There's a high chance that this will perform worse than stencil shadows, depending on your machine setup and game setup.Evak wrote:very nice, I have to see if I can get one of our programmers to look at your shadow demo and implement something similar in our app. Will be interesting to see how well it performs compared to the ugly but fast stencils were using at the moment.
Stencil shadows are a killer if you're using them on a lot of high-poly models. Evak - I'd definitely give this a shot to compare performancenullsquared wrote:There's a high chance that this will perform worse than stencil shadows, depending on your machine setup and game setup.Evak wrote:very nice, I have to see if I can get one of our programmers to look at your shadow demo and implement something similar in our app. Will be interesting to see how well it performs compared to the ugly but fast stencils were using at the moment.
This should probably go in the discussion thread, but, I'll put it here - I have to probably update the demo to emulate bilinear filtering for AMD cards. NVidia cards support bilinear filtering on floating point textures since the 6000 series; yet, AMD, on the other hand, seems to only support it on the HD2000 series and up.bharling wrote:Fantastic Work, 10 gold stars
- have integrated it into my app and looks loverly.
on my work 8500GT its around 130 fps, on my home X1650 its about 95 fps, but doesn't look as nice as it does on the NVIDIA card ( lots of aliasing around the shadow boundaries ). I guess that issue has been covered a lot in this and related threads though! C'mon ATI - sort it out!
Both OGL and D3D seem to work on both cards.
Oh, neat. Thanks for the find! I can integrate that, no worries - there's a bit more to it than just the shaders being edited because first we want to detect whether the card is an AMD or NVidia. That's why I put the demo as 99% percent done, not 100%bharling wrote:I found this implementation of gpu bilinear filtering, will try and integrate it into your shader, I dont think it'll be too difficult.
http://www.ozone3d.net/tutorials/glsl_ ... ng_p02.php
trobule is, I'm on my NVIDIA machine a the moment, so need to wait until I get home before seeing any results ...
. I think I'm also going to fix the demo up a bit to not blow up on low end cards, and use regular shadow mapping instead.
Yep - only in Shoggoth though. RenderSystemCapabilities::getVendor is the magic function. I really wanted to put something in to detect major card generations too, but it gets really fiddly - lots of deviceIDs that aren't always sequential on D3D, and horrid text matching in GL.Praetor wrote:The GPU render caps tell you whether the card is ATI or nvidia. Shouldn't be hard to use a define or swap a shader based on that value.
And on the 2nd screenshot you can see that, I have only cubes and I got a weird round shadow corner (the ones projected on the facing cubes). I think there is a relation ...
