Alright, uh, thanks to people who messaged me, I got my hands on some... better documentation. Well, part of the SDK, in fact. That, more study of the DS parts of GBATEK and a few other tools' sources, and a lot of experimentation yielded this a few minutes ago:



It works reasonably well for EO's mostly static models (as well as ex. Mario Kart DS' courses), but everything with just a tiny bit more ex. matrix stack usage glitches out pretty badly. I am sorta motivated to improve it to also render - as examples of other stuff I tried - character models from Snowboard Kids DS and Viewtiful Joe properly, but for now it's good enough.


____________________

I know how that would work in principle - I'm more or less used to hierarchies, matrices & co. from Zelda OoT -, but I'm having trouble with the mapping. I presume it's the "structured byte code" stuff that describes the nodes, material and shape IDs, etc. and that I'm either not parsing it correctly, or that I'm not correctly using the data from it.

It's less of a problem with the dungeon models of Etrian Odyssey as there's minimal matrix stack usage, and what is there - mainly for each side of the double doors IIRC - works fine with the way I'm I suppose "faking" it right now: calculating a transformation matrix for each node, and (if the node has a parent node ID that isn't its own ID) multiplying it with the parent node's matrix, while simply ignoring each node's stack ID and restore ID. Then I just use the resulting matrix to transform each vertex.

Anything that actually uses any matrix commands in display lists (although I believe I've only come across Restore Matrix (0x14) so far, none of the others...?) does something like this, ex. from Snowboard Kids:

---

Edit: YES! YES!



...BUT! There's still things that aren't implemented or that are glitchy. Nancy's and Koyuki's models from Snowboard Kids appear to be fine, Viewtiful Joe's does too, Blaze's from Sonic Rush does (Sonic crashes the program during texture loading for some reason), but ex. Sakura's from that 3D Naruto fighter looks really awful. I think her's depends on this weighted envelope matrix stuff (or whatever...) and the NodeMix SBC command, which I'm 99% I am emulating wrongly.

---

Edit: Haven't fixed NodeMix, but at least made the glitchyness go away by just writing an identity matrix to the stack... will need to fix this if I ever want animation to work, tho, I'm guessing. Feeling reminded of my struggle with Wind Waker's actor models here...




____________________

Originally posted by E-scope12

---

What program are you using? Can you take a look at the Coraline DS Models & fix them because they don't load correctly. http://www.mediafire.com/download/hpww9vwmkb53rki/Coraline_NSBMD_Character_Models.zip

---

Late reply, to someone with a single post... who hasn't been here since a day after his only post. But whatever... no need to fix something that isn't broken (or at least not as horrible as other viewers apparently are) - ex. CorB_A.nsbmd:



I oughta release all this junk someday...


____________________

It has no real name, it's a program I've written myself, and it's one that I haven't released yet. I'll do so eventually, I guess, but it's not a priority for me right now, plus it still doesn't support animation at all and has problems with certain display list commands...


____________________

It's called "C:\Users\Daniel\Documents\Visual Studio 2010\Projects\NSBMDViewer\NSBMDViewer.sln and C:\Users\Daniel\Documents\Visual Studio 2010\Projects\NitroRender\NitroRender.sln" - AKA it does not have a name beyond the project titles (for the viewer GUI and the library that does the rendering) that Visual Studio projects require. I'll name it something else someday, but it's really not important at all right now.

As for .obj exporting, it currently can export models to a custom-ish format I'm using for another project, which of course would be pretty useless for everyone else. I'll eventually look into some other format, such as .obj.


____________________

I have actually kept working on the NSBMD viewer, or rather expanded it into a viewer for the filesystem, etc., and even posted a few newer shots in the generic screenshot thread (like this one) and on Twitter (like that one).

Neither the "old" viewer, nor the "extended" one support anything other than rendering NSBMD models, tho: no animations - outside of preliminary texture animation -, no proper model exporting, etc., so I guess it would be kinda useless in its current state for you anyway? I am planning to implement that stuff, and eventually release a build capable of ex. model exporting, but it's still a long way off, I think.

A GCN BMD/BDL viewer... is unlikely from me. I did write Wind Viewer tho, as a specialized WW/TP map editor which obviously does support BMDs/BDLs, so if anyone wants to rip out its rendering code (J3Dx.cs) and turn it into a stand-alone viewer, feel free to. See the active repository on GitHub by pho, Abahbob, etc.


____________________