poormans-camera-rs | The Poor Man's 3D Camera Rig in Pure Rust

poormans-camera-rs — Second-Order Spring-Damper 3D Camera Rig & Collision Solver in Rust

poormans-camera-rs is a lightweight Rust camera controller for 3D games featuring critically damped spring motion, orbit smoothing, and spherical raycast wall avoidance. It prevents camera clipping through geometry while smoothly blending field-of-view and look-at targets across gameplay states.

$ cargo add poormans-camera-rs

GitHub ↗

Controls: WASD to drive Target Cube • Left Click & Drag to Orbit Camera • Scroll to Zoom

Player POV (Rendered)

2nd-Order Spring Dynamics

Natural Frequency (ω)10.0 rad/s

Damping Ratio (ζ)1.00

Sphere-Cast Occlusion

Ideal Distance5.0 m

Near Clip Sphere Radius (R_near)0.35 m

Recovery Speed (Hysteresis)4.0 m/s

Shoulder Offset (X)0.5 m

Camera Telemetry

Occlusion State: CLEAR

Ideal Distance: 5.00 m

Current Pulled Distance: 5.00 m

Spring Position Lag: 0.00 m

Speed-Dilation FOV: 60.0°

Performance Benchmarks (vs Unity C#)

Full Rig Frame Step: 135.18 ns (7.4M/s)

Unity LateUpdate: ~15-25 µs (110× faster)

2nd-Order Spring: 118.04 ns (8.5M/s)

Sphere-Cast Occlusion: 130.87 ns (20 cols)

Sphere-AABB CCD: 9.83 ns (101M/s)

View Full Benchmarks Report →