I have a Player character that is moved by adding forces to it’s rigid body. I made sort of a flamethrower using particles from Unity 3.5 (not shuriken). I took a velocity vector from the player character every frame, and set the world velocity of the particles every frame. This way if the character is moving 100km/h forward, the particles don’t stay behind him (even if in the real world they would ;)).
Right now I switched to Unity 4, and I’m trying to redo the flamethrower using shuriken. It is a better system in every way, except using “Inherit velocity” produces very strange and random results. Literally, the particles go in random directions when I change velocities of the player with controls. Instead of adding the player’s world velocity to their local velocities they go crazy whenever I press a direction button.
I mean, most of the time they go in proper direction with proper velocity (inherited from player), but when I change the veloctiy with controls, 20% (more less) or sometimes all particles for 0,3-1s go in random direction. Mostly in world Z axis, but sometimes in X or Y.
I’m building an exhaust-flame from a spaceship with the Shuriken particle system. What I want to a achieve is that nice kind of bend in the flame when you turn. To do this the smoke and fire need to inherit the velocity of the craft. Else the flame will make a sharp angle, as opposed to the wanted bend, right at the engine exhaust.
It’s just that the inherit velocity doesn’t work properly. When I turn it on most particles will go the right way, backward, but a whole lot will be sent out in front of the craft or to the sides (when turning). The effect is worse at higher velocities.
Who are you? Are you support, and if so why do you only have one post?
If you are support then please tell me what you mean with a bug report? I thought I just wrote one here!
I have exactly the same problem as Switchice. I am also building a spaceship and cannot get Inherit Velocity to work correctly.
At low speeds the particle system looks ok (not as good as in local simulation space, but ok). At higher speeds it looks really strange and also emits in the wrong direction.
I’m having the exact same trouble with the latest build (Unity 4.1.1f4) Causing me real problems with spray from a boat puffing in the opposite wrong direction at regular intervals just like Lorodion’s picture. I wonder if this is a new problem or has always been there?
This has not been fixed yet as of version 4.3.0f4.
I have also sent a bug report to Unity so that they can fix this!
If anyone else wants to reproduce this, download my project from here: 1439904–77231–$unityShurikenBug.zip (103 KB)
Zoom/pan with the mouse, wait for a few seconds and you’ll see the error appear.
Also trying to do a spaceship thruster effect, and when I enable the effect, the first few particles emit with a completely wrong velocity. Then the effect behaves until I stop it and restart it - where it does the same thing
Has this really been a bug for a year and a half? It makes the particle system almost useless on any moving object. And there’s no way to access most of the particle system via script? I could make this work if I could just set the initial velocity each frame in the script.
Are there any news on this bug? i’m having the same problems when trying to create tyre smoke for cars, most particles will behave as expected but a few will shoot ahead of the car. As other have noted the problem is more notable at high speeds.
Is there any progress on this bug ? I saw you wrote in another thread, inherit velocity at 1 should make the particle stick to the parent 100%. Currenty thats not how the inherit velocity works at all. It you put it to inherit velocity 1, the particle will fly off in all kinds of directions, depending on the speed you move. So, essentially you cant really do anything decent with inherit velocity right now. The only thing you can achieve right now is some movement to the world particles on a low value, but you don’t really have any decent control over it. This bug has been existing now ever since Shuriken was released, and currently you cannot make any particle behvave like a tail or something similar to that. It’s either world velocity where its stuck in the emitting space (with its local movement added) or its local and completely linked. So theres a lot of situations you have to find a certain workaround and never get the result you are aiming for.
Anyone found any workaround for this I would be very interested to hear. But most of all I wish Unity could fix this bug soon! I’m experiencing situations this is needed frequently.
