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- Date: Fri, 5 Dec 1997 21:41:19 +0400
- From: Charles Blaquiere <blaq@INTERLOG.COM>
- Subject: Re: [IML] QUEST, IMD: The Cycles Editor
-
- Mike Bayona wrote:
- >
- > This gave me an interesting thought...I've seen a number of animations
- > with Imagine where airplane propeller blades were lacking because you can
- > only make them spin so fast with keyframes....
-
- You mean, setting a keyframe on every frame (for 0, 120, 240, 0, 120,
- 240... degrees) isn't fast enough?
-
- > since its not possible to apply effects, like rotate, to a CHILD object
-
- What you can do is split off the propeller as a separate object, and
- then use Associate in the Action dialog to give it a constant position
- and alignment, relative to its former parent. Since the propeller is now
- a separate object, you can apply the Rotate2 effect at will.
-
- The only scenario I can come up with, in BVRE, where this wouldn't be
- acceptable, is if you deformed the parent (e.g. make a cartoony
- airplane), in which case the propeller's location respective to the
- parent axis would change from frame to frame. Apart from that, I think
- my solution would work well.
-
- ----------------------------------
-
- Date: Sat, 6 Dec 1997 08:11:19 -0600
- From: Louis Sinclair <rundio@visi.com>
- Organization: Rundio Digital Design
-
- This would yield an RPM of 450, probably not enough for takeoff :)
-
- Propellers, spoked wheels, or anything that spins very quickly is very
- difficult to make look right by trying to actually model it. Anything
- that spins faster than your frame rate is going to be problematical.
- That's why wagon wheels usually look like they're spinning backwards
- in old westerns.
-
- I've had the best results by modeling my propeller and rendering two
- frames using motion blur. I then mapped that image to a primitive
- disk with a matching transparency map so I had a blurred propeller on
- a disk that I associated to my airplane the way Charles recommended
- with a propeller. Use Rotate to spin the disk slowly. This simulates
- the 'wagon wheel' effect.
-
-