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By Design
Votes
1
Found in
2018.4
2019.2
2019.2.6f1
2019.3
2020.1
Issue ID
1191639
Regression
No
Trail Renderer does not stop emitting when TrailRenderer.emitting is set to false
How to reproduce:
1. Open the user-submitted project
2. Enter Play mode and wait for the animation to finish
Expected result: Trail Renderer stops emitting on the position where the Animation finished
Actual result: Trail Renderer stops emitting when the Cube is moved to the start position
Reproducible with: 2018.4.12f1, 2019.2.10f1, 2019.3.0b7, 2020.1.0a9
Notes:
TrailRenderer.emitting was not introduced in Unity 2017.4, therefore the issue was not reproducible.
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Resolution Note:
When emitting is set to false, the width will taper towards zero at the next added point.
I appreciate this doesn't give you the effect you want, but changing it risks breaking things for other users.
Luckily there is a simple trick to get the behaviour you want. Just add an extra position when you set emitting to false, to force the trail to instantly reduce to zero width:
void Update()
{
if (!_animation.isPlaying)
{
_trailRenderer.emitting = false;
_trailRenderer.AddPosition(_trailRenderer.transform.position); // NEW CODE
transform.position = Vector3.zero;
enabled = false;
}
}
Hope it helps!