Disney's interactive design system for rapidly creating physical characters and their motions

Check out this amazing software designed by Disney which enables character shapes and their desired motions to be generated very quickly.

From the video description:

We propose an interactive design system for rapid crafting of planar mechanical characters. Our method combines the simplicity of sketch-based modeling with the ease of defining motion through extreme poses. In order to translate these digital designs into fabrication-ready descriptions, our method automatically computes the mechanical structure that makes the characters move as desired. We achieve real-time performance by limiting the mechanical structure between pairs of components to simple building blocks that define, trim, and propagate their motion. By focusing on shape and motion, our system emphasizes the creative aspects of character design while hiding away the intricacies of the underlying mechanical structure. We demonstrate the flexibility of our approach on a set of virtual designs and physical prototypes.

By paring things down to just a character's outline and motion, the program is able to quickly generate 2D prototypes that focus on the underlying mechanical structure. The third dimension (depth) and aesthetic considerations can come later and benefit from a different set of tools. I like what they've done here. Linkages can produce some astonishing output motions from some simple inputs. Figuring out these linkages is far from intuitive however.

Here is where you can learn more about ChaCra: An Interactive Design System for Rapid Character Crafting.

[ Thanks Seth! ]

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The automatic creation of automata: the computational design of mechanical characters

This could be a game-changer in the world of automaton-making. I don't think I've ever had the chance to say something like that.

I caught wind of this project some months ago, but the recent news of this incredible video comes to us by way of Falk Keuten at the excellent blog Spiel und Kunst mit Mechanik. This computer program created by a team at Disney Research, Zurich accepts a desired input motion and then generates the necessary gears and linkages to realize that motion.

From the research paper abstract:

Given an articulated character as input, the user iteratively creates an animation by sketching motion curves indicating how different parts of the character should move. For each motion curve, our framework creates an optimized mechanism that reproduces it as closely as possible. The resulting mechanisms are attached to the character and then connected to each other using gear trains, which are created in a semi-automated fashion. The mechanical assemblies generated with our system can be driven with a single input driver, such as hand-operated crank or an electric motor, and they can be fabricated using rapid prototyping devices.

And it's not all theory or computer simulations, either! The team demonstrated the versatility of the system by creating a bunch of mechanical characters, several of which were manufactured using 3D printing technology. The results are amazing, some showing subtleties of motion that are very difficult to design, but incredibly valuable to the final effect.

Here is the Disney project web site. Here is a link to the research paper (PDF) titled Computational Design of Mechanical Characters.

[ Thanks to John, Falk, and Fred ]

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