A custom Retro Arena FPS character controller for Unity. Saves months of dev time by delivering flawless bunnyhopping, zero friction wall sliding, and ultra responsive classic physics out of the box.Arena FPS Movement SystemKinematic movement framework for Unity designed for classic, fast-paced FPS movement. Built without Unity's built-in CharacterController or physics forces, relying instead on a custom collide-and-slide sweep solver running on a fixed-rate tick loop.Key CapabilitiesQuake-style movement physics (air strafing, ground acceleration, friction, and speed caps).Custom CapsuleCastNonAlloc collision solver with velocity plane clipping.Fixed tick rate manager decoupled from rendering frame rate.ScriptableObject configuration for all movement and physics parameters.Abstract controller base class to decouple input handling from motor logic.Built-in mechanics for crouch blending (with overhead clearance checks), sprinting, ladders, step-up/step-down handling, coyote time, jump buffering, and noclip.Script ArchitectureAFPSMotorThe primary movement controller. Runs character state updates (Walking, Sprinting, Crouching) and physics calculations driven by AFPSTickManager.Locomotion: Calculates ground friction, ground acceleration, air acceleration, slope limits, and terminal velocity.Step Logic: Uses StepAndSlide to step over bumps up to MaxStepHeight, and StepDown to stay grounded when running down stairs or slopes.Interactions: Handles ladder climbing based on relative angles, ceiling collision checks prior to standing up, and noclip state.Events: Exposes OnJumped, OnLanded, and OnStateChanged events for UI, camera, or audio hooks.AFPSCollisionSolverA custom physics solver that handles capsule collision testing and velocity deflection manually.Capsule Sweeps: Executes CapsuleSweep and GroundSweep via Physics.CapsuleCastNonAlloc using skin-width buffers to prevent floating-point sticking or wall clipping.Plane Clipping: Uses ClipVelocity and a multi-plane loop (CollideAndSlide) to project movement vectors along intersecting geometry normals.AFPSTickManagerA persistent singleton that controls movement tick timing.Uses a delta-time accumulator set to a target frequency (default 125Hz) so movement behaves identically across varying frame rates.Clamps max ticks per frame to protect against physics loops during lag spikes.AFPSSettingsA ScriptableObject containing all configurable parameters:Walk, sprint, crouch, air, and climb speeds.Acceleration rates, air acceleration caps, friction, and stop speeds.Gravity, max slope angle, max step height, terminal velocity, and noclip speed.Jump force, coyote time, jump buffer duration, and raycast padding margins.AFPSControllerBaseAn abstract input abstraction layer.Stores input vectors (MoveInput, LookRotation) and movement flags (Jump, Crouch, Sprint, Noclip).Allows swapping between legacy Input, the New Input System, or AI drive logic without modifying AFPSMotor.___________________________________________________________________________________________User GuideWebDemoUnity Compatibility: Unity 2021.3 LTS or newer.Dependencies: None (Pure C# script package).Component Requirements: Requires CapsuleCollider and kinematic Rigidbody components (auto-configured via script attributes).
