added missing code changes

started working on refactoring of sensors
new test-cases

geo/BBox3.h

@@ -60,6 +60,17 @@ public:
 		p2 -= p;	// decrease maximum
 	}
 
+	/** grow the bbox by the amount given for each dimension */
+	void grow(const float v) {
+		grow(Point3(v,v,v));
+	}
+
+	/** grow the bbox by the amount given for each dimension */
+	void grow(const Point3& p) {
+		p1 -= p;	// decrease minimum
+		p2 += p;	// increase maximum
+	}
+
 	/** does the bbox contain the given point? */
 	bool contains(const Point3& p) const {
 		if (p.x < p1.x) {return false;}