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TTYO
11-15-2009, 09:04 AM
Hello Cgtalkers

I need critique on something which is rather strange to some.

Ok I am designing a creature that walks on fours but can fly something like a pterosaur. I am not sure if this animation cycle would look plausible.

According to new research pterosaurs take off using both the forelimbs and hindlimbs..

In my creature the hindlegs are stronger and longer than a Pterosaur so the animation would not look like a Pterosaur... I need proper critique to see if this works...

This one is for small species
http://www.youtube.com/watch?v=3NLa_3aEBwc (http://www.youtube.com/watch?v=HreKp3jlfgM)

This one is for larger species that are with a 3-5 metre. The number of jumps/runs per take off increases with size.
http://www.youtube.com/watch?v=HreKp3jlfgM

robcat2075
11-15-2009, 07:11 PM
hard to judge a non-existent species with no meat on his bones. :)


just from a body mechanics view it seems unlikely that the biggest jump would be from the action of the front legs (if they are the weaker) and the rear legs never seem to be extending fully which they should do if he's trying to push himself in to the air in the minimum of time.

Have you considered just having him leap off a cliff? Getting blown out of a volcano? Maybe a ski jump off the tail of a brontosaurus?

TTYO
11-16-2009, 02:32 AM
I am looking for take off straight from the ground. Also the Creature's front legs are stronger than its back legs. Pterosaurs have very weak legs so this animation cycle is unique to my creature becos its legs are as strong as a bird's. It uses both front and back legs...

TTYO
11-16-2009, 07:12 AM
Ok edited a little bit
http://www.japan-legend.com/forum/index.php?app=core&module=attach&section=attach&attach_rel_module=post&attach_id=5544

This one is for smaller species... This one is based on references of smaller birds which take off immediately from a standing start. Also smaller species have a lot of wing flapping.
http://www.youtube.com/watch?v=JCgPd6nTYfE

This one is for bigger species.. Becos it's heavier than the small one, it will take jumps before take off. The number of jumps and runs required will increase with the size of the species... the 8 m wingspan species will need about 3-4 hops before it takes off.
http://www.youtube.com/watch?v=mKMjixcdb9A

robcat2075
11-24-2009, 07:02 PM
Well, it's plausible I suppose, but on the small one... I'm doubtful his forward velocity would be so slow with all that flapping going on. He's practically hovering.

Interesting animations!

TTYO
11-25-2009, 12:40 PM
This is the third one approved by members of a science forum.

Small
http://www.youtube.com/watch?v=ZZ4IwWocYoE

Large
http://www.youtube.com/watch?v=rME7cMwgQoo

TTYO
11-25-2009, 03:31 PM
Large Version 4
http://www.youtube.com/watch?v=l1KFgz2cSJE

robcat2075
12-02-2009, 02:32 AM
Large Version 4
http://www.youtube.com/watch?v=l1KFgz2cSJE

I'm guessing those rear legs are IK since they trail out of the shot ina very linear fashion. That's not working for me.

robcat2075
12-02-2009, 02:40 AM
This is the third one approved by members of a science forum.



scientists apparently unaware of action/reaction :surprised


I think the torso is moving too linearly thru the air while the wings flap wildly.

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