Message: 7
Date: Fri, 24 Jun 2005 09:37:56 -0700
From: Scott Rossi <[EMAIL PROTECTED]>
Subject: Re: is within ... polygon shape?
To: How to use Revolution <[email protected]>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset="US-ASCII"
Recently, Lynch, Jonathan wrote:
Using the within() function it is possible to accurately detect
whether a point falls within the image since Rev will evaluate a
point falling within the transparent region of the image as false.
> But - would this work 100% for curved polygons or images?
It works reliably with images as long as the transparent regions of the
image are 100% transparent. Try it.
Routines for polygons should work reliably as well.
(Although Jim's routine seems to work only for intersecting edges, and not
when a smaller polygon falls *completely* within a larger polygon -- any
tweak available Jim?)
Regards,
Scott Rossi
Creative Director
Tactile Media, Multimedia & Design
Scott,
I don't understand what you mean when you say it fails with large polygons.
In the stack below, it doesn't seem to make any difference how large
the polygons are. I can't image why Rev would fail to recognize when
a point is within a polygon.
go stack url "http://home.infostations.net/jhurley/CollidingPolygons.rev";
Jim
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