Animation Using Keyframing and Projected Dynamics Simulation

A computing device comprising:

• a memory device configured to maintain parameters that define handles associated with multiple object regions within an animation object, a first object region of the multiple object regions comprising a first handle and a second object region of the multiple object regions comprising a second handle, the first handle and the second handle independently selectable to set an animation constraint for the respective first object region or second object region of the animation object;
• a processor system to execute an animation simulator as a computer application, the animation simulator configured to:
• receive a first user input to the first handle to set the animation constraint for the first object region;
• based on the first user input, set the animation constraint on the first handle for the first object region;
• and
• project a simulation of the animation object by simulating the first object region of the animation object based on the animation constraint.

A computer-readable storage device comprising instructions stored thereon that, responsive to execution by one or more processors, perform operations comprising:

• displaying at least a first handle associated with a first object region of an animation object and a second handle associated with a second object region of the animation object, the first handle and the second handle independently selectable to set an animation constraint for the respective first object region or second object region of the animation object;
• receiving a first user input to the first handle to set the animation constraint for the first object region;
• based on the first user input, setting the animation constraint on the first handle for the first object region;
• and
• projecting a simulation of the animation object by simulating the first object region of the animation object based on the animation constraint.