added several grid-walks

added new helper methods/classes (e.g. for heading)
new test cases
optimize the dijkstra
cleanups/refactoring
added timed-benchmarks to the log
many more...

geo/Point3.h

@@ -1,6 +1,8 @@
 #ifndef POINT3_H
 #define POINT3_H
 
+#include <KLib/Assertions.h>
+
 /**
  * 3D Point
  */
@@ -26,6 +28,14 @@ struct Point3 {
 
 	Point3& operator /= (const float v) {x/=v; y/=v; z/=v; return *this;}
 
+	/** read-only array access */
+	float operator [] (const int idx) const {
+		_assertBetween(idx, 0, 2, "index out of bounds");
+		if (0 == idx)	{return x;}
+		if (1 == idx)	{return y;}
+						return z;
+	}
+
 	float length() const {return std::sqrt(x*x + y*y + z*z);}
 
 	float length(const float norm) const {