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Re: POLYFILLV weirdness [message #51438 is a reply to message #51350]

Fri, 17 November 2006 15:52

dktr.ted
Messages: 17
Registered: November 2006

Junior Member

> PolyFillV is not using the provided polygons coordinates but a "fix()"
> of them.... which induce this extra line on the left and at the bottom
> (and a few missing pixels on the right side and on the top If I remember
> well). I personnaly used a round() over my polygon coordinates and it
> was returning much better results... though still not perfect!

This practice is particularly horrifying to me considering I frequently
use ROIs defined in physical coordinates and convert them to array
coordinates (commonly fractional) before running POLYFILLV. Is there
anywhere I can have a look at the actual algorithm used in IDL for this
routine? The documentation references the scan line coordinate system
defined in Rogers, Procedural Elements of Computer Graphics, 1985, but
I'm reluctant to hunt down this out of print text without confirmation
that I will get something useful out of it.

Ted

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[Message index]

		POLYFILLV weirdness By: dktr.ted on Thu, 16 November 2006 19:29
		Re: POLYFILLV weirdness By: badjelly.witch on Mon, 20 November 2006 14:49
		Re: POLYFILLV weirdness By: JD Smith on Mon, 20 November 2006 12:31
		Re: POLYFILLV weirdness By: Jean H. on Sun, 19 November 2006 14:43
		Re: POLYFILLV weirdness By: dktr.ted on Fri, 17 November 2006 15:52

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