RE: [cgmo-webcgm] Telecon REMINDER - agenda

["Bezaire, Benoit" <bbezaire@ptc.com>]

Hi All,

Thanks Ulrich for sending this in. I'm focusing on the 'rotate' call in this email. In an attempt not to get too technical, I'll try to work by examples.

I think we can agree that 'dial' rotation is a typical use case for CGM illustrations. I've attached a WebCGM 2.0 file that contains a single APS (AmpsMeter, which we want to animate). Let's assume that this dial is part of a larger 'training' control system.

In the 'close' state, the needle is in its current position.
In the 'running' state, the needle is in the middle.
In the 'danger' state, the needle is pointing to the far right.

There's a 35 degree difference between the left position to middle; and another 35 degrees from middle to the right position.

Say the system goes from 'close' to 'running', so we need to do 35 degree rotation. Here are some questions about how to do that.

- how do we specify the center of rotation? In this sample file, the center of rotation is not the center nor a corner of the bounding box. How do we solve this?

- is it a 35 degree or -35 degree rotation? what is our coordinate system?

Now, lets assume the system goes from 'running' to 'danger'.

- are transforms additive or not; i.e., is it an additional 35 degree rotation we want to do; or is it a 70 degree rotation? additive or replace?

I'll send questions about other API in follow up emails.

Cheers,
Benoit.

-----Original Message-----
From: Ulrich Laesche [mailto:ulrich@ematek.de] 
Sent: Wednesday, October 24, 2007 7:28 AM
To: 'CGM Open WebCGM TC'
Subject: AW: [cgmo-webcgm] Telecon REMINDER - agenda

Dear All,

Attached is a Word document containing a draft transform interface description.  I added a few comments to the team's document based on what was discussed at the last phone conference.

Hope this helps
Ulrich


-----Ursprüngliche Nachricht-----
Von: Cruikshank, David W [mailto:david.w.cruikshank@boeing.com]
Gesendet: Dienstag, 23. Oktober 2007 00:31
An: CGM Open WebCGM TC
Betreff: [cgmo-webcgm] Telecon REMINDER - agenda

Please send regrets if you can't make it, BUT please try to participate, if possible.
We will be making decisions concerning:
1) WebCGM 2.1 go ahead
2) Provisional approval of requirement elements

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Thx...Dave
 <<20071024_WebCGM_TC_Telecon_agenda.doc>>
Technical Fellow - Graphics/Digital Data Interchange Boeing Commercial Airplane 206.544.3560, fax 206.662.3734 david.w.cruikshank@boeing.com

ampsmeter.cgm