tag:blogger.com,1999:blog-6042417775578107106.post7688625483427932822..comments2023-08-05T11:30:32.754-04:00Comments on The Hacks of Life: Geometry Shader Performance on the 8800Chrishttp://www.blogger.com/profile/14648675681957285299noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-6042417775578107106.post-51275705131880792082010-11-08T15:32:36.270-05:002010-11-08T15:32:36.270-05:00Ok, thanks. I just had many problems regarding to ...Ok, thanks. I just had many problems regarding to some details with shaders, so I thought that it's my local problem.Unknownhttps://www.blogger.com/profile/14027636551534676991noreply@blogger.comtag:blogger.com,1999:blog-6042417775578107106.post-72068092541891075412010-11-08T11:17:04.795-05:002010-11-08T11:17:04.795-05:00If you are using an ATI card I would expect _no_ c...If you are using an ATI card I would expect _no_ consistency with the numbers I posted. You'll need to characterize GS performance for yourself on the target drivers you care about supporting in your shipping product. This is the way of OpenGL: it will work everywhere, but it's not guaranteed to be fast everywhere.<br /><br />My overall conclusion has been that GS simply aren't a terribly fast path across a wide range of hardware. But that's based on the perf my product needs on the cards and plaforms my company cares about.Benjamin Supnikhttps://www.blogger.com/profile/04886313844644521178noreply@blogger.comtag:blogger.com,1999:blog-6042417775578107106.post-82053108175018413012010-11-08T10:46:23.785-05:002010-11-08T10:46:23.785-05:00Hi, I've found this site thru google, because ...Hi, I've found this site thru google, because I've noticed a problem when using GS and your article denies it...<br /><br />When I'm using Fragment Shader and Vertex Shader (simplest - vs for vertex transformation and fs for drawing a white pixel) I can obtain 320 FPS for my heightmap. When I attach the simplest Geometry Shader then I end up with 145 FPS. Can You tell me how come "Using a geometry shader which simply passes through the geometry has no affect on fps." this is true? Can the problem lie in the fact that I have ATI card (problem with the driver) or that I use GLSL? Thanks in advance for your reply.<br /><br />PS: When I want to send normal vector from VS to FS (and unavoidably through GS) I get 124 FPS :/<br /><br />Regards.Unknownhttps://www.blogger.com/profile/14027636551534676991noreply@blogger.com