asymptote 1.72 sources (not integrated into build yet)

git-svn-id: svn://tug.org/texlive/trunk@13110 c570f23f-e606-0410-a88d-b1316a301751

1 files changed, 24 insertions, 0 deletions

diff --git a/Build/source/utils/asymptote/examples/gamma.asy b/Build/source/utils/asymptote/examples/gamma.asy
new file mode 100644
index 00000000000..f92dd775abb
--- /dev/null
+++ b/Build/source/utils/asymptote/examples/gamma.asy
@@ -0,0 +1,24 @@
+import graph;
+size(300,IgnoreAspect);
+
+bool3 branch(real x)
+{
+  static int lastsign=0;
+  if(x <= 0 && x == floor(x)) return false;
+  int sign=sgn(gamma(x));
+  bool b=lastsign == 0 || sign == lastsign;
+  lastsign=sign;
+  return b ? true : default;
+}
+
+draw(graph(gamma,-4,4,n=2000,branch),red);
+ 
+scale(false);
+xlimits(-4,4);
+ylimits(-6,6);
+crop();
+
+xaxis("$x$",RightTicks(NoZero));
+yaxis(LeftTicks(NoZero));
+
+label("$\Gamma(x)$",(1,2),red);