Need javascript code to select polygonal area on an image

[jvs_desg]

Hi All,

I need to select some area on an image.
But if used a freehand kind of drawing tool that would require lots of
memory to store so many coordinates.
Please help me in writing a script that can be used to select some
polygonal area on
the image, so that the number of coordinates can be reduced to
minimum.

Thanks in advance,
Jd

 

[Doug Miller]

Hi All,

I need to select some area on an image.
But if used a freehand kind of drawing tool that would require lots of
memory to store so many coordinates.
Please help me in writing a script that can be used to select some
polygonal area on
the image, so that the number of coordinates can be reduced to
minimum.

I'm not sure I understand why you want a script to do this; is there some
reason you can't accomplish what you want by using a client-side image map?

 

[pr]

I need to select some area on an image.
But if used a freehand kind of drawing tool that would require lots of
memory to store so many coordinates.
Please help me in writing a script that can be used to select some
polygonal area on
the image, so that the number of coordinates can be reduced to
minimum.

If it's a user selection you want, the problem would be rendering its
outline on the page. You would probably be looking at canvas

http://developer.mozilla.org/en/docs/HTML:Canvas

or SVG

http://developer.mozilla.org/en/docs/SVG

Or Flash.