Prince of Persia 2008 vertex data

[Turfster]

Been staring myself blind on this one for far too long.
I've figured out a few of the other formats (getting somewhere with the character meshes was actually easier), but I can't put my finger on this 28 byte vertex format used for static stuff.
Following the standard "first 12 bytes are 4 32bit floats for x/y/z" the others use gives me way too many NANs to be right.
(The last 8 bytes are probably uvs like for the others tho)

It's probably blindingly obvious, but can someone else take a look at it and shine the light of understanding for me because it's driving me crazy

Anyway, attached 2 example files.

JCT4_OB1_FAKE.415D9568
vertexdata start offset 106 (528 vertices, 14784 bytes)
triangle data start offset 14890 (667 triangles, 4002 bytes)

OB_OBJ_Lamp_04.415D9568
first object
vertexdata start offset 107 (567 vertices, 15876 bytes)
triangle data start offset 16711 (538 triangles, 3348 bytes)

[fatduck]

Just have a quick look on those files!
The verts position are NOT in float format!
They should be a 16bits signed integer * scale factor
So the first 6 bytes are 3 16bits signed integer XYZ

And the last 8 bytes are definate 2 float UV value.

Right before the UV should be 4 unsigned 8bits color value, which should be Vertex Color!

A interesting value on offset 7-8(the forth 16bits signed integer) are always 3/-3 !?


Hope this help!

[Turfster]

Doh, thanks.
I'd tried with float16s, but they weren't fractional, so I'd abandoned and moved on. -_-
(really weird storage method btw, if the 4th 16 bit value is positive, you need to change the sign of the xyz values)