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Building Mechanics

skill-bbeierle12-skill-mcp-claude-3d-building-advanced · by Bbeierle12

Three.js 3D building system with spatial indexing, structural physics, and multiplayer networking. Use when creating survival games, sandbox builders, or any game with player-constructed structures. Covers performance optimization (spatial hash grids, octrees, chunk loading), structural validation (arcade/heuristic/realistic physics modes), and multiplayer sync (delta compression, client predicti…

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Install

$ agentstack add skill-bbeierle12-skill-mcp-claude-3d-building-advanced

✓ scanned · ✓ verified — works with Claude Code, Cursor, and more.

Security review

✓ Passed

No issues found. Passed automated security review. · v0.1.0 How review works →

  • ✓ Prompt-injection patterns
  • ✓ Secret / credential exfiltration
  • ✓ Dangerous shell & filesystem operations
  • ✓ Untrusted network calls
  • ✓ Known-malicious package signatures

What it can access

  • ✓ Network access No
  • ✓ Filesystem access No
  • ✓ Shell / process execution No
  • ✓ Environment & secrets No
  • ✓ Dynamic code execution No

From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.

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About

3D Building Mechanics

Complete building system for Three.js games with performance optimization, structural physics, and multiplayer networking.

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

Read these for detailed implementation guidance:

  • 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

| Pieces | Distribution | Use | |--------|-------------|-----| | <1,000 | Any | Array | | 1-5k | Uniform | SpatialHashGrid | | 1-5k | Clustered | Octree | | 5k+ | Any | ChunkManager + Octree |

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

Server-authoritative with client prediction. Use delta compression for sync.

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

Install and usage instructions live in the source repository linked above.

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Versions

  • v0.1.0 Imported from the upstream source.

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