Elviss Strazdins elnormous

Tutorial 0

What is Vulkan

Vulkan is a low-overhead, cross-platform 3D graphics and compute API.

Vulkan targets

Vulkan targets high-performance realtime 3D graphics applications such as games and interactive media across multiple platforms providing higher performance and lower CPU usage.

Orthodox C++

This article has been updated and is available here.

OpenVPN .ovpn manipulation.

This is how you can take an OpenVPN .ovpn config file and extract the certificates/keys required to import the profile into NetworkManager.

Download the .ovpn file. Save it somewhere you can store it permanently (I use ~/.vpn).
Copy from between <ca> tags into ca.crt, remove <ca> tags.
Copy from between <cert> tags into client.crt, remove <cert> tags.
Copy from between <key> tags into client.key, remove <key> tags.
Copy from between <tls-auth> tags into ta.key, remove <tls-auth> tags.
Remove the line "key-direction 1"
Above "# -----BEGIN RSA SIGNATURE-----" insert the following lines.

	// $ em++ -lwebsocket.js -o index.html main.cpp

	#include <emscripten/emscripten.h>
	#include <emscripten/websocket.h>
	#include <stdio.h>

	EM_BOOL onopen(int eventType, const EmscriptenWebSocketOpenEvent websocketEvent, void userData) {
	puts("onopen");

	EMSCRIPTEN_RESULT result;

	//
	// cc sdl-metal-example.m `sdl2-config --cflags --libs` -framework Metal -framework QuartzCore && ./a.out
	//
	#include <SDL.h>
	#import <Metal/Metal.h>
	#import <QuartzCore/CAMetalLayer.h>

	int main (int argc, char *args[])
	{
	SDL_SetHint(SDL_HINT_RENDER_DRIVER, "metal");

	// Just before switching jobs:
	// Add one of these.
	// Preferably into the same commit where you do a large merge.
	//
	// This started as a tweet with a joke of "C++ pro-tip: #define private public",
	// and then it quickly escalated into more and more evil suggestions.
	// I've tried to capture interesting suggestions here.
	//
	// Contributors: @r2d2rigo, @joeldevahl, @msinilo, @_Humus_,
	// @YuriyODonnell, @rygorous, @cmuratori, @mike_acton, @grumpygiant,

	Latency Comparison Numbers (~2012)
	----------------------------------
	L1 cache reference 0.5 ns
	Branch mispredict 5 ns
	L2 cache reference 7 ns 14x L1 cache
	Mutex lock/unlock 25 ns
	Main memory reference 100 ns 20x L2 cache, 200x L1 cache
	Compress 1K bytes with Zippy 3,000 ns 3 us
	Send 1K bytes over 1 Gbps network 10,000 ns 10 us
	Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD

	newmtl cube
	Ns 10.0000
	Ni 1.5000
	d 1.0000
	Tr 0.0000
	Tf 1.0000 1.0000 1.0000
	illum 2
	Ka 0.0000 0.0000 0.0000
	Kd 0.5880 0.5880 0.5880
	Ks 0.0000 0.0000 0.0000