How to make particle die with some conditions?
A: Particle will die when its Y position < 0.
B: Particle will die when it collides on a surface.
C: Particle will die when its speed higher or lower than a limit value. But if the option is "lower than a value" , it must has two conditions to listen, such as lifespan. For example, particle will die when its speed lower than 5 and lifespan higher than 10.