If you like to check out the dragon rig, it’s now available on Cogswell’s website here.
This is continuation from the project I started on last summer with making rigs for the animation classes at Cogswell College.
After finishing up the Jaguar, I shifted my work onto the dragon named Cogswell (to loosely tie the character to the college’s mascot), which was modeled and textured by Robert Garcia. With the dragon’s design being pretty close to a quadruped I was able re-use most of the rig techniques from Toothy: IK/FK legs, FK tail, and a IK neck.
Things became more interesting when approaching the unique aspect of Cogswell: the wings.
I originally approached the wings using a similar setup to a Bat rig I did some years ago; which was to keep things fairly simple with only creating joints for the arm and fingers, and skinning the entire membrane to those joints.
Unfortunately, due to the size of the membrane, this approach didn’t deform too well during animation and it was too easy to create ugly creases. I elected to compensate for this by including more joints where the membrane meets the body to help maintain spacing. I also added more joints along the membrane to help animators deal with the volume of the wing.
This approach ended up being a failure as well, there were simply too many moving parts for the animator to wrestle with. Additionally, we only ended up pushing creases around instead of flattening them out for a better deformation. The team went back to the drawing board, and we decided the shape of the wings was simply too complex, as the membrane was attached to so many parts of the dragon’s body, it didn’t really mimic real-world anatomy enough for us to come up with a good animation solution. This in mind, I dusted off my drawing skills to do a paintover on the proposed shape of the wings that Rob should aim for.
With a much simpler wing design, I was able to revert to my original design with good results. The wings behaved during most animations, and I added some additional control to offer a “billowing” effect for some secondary control.