PcoWSkbVqDnWTu_dm2ix
We use cookies on this site to enhance your user experience
Collapse Sidebar

Speed

ParticleEmitter

NumberRange

The Speed property determines the random range of velocities that newly emit particles may have. It is measured in studs per second using a DataType/NumberRange. The velocity is chosen upon emission, and is applied in the ParticleEmitter/EmissionDirection. Negative speed values will cause particles to travel in reverse.

Below is an animation of two default ParticleEmitters; the left has the default Speed of 5. The right one has the Speed range set to [20, 20], so its particles emit at a constant speed of 20.
Two default ParticleEmitters, the right has a speed of 20.

ParticleEmitter/VelocityInheritance, ParticleEmitter/Acceleration and ParticleEmitter/Drag will affect a particle’s speed over its lifetime. Changing Speed will not affect already existing particles - they will retain whatever speed they have already.


Code Samples


Creating a Particle Emitter from Scratch

This rather lengthy code sample shows how every property of a ParticleEmitter can be set, including DataType/NumberRange, DataType/NumberSequence and DataType/ColorSequence properties. Below is how the ParticleEmitter should after every property is set. Try playing around with the different properties to customize how the effect looks!

The final product