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Duncan Calvert

PROFILE

Duncan Calvert

David Calvert developed advanced robotics software in the ihmc-open-robotics-software repository, focusing on modular behavior tree tooling, real-time perception, and robust operator interfaces. He engineered features such as multi-client CRDT synchronization, VR-integrated teleoperation, and ROS 2-based hardware control, using Java, Kotlin, and C++ to ensure maintainability and performance. His work included refactoring build systems, enhancing visualization pipelines, and integrating AI-driven decision nodes, all while improving data fidelity and system reliability. By streamlining deployment workflows and standardizing interfaces, David enabled safer, faster experimentation and reduced maintenance overhead, demonstrating depth in backend development, UI/UX, and distributed robotics systems engineering.

Overall Statistics

Feature vs Bugs

73%Features

Repository Contributions

118Total
Bugs
20
Commits
118
Features
53
Lines of code
128,614
Activity Months12

Work History

October 2025

10 Commits • 4 Features

Oct 1, 2025

Monthly summary for 2025-10: Delivered substantial modularization and enhancements across ROS 2 integration, startup workflows, OpenPi data exchange, and Behavior Tree tooling. The work focused on business value through easier deployment, safer operation, and faster iteration cycles by consolidating ROS 2 functionality into dedicated components, unifying startup controls, expanding real-time data exchange, and improving developer experience with Behavior Tree UI improvements and packaging. Overall, these changes reduce integration risk, shorten onboarding for operators, and enable more robust experimentation with OpenPi and VLA setups.

September 2025

15 Commits • 10 Features

Sep 1, 2025

September 2025 monthly summary for ihmc-open-robotics-software: Key architecture improvements, feature deliveries, and codebase cleanup that reduce maintenance burden, improve data fidelity, and accelerate experimentation. Highlights include migration to Kotlin Gradle scripts, VR demo controls, enhanced dataset workflows, and comprehensive dependency cleanups across graphics, ROS, and networking. Notable bug fixes improved robustness of 3D input handling and pause logic.

August 2025

5 Commits • 4 Features

Aug 1, 2025

August 2025 monthly performance summary for ihmc-open-robotics-software focused on enhancing operator control fidelity, perception reliability, and visualization UX. Key work delivered across teleoperation, perception, and visualization received with a strong emphasis on business value and safer robot operation.

July 2025

3 Commits • 3 Features

Jul 1, 2025

July 2025 performance summary focused on delivering automation for artifact publishing, enhancing demonstration data collection through VR controls and Center of Mass (CoM) offset configuration, and improving time synchronization to nanosecond precision across the Open Robotics stack. These efforts improved build reliability, data quality, and system-wide timing accuracy, enabling more robust experiments, cleaner data pipelines, and better reproducibility.

June 2025

12 Commits • 7 Features

Jun 1, 2025

June 2025 monthly summary for ihmc-open-robotics-software: Delivered a set of high-impact features across visualization, perception, data pipelines, and maintenance, with a focus on enabling richer perception debugging, flexible control pipelines, and streamlined asset and sensor integration. Major work spanned visualization enhancements, IK streaming improvements, dataset generation tooling, modern asset support, and migration/standardization to reduce maintenance overhead.

May 2025

3 Commits • 2 Features

May 1, 2025

May 2025: Delivered key UX and robustness improvements for VR IK streaming and log access in ihmc-open-robotics-software. Implemented VR control/visual refinements with new control modes and IK previews, added dynamic teleporter enable/disable in WHOLE_BODY_IK_STREAMING, and introduced clickable log directory navigation for rapid log access. No major bug fixes documented in this period. Overall impact: smoother VR user experience, faster issue triage, and improved operator efficiency. Technologies/skills demonstrated include VR development, IK streaming, UI/UX refinements, cross-repo coordination, and commit-driven development.

April 2025

9 Commits • 5 Features

Apr 1, 2025

April 2025 monthly summary for ihmc-open-robotics-software focusing on reliability, safety, and developer tooling across the main repository. Key efforts centered on hardening footstep planning, enhancing operator interfaces, stabilizing CI/deployment pipelines, and improving code organization to accelerate iteration and reduce operational risk. The work delivered tangible business value by increasing planning robustness in edge cases, enabling safer VR interactions, ensuring consistent simulation and CI behavior, and providing streamlined Docker/NVIDIA deployment workflows.

March 2025

2 Commits • 1 Features

Mar 1, 2025

March 2025 monthly summary for ihmc-open-robotics-software: Focused on visual reliability at startup and enabling AI-driven decision-making in robot behaviors. Delivered a startup font size display fix and introduced an LLM Condition Node Type in the Behavior Tree, with supporting refactors to existing condition logic and groundwork for prompt management, context injection, and model execution.

February 2025

14 Commits • 3 Features

Feb 1, 2025

February 2025 focused on delivering robust behavior tree capabilities, stabilizing core systems, and enabling direct hardware control via ROS 2 integration. The work reduces maintenance burden, accelerates feature delivery, and improves visibility for publication-ready outputs. Key outcomes include feature expansions to Behavior Tree, strategic codebase cleanup, and Nadia ROS 2 messaging/UI enhancements, with notable stability fixes that prevent crashes and synchronization issues.

January 2025

4 Commits • 2 Features

Jan 1, 2025

January 2025 (2025-01) focused on delivering critical features for Behavior Tree tooling, strengthening multi-client collaboration, and improving runtime stability. The work emphasizes business value through improved user experience, reliable synchronization, and robust rendering/debugging capabilities across the ihmc-open-robotics-software stack.

December 2024

24 Commits • 7 Features

Dec 1, 2024

December 2024 monthly summary for ihmc-open-robotics-software (Month: 2024-12). The past month focused on stabilizing core robotics behaviors, improving modularity, and strengthening test coverage across the behavior tree and scene-graph tooling. Delivered multiple refactors to reduce dependency footprint, robust data loading/saving for behavior trees, and targeted performance and reliability improvements that directly enhance operational safety, runtime stability, and developer velocity in perception-integrated workflows.

November 2024

17 Commits • 5 Features

Nov 1, 2024

November 2024 highlights for ihmc-open-robotics-software focused on modernization, reliability, and developer productivity across build systems, visualization, Behavior Tree (BT) tooling, and containerization. The team delivered multiple large-scale refactors and stability fixes that reduce maintenance burden, improve runtime reliability, and accelerate development workflows.

Activity

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Quality Metrics

Correctness89.0%
Maintainability90.2%
Architecture87.8%
Performance80.4%
AI Usage21.2%

Skills & Technologies

Programming Languages

BashBinaryC++DockerfileGDScriptGradleGroovyIDLImGuiJava

Technical Skills

3D Graphics3D Model Integration3D RenderingAI IntegrationAPI DesignAlgorithm ImplementationAsset OptimizationBackend DevelopmentBehavior TreeBehavior Tree DesignBehavior Tree DevelopmentBehavior Tree ImplementationBehavior TreesBug FixBug Fixing

Repositories Contributed To

2 repos

Overview of all repositories you've contributed to across your timeline

ihmcrobotics/ihmc-open-robotics-software

Nov 2024 Oct 2025
12 Months active

Languages Used

BinaryGradleImGuiJavaShellC++DockerfileIDL

Technical Skills

3D GraphicsAPI DesignAsset OptimizationBehavior TreesBuild AutomationBuild System Configuration

ihmcrobotics/ihmc-alexander-sdk

Jul 2025 Jul 2025
1 Month active

Languages Used

Kotlin

Technical Skills

Build Configuration

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