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Vibe Coder 3D - Feature Roadmap

🎨 Visual-First Development Strategy Prioritizes highly visible features for immediate user satisfaction and motivation.

Legend: ✅ Complete | 🚧 Partial/In Progress | ❌ Not Implemented | ⚠️ Critical Gap

📋 For detailed documentation of completed features, see IMPLEMENTED-FEATURES-LIST.md

📊 Effort × Impact Matrix

Quick Wins (High Impact, Low Effort) ⚡

Feature Impact Effort Status Priority
Material Dedup (Rust) 🟡 Important 3-5 days ❌ Missing P1
Complete UI API (Rust) 🔴 Critical 1 week 🚧 Last API P0
FXAA (Rust) 🟡 Important 1 week 🚧 Partial P1
Mesh Optimization (Rust) 🟡 Important 1 week ❌ Missing P2
CSM Shadows (Rust) 🟡 Important 1-2 weeks 🚧 Partial P2
Dynamic Batching 🟡 Important 3-5 days 🚧 Partial P2
LOD Variant Gen (Rust) 🟡 Important 1 week ❌ Missing P2

Strategic Investments (High Effort, High Impact) 🎯

Feature Impact Effort Status Priority
Particle/VFX System 🔴 Critical 2-4 weeks ❌ Missing P0
Custom Shader System 🔴 Critical 2-3 weeks ❌ Missing P0
Character Controller 🔴 Critical 1-2 weeks ✅ Near Complete P0
Undo/Redo System 🔴 Critical 2-3 weeks ❌ Missing P1
Skinned Mesh Animation 🟡 Important 4-6 weeks 🚧 Partial P2
Navigation/Pathfinding 🟡 Important 4-6 weeks ❌ Missing P3

Low Priority Items 📋

Feature Impact Effort Status Notes
Decals 🟢 Nice 2-3 weeks ❌ Missing Visual polish
Terrain Tools (Editor) 🟢 Nice 3-4 weeks ❌ Missing Rust has basic terrain
Build System Multi-platform 🟡 Important 4-6 weeks 🚧 Partial Web builds work
Advanced Profiler 🟢 Nice 2-3 weeks 🚧 Partial Basic profiling works
Input Rebind System (Rust) 🟢 Nice 1-2 weeks ❌ Missing TS has rebind
Audio System (Rust) 🟡 Important 2-3 weeks 🚧 Skeleton TS complete with Howler.js

Already Complete ✅

Feature Impact Notes
BVH Spatial Acceleration 🔴 Critical Full parity, 10-100x speedup
LOD System 🔴 Critical Full parity, 3 quality tiers
Physics Integration 🔴 Critical Complete Rapier3D parity
Input System 🔴 Critical Full parity, 19 methods
Transform & Scene Graph 🔴 Critical Complete hierarchy both systems
PBR Materials 🔴 Critical Professional pipeline
Prefab System 🔴 Critical Runtime instantiation + Lua API
Lighting System 🔴 Critical Directional, point, spot + shadows
Post-Processing (TS) 🟡 Important Tone mapping, bloom, FXAA

🏆 What's Already Done (Quick Summary)

Core Systems (100% Complete):

  • ✅ Transform & Scene Graph - Full hierarchy in both TS and Rust
  • ✅ Entity-Component System - Mutable ECS with runtime CRUD (35 tests)
  • ✅ Physics Integration - Full Rapier3D with complete parity
  • ✅ PBR Materials - Professional material pipeline
  • ✅ Lighting System - Directional, point, spot lights with shadows
  • ✅ Input System - Full parity with action mapping (19 methods)
  • ✅ Prefab System - Runtime instantiation with Lua API

Scripting (96% Complete):

  • ✅ TypeScript: 14/24 APIs (Entity, Transform, Input, Audio, Prefab, etc.)
  • ✅ Rust: 24/25 APIs (Only UI API remaining) - Major Achievement!

Optimization (Complete Parity):

  • ✅ BVH Spatial Acceleration - 10-100x raycasting speedup (TS + Rust, scripting integration complete)
  • ✅ LOD System - 3 quality tiers (100%, 75%, 35%) (TS + Rust)
  • ✅ Asset Pipeline - 60-80% file size reduction (TS only)
  • ✅ Scene Serialization - 60-80% compression (TS only)

Overall Progress: 48% complete, 32% partial, 20% missing

Recent Major Achievement (2025-11-07):

  • ✅ Character Controller unified system complete (Phases 1-3 + partial Phase 4)
  • ✅ 65% complete (production-ready core, pending UX polish and comprehensive tests)

🎯 Sprint Planning Overview

Sprint Focus Duration Features Impact User Excitement
Sprint 1 Visual Impact 3-4 weeks Particles + Complete Character Controller 🔴 Critical ⭐⭐⭐⭐⭐ WOW!
Sprint 2 Visual Polish 2-3 weeks Post-processing + Custom Shaders 🟡 Important ⭐⭐⭐⭐ Professional!
Sprint 3 Performance 1-2 weeks Material Dedup + Asset Pipeline 🟡 Important ⭐⭐⭐ Optimized!
Sprint 4 Professional Tools 3-4 weeks Undo/Redo + Complete APIs 🟡 Important ⭐⭐⭐ Efficient!

Total Timeline: 9-13 weeks to achieve impressive, professional results

Progress After Each Sprint:

  • Sprint 1: Explosions, fire, smoke effects + fully walkable scenes with slope/step handling
  • Sprint 2: Professional anti-aliasing and custom visual effects
  • Sprint 3: Memory optimization + asset pipeline (LOD/BVH already done ✅)
  • Sprint 4: Complete professional development workflow

🧱 Core Scene Architecture

Transform & Scene Graph (★★★★★)

Feature Editor (TS) Rust Engine Notes
Parent-child hierarchy ✅ ✅ Complete in both, full scene graph
Local/World matrices ✅ ✅ Transform hierarchy management
Dirty flag propagation ✅ ✅ Optimized updates in both
Transform utilities ✅ ✅ Degree/radian conversion handled

Status: ✅ COMPLETE - Full feature parity

Entity-Component System (★★★★★)

Feature Editor (TS) Rust Engine Notes
Component registration ✅ ✅ BitECS in TS, ComponentRegistry in Rust
System iteration ✅ ✅ Full system in both
Prefab composition ✅ ✅ Full TS prefabs, complete Rust API support
Entity lifecycle ✅ ✅ Complete in both (SceneManager in Rust)
Component serialization ✅ 🚧 60-80% compression in TS
Runtime CRUD ✅ ✅ Full create/update/destroy in both systems

Status: ✅ EXCELLENT - Both systems have full mutable ECS with runtime entity CRUD Files: TS: src/core/lib/ecs/, Rust: rust/engine/crates/scene/, rust/engine/crates/ecs-manager/

🎥 Rendering Pipeline

Mesh Rendering (★★★★★)

Feature Editor (TS) Rust Engine Notes
Static mesh batching ✅ ✅ Instanced rendering in Rust
Skinned mesh support 🚧 ❌ GLTF support partial
Material binding system ✅ ✅ Material manager in both
GLTF/GLB loading ✅ ✅ Full pipeline support
Mesh optimization ✅ ❌ glTF-Transform optimization (60-80% reduction)

Status: 🚧 PARTIAL - Core rendering complete, skinned meshes missing

PBR Materials (★★★★★)

Feature Editor (TS) Rust Engine Notes
Base maps (albedo, metallic, roughness, normal, AO) ✅ ✅ Full PBR pipeline
Shader parameters ✅ ✅ Uniforms for tinting, emissive
SRGB & linear workflow ✅ ✅ Physically consistent lighting
Material deduplication ✅ ❌ TS optimization only
Material overrides ✅ ✅ Runtime material changes

Status: ✅ COMPLETE - Full PBR support in both systems

Lighting (★★★★★)

Feature Editor (TS) Rust Engine Notes
Directional light (sun) ✅ ✅ Core global illumination
Point/spot lights ✅ ✅ Full light types
Light attenuation ✅ ✅ Inverse-square with cutoff
Shadow support ✅ ✅ Enhanced lighting system

Status: ✅ COMPLETE - Full lighting parity

Shadows (★★★★☆)

Feature Editor (TS) Rust Engine Notes
Cascaded shadow maps (CSM) ✅ 🚧 TS complete, Rust partial
Spot light shadows ✅ ✅ Localized sources
PCF or PCSS blur 🚧 🚧 Basic shadow softening

Status: 🚧 PARTIAL - Basic shadows work, CSM needs completion in Rust

Post-Processing (★★★★☆)

Feature Editor (TS) Rust Engine Notes
Tone mapping & exposure ✅ ✅ Realistic brightness range
Bloom ✅ ✅ HDR effect
Antialiasing (FXAA/TAA) ✅ 🚧 TS complete, Rust partial
Post-processing pipeline ✅ ✅ Full effect system

Status: ✅ COMPLETE - Core post-processing functional

⚙️ Performance Essentials

Culling (★★★★☆)

Feature Editor (TS) Rust Engine Notes
Frustum culling ✅ ✅ BVH-accelerated in both
Bounding volumes (AABB/sphere) ✅ ✅ Full AABB system
BVH spatial acceleration ✅ ✅ 10-100x raycasting speedup
Occlusion hints ❌ ❌ Not implemented

Status: ✅ COMPLETE - Full BVH parity achieved Files: TS: src/core/lib/rendering/BVHManager.ts, Rust: src/spatial/bvh_manager.rs, src/spatial/mesh_bvh.rs, src/spatial/scene_bvh.rs

LOD (★★★★☆)

Feature Editor (TS) Rust Engine Notes
Distance-based model swaps ✅ ✅ Full parity
3 quality tiers ✅ ✅ original (100%), high (75%), low (35%)
Crossfade/blend 🚧 🚧 Basic transitions
Simplified collider fallback ❌ ❌ Not implemented
LOD variant generation ✅ ❌ Auto-generated during optimization

Status: ✅ COMPLETE - Full parity in both systems Files: TS: src/core/lib/rendering/LODManager.ts, Rust: src/renderer/lod_manager.rs, src/renderer/lod_selector.rs

Instancing / Batching (★★★★☆)

Feature Editor (TS) Rust Engine Notes
GPU instancing ✅ ✅ Efficient identical mesh drawing
Dynamic batching 🚧 🚧 Basic implementation
Material key sorting ✅ 🚧 Reduces state changes

Status: 🚧 PARTIAL - Basic instancing works, needs optimization

🕹️ Gameplay Foundation

Physics (★★★★★)

Feature Editor (TS) Rust Engine Notes
Collision shapes (box, sphere, capsule, convex hull) ✅ ✅ Full shape support
Rigidbodies (gravity, impulses, constraints) ✅ ✅ Complete physics sim
Sweep tests ✅ ✅ Movement validation
Physics materials (friction, restitution, density) ✅ ✅ Full material properties
Transform sync ✅ ✅ Physics-to-rendering sync

Status: ✅ COMPLETE - Full Rapier3D integration in both systems Files: TS: src/core/components/physics/, Rust: rust/engine/crates/physics/

Raycasting (★★★★★)

Feature Editor (TS) Rust Engine Notes
Line hits (shooting, picking, camera focus, AI vision) ✅ ✅ BVH-accelerated in both
Layer filtering ✅ 🚧 Optimize queries
Hit info struct ✅ ✅ Decals, effects, impact logic

Status: ✅ COMPLETE - BVH-accelerated raycasting available in both TS and Rust (10-100x faster) Files: TS: src/core/lib/rendering/BVHManager.ts, Rust: rust/engine/src/spatial/bvh_manager.rs, rust/engine/src/spatial/scripting_raycaster.rs

Character Controller (★★★★★)

Feature Editor (TS) Rust Engine Notes
Capsule collider ✅ ✅ Full capsule physics support (fix applied 2025-11-07)
Scripting API ✅ ✅ entity.controller (isGrounded, move, jump, setSlopeLimit, setStepOffset)
Script API routing ✅ 🚧 Routes through unified controller (no direct RigidBody manipulation)
Basic movement ✅ ✅ WASD + Space input handling
Physics collisions ✅ ✅ Uses Rapier kinematic bodies - collisions work
Slope/step handling ✅ 🚧 TS complete with KinematicCharacterController, Rust uses basic kinematic bodies
Ground snapping ✅ 🚧 TS complete with KinematicCharacterController, Rust uses basic kinematic bodies
Auto/Manual control modes ✅ 🚧 Auto (WASD) + Manual (script) modes implemented
Deferred registration system ✅ ❌ 3-frame retry mechanism for physics registration timing
Collision filters & predicates ✅ 🚧 Layer-based collision filtering applied
Stop/Play reliability ✅ ❌ Registration race condition fixed (2025-11-07)
WASM stability ✅ ❌ Rapier WASM crash on stop/play fixed (2025-11-07)
Unified system architecture ✅ ❌ CharacterControllerAutoInputSystem deprecated, unified CharacterControllerSystem in use
Inspector UX 🚧 ❌ Input mapping UI pending (Phase 5), basic component inspector works

Status: ✅ NEAR COMPLETE - TS has production-ready unified controller with Rapier KinematicCharacterController (Phases 1-3 complete, Phase 4 partial). Remaining: Inspector UX (Phase 5), comprehensive tests (Phase 6). Rust uses basic kinematic bodies (missing advanced features).

Recent Updates (2025-11-07):

  • ✅ Unified CharacterControllerSystem (deprecated Auto system)
  • ✅ Script API routes through controller (Phase 2)
  • ✅ Deferred registration with retry mechanism (Phase 3)
  • ✅ Registration race condition fixed
  • ✅ Rapier WASM crash fixed
  • ✅ Capsule collider shape corrected

Files:

  • TS: src/core/systems/CharacterControllerSystem.ts (unified), src/core/physics/character/, src/core/lib/scripting/apis/CharacterControllerAPI.ts
  • Rust: rust/engine/src/app_threed.rs, rust/engine/crates/scripting/src/apis/physics_api.rs

Documentation: docs/character-controller-implementation-summary.md, docs/PRDs/editor/character-controller-gap-closure-prd.md

Navigation (★★★★☆)

Feature Editor (TS) Rust Engine Notes
Navmesh baking ❌ ❌ Not implemented
Pathfinding (A*) ❌ ❌ Not implemented
Agent avoidance ❌ ❌ Not implemented

Status: ❌ NOT IMPLEMENTED

Input Mapping (★★★★★)

Feature Editor (TS) Rust Engine Notes
Actions vs. axes ✅ ✅ Full action system in both
Rebind system ✅ ❌ TS only
Composite bindings (key/mouse/gamepad) ✅ ✅ WASD→Vector2, full composite types
Keyboard & mouse input ✅ ✅ Complete - all 19 methods
Frame-based state tracking ✅ ✅ Down/Pressed/Released states
Action maps enable/disable ✅ ✅ Dynamic map switching

Status: ✅ COMPLETE - Full input parity achieved (2025-01-24) Files: TS: src/core/lib/input/, Rust: rust/engine/src/input/

🎧 Immersion Systems

Audio (★★★★★)

Feature Editor (TS) Rust Engine Notes
Spatial 3D sound ✅ 🚧 Howler.js in TS, skeleton in Rust
Mixer buses (SFX, voice, music) ✅ 🚧 Volume control in TS
Occlusion & reverb zones 🚧 ❌ Basic TS support
Audio playback API ✅ 🚧 Full TS API, basic Rust

Status: 🚧 PARTIAL - TS complete with Howler.js, Rust needs implementation

Particles (★★★★☆)

Feature Editor (TS) Rust Engine Notes
Emitters (burst, continuous, area) ❌ ❌ CRITICAL GAP
Billboard & mesh particles ❌ ❌ CRITICAL GAP
Curves & lifetime params ❌ ❌ CRITICAL GAP

Status: ❌ NOT IMPLEMENTED - Critical missing feature for VFX

Decals (★★★☆☆)

Feature Editor (TS) Rust Engine Notes
Projected quads ❌ ❌ Not implemented
Deferred blending ❌ ❌ Not implemented
Depth bias handling ❌ ❌ Not implemented

Status: ❌ NOT IMPLEMENTED

🧩 Tools & Workflow

Asset Pipeline (★★★★★)

Feature Editor (TS) Rust Engine Notes
FBX/GLTF importer ✅ ✅ Full format support
Automatic re-import 🚧 ❌ TS hot reload
Texture compression pipeline 🚧 ❌ Basic support
Model optimization ✅ ❌ 60-80% file size reduction (TS only)
glTF-Transform pipeline ✅ ❌ prune, dedup, weld, quantize
LOD variant generation ✅ ❌ 3 quality tiers auto-generated

Status: 🚧 PARTIAL - Advanced TS pipeline, basic Rust loading Files: TS: scripts/optimize-models.js, Rust: rust/engine/crates/model_loader/

Prefabs / Blueprints (★★★★★)

Feature Editor (TS) Rust Engine Notes
Nested prefabs ✅ ✅ Full TS hierarchy, complete Rust API
Runtime instantiation ✅ ✅ prefab.instantiate() Lua API working ✅
Parameter overrides ✅ ✅ Position override during instantiation ✅
Instance tracking ✅ ✅ prefab.getInstances(), isInstance() ✅
Hot reload ✅ 🚧 TS complete, Rust partial

Status: ✅ EXCELLENT - Complete runtime prefab API with Lua scripting support Files: TS: src/core/prefabs/, Rust: rust/engine/crates/scripting/src/apis/prefab_api.rs

Scripting System (★★★★★)

Status: ✅ EXCELLENT - TS complete (14 APIs), Rust has 24/25 APIs

TypeScript APIs (14 Complete):

  1. ✅ Entity API, 2. ✅ Transform API, 3. ✅ Three.js API, 4. ✅ Math API, 5. ✅ Input API, 6. ✅ Time API, 7. ✅ Console API, 8. ✅ Event API, 9. ✅ Audio API, 10. ✅ Timer API, 11. ✅ Query API, 12. ✅ Prefab API, 13. ✅ GameObject API, 14. ✅ Entities API

Rust APIs (24/25 Complete): 1-9: Input, Timer, Entity, Transform, Math, Time, Console, Event, Audio ✅ 10-14: Query, Prefab, GameObject, Entities, Physics ✅ 15-20: Camera, Material, Light, Mesh, Collision, CharacterController ✅ 21-23: Scene, Save/Load ✅ 24: ❌ UI API (only remaining)

Files: TS: src/core/lib/scripting/apis/, Rust: rust/engine/crates/scripting/src/apis/

Events / Signals (★★★★☆)

Feature Editor (TS) Rust Engine Notes
Broadcast system ✅ 🚧 Pub/sub in TS
Async coroutines/timers ✅ ✅ Frame-budgeted timers
UI and AI triggers ✅ ❌ TS only

Status: 🚧 PARTIAL - TS complete, Rust needs full event system

🧭 Editor & Pipeline

Scene Serialization (★★★★☆)

Feature Editor (TS) Rust Engine Notes
Stable deterministic format (YAML/JSON) ✅ 🚧 TSX scene format in TS
Runtime loading ✅ ✅ Both systems
Incremental saves ✅ ❌ TS autosave
60-80% compression ✅ ❌ Default omission + material dedup

Status: 🚧 PARTIAL - Advanced TS serialization, basic Rust loading

Profiler (★★★★★)

Feature Editor (TS) Rust Engine Notes
CPU/GPU frame breakdown 🚧 🚧 Basic stats display
Marker zones 🚧 ❌ Partial instrumentation
Live graphing 🚧 ❌ Basic display

Status: 🚧 PARTIAL - Basic profiling, needs comprehensive tooling

Build System (★★★★☆)

Feature Editor (TS) Rust Engine Notes
Target presets (PC/Mobile/Web) 🚧 ❌ Vite builds for web
Per-platform configs 🚧 ❌ Basic config
Script compilation + packaging ✅ 🚧 TS complete

Status: 🚧 PARTIAL - Web builds work, needs platform targets

Debug Tools (★★★★☆)

Feature Editor (TS) Rust Engine Notes
Gizmos & debug draw ✅ ✅ Transform gizmos, collider viz
Logging console ✅ 🚧 Structured logging in TS
Runtime variable tweaking ✅ ❌ Inspector in TS
Grid rendering ✅ ✅ Both systems

Status: 🚧 PARTIAL - Good debug viz, needs runtime console

Terrain (★★★☆☆)

Feature Editor (TS) Rust Engine Notes
Heightmap import ❌ ✅ Rust has terrain generation
Splat texture painting ❌ 🚧 Basic material support
LOD chunks ❌ ❌ Not implemented

Status: 🚧 PARTIAL - Basic Rust terrain, no editor tools

📊 Implementation Summary

Feature Completion by Category

Category TS Status Rust Status Overall
Core Scene Architecture ✅ 95% ✅ 95% ✅ Excellent
Rendering Pipeline ✅ 90% 🚧 70% 🚧 Good
Performance Optimization ✅ 85% 🚧 50% ⚠️ Needs Work
Physics & Gameplay ✅ 80% ✅ 85% ✅ Excellent
Scripting & APIs ✅ 90% ✅ 80% ✅ Excellent
Audio & Particles 🚧 60% 🚧 30% ⚠️ Needs Work
Tooling & Pipeline ✅ 85% 🚧 40% 🚧 Fair
Editor Features ✅ 80% 🚧 50% 🚧 Good

🔴 Critical Gaps (Prioritized)

1. ❌ Particle/VFX System (★★★★☆)

Impact: Cannot create visual effects (explosions, fire, smoke, magic) Effort: 2-4 weeks | Dependencies: None

2. 🚧 Custom Shader System (★★★★☆)

Impact: Limited to basic PBR materials, no custom visual effects Effort: 2-3 weeks | Dependencies: Material system Enables: Toon/cel shading, holograms, water, fire effects

3. ✅ Character Controller (★★★★★)

Impact: Production-ready character controller with unified architecture, deferred registration, and script API parity Status: ✅ Near Complete (65%) - TS unified system complete with Phases 1-3 done, Phase 4 partial. Remaining: Inspector UX (Phase 5, ~0.5 day), comprehensive tests (Phase 6, ~0.5 day) Effort: 1 day remaining | Dependencies: None Completed (2025-11-07):

  • ✅ Unified CharacterControllerSystem (deprecated Auto system)
  • ✅ Script API routes through controller (no direct RigidBody manipulation)
  • ✅ Deferred registration with 3-frame retry
  • ✅ Registration race condition & WASM crash fixes
  • ✅ Collision filters & predicates applied
  • ✅ Auto/Manual control modes

4. ❌ Undo/Redo System (★★★★☆)

Impact: Professional editor requires undo/redo for usability Effort: 2-3 weeks | Dependencies: Command pattern architecture

5. ✅ Rust Scripting APIs (★★★★★)

Impact: Complete gameplay functionality in Rust engine Status: ✅ 24/25 complete - Only UI API remaining Effort: 1 week for UI API | Dependencies: None

🎯 Recommended Implementation Order

Phase 1: Visual Impact & Quick Wins (4-6 weeks) 🎨

Goal: Maximum visible progress with immediate user satisfaction

  1. Particle/VFX System (2-4 weeks) - Explosions, fire, smoke - instantly impressive
  2. Complete Character Controller (1-2 weeks) - Upgrade to Rapier KinematicCharacterController for slope/step/snap features (basic collisions already work)
  3. FXAA Anti-Aliasing (1 week) - Smooth jagged edges
  4. Custom Shader System - Basic (2-3 weeks) - Toon shading, holograms, water

Outcome: Users see impressive visual results and can interact with creations

Phase 2: Performance Foundation (1-2 weeks) ⚡

Goal: Ensure smooth performance with all visual features

  1. Material Deduplication (Rust) (3-5 days) - Memory optimization
  2. Mesh Optimization Pipeline (Rust) (1 week) - Port asset optimization
  3. Dynamic Batching Improvements (3-5 days) - Reduce draw calls

Outcome: Smooth 60fps performance even with complex visual scenes Note: LOD and BVH already complete in Rust ✅

Phase 3: Professional Tools (3-4 weeks) 🔧

Goal: Complete professional development experience

  1. Undo/Redo System (2-3 weeks) - Professional editor experience
  2. Complete Rust APIs (1 week) - Finish UI API
  3. Enhanced Entity-Component Access (1-2 weeks) - Better DX

Outcome: Professional-grade tools for efficient development

Phase 4: Advanced Features (6-10 weeks) 🚀

Goal: Multi-platform deployment and advanced capabilities

  1. Skinned Mesh Animation (4-6 weeks) - Character animation
  2. Build System (4-6 weeks) - Multi-platform deployment
  3. Navigation/Pathfinding (4-6 weeks) - AI agent support

📈 Progress Tracking

Overall Completion:

  • ✅ Complete Features: 48% (↑3% with Character Controller progress)
  • 🚧 Partial Features: 32%
  • ❌ Missing Features: 20%

Character Controller Progress: 65% complete (Phases 1-3 done, Phase 4 partial)

Feature Parity (TS vs Rust):

  • ✅ Full Parity: Physics, Scene Graph, Lighting, Materials, Input, BVH, LOD, Raycasting
  • 🚧 Partial Parity: Rendering, Scripting, Audio, Serialization, Character Controller
  • ⚠️ Critical Gaps: Particle System

Scripting API Completion:

  • TypeScript: 58% (14/24 APIs)
  • Rust: 96% (24/25 APIs) - Only UI API remaining

🏆 Strengths & Achievements

✅ Completed Systems

  1. Transform & Scene Graph - Complete hierarchy in both TS and Rust
  2. Physics Integration - Full Rapier3D with complete parity
  3. PBR Materials - Professional material pipeline
  4. Prefab System - Advanced runtime instantiation
  5. TypeScript Scripting - 14 complete APIs
  6. Rust Scripting - 24/25 complete APIs (96%)
  7. Asset Optimization - 60-80% file size reduction
  8. BVH Spatial Acceleration - 10-100x raycasting speedup (TS + Rust)
  9. LOD System - 3 quality tiers (TS + Rust)
  10. Input System - Full parity with action mapping
  11. Character Controller - 65% complete - Unified system with deferred registration, script API parity, auto/manual modes (TS near complete, Rust partial)

🎯 Competitive Advantages

  • Hybrid Architecture: TypeScript editor + Rust engine
  • Advanced Optimization: Best-in-class asset pipeline with massive compression
  • Spatial Acceleration: BVH provides industry-leading raycasting performance
  • Modular Design: Clean separation with workspace crates
  • Hot Reload: Fast iteration with script and asset reloading

Last Updated: 2025-11-07 (Character Controller Gap Closure Phases 1-3 Complete) Engine Version: Vibe Coder 3D (Visual-First Phase) Codebase: /home/joao/projects/vibe-coder-3d

Development Timeline Estimates:

  • Minimum Viable Engine: 16-22 weeks (Phases 1-2)
  • Production Ready: 24-35 weeks (Phases 1-3)
  • Feature Complete: 38-56 weeks (Phases 1-4)

🎮 Getting to a Playable Game (Platformer/Endless Runner)

Goal: Ship a basic functional game in 2-3 weeks

Critical Path (Must Have)

Priority Feature Status Effort Why Critical
P0 Complete Character Controller ✅ Near Done 1 day Core complete (65%), needs Inspector UX + tests (Phases 5-6)
P0 Basic UI/HUD (workaround) 🚧 Partial 2-3 days Score display, game over screen - can use console.log or simple text rendering
P1 Game State Management ✅ Ready Scripts Can be done entirely in Lua scripts using existing APIs
P1 Obstacle/Enemy Spawning ✅ Ready Scripts Use GameObject.createPrimitive() + physics in scripts

What You Already Have ✅

  • ✅ Character Controller - Basic movement + collisions working
  • ✅ Physics System - Full Rapier3D integration
  • ✅ Input System - Complete (WASD, Space, etc.)
  • ✅ Scripting - 24/25 APIs (can do game logic in Lua)
  • ✅ Rendering - PBR materials, lighting, shadows
  • ✅ Scene Management - Load/save scenes, prefabs
  • ✅ Entity System - Create/destroy entities at runtime

Minimal Viable Game Path (2-3 weeks)

Week 1: Core Gameplay

  1. Polish Character Controller (1 day) ✅ Core Complete!
    • ✅ Rapier KinematicCharacterController integrated
    • ✅ Slope limiting, step climbing, ground snapping working
    • ✅ Unified system with script API parity
    • 🚧 Remaining: Inspector UX (optional), comprehensive tests (recommended)
    • Ready to use for gameplay!

Week 2: Game Mechanics (Can do in parallel with Week 1) 2. Basic UI Workaround (2-3 days)

  • Option A: Use console.log for score/debug (quickest)
  • Option B: Simple text rendering overlay (better UX)
  • Option C: Wait for UI API (1 week) - if you want proper UI
  1. Game Logic Scripts (2-3 days)
    • Score tracking (use Save/Load API or global variables)
    • Obstacle spawning (GameObject.createPrimitive)
    • Collision detection (Collision API already exists)
    • Game over logic

Week 3: Polish & Testing 4. Level Design (1-2 days)

  • Create platformer level or endless runner obstacles
  • Test difficulty curve
  1. Polish (2-3 days)
    • Add sound effects (Audio API exists)
    • Tune character controller feel
    • Add simple visual feedback

Platformer-Specific Needs

Feature Status Solution
Jump mechanics ✅ Ready Character controller has jump, can tune in scripts
Platform collision ✅ Ready Physics collisions work
Slope handling ✅ Ready KinematicCharacterController with slopeLimit
Step climbing ✅ Ready Auto-step with configurable stepOffset
Moving platforms ✅ Ready Use kinematic rigid bodies + scripts
Collectibles ✅ Ready Use triggers + Collision API

Endless Runner-Specific Needs

Feature Status Solution
Forward movement ✅ Ready Character controller move()
Obstacle spawning ✅ Ready GameObject.createPrimitive() in scripts
Obstacle removal ✅ Ready GameObject.destroy() when off-screen
Score tracking ✅ Ready Save/Load API or scripts
Speed increase ✅ Ready Script logic
Collision detection ✅ Ready Collision API

Quick Win: Console-Based Game (1 week)

If you want to ship something FAST, you can skip UI API and use:

-- Simple score display via console
function update()
    local score = getScore()
    console.log("Score: " .. score)
end

-- Game over detection
function onCollisionEnter(otherEntityId)
    if otherEntityId == obstacleId then
        console.log("GAME OVER! Final Score: " .. score)
        -- Reset game logic here
    end
end

Recommended Order for First Playable Game

  1. ✅ Character Controller - READY! Core complete (2025-11-07)
  2. Basic UI Workaround (2-3 days) - Use console or simple text
  3. Game Scripts (2-3 days) - Score, obstacles, game over
  4. Level Design (1-2 days) - Build your first level
  5. Polish (2-3 days) - Sound, feel, difficulty

Total: 1-2 weeks to playable game (Character controller no longer blocking! 🎉)

What You DON'T Need (Yet)

  • ❌ Particle/VFX System - Nice to have, not required
  • ❌ Custom Shaders - Basic PBR is fine
  • ❌ Animation System - Static meshes work
  • ❌ Advanced Profiling - Basic stats are enough
  • ❌ Undo/Redo - Not needed for gameplay