Hi Tien,
I can't make sense out of your expression for at least 2 reasons:
a) if Vi is a vector (xi,yi), the term 'Vi-1' doesn't make sense
b) 'Vi-Vi' would be (0,0), so all the Vi's in your expression cancel
out...
Maybe the '-' in your expression is really a '*' denoting the
(inner) vector-product?
If you tell the mailinglist what you're trying to do, maybe some-
one can make sense of it and help you.
cheers,
Robert.
> Tien Tran Thuong wrote:
>
> Hello,
>
> Could anyone show me please how to calculate the expression below :
>
> | ( Vi-1 - Vi ) - ( Vi - Vi+1 ) |
>
> Where Vi = (xi,yi) is coordinate of the i-th vertex.
>
> Thank you in advance
--
---------------------------------------------------
Robert Pies
Ludwigstr. 58
04315 Leipzig
Germany
+49-341-6888217 (phone&fax)
[EMAIL PROTECTED]
--
---------------------------------------------------
Robert Pies
Ludwigstr. 58
04315 Leipzig
Germany
+49-341-6888217 (phone&fax)
[EMAIL PROTECTED]
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