Calculating ATAN2
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12-03-2022, 03:43 AM
Post: #7
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RE: Calculating ATAN2
How about using acos for atan2(y,x) ?
This covered edges cases, except for (y,x) == (0,0) Code: function sign(y) return signbit(y) and -1 or 1 end lua> function test(y,x) return atan2(y,x), myatan2(y,x) end lua> test(4,3) --> 0.9272952180016122 0.9272952180016123 lua> test(4,-3) --> 2.214297435588181 2.214297435588181 lua> test(-4,3) --> -0.9272952180016122 -0.9272952180016123 lua> test(-4,-3) --> -2.214297435588181 -2.214297435588181 X axis: lua> test(0, 1) --> 0 0 lua> test(0,-1) --> 3.141592653589793 3.141592653589793 Y axis: lua> test(1, 0) --> 1.5707963267948966 1.5707963267948968 lua> test(-1,0) --> -1.5707963267948966 -1.5707963267948968 |
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Messages In This Thread |
Calculating ATAN2 - Matt Agajanian - 12-02-2022, 08:41 PM
RE: Calculating ATAN2 - Maximilian Hohmann - 12-02-2022, 09:48 PM
RE: Calculating ATAN2 - Matt Agajanian - 12-02-2022, 09:57 PM
RE: Calculating ATAN2 - Thomas Klemm - 12-02-2022, 09:50 PM
RE: Calculating ATAN2 - Csaba Tizedes - 12-02-2022, 10:13 PM
RE: Calculating ATAN2 - Matt Agajanian - 12-02-2022, 11:21 PM
RE: Calculating ATAN2 - Csaba Tizedes - 12-03-2022, 07:10 AM
RE: Calculating ATAN2 - Matt Agajanian - 12-03-2022, 08:11 PM
RE: Calculating ATAN2 - Albert Chan - 12-03-2022 03:43 AM
RE: Calculating ATAN2 - Matt Agajanian - 12-03-2022, 06:47 AM
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