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@mjackson
mjackson / color-conversion-algorithms.js
Last active June 8, 2024 01:27
RGB, HSV, and HSL color conversion algorithms in JavaScript
/**
* Converts an RGB color value to HSL. Conversion formula
* adapted from http://en.wikipedia.org/wiki/HSL_color_space.
* Assumes r, g, and b are contained in the set [0, 255] and
* returns h, s, and l in the set [0, 1].
*
* @param Number r The red color value
* @param Number g The green color value
* @param Number b The blue color value
* @return Array The HSL representation
@astarasikov
astarasikov / gist:7794123
Created December 4, 2013 19:38
minimalistic OpenGL window in Objective-C
#import <Foundation/Foundation.h>
#import <Cocoa/Cocoa.h>
#import <CoreVideo/CVDisplayLink.h>
@interface SxgeView : NSOpenGLView <NSWindowDelegate>
-(void)registerDisplayLink;
-(void)renderForTime:(CVTimeStamp)time;
-(void)windowWillClose:(NSNotification*)note;
@XVilka
XVilka / TrueColour.md
Last active June 10, 2024 17:21
True Colour (16 million colours) support in various terminal applications and terminals

THIS GIST WAS MOVED TO TERMSTANDARD/COLORS REPOSITORY.

PLEASE ASK YOUR QUESTIONS OR ADD ANY SUGGESTIONS AS A REPOSITORY ISSUES OR PULL REQUESTS INSTEAD!

@tomaes
tomaes / raster-fari
Created March 22, 2014 18:11
16 bytes for a fairly nice looking (and flicker free) static raster effect (c64)
* = $7c ; zeropage boot-up (for VICE)
sei ; no interupts, no flickering
sty $d011 ; background frame is now everywhere
cpy $d012 ; wait for next raster line
bne *-3 ;
sty $d020 ; set fullscreen color
iny ; wait 2 lines (looks best)
iny ;
bvc *-10 ; loop quickly
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <fcntl.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
@myusuf3
myusuf3 / delete_git_submodule.md
Created November 3, 2014 17:36
How effectively delete a git submodule.

To remove a submodule you need to:

  • Delete the relevant section from the .gitmodules file.
  • Stage the .gitmodules changes git add .gitmodules
  • Delete the relevant section from .git/config.
  • Run git rm --cached path_to_submodule (no trailing slash).
  • Run rm -rf .git/modules/path_to_submodule (no trailing slash).
  • Commit git commit -m "Removed submodule "
  • Delete the now untracked submodule files rm -rf path_to_submodule
@roachhd
roachhd / README.md
Last active June 25, 2024 10:06
Basics of BrainFuck

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BrainFuck Programming Tutorial by: Katie

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

INTRODUCTION

@bkaradzic
bkaradzic / orthodoxc++.md
Last active June 26, 2024 17:24
Orthodox C++

Orthodox C++

What is Orthodox C++?

Orthodox C++ (sometimes referred as C+) is minimal subset of C++ that improves C, but avoids all unnecessary things from so called Modern C++. It's exactly opposite of what Modern C++ suppose to be.

Why not Modern C++?

Get/set ID3 meta tags using ffmpeg

A quick guide on how to read/write/modify ID3 metadata tags for audio / media files using ffmpeg.

FFmpeg has a free-form command line option that allows the user to specify key-value-pairs for encoding metadata. Let's take a look.

1. Read ID3 metadata

To list all global metadata tags for a media file, just set an input but no output file.

@antirez
antirez / lmdb.tcl
Created April 28, 2017 15:40
LMDB -- First version of Redis written in Tcl
# LVDB - LLOOGG Memory DB
# Copyriht (C) 2009 Salvatore Sanfilippo <antirez@gmail.com>
# All Rights Reserved
# TODO
# - cron with cleanup of timedout clients, automatic dump
# - the dump should use array startsearch to write it line by line
# and may just use gets to read element by element and load the whole state.
# - 'help','stopserver','saveandstopserver','save','load','reset','keys' commands.
# - ttl with milliseconds resolution 'ttl a 1000'. Check ttl in dump!