Particle Effects: CPU-Simulated Programmable Particle System
The s&box particle system is CPU-simulated (multithreaded) and fully programmable via components. You can emit particles manually, iterate and modify them at ru…
Razor Panels: HTML/CSS UI with C# in s&box PanelComponent System
s&box Razor Panels use web-like HTML/CSS syntax with C# for UI creation. Panels are rendered natively (not via HTML renderer) — the syntax is a convenience laye…
Collision and Triggers
Working with physics collisions and trigger volumes. Collision Components Basic Collision Trigger Volumes Triggers detect overlap without blocking movement: Col…
Particle Effects System
Particle Effects System CPU-simulated, fully controllable particle system for effects like fire, smoke, sparks, and explosions. Architecture The particle system…
Sandbox: NPC system — Schedule, Task, and Layer architecture
NPC System — Schedule, Task, and Layer Architecture The Sandbox NPC system uses a layered architecture: Layers handle continuous behaviours (navigation, senses,…
Custom Particle Controller - s&box Documentation
Official s&box documentation for the Particle System - visual effects. Particle Effect creates GPU-accelerated visual effects. Custom Particle Controllers scrip…
Sandbox: Physgun — grab, freeze, launch, and pull mechanics
Physgun — Grab, Freeze, Launch, and Pull Mechanics The Physgun () is a that lets players grab, move, freeze, and launch physics objects. It uses a struct to tra…
CharacterController — capsule movement, ground checks, and velocity control
CharacterController in s&box is a built-in s&box component for capsule-based movement. Unlike , you control velocity directly — the controller handles collision…
Sandbox: ControlSystem — vehicle seat and contraption control with IPlayerControllable
ControlSystem — Vehicle Seat and Contraption Control is a that drives components on contraptions. When a player sits in a , the system walks the connected contr…
WorldPanel and ScreenPanel — HUD overlays and 3D world-space UI with Razor PanelComponent
WorldPanel and ScreenPanel — UI in the World s&box UI uses (Razor) attached to either a (HUD overlay) or (3D world-space UI). The same component works with both…
s&box SoundHandle: Full Audio Playback Control API
s&box SoundHandle: Full Audio Playback Control API is returned by and gives full control over a playing sound. Playing Sounds SoundHandle Properties Stopping St…
s&box built-in component quick reference — rendering, physics, navigation, UI, and audio
s&box Component Quick Reference A cheat sheet of the most commonly used built-in components and what they do. Rendering Lighting Physics Navigation UI Audio Gam…
Physics Events - s&box Physics Documentation
Physics Events Receive callbacks for physics events in the scene. IScenePhysicsEvents Implement this interface on a component to receive scene-wide physics even…
Hotloading — live code reloading, IL fast path, and common pitfalls
Hotloading — Live Code Reloading s&box recompiles and live-reloads your assembly whenever you save a or file. You don't need to restart the editor for most chan…
FixedUpdate Internals: Step Counting, Spiral of Death Prevention, Time.Scope, and ApplyForce vs ApplyImpulse
FixedUpdate Internals: How the Fixed Timestep Works in s&box The s&box fixed update system uses a step-counting approach rather than accumulating time. This is …
Rigidbody Component: Networked Velocity, Proxy Physics Simulation, Impact Damage, and SmoothMove
Rigidbody Component: Networking, Velocity Sync, and Proxy Physics Simulation The component is the primary way to add physics simulation to a . It implements and…
Collider Component: Triggers, Surface Properties, Keyframe Bodies, Concave Shapes, and Tag Propagation
Collider Component: Triggers, Surface Properties, and Keyframe Bodies The abstract base class is the foundation for all physics colliders in s&box (, , , , ). T…