Problem with physical objects and collisions

Development Programming & Scripting Blueprint
1

I have been trying to solve this problem with physics for some time.
I have the following objects on the map: Character, Vehicle and Horse.
When the character approaches/touch the car, it blocks it and the car does not move. And it’s fine. But when I shoot a car with bullets, the car moves and even bounces. Also, when a horse hits a car, it can kick it as a football ball.
Horse is character and blocks everything in collision settings. Vehicle is PhysXVehicl and also block everything.
I tried various variants with collisions and nothing gives good results. I even created new collision boxes to block bullets but it’s not a good solution because it’s inconvenient.

Problem is that bullets can move vehicle and horse can play football with vehicle :slight_smile:

Are there any special settings for collisions of physical objects that will just block specific object, but not move the car? Collision boxed can work, but when I approach the car then the bullets hit the car even though it is a crosshair outside the vehicle (because of collision box).

Vehicle mass have no big effect on this.

2

If you’re using one of the base template of Unreal, make sure your projectile doesn’t have a bunch of codes that “adds impulse” to the hit object.

You can check out three different settings to turn off such behavior:

  • “simulate physics” turn it off on your skeletal / static meshes used by your Car and Horse
  • “enable gravity” turn it off on the same components
  • if one of your actors (Player / Horse / Car) has a character movement, you can try to deactivate the “enable physic interaction” on it)
1 Like
3

Thank you for reply.
I found in the code Add impulse on location for projectile and remove it. Now it’s working and object is not moving on the hit.
If I disable “simulate physics” on vehicle than vehicle does not move when possessed.
Horse already have disabled simulate physics and still can hit the car.
So basically, I want when vehicle hit the character it won’t stop/block (and I will simulate ragdoll on character if needed). For some reason it’s not working.
For instance, condition for trigger ragdoll is: vehicle speed>=20, but than character only rotates for 90 degrees on hit. Something is really weird with UE4 physics.