shape ops work in progress
add quartic solution for intersecting quadratics
git-svn-id: http://skia.googlecode.com/svn/trunk@5541 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/experimental/Intersection/CubicUtilities.h b/experimental/Intersection/CubicUtilities.h
index 0b014ac..ffaeeb2 100644
--- a/experimental/Intersection/CubicUtilities.h
+++ b/experimental/Intersection/CubicUtilities.h
@@ -4,6 +4,9 @@
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
+#if !defined CUBIC_UTILITIES_H
+#define CUBIC_UTILITIES_H
+
#include "DataTypes.h"
double cube_root(double x);
@@ -16,3 +19,5 @@
bool rotate(const Cubic& cubic, int zero, int index, Cubic& rotPath);
double secondDerivativeAtT(const double* cubic, double t);
void xy_at_t(const Cubic& , double t, double& x, double& y);
+
+#endif