| // Named tuple for C++ | |
| // Example code from http://vitiy.info/ | |
| // Written by Victor Laskin (victor.laskin@gmail.com) | |
| // Parts of code were taken from: https://gist.github.com/Manu343726/081512c43814d098fe4b | |
| namespace foonathan { | |
| namespace string_id { | |
| namespace detail | |
| { |
This is a short post that explains how to write a high-performance matrix multiplication program on modern processors. In this tutorial I will use a single core of the Skylake-client CPU with AVX2, but the principles in this post also apply to other processors with different instruction sets (such as AVX512).
Matrix multiplication is a mathematical operation that defines the product of
| In shader programming, you often run into a problem where you want to iterate an array in memory over all pixels in a compute shader | |
| group (tile). Tiled deferred lighting is the most common case. 8x8 tile loops over a light list culled for that tile. | |
| Simplified HLSL code looks like this: | |
| Buffer<float4> lightDatas; | |
| Texture2D<uint2> lightStartCounts; | |
| RWTexture2D<float4> output; | |
| [numthreads(8, 8, 1)] |
(This is a translation of the original article in Japanese by moratorium08.)
(UPDATE (22/3/2019): Added some corrections provided by the original author.)
Writing your own OS to run on a handmade CPU is a pretty ambitious project, but I've managed to get it working pretty well so I'm going to write some notes about how I did it.
| struct vec3f {float x, y, z;}; | |
| struct vec4f {float x, y, z, w;}; | |
| struct mat44f {vec4f x, y, z, w;}; | |
| //============================================================================ | |
| // sphere_screen_extents | |
| //============================================================================ | |
| // Calculates the exact screen extents xyzw=[left, bottom, right, top] in | |
| // normalized screen coordinates [-1, 1] for a sphere in view space. For | |
| // performance, the projection matrix (v2p) is assumed to be setup so that |
A. Schneider, "Real-Time Volumetric Cloudscapes," in GPU Pro 7: Advanced Rendering Techniques, 2016, pp. 97-127. (Follow up presentations here, and here.)
S. Hillaire, "Physically Based Sky, Atmosphere and Cloud Rendering in Frostbite" in Physically Based Shading in Theory and Practice course, SIGGRAPH 2016. [video] [course notes] [scatter integral shadertoy]
[R. Högfeldt, "Convincing Cloud Rendering – An Implementation of Real-Time Dynamic Volumetric Clouds in Frostbite"](https://odr.chalmers.se/hand
