Unity - Manual: Velocity over Lifetime module reference

Unity Manual

Language : English

Unity 6.2 Alpha User Manual
- Documentation versions
- Offline documentation
- Trademarks and terms of use
What's new in Unity
- New in Unity 6
- New in Unity 6 Preview
- New in Unity 2023.2
- New in Unity 2023.1
Install and upgrade
- Install Unity
- Deploy Unity across your enterprise
  - Enable Unity installation by standard users (Windows)
  - Use Unity through web proxies
- Licenses and activation
- Upgrade Unity
The Editor interface
- The Project window
- The Scene view
  - Overlays
  - Scene view grid snapping
  - Pick and select GameObjects in the Scene view
  - Position GameObjects
  - Scene view navigation
  - Scene view Camera
  - Control a camera in first person
  - Scene visibility
  - Scene view Draw Modes and View Options overlays
  - Gizmos menu
  - Scene view context menu
  - Custom Editor tools
- The Game view
- Device Simulator
  - Device Simulator introduction
  - The Simulator view
  - Simulated classes
  - Adding a device
  - Extending the device simulator
- The Hierarchy window
- The Inspector window
  - Working in the Inspector
  - Focus an Inspector window
- Editing properties
- The Toolbar
- The status bar
- The Background Tasks window
- Console Window
- Additional windows
- Undo
- Search in the Editor
- Customizing your workspace
- Unity shortcuts
- Preferences
- Shortcuts Manager
- Project Settings
  - Use the Project Settings window
  - Audio
  - Editor
  - Graphics
  - Package Manager
  - Physics
  - Physics 2D reference
  - Player
    - Splash Image Player settings
  - Preset Manager
  - Quality
  - Script Execution Order settings
  - Tags and Layers
  - Time
  - UI Toolkit project settings
  - Version Control
- 2D and 3D mode settings
- Save your work
- Editor analytics
- Troubleshoot the Editor
- Unity Search
  - Search usage
  - Search tables
  - Search Providers
  - Search expressions
    - Functions reference
  - Creating a custom Search Provider
Packages and feature sets
- Unity's Package Manager
- Packages
- Creating custom packages
- Feature sets
Assets and media
- Asset workflow
- Unity's Asset Store
- Unity Accelerator
3D game development
- 2D or 3D projects
- 3D game development quickstart guide
  - Creating a 3D game
- Advanced best practice guides
2D game development
- Introduction to 2D
- Get started with 2D game development
- 2D renderer sorting
- Sprites
- Tilemaps in Unity
- 2D physics
- 2D game development in URP
  - 2D lighting in URP
  - Precise pixel scaling and rotation via the Pixel Perfect Camera in URP
XR
- Overview
- XR project set up
- Run an XR application
- XR graphics
- XR audio
  - Audio spatializers in XR
- Unity XR SDK
Multiplayer
- Unity multiplayer overview
- Use the Multiplayer Center
Platform development
- Cross-platform features and considerations
- Android
- Dedicated Server
- Embedded systems
- iOS
- Linux
- macOS
- tvOS
- Universal Windows Platform
- visionOS
- Web
- Windows
GameObjects
- Introduction to GameObjects
- GameObject fundamentals
- Primitive and placeholder objects
  - Types of 2D primitive GameObjects
- Components
- Models
  - Creating models outside of Unity
  - Importing models into Unity
- Meshes
- Prefabs
- Constraints
Scenes
- Introduction to scenes
- Creating, loading, and saving Scenes
- Work with multiple scenes in Unity
- Scene Templates
- Layers
- Tags
- Text-based Scene files
Cameras
- Introduction to cameras
- The camera view
- Using multiple cameras
- Changing resolution scale
  - Introduction to changing resolution scale
  - Dynamic Resolution
- Excluding hidden objects with occlusion culling
- Simulating real-world cameras with Physical Cameras
- Camera output
- Cameras in URP
- Cameras in the Built-In Render Pipeline
  - Set the camera background with Clear Flags in the Built-In Render Pipeline
  - Camera Inspector window reference for the Built-In Render Pipeline
- Troubleshooting cameras
World building
- Sky
- Terrain
- Terrain Tools package
Physics
- Built-in 3D Physics
Input
- Mobile Keyboard
- Unity XR Input
- Legacy Input
  - Input Manager
  - Mobile device input
- IME in Unity
UI systems
- Comparison of UI systems in Unity
- UI Toolkit
- Unity UI
- Immediate Mode GUI (IMGUI)
Animation
- Mecanim Animation system
- Legacy Animation system
  - Legacy Animation component
Audio
- Audio overview
- Audio files
- Tracker Modules
- Audio Mixer
- Native audio plug-in SDK
- Audio playlist randomization
- Audio Profiler module
- Ambisonic Audio
  - Develop an ambisonic audio decoder
- Audio Reference
Video and cutscenes
- Video sources
- Video Player
- Video Profiler module
Lighting
- Get started with lighting
  - Introduction to lighting
  - Choose a lighting setup
- Light sources
- Direct and indirect lighting
- Shadows
- Reflections
- Lighting in URP
- Lighting in the Built-In Render Pipeline
- Optimize lighting in the Built-In Render Pipeline
- Lighting reference
Materials and shaders
- Materials
- Prebuilt materials and shaders
- Custom textures
- Custom shaders
- Color and High Dynamic Range (HDR)
  - Color spaces
  - High dynamic range (HDR)
Visual effects
- Particle effects
- Decals
- Lens flares
- Light halos
  - Create and configure a halo light effect
  - Halo component reference
- Lines and trails
  - Rendering lines
  - Rendering trails
- Visual Effect Graph
Render pipelines
- Introduction to render pipelines
- Scriptable Render Pipeline fundamentals
- Choosing a render pipeline
- Rendering paths in Unity
- Using the Universal Render Pipeline
- Using the High Definition Render Pipeline
- Using the Built-In Render Pipeline
Post-processing
- Introduction to post-processing
- Post-processing effect availability reference
- Post-processing and full-screen effects in URP
Programming in Unity
- Get started with programming in Unity
- Environment and tools
- Object-oriented development
- Compilation and code reload
- Code optimization
  - Asynchronous programming with the Awaitable class
  - Job system
- Debugging and diagnostics
Optimization
- Memory in Unity
- Unity Profiler
- Profiling tools
  - Analyzing profiler traces
- Understanding optimization in Unity
- Graphics performance and profiling
Building and publishing
- Build profiles
- Incremental build pipeline
- Visual Studio C# integration
- RenderDoc integration
- Version control
- Command-line arguments
Unity Services
- Unity IAP
- Unity Distribution Portal
Troubleshooting
Glossary

Property	Function
Linear X, Y, Z	Linear velocity of particles in the X, Y and Z axes.
Space	Specifies whether the Linear X, Y, Z axes refer to local or world space.
Orbital X, Y, Z	Orbital velocity of particles around the X, Y and Z axes.
Offset X, Y, Z	The position of the center of orbit, for orbiting particles.
Radial	Radial velocity of particles away from/towards the center position.
Speed Modifier	Applies a multiplier to the speed of particles, along/around their current direction of travel.

Unity Manual

Velocity over Lifetime module reference

Properties

Additional resources