Distance between two points

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On 15/05/2010 at 13:20, xxxxxxxx wrote:

User Information:
Cinema 4D Version:   11.5
Platform:   Windows  ;
Language(s) :     C++  ;

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Does anyone know how I would find the distance between two points.

Let's say that one point is  p1 = Vector(12, 34, 90);

And the other point is p2 = Vector(46, 766, 90);

How would I find the distance between p1 & p2?

~Shawn

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On 15/05/2010 at 14:32, xxxxxxxx wrote:

Len(p2-p1)

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On 15/05/2010 at 14:48, xxxxxxxx wrote:

Great thanks!

~Shawn

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On 15/05/2010 at 15:45, xxxxxxxx wrote:

You're stealing my thunder, Samir.
This was eventually a question that I'd have known the answer for :-P

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On 16/05/2010 at 01:15, xxxxxxxx wrote:

Well, that happens when you move away to turkey Jack. There´s a delay now as I am still nearer to the us now. ;-)

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On 16/05/2010 at 11:00, xxxxxxxx wrote:

Actually if you are using the length for an often called comparision routine, it might be wiser to avoid len or any sqrt related routine. They are relatively slow.

Kabe

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On 16/05/2010 at 14:50, xxxxxxxx wrote:

how would you do it without using those functions?

~Shawn

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On 17/05/2010 at 03:54, xxxxxxxx wrote:

Well, just use the squared distances.

The squared distance ist (x1-x2)^2+(y1-y2)^2+(z1-z2)^2.

Instead of applying root to get length, you square the distance which you use for comparision.

Cheers

Kabe

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On 28/07/2010 at 13:05, xxxxxxxx wrote:

That's what I do when it is simply a distance comparison.  Sqrt() is expensive!