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| Other Library Functions | ||||||||||
| function | atan2 |
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Library: omtrig - trigonometry
Include: omtrig.xin |
Return type: Opaque Returns: Rectangular co-ordinates. |
define external float function
atan2 (value float x, value float y)
Use atan2 with two rectangular co-ordinates, x and y, as arguments to calculate the arc tangent (y/x). atan2 gives you the degree in radians. This trigonometric function works in conjunction with hypot.
In mathematics, the arc tangent is also called the inverse tangent.
Out-of-range values, such as acos() and asin() for |x| > 1, return "not a number" (NaN).
Example:
include "omtrig.xin"
process
local float x initial {1.1}
local float y initial {0.7}
local float atan2-value
set atan2-value to atan2 (x, y)
output "Take the rectangular co-ordinates x ( = "
|| "d" % x
|| " ) and y ( = "
|| "d" % y
|| " ) %n"
|| "Their arc tangent = "
|| "d" % atan2-value
|| "%n"
; Output: "Take the rectangular co-ordinates x ( = 1.1 ) and y ( = 0.7 )"
; "Their arc tangent = 1.00406710927139"
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Other Library Functions acos asin atan atan2 cos cosh hypot sin sinh tan tanh |
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