Inertia for wheels

[jfschwarz]

This adds some inertia on the color and stone picker wheels.

• Simplified the calculation of the drag point's polar angle

  

• The previous pin state has become the valueAtStart ref. It snapshots the rotation value at the moment of mousedown when starting a new drag. If no animation is ongoing it's the value prop, if an inertia spin is running we need to read the current spring value.

• For calculating the drag velocity vector at release, we take the absolute velocity vector provided by the useDrag hook and reconstruct the respective signs from the movement vector.

const velocity = {
  x: absVelocity[0] * Math.sign(movement[0]),
  y: absVelocity[1] * Math.sign(movement[1]),
};

• We now need to calculate the component of the velocity vector in the direction of the rotation, i.e. the tangent of the drag release point:

[cedricwaxwing]

🔥🔥🔥