Example: The particle system is a lightning bolt, and the lightning bolt has a starting point and an ending point, that is, the particle system has Source and Target modules. You are now ready to use the blueprint to control the start and focus of lightning

1. Expose the corresponding variables of the particle system

The source, for example

First select the Distribution Vector Particle Parameter at 1 and then set a name for the Parameter at 2 and set the minimum and maximum inputs and outputs at 3

2. Create a particle system in the blueprint and set parameters

Use the set vector parameter to set the values of the parameters

Note that 1 must be the same as the parameter name set in the particle system and enter the value at 2