initial checkin of C++ port (in progress)

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@2 0fc631ac-6414-0410-93d0-97cfa31319b6

src/gfx/polynomial.hpp

@@ -0,0 +1,43 @@
+//+----------------------------------------------------------------------------+
+//| Description:  Magic Set Editor - Program to make Magic (tm) cards          |
+//| Copyright:    (C) 2001 - 2006 Twan van Laarhoven                           |
+//| License:      GNU General Public License 2 or later (see file COPYING)     |
+//+----------------------------------------------------------------------------+
+
+#ifndef HEADER_GFX_POLYNOMIAL
+#define HEADER_GFX_POLYNOMIAL
+
+/** @file gfx/polynomial.hpp
+ *
+ *  Solutions to polynomials, used by bezier curve algorithms
+ */
+ 
+// ----------------------------------------------------------------------------- : Includes
+
+#include <util/prec.hpp>
+
+// ----------------------------------------------------------------------------- : Solving
+
+/// Solve a linear equation a x + b = 0
+/** Returns the number of real roots, and the roots themselfs in the output parameter.
+ */ 
+UInt solveLinear(double a, double b, double* root);
+
+/// Solve a quadratic equation a x^2 + b x + c == 0
+/** Returns the number of real roots, and the roots themselfs in the output parameter.
+ */
+UInt solveQuadratic(double a, double b, double c, double* roots);
+
+// Solve a cubic equation a x^3 + b x^2 + c x + d == 0
+/** Returns the number of real roots, and the roots themselfs in the output parameter.
+ */
+UInt solveCubic(double a, double b, double c, double d, double* roots);
+
+// Solve a cubic equation x^3 + a x^2 + b x + c == 0
+/** Returns the number of real roots, and the roots themselfs in the output parameter.
+ *  Based on http://en.wikipedia.org/wiki/Cubic_equation
+ */
+UInt solveCubic(double a, double b, double c, double* roots);
+
+// ----------------------------------------------------------------------------- : EOF
+#endif