[MATH-263] Various distance methods in "Vector3D"

• Type: New Feature
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Assignee: Luc Maisonobe
• Reporter: Gilles Sadowski
• Created: 29/Apr/09 09:49
• Updated: 07/Aug/09 09:13
• Resolved: 29/Apr/09 19:10

Description

Hi.

As was discussed in the ML (cf. '[math] "equals" in "Vector3D"' thread), it would be useful to add the various distance methods: L1 norm, L2 norm, L-infinity norm.

One suggestion has been to use an enum:

enum Norm

{ L_0, L_1, L_2, L_infinity }

;
static double distance(Vector3D a, Vector3D b, Norm n)

{ ... }

Another, to define several methods:

a.distance1(b) { ... }

a.distance(b)

{ ... }
a.distanceInf(b) { ... }

At the cost of longer typing (but maybe there are other advantages) the above could also be static.

Best,
Gilles