Hey everyone, I just ported a piece of software that I wrote to the DC and encountered some issues I had to workaround. It was much less painful than I expected, though (great job!). I'm not too familiar with KOS internals so I'm not sure how to best patch these or whether the changes are wanted. GC...

Hey, The VQ compression ratio is fixed at 1/8th of the uncompressed size, plus a 2kB overhead for the codebook. Any texture format supported by the PVR2DC can also utilize VQ compression. So in the end, the compressed sizes are: (num_pixels / 4 + 2048) for 16BPP images (RGB565, ARGB1555, ARGB4444, ...

I think you should find a good balance. In general the fill rate is not a problem on the DC, but memory consumption for geometry is. Fill rate is a problem on the GCN and PS2 because they use rasterizer graphic pipelines, unlike the DC which uses a deferred tiled renderer (a raycaster), but they hav...

The PVR in particular can only help with that using Gouraud shading, bump maps and texture compression. Bump maps can make planes look as if they had 3D detail. In general good texture work becomes more important than before. You could also perform ray tracing in software to get perfectly round shap...

Hey everyone, I just tried to find out how much of an advantage VQ compressed textures give over uncompressed textures in VRAM and on disc. Just sharing my findings here, in case anybody else wondered. What I did: 1. Downloaded a mesh from Dead or Alive 4 of the character Kokoro. 2. Converted the DD...

Just added support for rendering polygons with compressed textures or colors to my libgl15.

Code is here: https://bitbucket.org/bogglez/libgl15/s ... ?at=master

Try going back to the current revision, but doing a "make clean" on all of KOS, libgl, and your code, then rebuilding each (in the same order, of course). I have a feeling that one of those was not re-built after commit b38b50, which added stuff to the pvr_poly_cxt_t structure (which coul...

Seems to be caused by

That's an error in lxdream it seems: https://bitbucket.org/bogglez/lxdream/src/f9f8ef16e1c15d5dc90357cb955740ef8c32e491/src/pvr2/glrender.c?at=master#cl-205 int srcblend = POLY2_SRC_BLEND(poly2); int destblend = POLY2_DEST_BLEND(poly2); glBlendFunc( srcblend, destblend ); if( POLY2_SRC_BLEND_TARGET(...

I'm not sure whether it was part of the Katana SDK or separate, but there seems to have been some kind of 3DS Max exporter plugin for the Sega Ninja mesh format that was used on the Dreamcast?
That said, you can always write your own exporter for Blender and use that.

cube_b3 wrote:If you have a look at the cancelled games that were intended for DC such as Virtua Fighter 4 that graphics were supposed to get much better.

Virtua Fighter 4 was just developed for the Naomi though I think, which has much more horsepower than the DC?

Maybe that's because of the port from the Saturn.. I think the meshes in Dead or Alive 2 look better for example. I don't believe the Dreamcast was pushed after such a short run. The Playstation 2 Developers had many more generations of games. I saw a presentation by the developer house Naughty Dog ...

Yes, that's incredibly silly.

So Dreso741, when will we be able to try out your lib ? Best Regards. I hope to go into an open testing phase of the graphics module by christmas, but I could always use help with testing, documentation, etc. If you're interested in that PM me and I'll get back to you. Why not create a repo and let...

I'm not sure whether those numbers are accurate, but in general something else may be the bottleneck. Think transformation, culling, shading, texture lookups, ...

bogglez- Good idea to add support for run-time vq-compression ( I don't think this has been implemented in KOS yet? ), and supporting glCompressedTexImage2D. I would like to add that ability to KOS, and then implement into GL. Right now my time is very scarce, but I add that to my queue of things t...

Bump mapping, shadows and fog are supported.

Concerning compressed textures: Ph3nom, I realized you added defines for VQ_*_REV textures (BGR instead of RGB, right?). But as far as I know the PVR does not support those. I think those defines should be removed? Also, what about implementing glCompressedTexImage2D? The difference to glTexImage2D ...

http://yam.20to4.net/dreamcast/hints/index.html This is some of what I'm using for information for math. Beware, the cache section on that website seems to be wrong. It claims that the DC CPU uses a direct mapped cache, but that conflicts with what I read in the CPU manual. Not too sure about this,...

I still don't know what you actually want. You said you have no interest in KOS so you don't want to point out concrete issues or provide patches. Yet you constantly make very vague statements (e.g. "there are some errors in the documentation"). You tell everybody to just use the official ...