jyapayne/Nim
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Merge pull request #2977 from apense/patch-5

Browse source 
Conversion between radians and degrees.Fixes #2881
This commit is contained in:
Andreas Rumpf 2015-06-25 13:14:59 +02:00
commit 43c64c7545
1 changed files with 13 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

13
lib/pure/math.nim
View file

@ -12,6 +12,10 @@
## Basic math routines for Nim. ## Basic math routines for Nim.
## This module is available for the `JavaScript target ## This module is available for the `JavaScript target
## <backends.html#the-javascript-target>`_. ## <backends.html#the-javascript-target>`_.
##
## Note that the trigonometric functions naturally operate on radians.
## The helper functions `degToRad` and `radToDeg` provide conversion
## between radians and degrees.
include "system/inclrtl" include "system/inclrtl"
{.push debugger:off .} # the user does not want to trace a part {.push debugger:off .} # the user does not want to trace a part
@ -38,6 +42,7 @@ const
## meaningful digits ## meaningful digits
## after the decimal point ## after the decimal point
## for Nim's ``float`` type. ## for Nim's ``float`` type.
RadPerDeg = PI / 180.0 ## number of radians per degree
type type
FloatClass* = enum ## describes the class a floating point value belongs to. FloatClass* = enum ## describes the class a floating point value belongs to.
@ -317,6 +322,14 @@ else:
{.pop.} {.pop.}
proc degToRad*[T: float32|float64](d: T): T {.inline.} =
## Convert from degrees to radians
result = T(d) * RadPerDeg
proc radToDeg*[T: float32|float64](d: T): T {.inline.} =
## Convert from radians to degrees
result = T(d) / RadPerDeg
proc `mod`*(x, y: float): float = proc `mod`*(x, y: float): float =
## Computes the modulo operation for float operators. Equivalent ## Computes the modulo operation for float operators. Equivalent
## to ``x - y * floor(x/y)``. Note that the remainder will always ## to ``x - y * floor(x/y)``. Note that the remainder will always