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RFE: net.phys2d.math.Vector2f equals() and hashcode()
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Author:  NickZA [ Sun May 30, 2010 7:28 pm ]
Post subject:  RFE: net.phys2d.math.Vector2f equals() and hashcode()

Slick has it, but phys2d does not. Obviously, equals() and hashcode() are used for important goodies like collections.

The main reason I don't do it myself is because I can't commit to your repo. And if I wrote something, I don't know if you'd be willing to include it?

Author:  NickZA [ Mon May 31, 2010 8:58 am ]
Post subject: 

Added to phys2d Vector2f (copied from Slick's Vector2f implementation):

    * @see java.lang.Object#equals(java.lang.Object)
   public boolean equals(Object other)
      if (other == null) return false;
       if (other == this) return true;
      if (other instanceof Vector2f) {
         Vector2f o = ((Vector2f) other);
         return (o.x == x) && (o.y == y);
      return false;
    * @see java.lang.Object#hashCode()
   public int hashCode() {
        return 997 * ((int)x) ^ 991 * ((int)y); //large primes!

...Would be nice if this were included in phys2d, so I don't have to keep it in a separate repository. :wink:

Author:  MatthiasM [ Mon May 31, 2010 7:38 pm ]
Post subject: 

There is no reason to include equals or hashCode() in any interface (eg ROVector2f) - they are already available via Object.

Author:  NickZA [ Mon May 31, 2010 8:37 pm ]
Post subject: 

Hmm, good point. I removed that from the above post.

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