Download

Get Velocity Never Zero's Out

Development Discussion Blueprint Visual Scripting
#1

Hello, been fooling around with Unreal a while now but I’ve come across something I’d more or less just like some reasoning behind.

I’ve created a simple BP that will print the velocity of a projectile fired from a gun to the screen. However, once the projectile comes to a stop, I don’t destroy it or even turn the physics off on it. But it still shows that the projectile has velocity even though it doesn’t. Is this possibly a bug/limitation in the engine code? I would expect that when something stops moving, “Get Veolocity” would report that XYZ of the Vector is 0.

4c563a171e284ed221a8aaed684495cfa4150f38.jpeg
This is the BP snippet I’m using.
ffbed2ac838573aa2c8edd7fe39fc64462cd2599.jpeg
This is what is still displayed after the projectile stops. I would expect it to reach 0.

Thanks in advance!

#2

Think I figured this one out on my own…

If my assumptions are correct. When using a Projectile component in the BP it simulates physics on the root component until it comes to a stop. Once it’s come to a stop all physics processing stops. So in that instant that the physics processing stops, whatever the last velocity the object had is what gets stuck in the Vector variable never to be updated again… Seems like a good idea in theory but we should have the option in the Projectile component to not have physics end on the projectile.

#3

Really figured it out this time. So the physics stops after the first bounce and after the velocity has reached a number below the “Bounce Velocity Stop Simulating Threshold” setting in the Projectile component. If you set that to 0 then the velocity will eventually 0 out.

Thank you forums for being my Duck, haha

Maybe this will help someone out in the future, who knows.

#4

Thank you for posting the solution that you found! It’s annoying when you find a thread through a Google search and the OP found a solution but didn’t post it. :slight_smile: