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closed contour paths: clockwise or anticlockwise - or actually a mixture? [message #87069]

Fri, 03 January 2014 12:53

George.millward
Messages: 26
Registered: October 2012

Junior Member

Hi there,

I'm doing some very straightforward contour plotting - but instead of actually plotting the contours - I'm writing out the path data of closed contours by using the path_info and path_xy keywords.

This is all working fine, but I have a problem: Some of the contour paths (written out as x,y arrays) close in a clockwise order, some close in an anticlockwise order. This is causing trouble when I export the paths to other mapping software because the latter is strictly wanting the paths to always be clockwise.....

Does anyone have any insight into this? Is there some keyword I am missing?
alternatively is there a simple way to establish whether a path is clockwise or anticlockwise so the arrays can be reversed if necessary?

Cheers

George.

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[Message index]

		closed contour paths: clockwise or anticlockwise - or actually a mixture? By: George.millward on Fri, 03 January 2014 12:53
		Re: closed contour paths: clockwise or anticlockwise - or actually a mixture? By: David Fanning on Fri, 03 January 2014 13:01
		Re: closed contour paths: clockwise or anticlockwise - or actually a mixture? By: George.millward on Fri, 03 January 2014 13:13

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