Use this module on subemitters. Each particle in the parent system can spawn particles in the subemitter. This module reads the velocity from the parent particle and controls how the speed of the subemitter particles reacts to that velocity over time.
This module is part of the Particle SystemA component that simulates fluid entities such as liquids, clouds and flames by generating and animating large numbers of small 2D images in the scene. More info
See in Glossary component. When you create a new Particle System GameObjectThe fundamental object in Unity scenes, which can represent characters, props, scenery, cameras, waypoints, and more. A GameObject’s functionality is defined by the Components attached to it. More info
See in Glossary, or add a Particle System component to an exiting GameObject, Unity adds the Inherit Velocity module to the Particle System. By default, Unity disables this module. To create a new Particle System and enable this module:
Since this module is part of the Particle System component, you access it through the ParticleSystem class. For information on how to access it and change values at runtime, see the Inherit Velocity module API documentation.
For some properties in this section, you can use different modes to set their value. For information on the modes you can use, see Varying properties over time.
Property | Function |
---|---|
Mode | Specifies how the emitter velocity is applied to particles |
Current | The emitter’s current velocity will be applied to all particles on every frame. For example, if the emitter slows down, all particles will also slow down. |
Initial | The emitter’s velocity will be applied once, when each particle is born. Any changes to the emitter’s velocity made after a particle is born will not affect that particle. |
Multiplier | The proportion of the emitter’s velocity that the particle should inherit. |
This effect is very useful for emitting particles from a moving object, such as dust clouds from a car, smoke from a rocket, steam from a steam train’s chimney, or any situation where the particles should initially be moving at a percentage of the speed of the object they appear to come from. This module only has an effect on the particles when Simulation Space is set to WorldThe area in your scene in which all objects reside. Often used to specify that coordinates are world-relative, as opposed to object-relative.
See in Glossary in the Main module.
It is also possible to use curves to influence the effect over time. For example, you could apply a strong attraction to newly created particles, which reduces over time. This could be useful for steam train smoke, which would drift off slowly over time and stop following the train it was emitted from.
Unity calculates the emitter’s velocity in one of two ways:
* Based on the velocity of an attached RigidbodyA component that allows a GameObject to be affected by simulated gravity and other forces. More info
See in Glossary component
* Based on how far the Particle System’s Transform componentA Transform component determines the Position, Rotation, and Scale of each object in the scene. Every GameObject has a Transform. More info
See in Glossary travelled during the current frame
To specify the method Unity uses, see the Main module’s Emitter Velocity property:
When you visit any website, it may store or retrieve information on your browser, mostly in the form of cookies. This information might be about you, your preferences or your device and is mostly used to make the site work as you expect it to. The information does not usually directly identify you, but it can give you a more personalized web experience. Because we respect your right to privacy, you can choose not to allow some types of cookies. Click on the different category headings to find out more and change our default settings. However, blocking some types of cookies may impact your experience of the site and the services we are able to offer.
More information
These cookies enable the website to provide enhanced functionality and personalisation. They may be set by us or by third party providers whose services we have added to our pages. If you do not allow these cookies then some or all of these services may not function properly.
These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site. They help us to know which pages are the most and least popular and see how visitors move around the site. All information these cookies collect is aggregated and therefore anonymous. If you do not allow these cookies we will not know when you have visited our site, and will not be able to monitor its performance.
These cookies may be set through our site by our advertising partners. They may be used by those companies to build a profile of your interests and show you relevant adverts on other sites. They do not store directly personal information, but are based on uniquely identifying your browser and internet device. If you do not allow these cookies, you will experience less targeted advertising. Some 3rd party video providers do not allow video views without targeting cookies. If you are experiencing difficulty viewing a video, you will need to set your cookie preferences for targeting to yes if you wish to view videos from these providers. Unity does not control this.
These cookies are necessary for the website to function and cannot be switched off in our systems. They are usually only set in response to actions made by you which amount to a request for services, such as setting your privacy preferences, logging in or filling in forms. You can set your browser to block or alert you about these cookies, but some parts of the site will not then work. These cookies do not store any personally identifiable information.