Hello everyone,
I recently started to write a program that reads BFRES files.
I am primarily using the Custom Mario Kart 8 Wiki for the specifications, but I don't know / understand a few things:
- How different are BotW files compared to MK8 files ?
The wiki only goes up to version v3.4.0.4 while BotW files are all v4.5.0.3...
Are there any major changes I should know about when reading these files ?
- How should I read the s10s ?
The FVTX sub-section of FMDL sub-files have different buffers with different types of data in them.
One of these types is "snorm_10_10_10_2", indicating that there are three 10 bit signed integers to read and 2 bits of padding always equal to 0b01...
But another source (https://github.com/Syroot/io_scene_bfres/blob/master/src/bfres_fmdl.py#L178) says that there are 3 8 bit values padded with 0b01s at each start...
None of the two meet the description of an actual piece of data found on a buffer: 0x3FC03852.
The buffer stride also does not make any sense because it is set at 20, indicating that the size of an element (our three s10 + padding) should be 20 bytes.
- Why are there multiple Texture coordinates for each vertex and so many FTEXes per FMAT ?
When reading a file, I encountered vertices that have more than one "_u0" buffer ("_u1").
I then looked at the FSHP section for these vertices to get to the FMAT being used and found 6 FTEXes referenced.
Why are there so many FTEXes ? Also, if there are 6 FTEXes referenced, shouldn't there be 6 UV coordinates per vertex ?
- What does "BC" in "GX2_SURFACE_FORMAT_T_BC1_UNORM" mean ?
There is a Texture format field in FTEX sub-files, and they are mapped to an enum called "GX2SurfaceFormat".
This enum tells how the texture data should be read.
There are a few different channels that are easy to understand like R for Red, G for Green, B for Blue, D for Depth and S for Stencil.
But there is no explanation on the "BC" channel...
If you have any information about the issues that I faced, please write a reply, as I do not know how to continue anymore (especially the "BC" part, I need to know to decode some textures in BotW)...
Thank you
I recently started to write a program that reads BFRES files.
I am primarily using the Custom Mario Kart 8 Wiki for the specifications, but I don't know / understand a few things:
- How different are BotW files compared to MK8 files ?
The wiki only goes up to version v3.4.0.4 while BotW files are all v4.5.0.3...
Are there any major changes I should know about when reading these files ?
- How should I read the s10s ?
The FVTX sub-section of FMDL sub-files have different buffers with different types of data in them.
One of these types is "snorm_10_10_10_2", indicating that there are three 10 bit signed integers to read and 2 bits of padding always equal to 0b01...
But another source (https://github.com/Syroot/io_scene_bfres/blob/master/src/bfres_fmdl.py#L178) says that there are 3 8 bit values padded with 0b01s at each start...
None of the two meet the description of an actual piece of data found on a buffer: 0x3FC03852.
The buffer stride also does not make any sense because it is set at 20, indicating that the size of an element (our three s10 + padding) should be 20 bytes.
- Why are there multiple Texture coordinates for each vertex and so many FTEXes per FMAT ?
When reading a file, I encountered vertices that have more than one "_u0" buffer ("_u1").
I then looked at the FSHP section for these vertices to get to the FMAT being used and found 6 FTEXes referenced.
Why are there so many FTEXes ? Also, if there are 6 FTEXes referenced, shouldn't there be 6 UV coordinates per vertex ?
- What does "BC" in "GX2_SURFACE_FORMAT_T_BC1_UNORM" mean ?
There is a Texture format field in FTEX sub-files, and they are mapped to an enum called "GX2SurfaceFormat".
This enum tells how the texture data should be read.
There are a few different channels that are easy to understand like R for Red, G for Green, B for Blue, D for Depth and S for Stencil.
But there is no explanation on the "BC" channel...
If you have any information about the issues that I faced, please write a reply, as I do not know how to continue anymore (especially the "BC" part, I need to know to decode some textures in BotW)...
Thank you
