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Calculating distance between pixels

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Join Date: Nov 2006

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Calculating distance between pixels

Nov 17th, 2006

Hi,

Can someone tell me the code to calculate the distance between two pixel points.

If i enter Point(x1,y1) and Point(x2,y2) then i get length of the line between them (in pixels).

Thanks.

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Re: Calculating distance between pixels

Nov 17th, 2006

ever heard of Pythagoras' Theorem " a on power of two plus b on power of two equals to c on power of two"?
just example

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(x1 - x2 ) = x           // your a
(y1 - y2) = y            // your b

if ( x < 0) then x * (-1)
if ( y < 0) then y * (-1)

x^2 + y^2 = z^2       // z is your c distance between pixels    this ^2 on power of two

then get square root

Last edited by peter_budo; Nov 17th, 2006 at 7:39 am.

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Re: Calculating distance between pixels

Nov 17th, 2006

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Originally Posted by peter_budo

ever heard of Pythagoras' Theorem " a on power of two plus b on power of two equals to c on power of two"?
just example
Help with Code Tags

(Toggle Plain Text)
(x1 - x2 ) = x           // your a
(y1 - y2) = y            // your b

if ( x < 0) then x * (-1)
if ( y < 0) then y * (-1)

x^2 + y^2 = z^2       // z is your c distance between pixels    this ^2 on power of two

then get square root
(x1 - x2 ) = x // your a (y1 - y2) = y // your b if ( x < 0) then x * (-1) if ( y < 0) then y * (-1) x^2 + y^2 = z^2 // z is your c distance between pixels this ^2 on power of two then get square root

lleave out the multiplying with -1 : x^2 is eual to (-x)^2