Sample demonstrating simultaneous Morphing and Skinning

[ReJ]

Hi,


I've tried out the idea, earlier raised by chp http://forums.ps2dev.org/viewtopic.php?p=21122#21122, that both morphing and skinning can be combined on psp GPU.
And guess what?... It actually works :) Several blend targets can be first lerped together and then matrix skinning can be applied to resulting vertex. Here is the sample demonstrating the technique in action:
http://rej.50megs.com/psp/morphskin

This feature enables usage of sophisticated animation of texture coords, vertex color animation, geometry morph-targets along with skinning. As well some matrix skinning problems can be fixed (like elbows) using patches with applied morph targets - if anyone ever would care about that on psp ;)

[jsgf]

I've tried out the idea, earlier raised by chp http://forums.ps2dev.org/viewtopic.php?p=21122#21122, that both morphing and skinning can be combined on psp GPU.
And guess what?... It actually works :)

Cool, I've been meaning to try this out. Do all the vertex attributes get interpolated by morping? Hm, I see at least vertex and colour; I guess texcoords, weights and normals too.

But, oof, the performance seems slow. Must really be hitting the GE hard.

[ReJ]

I've tried out the idea, earlier raised by chp http://forums.ps2dev.org/viewtopic.php?p=21122#21122, that both morphing and skinning can be combined on psp GPU.
And guess what?... It actually works :)

Cool, I've been meaning to try this out. Do all the vertex attributes get interpolated by morping? Hm, I see at least vertex and colour; I guess texcoords, weights and normals too.

Yes, all vertex attributes are interpolated by morphing.

But, oof, the performance seems slow. Must really be hitting the GE hard.

It is 9216 vertices, 2 morph targets and 8 bones per vertex. And vertices in the sample are huge - 68bytes. Lots of work for GE.

I'll do a bit of performance testing with different number of bones and morph targets later on.