3D Building Mechanics

Quick Start

import { SpatialHashGrid } from './scripts/spatial-hash-grid.js';
import { HeuristicValidator } from './scripts/heuristic-validator.js';

// Spatial indexing for fast queries
const spatialIndex = new SpatialHashGrid(10);
spatialIndex.insert(piece, piece.position);
const nearby = spatialIndex.queryRadius(position, 15);

// Structural validation (Rust/Valheim style)
const validator = new HeuristicValidator({ mode: 'heuristic' });
validator.addPiece(piece);
const canPlace = validator.validatePlacement(newPiece);

Reference Files

• references/performance-at-scale.md

  - Spatial partitioning, chunk loading, instancing, LOD

• references/structural-physics-advanced.md

  - Arcade vs heuristic vs realistic physics

• references/multiplayer-networking.md

  - Authority models, delta sync, conflict resolution

Scripts

Performance (references/performance-at-scale.md)

• scripts/spatial-hash-grid.js

  - O(1) queries for uniform distribution

• scripts/octree.js

  - Adaptive queries for clustered bases

• scripts/chunk-manager.js

  - World streaming for large maps

• scripts/performance-profiler.js

  - Benchmarking utilities

Structural Physics (references/structural-physics-advanced.md)

• scripts/heuristic-validator.js

  - Fast validation (Fortnite/Rust/Valheim modes)

• scripts/stability-optimizer.js

  - Caching and batch updates

• scripts/damage-propagation.js

  - Damage states, cascading collapse

• scripts/physics-engine-lite.js

  - Optional realistic physics

Multiplayer (references/multiplayer-networking.md)

• scripts/delta-compression.js

  - Only send changed state

• scripts/client-prediction.js

  - Optimistic placement with rollback

• scripts/conflict-resolver.js

  - Handle simultaneous builds

• scripts/building-network-manager.js

  - Complete server/client system

Key Patterns

Spatial Indexing Selection

Physics Mode Selection

• Arcade (Fortnite): Connectivity only, instant collapse, best for combat
• Heuristic (Rust/Valheim): Stability %, predictable, best for survival
• Realistic: Full stress/strain, expensive, best for engineering sims

Multiplayer Pattern