Recently, I interviewed someone who was described to me as a computer
graphics expert. Being my first interview, I didn’t know what kind of
questions to ask him in order to evaluate his expertise. Luckily my
first question was, “What is gimbal lock?”, and to my surprise, he
didn’t know. :o I can’t imagine a person at an “expert” or an even
“advanced” level not knowing what gimble lock is. :eek:
Anyway, if I have to interview more people, I can’t go in armed with
just one question! What are some effective interview questions to
determine a person’s knowledge of 3D graphics? :blush:
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while its a surprise that an expert doesnt know what a gimble lock lock
is, usually, one doesnt ask questions in an interview that can just be
looked up. i mean, this isnt a pop quick for developers or something.
usually, a measure of expertise would be the projects the person has
what questions you ask, depends on why you’re doing an interview, as
well as who (or what) you’re doing the interview for. i’d imagine, you’d
want to ask questions that your readers would be interested in. you’d
want to go a step beyond asking common knoweldge questions, and to
something that’d actually require someone in tune with the topic to
rather than ask what the gimbal lock is, ask how the expert deals with
it. ask what he’d/she’d suggest to people struggling with it, stuff like
just an idea.
In my opinion, there are many areas in conputer graphics. Maybe the guy
is not a expert in _all_ of the areas.
Don’t rule out the possibility that the person knew about it and just
didn’t know that it was *called* a gimbal lock.
i remember how i explained one of my friends, a 3d artist, what gimbal
he looked at me, irritated, and thought what the hell did he talked
2 days later he came to me explained about some rotating problem he
found out while thinking about movement of objects..
guess what it was:D
What davepermen? My guess is :rolleyes: … gimbal lock… Is that true?
you’re _SOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO_ near to it:D
okay, i tell you. you’re _RIGHT_:D
What is a gimbal lock???
Gimbal lock is where a rotation maps one principle axis onto another,
resulting in a loss of a degree of freedom.
An example of when gimbal lock occurs is say for example, you you want
to rotate around the x-axis, and what you get is a rotation around the
y-axis. Any system that uses Eular angles will have problems with gimbal
The way to fix that problem is to use Quaternions. Take a look at the
following webpage and it will explain everything in detail: