Comments for Anteru's blog

Comment on Minimal setup screen space quads: No buffers/layouts required by Anteru

Anteru — Thu, 22 Mar 2012 06:25:01 +0000

@robert: Yes, but you need to setup the geometry shader, which is more code With the approach outlined above, you have the minimum amount of overhead on the API side as well.

Comment on Minimal setup screen space quads: No buffers/layouts required by Robert

Robert — Wed, 21 Mar 2012 22:38:43 +0000

Three vertices? One point is all you need (thanks to the geometry shader : http://renderingpipeline.com/2012/03/are-vertex-shaders-obsolete/

If you’re into calculating the position:

void main()
{
    int i = 2;
    do {
        t           = vec2( ivec2(i/2,i)%2 );
        gl_Position = vec4( t*2.0 - 1.0, 0.0, 1.0 );
        EmitVertex();
    } while ( (i=(i+1)%4) != 2 );

    EndPrimitive();
}

Comment on Canonical include files for frameworks & libraries by dvide

dvide — Fri, 16 Mar 2012 18:32:09 +0000

That’s clever. I like it!

Comment on OpenCL for realtime rendering: What’s missing? by Anteru

Anteru — Sun, 11 Mar 2012 18:21:18 +0000

@Benoit: You can bind a buffer, that just works. I’m not sure if you can map an unordered access view for interop, but if, then this would provide you an easy workaround. From OpenGL, it’s just a plain buffer, which you can bind directly.

Comment on OpenCL for realtime rendering: What’s missing? by Sikkes

Sikkes — Sun, 11 Mar 2012 16:48:19 +0000

Just hit the same annoyance you are describing: “No support for reading the depth buffer”.
This is a complete show stopper for me as copying it to a PBO or any other buffer will negate most if not all performance benefits of my hierarchical-Z occlusion algorithm.

Now I’m forced to use the most hacky route of them all: build the Hi-Z through pixel shaders, use a point list and the geometry shader to cull the objects, and grab the results using transform feedback. Doh. (I can’t use DirectCompute, since I’m building a cross platform renderer)

Comment on OpenCL for realtime rendering: What’s missing? by Benoit

Benoit — Thu, 08 Mar 2012 16:04:37 +0000

With OpenCL how is it possible to do the equivalent of bind an unordered access view as output in a pixel shader (for order-independant transparency linked-lists for example)?

Comment on Minimal setup screen space quads: No buffers/layouts required by Anteru

Anteru — Sat, 03 Mar 2012 15:19:24 +0000

Ah right, just updated the post, thanks for the link. I totally missed that one on #altdevblogaday.

Comment on Minimal setup screen space quads: No buffers/layouts required by Martins

Martins — Sat, 03 Mar 2012 10:43:10 +0000

Why four vertices? You can do it with three vertices: http://altdevblogaday.com/2011/08/08/interesting-vertex-shader-trick/
And if you don’t like bitwise operations (targeting DX9/GL2) you easily convert calculations to use only mul/add/sub operations.

Comment on Changing XP from retail to OEM … by Chris B

Chris B — Fri, 17 Feb 2012 20:27:30 +0000

Thank you so much for that information it really came in handy.

Comment on Review: PVS Studio by Andrey

Andrey — Fri, 20 Jan 2012 16:35:28 +0000

Now PVS-Studio (v. 4.53) detect the error:


char s [5];
strcpy (s, "Sixchr");

Regarding speed, we also worked a lot. Now you can use Clang and speeds up the analysis. There are other ways to speed up the analysis of the project. Learn more here: Tips on speeding up PVS-Studio.