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RE: More on getObjectExtent()

From: Bezaire, Benoit <bbezaire@ptc.com>
Date: Tue, 18 Nov 2008 14:39:51 -0500
Message-ID: <B0D4682CF6F84041AC7C42AA6E9E81330C48F2B4@HQ-MAIL3.ptcnet.ptc.com>
To: "WebCGM WG" <public-webcgm-wg@w3.org>
One more question. I think we already talked about this and came to a
conclusion, but I wonder if the right decision was taken.
Does getObjectExtent() include the 'viewcontext' APS attribute in its
I think we talked about this a while back and said 'no'. Again, the
current wording doesn't mention 'viewcontext' so I have to assume it's
not included.
However, say I have the following scenario in test.cgm:
test.cgm contains an APS called 'myTarget' with a 'viewcontext' larger
than its graphical primitives.

	I can navigate directly to 'myTarget' with test.cgm#myTarget and
I should _zoom_ to the 'viewcontext' rectangle
	I can also use myPicture.setView(
myPicture.getAppStructureById("myTarget").getObjectExtent() );

The second case would generate a different result compared to the first,
is that what we want?


From: public-webcgm-wg-request@w3.org
[mailto:public-webcgm-wg-request@w3.org] On Behalf Of Bezaire, Benoit
Sent: Tuesday, November 18, 2008 1:53 PM
Subject: More on getObjectExtent()

The wording says "[...] The bounding box calculation is based on the
abstract locus of the primitives within the APS."
What does 'abstract locus' mean?
I'd like to know if getObjectExtent() returns a tight bounding box on a
given APS. i.e., given a polybezier, are control points part of the
bounding box calculations or not?
Received on Tuesday, 18 November 2008 19:40:36 UTC

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