godot-camera-systems

name

godot-camera-systems

description

Expert patterns for 2D/3D camera control including smooth following (lerp, position_smoothing), camera shake (trauma system), screen shake with frequency parameters, deadzone/drag for platformers, look-ahead prediction, and camera transitions. Use for player cameras, cinematic sequences, or multi-camera systems. Trigger keywords: Camera2D, Camera3D, SpringArm3D, position_smoothing, camera_shake, trauma_system, look_ahead, drag_margin, camera_limits, camera_transition.

NEVER Do

• NEVER use global_position = target.global_position every frame — Instant position matching causes jittery movement. Use lerp() or position_smoothing_enabled = true.
• NEVER use offset for permanent camera positioning — offset is for shake, sway, or temporary recoil effects only. Use position for permanent framing.
• NEVER forget limit_smoothed = true for Camera2D — Hard boundaries cause jarring visual stops.
• NEVER enable multiple Camera2D nodes in the same viewport simultaneously — Only the last enabled camera takes precedence. Explicitly disable inactive cameras.
• NEVER use SpringArm3D without a collision mask — It will clip through terrain and walls. Set it to the world/environment layer.
• NEVER implement screen shake by randomizing position (or randf on offset as the whole system) — Use a dedicated Trauma/Noise system layered on follow (camera_shake_trauma_pro.gd).
• NEVER parent the Camera directly to a high-speed physics body as the default rig — Physics stutter or parent rotation causes motion sickness. Prefer RemoteTransform2D/3D / phantom decoupling with rotation sync disabled (remote_transform_decoupling.gd, phantom_decoupling.gd).
• NEVER use look_at() in 3D without a fallback for the 'Up' vector — Targets directly above/below flip the camera; use guards or Quaternion math.
• NEVER rely on SubViewport defaults for Mini-maps — Set render_target_update_mode to UPDATE_WHEN_VISIBLE or a lower fixed rate.
• NEVER use linear interpolation for Zoom — Prefer exponential lerp or Tween TRANS_CUBIC.

---

Parenting / Decoupling (resolved)

Rig	When	Script
Default: RemoteTransform / phantom	Player is CharacterBody / high-speed / rotates	remote_transform_decoupling.gd, phantom_decoupling.gd
Camera as child of player	Slow top-down / locked rotation / prototype only	Explicit caveat: disable if motion sickness or physics jitter appears; never combine with position-overwrite shake
SpringArm3D + Camera3D	Third-person occlusion	spring_lerp_camera_3d.gd — mask required

Available Scripts

MANDATORY: Read before implementing the matching behavior. No randf shake samples in project code.

• camera_shake_trauma_pro.gd — MANDATORY for any screen shake / impact juice.
• camera_shake_trauma.gd — Lighter trauma variant.
• remote_transform_decoupling.gd — MANDATORY default for physics-body follow.
• phantom_decoupling.gd — Alternate stable follow phantom.
• spring_lerp_camera_3d.gd — MANDATORY before custom 3D follow springs.
• deadzone_drag_margins.gd — Platformer drag/deadzone.
• camera_follow_2d.gd — Smooth 2D follow helpers.
• zoom_damping_controller.gd — Non-linear zoom.
• camera_state_machine.gd — Follow / Static / Cinematic transitions.
• cinematic_framing_logic.gd — Rule of thirds / lead room.
• minimap_viewport_manager.gd — SubViewport update modes.
• split_screen_setup.gd — Local multi camera viewports.
• first_person_sway.gd — FPS bob/sway on offset.
• juice_camera.gd — Combined juice helpers.
• framing_box_camera_2d.gd — Multi-target AABB framing + zoom fit.
• occlusion_aware_camera_3d.gd — Raycast occlusion when SpringArm is insufficient.
• trauma_debugger.gd — On-screen trauma decay curve (debug builds).

Expert Camera Architectures

1. Multi-target framing

Compute AABB of targets → lerp camera to center → zoom/distance to fit with margin. Keep juice shake on offset only. MANDATORY: framing_box_camera_2d.gd.

2. Occlusion (3D)

Prefer SpringArm3D with world collision mask; custom rigs use intersect_ray between ideal camera pos and target — occlusion_aware_camera_3d.gd (peer godot-raycasting-queries).

3. Trauma audit

Plot trauma decay (debug draw) while tuning camera_shake_trauma_pro.gd — wire trauma_debugger.gd to get_trauma(). Never validate feel with raw randf offset demos.

MANDATORY for multi-target framing, custom occlusion rigs, 2D/3D follow recipes, and cinematic transitions: camera-expert-patterns.md. Do NOT Load when golden-path scripts already cover your rig.

Reference

Progressive disclosure: open Official Documentation links only when researching a specific API; load Related Skills when routing to a peer domain — do not preload the whole lattice.

Official Documentation

• Camera2D — Position/drag margins, limit_* / limit_smoothed, and position_smoothing_* that underpin 2D follow, deadzones, and level bounds.
• Camera3D — Projection, look_at, current-camera rules, and environment overrides used by third-person, FPS, and cinematic 3D rigs.
• Third-person camera with spring arm — Why parenting a Camera3D alone clips geometry and how SpringArm3D length/shape keep the view clear.
• SpringArm3D — Collision mask, margin, and spring length API required before third-person occlusion pulls feel trustworthy.
• Using Viewports — Multiple cameras, SubViewport architecture, and when split-screen / minimap views share or isolate worlds.
• SubViewport — render_target_update_mode and audio-listener flags that decide minimap and local-coop GPU/audio cost.
• RemoteTransform2D — Decouple camera position from player rotation/scale without parenting the camera under a physics body.
• Interpolation — Lerp / exponential follow and zoom damping math so custom cameras do not feel robotic or jittery.
• Physics interpolation (introduction) — Why cameras following CharacterBody motion stutter when render and physics ticks disagree.
• FastNoiseLite — Coherent noise for trauma/offset shake instead of raw randf position thrashing.
• PathFollow2D — Progress-ratio driven cinematic paths when Tweening a camera along a Path2D.
• Mouse and input coordinates — Wheel zoom and mouse-look coordinate spaces so FPS pitch/yaw and tactical zoom stay consistent across viewports.

Related Skills

Prerequisites

• godot-project-foundations — Stretch mode, default viewport, and input map setup decide how Camera2D limits and SubViewport sizes behave before any follow script runs.
• godot-gdscript-mastery — Typed nodes, _physics_process vs _process, and Tween/await patterns used by state machines and spring follow.
• godot-input-handling — Captured mouse, look axes, and mouse-wheel events feed FPS look, zoom damping, and camera orbit controls.

Complements

• godot-tweening — Camera transitions between Follow/Static/Cinematic should use Tweens (ease/trans), not hard snaps or linear zoom.
• godot-characterbody-2d — Look-ahead and deadzone cameras need real velocity / floor state from the platformer body they frame.
• godot-physics-3d — SpringArm collision layers and CharacterBody3D motion are the 3D counterparts to stable third-person and FPS sway parents.
• godot-raycasting-queries — Custom occlusion-aware cameras that do not use SpringArm still need correct intersect_ray masks and excludes.
• godot-state-machine-advanced — Formalize Follow/Static/Cinematic (and cutscene ownership) when camera_state_machine outgrows a simple enum.
• godot-signal-architecture — Trauma add, cutscene handoff, and multi-target framing should be signal-driven so gameplay never reaches into camera internals.

Downstream / consumers

• godot-performance-optimization — Escalate when SubViewport minimaps, split-screen, or always-on secondary cameras still dominate frame time after update-mode tuning.
• godot-monte-carlo-balancer — Simulate shake intensity, zoom fairness, and multi-target framing so camera juice never hides hitboxes or competitive information.
• godot-adapt-single-to-multiplayer — Consumes split-screen SubViewport patterns when local coop needs per-player cameras and listener ownership.
• godot-debugging-profiling — Use monitors and visualizers to prove camera jitter sources (physics tick, RemoteTransform, trauma) before rewriting follow math.

Master

• godot-master — Library router and mirrored module entry; open when discovering which Domain Skill owns a cross-cutting camera concern.