tier4/scenario_simulator_v2
Dec 2024 – Aug 2025
7 Months active
Languages Used
C++Python
Technical Skills
3D Environment3D GeometryAutonomous DrivingBehavior TreesC++C++ Development
SzymonParapura
PROFILE
Szymonparapura
Szymon Parapura contributed to the tier4/scenario_simulator_v2 repository, focusing on enhancing 3D environment realism, simulation stability, and code maintainability for autonomous driving scenarios. He implemented features such as 3D lanelet support, altitude-aware collision detection, and IMU sensor simulation, using C++ and Python within ROS2 frameworks. His work addressed thread safety in subscription handling, improved entity positioning accuracy, and introduced configurable launch systems for flexible scenario setup. Through targeted code refactoring, documentation, and bug fixes, Szymon improved test reliability and reduced maintenance overhead, demonstrating a strong grasp of simulation, concurrency, and software engineering best practices in robotics development.
Overall Statistics
Feature vs Bugs
71%Features
Repository Contributions
43Total
Bugs
4
Commits
43
Features
10
Lines of code
2,172
Activity Months7
Your Network
56 people
Work History
August 2025
1 Commits
Aug 1, 2025August 2025 monthly summary for tier4/scenario_simulator_v2: Stabilized Cpp Mock Scenarios by ensuring proper localization initialization parameter propagation, enabling consistent scenario execution and reducing test flakiness. The change fixes a missing initialize_localization parameter in the cpp_mock_scenarios launch file and node declarations, enabling correct localization initialization across runs.
1 Commits
Aug 1, 2025August 2025 monthly summary for tier4/scenario_simulator_v2: Stabilized Cpp Mock Scenarios by ensuring proper localization initialization parameter propagation, enabling consistent scenario execution and reducing test flakiness. The change fixes a missing initialize_localization parameter in the cpp_mock_scenarios launch file and node declarations, enabling correct localization initialization across runs.
August 2025
June 2025
10 Commits • 3 Features
Jun 1, 2025June 2025 monthly summary for tier4/scenario_simulator_v2. The work focused on increasing realism, configurability, and stability of the mock simulation environment to accelerate validation of autonomous systems. Key outcomes include AWSIM ego model integration with an optional delayed scenario start to better synchronize with AWSIM and Autoware; map_path configuration with a launch argument and runtime ROS2 parameter override for robust, flexible path loading; a direct ego entity spawner with a comprehensive sensor stack to streamline test setup without path generation; and targeted fixes to restore CI stability (reverting unstable mock_test.launch.py changes) along with a minor code quality improvement. These changes collectively improve test fidelity, reduce setup time, and demonstrate strong ROS2/C++ engineering practices.
June 2025
10 Commits • 3 Features
Jun 1, 2025June 2025 monthly summary for tier4/scenario_simulator_v2. The work focused on increasing realism, configurability, and stability of the mock simulation environment to accelerate validation of autonomous systems. Key outcomes include AWSIM ego model integration with an optional delayed scenario start to better synchronize with AWSIM and Autoware; map_path configuration with a launch argument and runtime ROS2 parameter override for robust, flexible path loading; a direct ego entity spawner with a comprehensive sensor stack to streamline test setup without path generation; and targeted fixes to restore CI stability (reverting unstable mock_test.launch.py changes) along with a minor code quality improvement. These changes collectively improve test fidelity, reduce setup time, and demonstrate strong ROS2/C++ engineering practices.
May 2025
1 Commits • 1 Features
May 1, 2025May 2025 monthly summary for tier4/scenario_simulator_v2 focusing on sensor simulation enhancement and environment stabilization to improve realism and test reliability in the autonomous scenario simulator.
1 Commits • 1 Features
May 1, 2025May 2025 monthly summary for tier4/scenario_simulator_v2 focusing on sensor simulation enhancement and environment stabilization to improve realism and test reliability in the autonomous scenario simulator.
May 2025
April 2025
3 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary: Implemented thread-safety enhancements for the OpenSCENARIO interpreter's subscription messaging in tier4/scenario_simulator_v2, addressing a data race in MagicSubscription, clarifying mutex usage, and improving readability in the subscription callback area. This work involved three commits focused on correctness, documentation, and formatting, and lays a stronger foundation for safe, concurrent event handling in scenarios.
April 2025
3 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary: Implemented thread-safety enhancements for the OpenSCENARIO interpreter's subscription messaging in tier4/scenario_simulator_v2, addressing a data race in MagicSubscription, clarifying mutex usage, and improving readability in the subscription callback area. This work involved three commits focused on correctness, documentation, and formatting, and lays a stronger foundation for safe, concurrent event handling in scenarios.
February 2025
1 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary focusing on code quality improvements in tier4/scenario_simulator_v2. Delivered a readability-focused refactor within the Behavior Tree Plugin to enhance maintainability without changing behavior. Project maintains feature parity and reduces future maintenance cost.
1 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary focusing on code quality improvements in tier4/scenario_simulator_v2. Delivered a readability-focused refactor within the Behavior Tree Plugin to enhance maintainability without changing behavior. Project maintains feature parity and reduces future maintenance cost.
February 2025
January 2025
10 Commits • 2 Features
Jan 1, 2025January 2025 (2025-01) focused on stabilizing lanelet transitions and improving entity positioning accuracy in the tier4/scenario_simulator_v2 repository, while also delivering essential code quality and documentation cleanups. The work enhances realism and reliability of traffic scenarios, reduces drift during lane changes, and improves long-term maintainability through consistent coding standards.
January 2025
10 Commits • 2 Features
Jan 1, 2025January 2025 (2025-01) focused on stabilizing lanelet transitions and improving entity positioning accuracy in the tier4/scenario_simulator_v2 repository, while also delivering essential code quality and documentation cleanups. The work enhances realism and reliability of traffic scenarios, reduces drift during lane changes, and improves long-term maintainability through consistent coding standards.
December 2024
17 Commits • 2 Features
Dec 1, 2024December 2024 monthly performance summary for tier4/scenario_simulator_v2. Focused on enabling robust 3D lanelet support, height-aware safety mechanics, and ongoing code quality improvements to boost realism, reliability, and maintainability of the scenario simulator. Delivered features that improve 3D pose estimation and multi-level collision handling, and implemented maintainability work that reduces future integration risk and accelerates roadmap delivery.
17 Commits • 2 Features
Dec 1, 2024December 2024 monthly performance summary for tier4/scenario_simulator_v2. Focused on enabling robust 3D lanelet support, height-aware safety mechanics, and ongoing code quality improvements to boost realism, reliability, and maintainability of the scenario simulator. Delivered features that improve 3D pose estimation and multi-level collision handling, and implemented maintainability work that reduces future integration risk and accelerates roadmap delivery.
December 2024
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Quality Metrics
Correctness91.2%
Maintainability89.8%
Architecture86.6%
Performance81.6%
AI Usage20.4%
Skills & Technologies
Programming Languages
C++Python
Technical Skills
3D Environment3D GeometryAPI DevelopmentAPI IntegrationAutonomous DrivingBehavior TreesC++C++ DevelopmentCode CleanupCode CommentingCode CorrectionCode DocumentationCode FormattingCode OrganizationCode Quality
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