IES light format: Specification and reader
During my investigation on supporting IES lights for the Frostbite engine (With the help of Rodney Huff!) I have met several hurdles. The IES format is rather badly specified and when implementing a parser, many questions come without answer (And handling the different sysmetry is insane). This post is about helping people to find their way to support IES lights in their engine. And I will say tha
CGArena : Understanding IES Lights
IES stands for Illuminating Engineering Society. IES standard file format was created for the electronic transfer of photometric data over the web. It has been widely used by many lighting manufacturers and is one of the industry standards in photometric data distribution. An IES file is basically the measurement of distribution of light (intensity) stored in ASCII format. You can think of it as a
IES light profile (IES ライトプãƒãƒ•ã‚¡ã‚¤ãƒ«) ã®æƒ…å ±ã«ã¤ã„㦠- OLD hanecci’s blog : æ—§ ã¯ãã£ã¡ãƒ–ãƒã‚°
æ¦‚è¦ ã“ã®è¨˜äº‹ã§ã¯ç…§æ˜Žå™¨å…·ã®ç…§åº¦ãƒ‡ãƒ¼ã‚¿ã§ã‚ã‚‹ IES light profile ã«é–¢ã™ã‚‹æƒ…å ±ã«ã¤ã„ã¦å°‘ã—ã¾ã¨ã‚ã¦ã¿ã‚ˆã†ã¨æ€ã„ã¾ã™. IES light profile を使ã£ãŸã‚²ãƒ¼ãƒ ã§ã®ãƒ©ã‚¤ãƒ†ã‚£ãƒ³ã‚°ã¯ PS4 "Killzone : Shadow Fall" ã®ç‰©ç†ãƒ™ãƒ¼ã‚¹ãªã‚¨ãƒªã‚¢ãƒ©ã‚¤ãƒ†ã‚£ãƒ³ã‚°(http://d.hatena.ne.jp/hanecci/20130520 )ã‚„ Unreal Engine 4 ã®ãƒ©ã‚¤ãƒ†ã‚£ãƒ³ã‚°(http://d.hatena.ne.jp/hanecci/20130719 )ã§æŽ¡ç”¨ã•ã‚Œã¦ã„ã¾ã™. IES light profile ã¨ã¯ ? IES light profile ã¯ç…§æ˜Žå™¨å…·(ライト)ã®ç…§åº¦ãƒ‡ãƒ¼ã‚¿ã§, 照明器具ãŒå…‰ã‚’放射ã™ã‚‹ã¨ãã®å„æ–¹å‘ã®ã‚«ãƒ³ãƒ‡ãƒ©å€¤ã®åˆ†å¸ƒã‚’表ã—ã¦ã„ã¾ã™. ã“ã®ãƒ•ã‚¡ã‚¤ãƒ«ã¯ç…§æ˜Žå™¨å…·ã®ãƒ¡ãƒ¼ã‚«ãƒ¼ã‚„有志ã®æ–¹ã€…㌠Web 上ã§å…¬é–‹ã—ã¦ã„ã¾ã™. I
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