on the "not saving DOF" stuff tho. Sometimes you'll see a DOF "flick" back to the way it was right before you THOUGHT you changed it. If it does this, change it back, SAVE, exit OPS, and restart. See if the changes took. If not, you may be stuck with manually editing the .sm file, which is...a whole 'nuther thing  Make sure you have OPS 1.2.1--it seems to work pretty reliably on most things.
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--jedi-- IP: Logged |
JT
Pilot
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posted 04-20- 11:24 AM
>BTW: are all objects in OPS by default one-sided or is it just my own objects?Yes, by default they should be one-sided. You can, however, make any polygon double-sided by giving it a polyflag of 80 in the LOD file. In general, don't do this unless you need the polygon to be double-sided. The texture will be mirrored on both sides of the polygon, so this is not always the best approach. You may need to actually model another side to a poly if you want the two sides to have different textures or different mapping from each other. By the way, setting polys double-sided doesn't seem to work for transparent polys... you need to model both sides in that case. IP: Logged |
Laika 801
Pilot
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posted 04-20- 01:15 PM
Changing polyflags in the LOD file - maybe you could need some more infos:
* read (and print out) SVīs tutorial ("About LODs" )
* make sure to use björns version of hippieīs extractor if you want to keep your obProb settings (if you got any) * extract the sm file * search the name.asc file for the part wich you want to change - notice the lod number(s) * open the LOD(s) in notepad * find the poly(s) you want to change (sometimes it is usefull to give polys in larger objects (many polys) a significant color like red or blue - then it is easier in the lod file to find the polys you want to change, i.e. the "glass-polys" in a canopy etc.) * read the OP-Specification Page 7, where the bit field of the polyflag is explained * convert your binary value to hexadecimal format (10010000 is 90 in Hex = 2-sided poly, primary axis z) and enter it in the right position * save the lod, rebuild the sm file and test if it works
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