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Offline aggsy

Junior Newbie





« Posted 2005-08-31 10:52:39 »

If I was to start with an identity matrix, after the following transformation sequence (which is pseudo code), where would the cube be drawn?

translate(0, 0, 10)
rotate(90, 1, 0, 0)
translate(0, 0, 10)
draw cube

In my opinion, the cube would be drawn, 10 units AWAY along Z axis and 10 units DOWN along Y axis? Would I be right? Someone was telling me that it is actually drawn 10units AWAY along Z axis and 10 units UP along Y axis. Can someone please confirm?

James.
Offline Riven
Administrator

« JGO Overlord »


Medals: 1239
Projects: 4
Exp: 16 years


Hand over your head.


« Reply #1 - Posted 2005-08-31 10:58:40 »

The origin will be at:

 0, -10, 10

So *you* were right Smiley

HTH

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Offline rexguo

Junior Devvie




Real-Time Java


« Reply #2 - Posted 2005-09-01 06:48:37 »

The trick to understanding OpenGL transforms
is by visualising it. Get the interactive demo
by Nate Robbins from http://www.xmission.com/%7Enate/tutors.html.

http://www.rexguo.com - Technologist + Designer
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