Accurate realtime sky color simulation in Javascript.

For a demo, see https://elonen.github.io/js-sky-sim/sky-sim.html

(If it stays blank, try downloading the HTML and viewing locally. Web security rules like CORS may block the live version.)

Based on

• "Real-Time Sky Color with Effect of Sun's Position" by Kolivand & Sunar (2011)
• "A Practical Analytic Model for Daylight" by Preetham et al (1999)
• "Simulating a day's sky" by Nico Schertler ( https://nicoschertler.wordpress.com/2013/04/03/simulating-a-days-sky/ )