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Article #681Help with Solar/Lunar Cycles in a game
From: Floyd Moore
Date: Fri, 11 Sep 1992 15:54
Date: Fri, 11 Sep 1992 15:54
26 lines
1451 bytes
1451 bytes
Hello, I am trying to design some routines for a game system (ok actually it is a MOO - Mud varient) that handles some things having to do with solar and lunar cycles. My problem is that I need a relatively simple (trig functions are fine) function that will compute the location of the sun in the sky (approx is ok, like just the vertical angle above the horizon given the time of day and the locations latitute). The same question also applied to lunar cycles is needed also (what phase is the moon and where in the sky is it at this time). Note that I am not trying to develop precise algorithms for the position, but I also want something a little beter then a simple gamma*sin(theta + phi) function. Does anyone have a good reference on this type of modeling, or better yet have a sample routine in some high level language (ie C, pascal, etc) that could be used in this situation. Any help would be appreciated. ----- Floyd Moore red@fc.hp.com Entry Systems Operation Hewlett Packard Co. Fort Collins, Colorado
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From: red@hpfcso.FC.HP.COM (Floyd Moore) Date: Fri, 11 Sep 1992 15:54:04 GMT Subject: Help with Solar/Lunar Cycles in a game Message-ID: <9850007@hpfcso.FC.HP.COM> Organization: Hewlett-Packard, Fort Collins, CO, USA Path: arc1-ca.pugleaf.net!sparky!uunet!usc!sdd.hp.com!scd.hp.com!hplextra!hpfcso!red Newsgroups: rec.games.programmer Lines: 26