Vladimír Vondruš mosra

Git pre-push hook

It will check if current branch is master, then ask a confirmation, in case of master branch

Articles with initial info: https://dev.ghost.org/prevent-master-push/, https://coderwall.com/p/jp7d5q/create-a-global-git-commit-hook

Demo

http://imgur.com/a/EXGAW

Hyperlinks (a.k.a. HTML-like anchors) in terminal emulators

[ Update 2025-03-24: Commenting is disabled permanently. Previous comments are archived at web.archive.org. ]

Most of the terminal emulators auto-detect when a URL appears onscreen and allow to conveniently open them (e.g. via Ctrl+click or Cmd+click, or the right click menu).

It was, however, not possible until now for arbitrary text to point to URLs, just as on webpages.

High-Performance Matrix Multiplication

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).

Intro

Matrix multiplication is a mathematical operation that defines the product of

This document has a more accessible location, here:

http://nickporcino.com/posts/last_mile_interchange.html

I'll maintain a copy here too, this is a nice place to support discussion.

Introduction

Multi-dimensional array views for systems programmers

As C programmers, most of us think of pointer arithmetic for multi-dimensional arrays in a nested way:

The address for a 1-dimensional array is base + x. The address for a 2-dimensional array is base + x + y*x_size for row-major layout and base + y + x*y_size for column-major layout. The address for a 3-dimensional array is base + x + (y + z*y_size)*x_size for row-column-major layout. And so on.

Pong

With Magnum and EnTT. An adaptation of ecs_pong which is example material for Flecs, another ECS framework, developed as a learning exercise of both Magnum, EnTT and ECS in general. Runs at a solid 60 fps, can you believe it?

There are NOTE markings left in the code to highlight various differences and things I struggled with and would have liked to have done.

	/*This is free and unencumbered software released into the public domain.

	Anyone is free to copy, modify, publish, use, compile, sell, or
	distribute this software, either in source code form or as a compiled
	binary, for any purpose, commercial or non-commercial, and by any
	means.

	In jurisdictions that recognize copyright laws, the author or authors
	of this software dedicate any and all copyright interest in the
	software to the public domain. We make this dedication for the benefit

	Interesting libraries I might like to use in a project...

	Asset loading:
	assetsys.h - virtual filesystem with ZIP backing, overlaying, etc https://github.com/mattiasgustavsson/libs/blob/master/docs/assetsys.md
	cute_filewatch.h - file modification watching, for runtime reloading etc https://github.com/RandyGaul/cute_headers/blob/master/cute_filewatch.h
	flatbuffers - data serialization, zero-copy deserialization, extensible schemas https://github.com/google/flatbuffers
	stb_image - https://github.com/nothings/stb/blob/master/stb_image.h
	tinyexr - https://github.com/syoyo/tinyexr
	tinygltf - https://github.com/syoyo/tinygltf
	tinyobjloader - https://github.com/syoyo/tinyobjloader

	cmake_minimum_required(VERSION 3.1)

	project(ECSY1)

	# Add module path in case this is project root
	if(PROJECT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
	set(CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/../../modules/" ${CMAKE_MODULE_PATH})
	endif()

	find_package(Magnum REQUIRED

	cmake_minimum_required(VERSION 3.1)

	project(pong)

	# Add module path in case this is project root
	if(PROJECT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
	set(CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/../../modules/" ${CMAKE_MODULE_PATH})
	endif()

	find_package(Magnum REQUIRED