External Libraries in FTC

intermediate25 min

Understanding External Libraries in FTC

FTC teams often use external libraries to simplify complex programming tasks and improve code organization. These libraries provide pre-built solutions for common robotics problems, allowing teams to focus on strategy and robot-specific logic rather than reinventing basic functionality.

Why Use External Libraries?

External libraries offer several advantages for FTC teams:Time Savings: Pre-built solutions reduce development timeReliability: Well-tested code with fewer bugsAdvanced Features: Access to sophisticated algorithms and techniquesCommunity Support: Active communities provide help and updatesLearning Opportunities: Study well-written code to improve programming skills

Library Integration Considerations

Before choosing a library, consider these factors:Learning Curve: How much time will it take to learn the library?Documentation Quality: Is the library well-documented with examples?Community Size: Larger communities provide better supportUpdate Frequency: Regular updates indicate active maintenanceCompatibility: Does it work with your current FTC SDK version?Performance: Does it meet your robot’s performance requirements?

FTC Library Comparison

TRCLib Deep Dive

TRCLib is one of the most popular command-based programming frameworks for FTC. It provides a structured approach to robot programming that mirrors professional robotics development practices.Key Features:Command-Based Programming: Organizes code into commands and subsystemsState Management: Built-in state machine capabilitiesTelemetry Integration: Easy integration with FTC telemetryExtensive Documentation: Comprehensive guides and examplesActive Community: Large user base with good supportWhen to Use TRCLib:Building complex robots with multiple subsystemsWanting to learn professional robotics programming practicesNeed for advanced state management and command sequencingPlanning to scale to more complex robot designs

NextFTC Deep Dive

NextFTC is a modern framework designed to simplify FTC development while maintaining good programming practices. It provides a clean API that’s easier to learn than some alternatives.Key Features:Modern API Design: Clean, intuitive interfaceBuilt-in Utilities: Common functions pre-implementedGood Documentation: Clear guides and examplesActive Development: Regular updates and improvementsBeginner Friendly: Easier learning curve than some alternativesWhen to Use NextFTC:Wanting modern development practices without overwhelming complexityTeams with intermediate programming experienceNeed for good documentation and examplesPrefer cleaner, more intuitive APIs

Dairy Deep Dive

Dairy is a lightweight utility library focused on common FTC programming tasks. It’s designed to be simple and focused rather than providing a complete framework.Key Features:Lightweight: Small library size, minimal overheadFocused Scope: Specific utilities for common tasksEasy Integration: Simple to add to existing projectsBeginner Friendly: Simple API, easy to understandModular: Use only what you needWhen to Use Dairy:Need specific utilities without full framework overheadSimple robot designs that don’t require complex frameworksWant to learn from focused, well-written utility codePrefer to build custom solutions with helper utilities

SolversLib Deep Dive

SolversLib is a specialized library focused on advanced path planning and motion control. It provides sophisticated algorithms for autonomous movement and trajectory following.Key Features:Advanced Path Planning: Sophisticated trajectory generationMotion Control: Precise movement control algorithmsMathematical Rigor: Based on solid control theoryPerformance Optimized: Efficient algorithms for real-time controlGood Documentation: Clear explanations of algorithmsWhen to Use SolversLib:Focus on advanced autonomous movementNeed precise trajectory followingHave understanding of control theoryWant to implement sophisticated motion control

FTCLib Deep Dive

FTCLib is a comprehensive development framework that provides a complete solution for FTC programming. It includes everything from basic utilities to advanced features.Key Features:Complete Framework: Comprehensive solution for all aspectsExtensive Features: Wide range of capabilitiesActive Community: Large user base and good supportGood Documentation: Comprehensive guides and examplesRegular Updates: Active maintenance and improvementsWhen to Use FTCLib:Want a complete solution for all programming needsBuilding complex robots with many featuresPrefer comprehensive frameworks over multiple smaller librariesNeed extensive features and capabilities

Making the Right Choice

Choosing the right library depends on your team’s specific needs and experience level:For Beginners:Start with Dairy for simple utilitiesConsider NextFTC for a gentle introduction to frameworksFocus on learning the basics before diving into complex frameworksFor Intermediate Teams:NextFTC provides a good balance of features and simplicityTRCLib if you want to learn professional practicesConsider SolversLib if focusing on advanced movementFor Advanced Teams:TRCLib for professional-grade code structureFTCLib for comprehensive feature setSolversLib for advanced motion controlConsider combining multiple libraries for specific needs

Integration Best Practices

When integrating external libraries into your FTC project:Setup and Configuration:Follow the library’s official setup instructionsEnsure compatibility with your FTC SDK versionTest the library with a simple example before full integrationKeep backups of your original codeDevelopment Workflow:Start with the library’s examples and tutorialsIncrementally integrate features rather than rewriting everything at onceUse version control to track changes and enable rollbacksDocument your customizations and modificationsTesting and Validation:Test library features thoroughly before competitionHave fallback plans if library features don’t work as expectedMonitor performance impact on your robotKeep the library updated to the latest stable version

Library Evaluation Exercise

Evaluate which library would be best for your team's current robot design and programming experience level.

List your robot’s main subsystems and features
Assess your team’s programming experience level
Identify your primary development goals (learning, competition performance, etc.)
Research the libraries that match your needs
Create a simple test project with your chosen library
Document your findings and decision process