- Point(): x(0), y(0), z(0) { }
- Point(float x_, float y_): x(x_), y(y_), z(0) { }
- Point(float x_, float y_, float z_): x(x_), y(y_), z(z_) { }
+ Vector(): x(0), y(0), z(0) { }
+ Vector(float x_, float y_): x(x_), y(y_), z(0) { }
+ Vector(float x_, float y_, float z_): x(x_), y(y_), z(z_) { }