Help Aerodynamics for non cloth

[josemendez]

Do I understand correctly from documentation that only cloth has simulation of aerodynamics from particle velocity?

Hi!

No, cloth, ropes, rods, fluids all are affected by wind. Cloth is just used as an example in the docs. See the "ComputeRopes" sample scene for an example of ropes affected by wind. Or if you change the solver's "wind" vector in the "CharacterTentacles" sample scene, you'll see the character's limbs/tail affected by wind.

There's an "Aerodynamics" section in the ObiBone component that lets you control how it's affected by wind.

Is there a way to enable this, or do I need to do this by code or apply fake "wind" each tick? E.g. apply aerodynamics on bones for ears when moving a character.

Even if you couldn't apply wind, you can still apply forces or accelerations. Note you can use force zones to apply wind, force, or acceleration.

The difference between wind, force and acceleration is that wind takes into account the shape and mass of the object: a cloth directly facing the wind direction "catches" more wind and is affected more than a cloth that's perpendicular to it. Similar thing applies to a rope or rod. The surface of a fluid is more affected by wind, since it is exposed to it (while particles inside its volume are shielded from it). Heavier objects are less affected by wind that lighter ones.

Forces take into account mass as well, however affect the object regardless of its shape. And finally accelerations disregard both shape and mass and just change the object's velocity.

For something as simple and relatively small as ears, it's unlikely you'll notice any difference between wind and forces.

kind regards