Number of bones supported by PSP hardware

[gr8dane]

It seems the PSP hardware supports 8 weights per vertex, does anyone know the maximum number of bones supported by the hardware?

In other words, what is the maximum index supported by sceGuBoneMatrix(Index, Matrix);

Thanks in advance...

[chp]

It only supports 8 weights, so that means only 8 matrices. It's not indexed like on the PC where you can use a matrix palette.

If you need to use more than 8 bones, you'll have to slice the model up based on locality.

[gr8dane]

Thanks, that was exactly the answer I did not want to hear :-)

I'll just start crying now...

[ector]

blah, it can't take more than an afternoon to do a reasonably decent model slicer..

[gr8dane]

You are correct, a resonably decent model slicer would not take that long.

However for my purposes "resonably decent" is just not good enough, making an optimal one is a little more complicated.

[ector]

Doing a perfectly optimal model slicer sounds suspiciously like an NP-complete problem :)

You're probably better off with a more pragmatic solution...

[Produkt]

thats really weird... so the hardware seriously cannot track more than 8 bones?


a typical model without feat, head, and hand bones is 9 bones!

[gr8dane]

Most any skinned model will use more than 8 bones. You will have to split up your mesh into several sub-meshes based on what polygons are influenced by which bones and then render them seperately.

You can get around the 8 bone hardware limit this way but it's a bit of a pain the ass.

[gr8dane]

Does anybody happen to know the performance impact of feeding the hardware 8 weights versus 2 weights?