openmobilemaps/maps-core
Oct 2024 – Sep 2025
11 Months active
Languages Used
C++GradleJavaKotlinMarkdownMetalObjective-CSwift
Technical Skills
3D GraphicsAndroid DevelopmentBuild ManagementBuild System ConfigurationC++C++ Development
Stefan Mitterrutzner
PROFILE
Stefan Mitterrutzner
Mitter Rutzner developed core features and enhancements for the openmobilemaps/maps-core repository, focusing on robust map rendering, cross-platform stability, and performance optimization. Over 11 months, Mitter engineered dynamic coordinate systems, flexible vector data workflows, and advanced texture atlas generation using C++ and Metal Shading Language. Their work included shader and animation pipeline improvements, precise line rendering, and per-instance alpha support for text, addressing both iOS and Android requirements. By integrating CI/CD automation, benchmarking, and comprehensive testing, Mitter ensured reliable releases and maintainable code. The technical depth and breadth of these contributions improved visual fidelity, runtime efficiency, and developer productivity.
Overall Statistics
Feature vs Bugs
61%Features
Repository Contributions
137Total
Bugs
25
Commits
137
Features
39
Lines of code
29,871
Activity Months11
Your Network
31 people
Work History
September 2025
5 Commits • 1 Features
Sep 1, 2025September 2025 highlights stability and flexibility improvements in openmobilemaps/maps-core. Delivered iOS rendering stability, decoupled vector source initialization for flexible data workflows, and enhanced visual fidelity for map lines.
5 Commits • 1 Features
Sep 1, 2025September 2025 highlights stability and flexibility improvements in openmobilemaps/maps-core. Delivered iOS rendering stability, decoupled vector source initialization for flexible data workflows, and enhanced visual fidelity for map lines.
September 2025
August 2025
8 Commits • 4 Features
Aug 1, 2025OpenMobileMaps maps-core – August 2025 monthly summary focusing on key accomplishments, major robustness improvements, and value delivered to products and customers.
August 2025
8 Commits • 4 Features
Aug 1, 2025OpenMobileMaps maps-core – August 2025 monthly summary focusing on key accomplishments, major robustness improvements, and value delivered to products and customers.
July 2025
21 Commits • 4 Features
Jul 1, 2025July 2025 was marked by delivering substantial platform enhancements and robust rendering improvements in openmobilemaps/maps-core. Key features include iOS-specific extensions with distanceRange support, bringing iOS parity with the core platform and enabling richer location-based workflows. Mac Catalyst import issues were resolved to improve cross-platform builds and deployment. Core robustness was strengthened with safety checks, pointer validations, correct texture index handling, and proper DataRef construction, reducing crash risk and undefined behavior. Rendering and animation pipelines were stabilized across iOS and Android, including conditional camera animation, iOS invalidate handling, and fixes for endless alpha invalidation and line/ants animations. A timing consistency improvement migrated time measurements from milliseconds to seconds, enabling smoother synchronization across modules. Together, these changes improve reliability, performance stability, and business value by delivering more predictable UI rendering, platform parity, and faster iteration for mobile mapping features.
21 Commits • 4 Features
Jul 1, 2025July 2025 was marked by delivering substantial platform enhancements and robust rendering improvements in openmobilemaps/maps-core. Key features include iOS-specific extensions with distanceRange support, bringing iOS parity with the core platform and enabling richer location-based workflows. Mac Catalyst import issues were resolved to improve cross-platform builds and deployment. Core robustness was strengthened with safety checks, pointer validations, correct texture index handling, and proper DataRef construction, reducing crash risk and undefined behavior. Rendering and animation pipelines were stabilized across iOS and Android, including conditional camera animation, iOS invalidate handling, and fixes for endless alpha invalidation and line/ants animations. A timing consistency improvement migrated time measurements from milliseconds to seconds, enabling smoother synchronization across modules. Together, these changes improve reliability, performance stability, and business value by delivering more predictable UI rendering, platform parity, and faster iteration for mobile mapping features.
July 2025
June 2025
16 Commits • 3 Features
Jun 1, 2025June 2025 focused on delivering high-value map rendering improvements, performance optimizations, and release readiness for openmobilemaps/maps-core. Key features delivered include flexible coordinate systems and symbol layout for vector rendering with improved icon rotation handling and texture atlas spacing, and per-instance alpha support for text on iOS. Shader and rendering refinements further improved 2D rendering and instanced text performance by reducing branches and enabling early exits when alpha is zero. Critical bug fixes addressed global state dependency calculations and maintenance tasks like Git blame ignore list cleanup. Release preparation was completed with a version bump to 3.3.0 and accompanying release notes. Overall, these efforts lowered rendering error, increased visual fidelity, improved runtime performance, and accelerated go-to-market readiness, delivering measurable business value through better map quality, UX polish, and streamlined release processes.
June 2025
16 Commits • 3 Features
Jun 1, 2025June 2025 focused on delivering high-value map rendering improvements, performance optimizations, and release readiness for openmobilemaps/maps-core. Key features delivered include flexible coordinate systems and symbol layout for vector rendering with improved icon rotation handling and texture atlas spacing, and per-instance alpha support for text on iOS. Shader and rendering refinements further improved 2D rendering and instanced text performance by reducing branches and enabling early exits when alpha is zero. Critical bug fixes addressed global state dependency calculations and maintenance tasks like Git blame ignore list cleanup. Release preparation was completed with a version bump to 3.3.0 and accompanying release notes. Overall, these efforts lowered rendering error, increased visual fidelity, improved runtime performance, and accelerated go-to-market readiness, delivering measurable business value through better map quality, UX polish, and streamlined release processes.
May 2025
6 Commits • 2 Features
May 1, 2025May 2025 monthly summary for openmobilemaps/maps-core: Delivered a new MCTextureAtlasProvider enabling efficient texture atlas creation with a rectangle packing algorithm and platform-specific rendering paths for UIKit and AppKit. Implemented a set of stability and rendering fixes for MCMapView, including ensuring drawableSize is set on the main thread, making the commandBuffer completion handler @Sendable to satisfy Swift 6 constraints, correcting UV calculation for pattern textures, and introducing a deallocation-time renderSemaphore workaround to prevent crashes. Updated CI to Xcode 16.3 and tuned benchmark comparison threshold to 0.1 to improve benchmarking reliability and feedback loop. These changes reduce rendering glitches, improve runtime stability, and accelerate CI feedback, delivering stronger visual fidelity and faster iteration.
6 Commits • 2 Features
May 1, 2025May 2025 monthly summary for openmobilemaps/maps-core: Delivered a new MCTextureAtlasProvider enabling efficient texture atlas creation with a rectangle packing algorithm and platform-specific rendering paths for UIKit and AppKit. Implemented a set of stability and rendering fixes for MCMapView, including ensuring drawableSize is set on the main thread, making the commandBuffer completion handler @Sendable to satisfy Swift 6 constraints, correcting UV calculation for pattern textures, and introducing a deallocation-time renderSemaphore workaround to prevent crashes. Updated CI to Xcode 16.3 and tuned benchmark comparison threshold to 0.1 to improve benchmarking reliability and feedback loop. These changes reduce rendering glitches, improve runtime stability, and accelerate CI feedback, delivering stronger visual fidelity and faster iteration.
May 2025
April 2025
2 Commits • 2 Features
Apr 1, 20252025-04 Monthly Summary: Focused on delivering features tied to GeoJSON data and tightening testing coverage to improve reliability for map rendering and data-driven styling. No major bugs fixed this month. The work enhances map fidelity, data-source integration, and test coverage, contributing to lower risk in production deployments and faster iteration cycles.
April 2025
2 Commits • 2 Features
Apr 1, 20252025-04 Monthly Summary: Focused on delivering features tied to GeoJSON data and tightening testing coverage to improve reliability for map rendering and data-driven styling. No major bugs fixed this month. The work enhances map fidelity, data-source integration, and test coverage, contributing to lower risk in production deployments and faster iteration cycles.
March 2025
21 Commits • 6 Features
Mar 1, 2025March 2025 focused on delivering stable, high-value map features, expanding test coverage, and hardening the build/test pipeline. Key features include Vec2D storage in the vector map context, SymbolAnimationCoordinatorMap testing enhancements, and performance improvements by switching to arrays. The team reduced risk with substantial bug fixes that addressed inverted boolean checks, macOS CMake build stability, vec2d test regressions, and guarded access to context.featureStateManager. CI/benchmarking improvements add repeatable validation, faster feedback, and better quality gates. Value tests and code quality improvements further strengthen maintainability. Business impact: more reliable releases, reduced regression risk, faster runtime, and clearer measurement of performance.
21 Commits • 6 Features
Mar 1, 2025March 2025 focused on delivering stable, high-value map features, expanding test coverage, and hardening the build/test pipeline. Key features include Vec2D storage in the vector map context, SymbolAnimationCoordinatorMap testing enhancements, and performance improvements by switching to arrays. The team reduced risk with substantial bug fixes that addressed inverted boolean checks, macOS CMake build stability, vec2d test regressions, and guarded access to context.featureStateManager. CI/benchmarking improvements add repeatable validation, faster feedback, and better quality gates. Value tests and code quality improvements further strengthen maintainability. Business impact: more reliable releases, reduced regression risk, faster runtime, and clearer measurement of performance.
March 2025
February 2025
13 Commits • 2 Features
Feb 1, 2025February 2025 monthly summary focused on stability, rendering accuracy, and maintainability for openmobilemaps/maps-core. Delivered key concurrency and stability improvements in the Map Engine, enhanced rendering correctness with cross-platform shader work, hardened tile data access, and improved diagnostics and thread-safety. The release process was streamlined with a 3.0.1 version bump and comprehensive changelog updates, contributing to reduced crash risk, more predictable gesture behavior, and clearer maintainability signals for future work.
February 2025
13 Commits • 2 Features
Feb 1, 2025February 2025 monthly summary focused on stability, rendering accuracy, and maintainability for openmobilemaps/maps-core. Delivered key concurrency and stability improvements in the Map Engine, enhanced rendering correctness with cross-platform shader work, hardened tile data access, and improved diagnostics and thread-safety. The release process was streamlined with a 3.0.1 version bump and comprehensive changelog updates, contributing to reduced crash risk, more predictable gesture behavior, and clearer maintainability signals for future work.
January 2025
28 Commits • 9 Features
Jan 1, 2025January 2025 performance summary for openmobilemaps/maps-core focused on shader optimization, robust rendering, and release readiness. Delivered iOS shader pipeline improvements and memory-friendly data handling, advanced vector/icon rendering, critical stability fixes, and code quality enhancements that collectively lower GPU memory usage, improve frame stability, and enable faster release cycles.
28 Commits • 9 Features
Jan 1, 2025January 2025 performance summary for openmobilemaps/maps-core focused on shader optimization, robust rendering, and release readiness. Delivered iOS shader pipeline improvements and memory-friendly data handling, advanced vector/icon rendering, critical stability fixes, and code quality enhancements that collectively lower GPU memory usage, improve frame stability, and enable faster release cycles.
January 2025
December 2024
6 Commits • 3 Features
Dec 1, 2024December 2024 focused on delivering core rendering quality and runtime configurability in openmobilemaps/maps-core. Key features were implemented and stabilized to improve user experience and business value: 1) Tiled2D Map Zoom Level Handling with Virtual Zoom: improved tile selection/render as camera moves across zoom levels. 2) Rendering Pipeline Robustness and Transparency Improvements: fixed alpha handling, ensured per-model buffers, and aligned vertex data to prevent cross-model rendering artifacts, including iOS-specific fixes for model matrix buffers and alpha shaders. 3) Dynamic Layer Property Updates via ValueEvaluator API: exposed a ValueEvaluator interface and updateValue mechanism to allow runtime changes to vector layer properties after initialization. These changes collectively enhance visual fidelity, responsiveness of map layers, and configurability for runtime scenarios.
December 2024
6 Commits • 3 Features
Dec 1, 2024December 2024 focused on delivering core rendering quality and runtime configurability in openmobilemaps/maps-core. Key features were implemented and stabilized to improve user experience and business value: 1) Tiled2D Map Zoom Level Handling with Virtual Zoom: improved tile selection/render as camera moves across zoom levels. 2) Rendering Pipeline Robustness and Transparency Improvements: fixed alpha handling, ensured per-model buffers, and aligned vertex data to prevent cross-model rendering artifacts, including iOS-specific fixes for model matrix buffers and alpha shaders. 3) Dynamic Layer Property Updates via ValueEvaluator API: exposed a ValueEvaluator interface and updateValue mechanism to allow runtime changes to vector layer properties after initialization. These changes collectively enhance visual fidelity, responsiveness of map layers, and configurability for runtime scenarios.
October 2024
11 Commits • 3 Features
Oct 1, 2024October 2024 performance highlights for openmobilemaps/maps-core. Delivered key feature work, fixed critical rendering bugs, and stabilized the build and dependencies. The main outcomes include a more precise and performant 3D camera system, a default overzoom fallback for vector maps improving visual fidelity during aggressive zoom, and a cleaner, upgrade-friendly codebase. Rendering fidelity and iOS shader stability were improved across subsystems, while maintenance work reduces release risk and simplifies future upgrades. This work translates into smoother user interactions, higher visual quality, and a more maintainable development pipeline, enabling faster iterations and onboarding of future enhancements.
11 Commits • 3 Features
Oct 1, 2024October 2024 performance highlights for openmobilemaps/maps-core. Delivered key feature work, fixed critical rendering bugs, and stabilized the build and dependencies. The main outcomes include a more precise and performant 3D camera system, a default overzoom fallback for vector maps improving visual fidelity during aggressive zoom, and a cleaner, upgrade-friendly codebase. Rendering fidelity and iOS shader stability were improved across subsystems, while maintenance work reduces release risk and simplifies future upgrades. This work translates into smoother user interactions, higher visual quality, and a more maintainable development pipeline, enabling faster iterations and onboarding of future enhancements.
October 2024
Activity
Loading activity data...
Quality Metrics
Correctness87.4%
Maintainability87.2%
Architecture84.4%
Performance81.8%
AI Usage20.2%
Skills & Technologies
Programming Languages
C++CMakeGLSLGit ConfigurationGradleJSONJavaKotlinMarkdownMetal
Technical Skills
3D GraphicsActor ModelAndroid DevelopmentAnimation HandlingAsynchronous ProgrammingAutomationBenchmarkingBuffer ManagementBug FixingBuild AutomationBuild ConfigurationBuild ManagementBuild System ConfigurationBuild SystemsC++
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline