How to set linear velocity of a kinematic collision object

[Ahmutkadim]

I have attempted to set linear velocity of a kinematic object with b2d and b2d.body api. It did not worked. How can ı do it?

[Potota]

Kinematic objects aren’t moved by the physics engine (that’s what kinematic means), so the velocity property is completely ignored. Use go.set_position() and go.animate() to move it yourself.

[Ahmutkadim]

What, I do not understand. Box2D engine supports this, besides, then why this issue on github is closed: Support for moving a kinematic object with linear_velocity and angular_velocity · Issue #8101 · defold/defold · GitHub ?

[britzl]

This is fairly new functionality and it was supposed to work to set the velocity. It seems like there is a bug. I will reopen that ticket.

[Ahmutkadim]

Thanks

[totebo]

Related thread:

Setting linear velocity and angular velocity of a kinematic body (#4170) (SOLVED)

I think it boils down to efficiency in the end. This is a good summary: Static bodies are unmoved. Kinetic bodies are moved based on their previous velocities. Dynamic bodies are moved based on their previous velocities, gravity, applied forces, applied impulses, masses, damping, and the restitution and friction values of their fixtures when they experience collisions. Practically, in Defold, I don’t think it’s possible to remove gravity from a dynamic body. This means that dynamic bodies …