Trying to switch to more object-oriented

sdlpp/sdlpp_geometry_vector.hpp

@@ -0,0 +1,31 @@
+#ifndef SDLPP_HPP_GEOMETRY_VECTOR
+#define SDLPP_HPP_GEOMETRY_VECTOR
+
+#include "sdlpp_common.hpp"
+#include "sdlpp_vector.hpp"
+#include <cmath>
+
+namespace SDLPP {
+template<typename T>
+double vecDotProduct( const Vec2D<T> &a, const Vec2D<T> &b ) {
+    return a * b;
+}
+template<typename T>
+double vecLengthSquared( const Vec2D<T> &vec ) {
+    return vecDotProduct( vec, vec );
+}
+template<typename T>
+double vecLength( const Vec2D<T> &vec ) {
+    return std::sqrt( vecLengthSquared( vec ) );
+}
+template<typename T>
+double vecDistanceSquared( const Vec2D<T> &a, const Vec2D<T> &b ) {
+    return vecLengthSquared( a - b );
+}
+template<typename T>
+double vecDistance( const Vec2D<T> &a, const Vec2D<T> &b ) {
+    return vecLength( a - b );
+}
+} // namespace SDLPP
+
+#endif