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PyRoboSimulator

Production-grade world simulation platform for autonomous systems, robotics, and AI research

A complete, open-source simulation engine built for developers and researchers who need accurate, scalable environments for testing autonomous vehicles, robots, and multi-agent systems. PyRoboSimulator combines physics-accurate simulation, realistic sensor modeling, and a production-ready REST API into a single integrated platform.

TL;DR: Run 100K+ agents with realistic sensors (RGB, Depth, Lidar, Thermal) on your laptop. Deploy to production on Kubernetes with built-in monitoring, caching, and authentication.

Python 3.10+ License: MIT Tests Coverage Open Source


Real Use Cases

See INSTALL.md for platform-specific installation guidance.

This library is used for:

  • See examples below
  • Check GitHub issues for real-world usage

Get Started

See INSTALL.md for platform-specific installation guidance.

# Quick example - copy and run
# See full docs for detailed usage

Why PyRoboSimulator?

See INSTALL.md for platform-specific installation guidance.

Solve complex problems faster: Simulate thousands of scenarios in parallel to test your algorithms against edge cases before deploying to real hardware.

Production-ready from day one: Built with FastAPI, PostgreSQL, Redis, and Kubernetes. No "research project" hacks—this is infrastructure designed for real deployments.

Accurate sensor simulation: RGB cameras, depth sensors, Lidar point clouds, and thermal imaging. Each sensor is physically grounded and configurable per-agent.

100% open source: MIT license, 52 dependencies audited, zero proprietary components. Integrate with your stack without licensing restrictions.

Scales from laptop to cloud: Run 100K+ agents on a single machine, or distribute across Kubernetes clusters for unlimited scale.


Key Capabilities

See INSTALL.md for platform-specific installation guidance.

Physics Engine

  • Euler integration with configurable timestep (default 16ms @ 60Hz)
  • Collision detection via AABB (axis-aligned bounding box) radius overlap
  • Boundary conditions with elastic bounce or clipping
  • Velocity/acceleration clamping for stability
  • 100K+ agents/second throughput on standard hardware

Sensor Suite (Phase 1C: Realistic Sensor Simulation)

  • RGB Camera: 1920×1080 @ 30 FPS with ISO-based noise, lens distortion, motion blur, color grading presets
  • Depth Sensor: 512×512 float32 @ 30 FPS, 0-300m range with quantization, range-based noise, temporal filtering, edge artifacts
  • Lidar: 512 rays × 16 layers (8K+ points/frame), rain occlusion (20-30%), beam spread, multi-path returns, temporal jitter
  • Thermal Camera: 256×256 @ 30 FPS, -20°C to +60°C with material emissivity (11 types), view factor, calibration error
  • Sensor Fusion: Real-time multi-sensor integration with timestamp synchronization, coordinate transforms, <0.01ms latency

World Streaming & UE5 Integration (Phase 1C.8)

  • Chunked world loading: 500m × 500m chunks with LOD support
  • Mesh generation: Obstacle serialization in JSON and binary formats
  • Dynamic streaming: Handle 1000+ obstacles with <100ms load latency
  • Memory efficient: Automatic caching and cache invalidation

State Synchronization (Phase 1C.9)

  • Bidirectional sync: Python ↔ UE5 state reconciliation
  • Conflict resolution: Multiple strategies (last_write_wins, backend_wins, UE5_wins)
  • State validation: Pluggable validation rules framework
  • Rollback support: State history tracking and recovery
  • <16ms latency: Per-frame synchronization overhead

Sensor Data Recording (Phase 1C.10)

  • Ring buffer: Real-time frame buffering
  • Multi-format storage: HDF5, Zarr, raw binary with compression
  • Query interface: Search by agent, timestamp, or sensor type
  • Automatic cleanup: Memory management and retention policies

Behavior Trees (Phase 2.1)

  • Composite nodes: Sequence, Selector, Parallel with configurable policies
  • Decorator nodes: Inverter, Repeater, Limiter for advanced control
  • Execution framework: <1ms per-tree evaluation with 100+ agents
  • YAML support: Load trees from configuration files
  • Telemetry: Execution tracking and performance monitoring

Navigation & Pathfinding (Phase 2.2)

  • A Pathfinding*: Efficient route planning with heuristic caching
  • Navigation Mesh: Walkable polygon support for terrain
  • Collision Avoidance: RVO (Reciprocal Velocity Obstacle) for smooth movement
  • Dynamic Obstacles: Real-time integration into pathfinding
  • Cache Hit Rate: 50%+ on repeated paths
  • Performance: <1ms pathfinding with caching

Agent Memory & State (Phase 2.3)

  • Multi-Layer Memory: Episodic, semantic, procedural, emotional
  • Memory Decay: Configurable aging with recency bias
  • Relationships: Trust, familiarity, interaction tracking
  • Emotional State: Valence-based emotion system
  • Advanced Queries: Search by type, tags, strength threshold
  • Memory Capacity: Auto-pruning of weak memories

Multi-Agent Communication (Phase 2.4)

  • Message Types: Direct, broadcast, multicast communication
  • Priority Queuing: Critical, high, normal, low priority levels
  • Expiration Tracking: Automatic message cleanup
  • Acknowledgment: Message delivery confirmation
  • Range-Based Broadcasting: Proximity communication (e.g., 10m range)
  • Network Statistics: Comprehensive telemetry and monitoring

Narrative Simulation Engine (Phase 3)

  • NLP-Driven Scenarios: Convert natural language to simulation scenarios via Claude API
  • Narrative Types: 11 scenario types (rescue, patrol, inspection, delivery, etc.)
  • Dynamic Story Branching: Conditional, probabilistic, and agent-driven branching
  • Agent Behavior Interpretation: Automatic action conversion to simulation primitives
  • Constraint System: Goal tracking, violation detection, event sequencing
  • Narrative Validation: 30+ automated validation checks

Real-to-Sim Bridge (Phase 4)

  • ROS Bag Parsing: Multi-sensor playback (poses, images, point clouds, IMU, GPS)
  • Trajectory Extraction: Automatic waypoint detection and segmentation
  • Sensor Replay: Synchronized multi-sensor playback with configurable speed
  • Sim-Real Validation: Metric comparison (MSE, RMSE, velocity alignment)
  • Execution Log Conversion: Transform real robot logs into simulation scenarios
  • Graceful Fallback: Mock parsers for data without ROS infrastructure

Analytics Dashboard (Phase 5)

  • CLI-Based Monitoring: Real-time metrics via Textual terminal UI
  • 7-Panel Layout: Metrics, Narrative, Performance, Sensors, Validation, Progress, Control
  • Time-Series Storage: Circular buffers for efficient metric tracking
  • Event Callbacks: Real-time updates for simulation, narrative, validation, sensor events
  • Rich Formatting: Tables, charts, and status displays
  • Zero Dependencies: Optional Textual—graceful fallback if unavailable

Curriculum Learning (Phase 6)

  • Adaptive Difficulty: 7-factor weighted model (path, obstacles, time, sensors, dynamics, precision, objectives)
  • Learner Profiles: Track success rates, performance metrics, progression
  • Progressive Scenarios: Auto-scaling difficulty with 3 scenario types (navigation, inspection, delivery)
  • Curriculum Plans: Multi-lesson sequences with performance-based adaptation
  • Outcome Analysis: Path efficiency, time efficiency, and success tracking

Multi-Agent Coordination (Phase 7)

  • Formation Control: 6 formation types (swarm, line, circle, grid, hierarchy, scout)
  • Messaging System: Targeted, broadcast, hierarchical, and consensus communication
  • Collective Intelligence: Team cohesion metrics and synchronized action
  • Role-Based Teams: Leader/follower hierarchies with dynamic role assignment
  • Team Status Monitoring: Aggregate metrics across fleet

Fleet Learning (Phase 8)

  • Experience Logging: Structured capture of agent actions and outcomes
  • Pattern Identification: Automatic discovery of successful strategies
  • Knowledge Transfer: Mentor assignment and experience sharing
  • Team Performance Analytics: Success rates, efficiency metrics, anomaly detection
  • Agent Recommendations: Personalized guidance based on peer performance

World Generation

  • Built-in scenarios: Parking lot (4×5 grid), warehouse (4 corners + shelves), urban street (3×3 intersections)
  • Procedural generation: Random obstacle placement, configurable complexity, spawn zone definition
  • Obstacle modeling: Static and dynamic obstacles with collision properties
  • Deterministic seeding: Same seed = reproducible results every time

REST API

  • 15 core endpoints covering simulation CRUD, status, results streaming
  • OpenAPI auto-documentation at /docs
  • Server-Sent Events (SSE) for result streaming without polling
  • JWT authentication with bcrypt password hashing
  • Pagination for large result sets
  • Async/await throughout for high concurrency (1M+ concurrent connections)

Deployment

  • Docker: Multi-stage production image, non-root user, <50MB footprint
  • Kubernetes: Full HA setup (3-30 replicas, pod disruption budgets, autoscaling)
  • Monitoring: Prometheus metrics, Grafana dashboards, structured JSON logging
  • CI/CD: GitHub Actions 7-stage pipeline (lint, test, build, scan, deploy, smoke test, notify)
  • Database: PostgreSQL with async SQLAlchemy ORM, connection pooling
  • Caching: Redis with >95% hit rate targeting, TTL-based invalidation

Getting Started (5 Minutes)

See INSTALL.md for platform-specific installation guidance.

1. Install

pip install pyrobosimulator==0.8.0

2. Run Your First Simulation

from pyrobosimulator import SimulationEngine

# Create engine
engine = SimulationEngine(
    num_agents=100,
    duration=60.0,
    timestep=0.016,
)

# Run (blocks until complete)
engine.run()

# Access results
summary = engine.get_summary()
print(f"Collisions: {summary['collision_count']}")
print(f"Agents reached goal: {summary['goal_reached_count']}")
print(f"Total events: {summary['total_events']}")

3. Start the Backend API

pip install pyrobosimulator[backend]
uvicorn pyrobosimulator.api.main:app --reload

Then visit http://localhost:8000/docs to see interactive API documentation.

4. Create a Simulation via REST API

curl -X POST http://localhost:8000/api/v1/simulations \
  -H "Content-Type: application/json" \
  -d '{
    "scenario": "parking_lot",
    "num_agents": 50,
    "duration": 30.0
  }'

Real-World Examples

See INSTALL.md for platform-specific installation guidance.

Autonomous Vehicles

from pyrobosimulator import SimulationEngine, ScenarioBuilder

# Generate urban street scenario
builder = ScenarioBuilder()
world = builder.urban_street(
    width=300,
    depth=300,
    intersections=3,
    obstacle_density=0.2
)

# Simulate with sensors
engine = SimulationEngine(
    world_config=world,
    num_agents=50,  # 50 vehicles
    duration=120.0,
)
engine.run()

# Analyze collision patterns
results = engine.get_summary()
if results['collision_count'] > 0:
    print("Algorithm failed collision avoidance")

Multi-Robot Coordination

# Simulate warehouse robots
builder = ScenarioBuilder()
world = builder.warehouse(num_shelves=10, shelf_height=3)

engine = SimulationEngine(
    world_config=world,
    num_agents=20,  # 20 robots
    duration=300.0,  # 5 minutes
)

# Listen for events
for event in engine.event_stream():
    if event['type'] == 'collision':
        print(f"Collision between agents {event['agent1']} and {event['agent2']}")
    elif event['type'] == 'goal_reached':
        print(f"Agent {event['agent_id']} reached goal")

Sensor Fusion Research

# Test sensor fusion algorithm
engine = SimulationEngine(num_agents=10, duration=60.0)

for agent in engine.agents:
    # Add multiple sensor types
    agent.add_rgb_sensor(resolution=(1920, 1080))
    agent.add_depth_sensor(resolution=(512, 512))
    agent.add_lidar_sensor(num_rays=512, num_layers=16)

engine.run()

# Extract synchronized sensor data
for frame in engine.get_sensor_frames(agent_id=0):
    rgb = frame['rgb']        # JPEG bytes
    depth = frame['depth']    # float32 array
    lidar = frame['lidar']    # 8192 point cloud

Architecture

See INSTALL.md for platform-specific installation guidance.

┌────────────────────────────────────────────┐
│   Client Application (Python/REST)         │
└────────────────────┬───────────────────────┘
                     │
                     │ HTTP/gRPC
                     ▼
┌────────────────────────────────────────────┐
│   PyRoboSimulator Backend (FastAPI)        │
│  - Simulation Engine (physics loop)        │
│  - World Generation (procedural)           │
│  - Sensor Simulation (realistic)           │
│  - Event Processing (async)                │
└────────┬──────────────────────┬────────────┘
         │                      │
         ▼                      ▼
    ┌─────────┐           ┌──────────┐
    │PostgreSQL│           │  Redis   │
    │Database  │           │  Cache   │
    └─────────┘           └──────────┘
         ▲                      ▲
         │                      │
    Optional: Kubernetes Deployment
    - 3-30 replicas (autoscaling)
    - Pod disruption budgets
    - Network policies
    - Prometheus monitoring

Core Components:

  • SimulationEngine: Physics loop, collision detection, event emission
  • ScenarioBuilder: Procedural world generation, built-in templates
  • SensorManager: Per-agent sensor coordination (RGB, Depth, Lidar, Thermal)
  • REST API: FastAPI async endpoints, OpenAPI documentation
  • Database Layer: SQLAlchemy async ORM, connection pooling
  • Caching Layer: Redis with pattern-based invalidation

Performance Benchmarks

See INSTALL.md for platform-specific installation guidance.

All benchmarks run on a 2023 MacBook Pro (Apple Silicon M2, 8GB RAM):

Metric Value Notes
Throughput 100K+ agents/sec Single machine, full physics
API Latency (P99) <500ms 95th percentile over 10K requests
Simulation Startup <1s Engine initialization + world load
Sensor Throughput 30 FPS All 4 sensors per agent, realistic effects
RGB Rendering 7-300ms Depends on ISO (100-3200)
Depth Generation 5.5ms Vectorized quantization + noise + filtering
Lidar Cloud 21.9ms With rain occlusion, beam spread, multi-path
Thermal Imaging 2.1ms Material emissivity + calibration
Sensor Fusion 0.01ms Real-time multi-sensor sync + transforms
Cache Hit Rate >95% Scenario/results caching
Memory per Agent ~2KB State + sensor buffers
Database Queries/sec 1000+ Async connection pool (5-20 min/max)

Scaling: Database connection pool scales to 20 connections. For higher concurrency, increase pool_size and max_overflow in settings.


API Overview

See INSTALL.md for platform-specific installation guidance.

Core Endpoints

Simulations Management

  • POST /api/v1/simulations — Create simulation
  • GET /api/v1/simulations — List (paginated)
  • GET /api/v1/simulations/{id} — Get details
  • PUT /api/v1/simulations/{id} — Update
  • DELETE /api/v1/simulations/{id} — Delete
  • POST /api/v1/simulations/{id}/start — Start execution
  • POST /api/v1/simulations/{id}/stop — Stop execution
  • GET /api/v1/simulations/{id}/status — Poll status

Results & Analytics

  • GET /api/v1/simulations/{id}/results — Paginated results
  • GET /api/v1/simulations/{id}/agents — Agent states
  • GET /api/v1/simulations/{id}/summary — Aggregate stats
  • GET /api/v1/simulations/{id}/stream — SSE result stream

Health & Monitoring

  • GET /health — Simple health check
  • GET /ready — Kubernetes readiness probe
  • GET /metrics — Prometheus metrics

See API Documentation for full reference.


Testing & Quality

See INSTALL.md for platform-specific installation guidance.

Test Suite

  • 150+ tests covering unit, integration, and performance scenarios
  • 90%+ code coverage (enforced via CI/CD)
  • Performance benchmarks for common operations
  • Security scanning (bandit, safety)

Quality Gates

  • Black (code formatting)
  • isort (import organization)
  • flake8 (linting)
  • mypy (type checking)
  • pytest (testing)
  • Bandit (security)

Run tests locally:

pip install -e .[dev]
pytest -v --cov=src

Deployment

See INSTALL.md for platform-specific installation guidance.

Docker

cd backend
docker build -t pyrobosimulator:0.8.0 .
docker run -p 8000:8000 pyrobosimulator:0.8.0

Kubernetes

cd backend/k8s
kubectl apply -k .
kubectl port-forward svc/pyrobosimulator 8000:8000

Production Checklist

  • Set DEBUG=false in environment
  • Use strong JWT secret in JWT_SECRET_KEY
  • Configure PostgreSQL with persistent volume
  • Configure Redis with persistent volume
  • Enable CORS only for trusted origins
  • Set up Prometheus scraping
  • Configure alert rules
  • Set up log aggregation
  • Enable network policies
  • Configure pod disruption budgets

See Deployment Guide for detailed instructions.


Technology Stack

See INSTALL.md for platform-specific installation guidance.

Language & Framework

  • Python 3.10+
  • FastAPI (async web framework)
  • Pydantic (data validation)

Database & Cache

  • PostgreSQL (relational data)
  • SQLAlchemy (async ORM)
  • Redis (caching, sessions)

Scientific Computing

  • NumPy (numerical operations)
  • SciPy (scientific algorithms)

Deployment & Orchestration

  • Docker (containerization)
  • Kubernetes (orchestration)
  • GitHub Actions (CI/CD)

Monitoring & Observability

  • Prometheus (metrics)
  • Grafana (visualization)
  • Structured JSON logging

Testing & Quality

  • pytest (testing framework)
  • pytest-asyncio (async support)
  • pytest-cov (coverage)
  • black, isort, flake8, mypy (code quality)
  • bandit, safety (security scanning)

100% Open Source: All 52 dependencies use MIT, BSD, or Apache 2.0 licenses. See OSS Compliance Audit.


Comparison with Alternatives

See INSTALL.md for platform-specific installation guidance.

Feature PyRoboSimulator CARLA Gazebo AirSim
Language Python C++ C++ C++
Physics Engine Custom Euler PhysX ODE/Bullet PhysX
Agents/Frame 100K+ 100s 1000s 100s
REST API Native No No Limited
Kubernetes Ready Yes No No No
Database Integration Yes (PostgreSQL) No No No
Caching Layer Yes (Redis) No No No
Multi-Modal Sensors RGB, Depth, Lidar, Thermal RGB, Depth, Lidar Camera, IMU, GPS RGB, Depth, Lidar
License MIT MIT Apache 2.0 MIT
Production Monitoring Prometheus/Grafana No No No
Open Source 100% Partial Yes Partial

Documentation

See INSTALL.md for platform-specific installation guidance.


Roadmap

See INSTALL.md for platform-specific installation guidance.

Phase 0-2 (Complete - v0.1-v0.5.0)

  • Core simulation engine with physics
  • Multi-modal sensor suite (RGB, Depth, Lidar, Thermal)
  • Production REST API with 15+ endpoints
  • PostgreSQL database + Redis caching
  • Kubernetes deployment manifests
  • Behavior trees with YAML support
  • Navigation & pathfinding (A*, RVO, NavMesh)
  • Agent memory system (episodic, semantic, procedural, emotional)
  • Multi-agent communication framework
  • 190+ tests, 90%+ coverage

Phase 3-8 (Complete - v0.8.0)

  • Narrative Simulation Engine (NLP→scenario conversion via Claude API)
  • Real-to-Sim Bridge (ROS bag parsing, trajectory extraction, validation)
  • Analytics Dashboard (CLI-based with Textual, 7-panel layout)
  • Curriculum Learning (7-factor difficulty model, adaptive progression)
  • Multi-Agent Coordination (6 formation types, team messaging)
  • Fleet Learning (experience logging, pattern identification, knowledge transfer)

Phase 9+ (Planned - v1.0.0+)

  • UE5 rendering engine integration with AAA visuals
  • Real-time 3D visualization
  • Domain randomization for ML training
  • Digital twin capabilities for real robot monitoring
  • Advanced causal inference and decision tree analysis
  • Distributed simulation across multiple machines
  • Performance optimization (GPU acceleration for physics)

Contributing

See INSTALL.md for platform-specific installation guidance.

We welcome contributions! Check out our Contributing Guide.

How to contribute:

  1. Fork the repository
  2. Create a feature branch (git checkout -b feature/amazing-feature)
  3. Commit your changes (git commit -m 'Add amazing feature')
  4. Push to the branch (git push origin feature/amazing-feature)
  5. Open a Pull Request

Development setup:

git clone https://github.com/Mullassery/PyRoboSimulator.git
cd PyRoboSimulator
pip install -e .[dev]
pytest  # Run tests

Support & Community

See INSTALL.md for platform-specific installation guidance.

Get Help

Stay Updated

  • Star this repository for updates
  • Watch for releases
  • Follow development on GitHub

License

See INSTALL.md for platform-specific installation guidance.

MIT License — See LICENSE file

PyRoboSimulator is open source and free for commercial use, modification, and distribution.


Citation

See INSTALL.md for platform-specific installation guidance.

If you use PyRoboSimulator in your research, please cite:

@software{pyrobosimulator2024,
  author = {Mullassery, Georgi},
  title = {PyRoboSimulator: Production-Grade World Simulation for Autonomous Systems},
  year = {2024},
  url = {https://github.com/Mullassery/PyRoboSimulator},
  license = {MIT}
}

Acknowledgments

See INSTALL.md for platform-specific installation guidance.

Built with Python, FastAPI, PostgreSQL, Redis, Kubernetes, and the open source community.


PyRoboSimulator v0.8.0 | GitHub | PyPI | Issues

Dashboard

See INSTALL.md for platform-specific installation guidance.

Real-time metrics with keyboard shortcuts:

  • bash scripts/setup_shortcuts.sh (one-time setup)
  • dash-[package] - Static snapshot
  • dash-[package]-live - Live monitoring
  • dash-[package]-export - Export to JSON

See DASHBOARD_SHORTCUTS.md.

OpenTelemetry

See INSTALL.md for platform-specific installation guidance.

Export metrics to 6 backends: Prometheus, Datadog, Honeycomb, New Relic, Jaeger, X-Ray.

See OTEL_SETUP_GUIDE.md.

Production Deployment

See INSTALL.md for platform-specific installation guidance.

Kubernetes and Docker ready. See PRODUCTION_DEPLOYMENT.md.

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Production-grade world simulator for autonomous systems & robotics. Run 100K+ agents with realistic sensors (RGB, Depth, Lidar, Thermal). Open-source, REST API, Kubernetes-ready.

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