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authorHans Hagen <pragma@wxs.nl>2022-10-14 10:56:48 +0200
committerContext Git Mirror Bot <phg@phi-gamma.net>2022-10-14 10:56:48 +0200
commit0aa93a6d31a45d8df2d8516567b98967ce04f183 (patch)
tree7e1942650512f1994ca56c1eba245973240d4b71 /metapost/context/base/mpxl/mp-math.mpxl
parentc161b7d6fe142231346cc1844e6e27c0ab7718c1 (diff)
downloadcontext-0aa93a6d31a45d8df2d8516567b98967ce04f183.tar.gz
2022-10-14 10:15:00
Diffstat (limited to 'metapost/context/base/mpxl/mp-math.mpxl')
-rw-r--r--metapost/context/base/mpxl/mp-math.mpxl10
1 files changed, 10 insertions, 0 deletions
diff --git a/metapost/context/base/mpxl/mp-math.mpxl b/metapost/context/base/mpxl/mp-math.mpxl
index 404d42160..3d9ad81d3 100644
--- a/metapost/context/base/mpxl/mp-math.mpxl
+++ b/metapost/context/base/mpxl/mp-math.mpxl
@@ -172,6 +172,16 @@ else : % decimal
fi ;
+%D Variant on post to the mailing list by MC:
+
+vardef atantwo(expr dy, dx) =
+ if dx == 0 :
+ if dy < 0 : - fi pi / 2
+ else :
+ atan(dy/dx) if dx > 0 : if dy < 0 : - else : + fi pi fi
+ fi
+enddef ;
+
permanent
m_acos, m_acosh, m_asin, m_asinh, m_atan, m_atantwo, m_atanh, m_cbrt, m_ceil,
m_copysign, m_cos, m_cosh, m_deg, m_erf, m_erfc, m_exp, m_exptwo, m_expm, m_fabs,