X-Git-Url: http://shamusworld.gotdns.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fgeometry.h;h=89360884d1bdc0f1259c0db2e3b59499fb8864ae;hb=fd5a80446b2abfdfb9d8951fcc03fb1b55ad707c;hp=6ff456410aa22ba01682128cd17a8392707c2a3b;hpb=c58b8a9f8b1ae5494857fc423ed8e33b2bbcf329;p=architektonas

diff --git a/src/geometry.h b/src/geometry.h
index 6ff4564..8936088 100644
--- a/src/geometry.h
+++ b/src/geometry.h
@@ -3,6 +3,9 @@
 
 #include "vector.h"
 
+class Line;
+class Circle;
+
 class Geometry
 {
 	public:
@@ -11,6 +14,9 @@ class Geometry
 		static double ParameterOfLineAndPoint(Point, Point, Point);
 		static Point MirrorPointAroundLine(Point, Point, Point);
 		static Point RotatePointAroundPoint(Point, Point, double);
+		static double Determinant(Point, Point);
+		static int Intersects(Line *, Line *, double * tp = 0, double * up = 0);
+		static int Intersects(Line * l, Circle * c, double * tp = 0, double * up = 0, double * vp = 0, double * wp = 0);
 };
 
 #endif 	// __GEOMETRY_H__