work on raytracing

wifi/estimate/ray2d/Ray2.h

@@ -1,4 +1,24 @@
 #ifndef RAY2_H
 #define RAY2_H
 
+#include "../../../geo/Point2.h"
+
+struct Ray2 {
+
+	/** starting position */
+	Point2 start;
+
+	/** ray direction */
+	Point2 dir;
+
+	/** empty ctor */
+	Ray2() {;}
+
+	/** ctor */
+	Ray2(const Point2 start, const Point2 dir) : start(start), dir(dir.normalized()) {
+		;
+	}
+
+};
+
 #endif // RAY2_H