Pivot

Pivot refers to both the tool, and the function it creates.

The Pivot tool creates frictionless, invincible axles using Rigid shapes. Unlike Links, pivots do not need to be associated with a particle - this prevents the pivot from physically interfering with other physics.

Pivots can be placed anywhere relative to the associated rigid body - even outside the bounds of the shape. This permits rotation around an axis with any offset.

Despite being invincible and frictionless, there are still caveats to consider. Pivots are not 100% stiff - sufficient force can deflect the rigid shape from it's original location. Additionally, the game has a glitch regarding rotating objects. Particles packed to a higher density display an internal "drag" or resistance to rotation. Individual particles do not have this complication. Rigid shapes with a particle density greater than 1.0 do not display the friction, while higher densities display higher degrees of resistance.