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You skinning code should look more like that: void doSkinning&#40;inout vec4 vertex, in float boneWeight&#91;&#93;&#41; &#123; vec4 pos = vec4&#40;0, 0, 0, 0&#41;; for &#40;int n = 0; n < weightCount; n++&#41; &#123; pos += &#40;BoneMatrix&#91;n&#9...

As the FINAL version of Suicide Barbie is roaming the world for some time already, it is a time to send HUGE thanks to the whole PSPDEV community for great SDK and toolchain which made this demo possible, Chip for the libGU and TyRaNiD for the psplink which were essential in development of this demo...

Modified sample demonstrating GE signals usage with libgu API.
http://rej.50megs.com/psp/libgu_signals/

Fix for signals in pspgu library. GE signals can be used with pspgu API from now on! Index&#58; callbackFin.c =================================================================== --- callbackFin.c &#40;revision 1157&#41; +++ callbackFin.c &#40;working copy&#41; @@ -10,7 +10,7 @@ v...

By "8 byte chunks", do you mean two back-to-back 32-bit writes? Doing crazy thing :) struct dfloat { float hi; float lo; }; Btw, filling VRAM with 0s sequentially gives me a 144MB/s throughput, while filling uncached system memory gives a 135Mb/s. There is some additional overhead in the ...

Do you really gain much by putting display lists/command buffers in VRAM? Mine are in main memory and i'm getting decent perf.. Oops, my fault (made a wrong assumption about GuGetMemory() function without looking into the code), the sample actually uses uncached system memory for buffers. The sampl...

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...

Couple bits about performance of this experiment: * Number of geometry batches sent to GPU slightly affects performance: 4 batches approximately 39ms per frame 64 batches approximately 41ms per frame Need more testing to detect if that is due to CPU or GPU. * Comparing performance of double-buffered...

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 ...

Hi, http://rej.50megs.com/psp/signals (back to psp coding) This experiment shows the possible usage of GU signals both for double-buffering and command-lists calls. EDIT: Sample fully using libgu API is here: http://rej.50megs.com/psp/libgu_signals/ GU signals can be used implementing double bufferi...

jsgf wrote:

ReJ wrote: 2 - ? (sampled texels seems to be uniform other the poly, but somewhat darker than pure white)

Could it be some other lighting thing? Shadows? I don't suppose there's any support for depth textures?

As it is already discovered, 2 is an environment mapping mode.

I did very simple skinning samle as well. Can be downloaded from: http://rej.50megs.com/psp/skinning/

It's not optimal, since all 8 weights are used - and it could be done with only 4 and geometry split into smaller chunks. But, hey, it's only the sample :)

I was planning on doing a skinning/morphing demo this weekend, or have you something already cooking? I did very simple skinning sample just to demonstrate how it works. Need a bit of source cleaning though (I was doing a day-job coding instead :) ). It caught my eye after I reviewed the Breakpoint...

I haven't heard of any hardware directly supporting a matrix palette the way you imagined PSP did, except possibly the Geforce6800 where you can use fp textures read in the vertex shader as matrix palettes. I meant using indices stored per vertex to address matrix in the array. That functionality w...

Well, I was actually tricked by some site stating that PSP supports only 4 weights per vertex and 8 matrices. Actually there is just 8 weights per vertex - so no need for indices and matrix palette. It should be more like: #define GU_WEIGHTS_SHIFT&#40;n&#41; &#40;&#40;n&#41;<<14&...

I've played a bit with matrix skinning: sceGuDrawArray() int vtype: bits from 14-15 seems to be a number of weights per vertex. Must be combined with GU_WEIGHT_xxx. should be something like: #define GU_WEIGHTS_SHIFT&#40;n&#41; &#40;&#40;n&#41;<<14&#41; #define GU_WEIGHTS_1 GU...

I did one more sample demonstrating simple shadowmapping using GU texture projection functionality (and rendering to offscreen buffer).

http://rej.50megs.com/psp/shadowmap/

I'll take a go at your sample and see if I can make it work the "proper" way. EDIT: Ok, sample submitted. I tweaked the code to use sceGuDrawBufferList() instead of sceGuDrawBuffer(), which removed the issues with black screen when called from within sceGuStart/sceGuFinish. I'll look into...

I've wrote another small sample demonstrating rendering to offscreen texture: http://rej.50megs.com/psp/rendertarget

Thanks :)

I did a sample showing environment mapping:
http://rej.50megs.com/psp/envmap

I've made a sample demonstrating GU environment mapping: http://rej.50megs.com/psp/envmap

arg0 = 2 seems to be envmap mode Yeah, seems to be the envmap mode. Although the envmap matrix setup is a bit strange, that's what I've figured out: The envmap matrix (2x3) is specified as a combination of 2 columns. Columns can be set using sceGuLight() [sic!] as a light position (maybe it's some ...

Hi, Recently, while playing with texture projection, I've discovered the following things: 1) sceGuEnable( 19 ) does flipping of the normal, which affects both lighting ant texture projection 2) sceGuTexMapMode( arg0, arg1, arg2 ) arg0 (0-3?): 0 - disables texture projection, enables sceGuTexOffset/...

Xvoid6f wrote:...blitting from vram -> vram. How do you set this up? Can we specify a relocatable section, and maybe have "pixels" mapped to somewhere in vram?

VRAM->VRAM: You can specify pointer to a VRAM address for sceGuTexImage() function (image source).

234 EA Texture Transfer Mode??? Bit 0: 1/0 (???) Actually, it seems to be a size of the pixel ( a0 ^ 0x03 ) 0 - 16 bit 1 - 32 bit ( GE_TPSM_5650 | GE_TPSM_5551 | GE_TPSM_4444 ) ^ 0x03 == 0 ( GE_TPSM_8888 ) ^ 0x03 == 1 Description of other registers used in sceGuCopyImage() seems to be right (178 so...