Apply all forces at the angle of an object using its restitution

How do I...?
1

I want to make my object bounce (like a pogo stick) and have the ability to increase the height of the bounce with a button press (based on the Y linear velocity of the object on collision with the ground). The easiest way I have found to get that working is by increasing the objects restitution >1 on a button press. However, I want my object to only bounce in the direction of the objects angle, but the object is bouncing in odd directions due to (I think) the way the physics works on the hit box of the object.

Is there a way to apply all forces to the object at the objects angle on collision with the ground? If I use the apply force action it wants me to set a value for the force but I only want to change the angle the force is applied at and use the objects restitution and its Y linear velocity on collision to set the value of the force applied.

Alternatively, is there a way to emulate this behaviour by just using the set linear velocity action and setting the restitution to zero? I know I can do that and get the movement I want but I couldn’t figure out how to increase the linear velocity based on the Y linear velocity of the object on collision with the ground.

I hope this is enough information. Let me know if not.

Many thanks in advance,
Sam

2

I don’t think you would have to set the restitution to zero. You can use the action “linear velocity towards an angle”, and for the speed use object.Physics2::LinearVelocity(). This works easily for an object floating around by itself to turn without losing speed, but I’m not sure what will happen when collisions are also involved. Physics2 collisions happen over time and so I wonder if you would want to change the velocity only when the collision ends? (Fortunately there’s a condition for that).

1 Like
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Hi, thanks for the reply. Sorry, I hadn’t checked back on this until now. I managed to get it working the way I intended just by setting the angular velocity of the object to 0 on collision with the ground.