New upstream version 2.0.1+repackupstream/2.0.1+repackupstream

1 files changed, 23 insertions, 0 deletions

diff --git a/numlib/roots.h b/numlib/roots.h
new file mode 100755
index 0000000..e14b72d
--- /dev/null
+++ b/numlib/roots.h
@@ -0,0 +1,23 @@
+
+/*
+ *  Roots3And4.c
+ *
+ *  Utility functions to find cubic and quartic roots,
+ *  coefficients are passed like this:
+ *
+ *	  c[0] + c[1]*x + c[2]*x^2 + c[3]*x^3 + c[4]*x^4 = 0
+ *
+ *  The functions return the number of non-complex roots and
+ *  put the values into the s array.
+ *
+ *  Author:		 Jochen Schwarze (schwarze@isa.de)
+ *               (From Graphics Gems I)
+ */
+
+int SolveQuadric(double c[3], double s[2]);
+
+int SolveCubic(double c[4], double s[3]);
+
+int SolveQuartic(double c[5], double s[4]);
+
+