Stellarium/stellarium
Aug 2025 – Nov 2025
4 Months active
Languages Used
C++JavaScriptQMLXML
Technical Skills
Astronomy Software DevelopmentC++Data ManagementQtQt FrameworkSoftware Architecture
Ruslan Kabatsayev
PROFILE
Ruslan Kabatsayev
Over four months, B7 contributed to the Stellarium/stellarium repository by developing and refining features focused on planetary surface visualization, adaptive UI scaling, and cross-platform graphics reliability. They implemented multi-HiPS support for planets, enabling grouped survey management through the ViewDialog UI, and introduced dynamic scaling for icons and markers to ensure consistent visuals across screen resolutions. Their work included refactoring 2D rendering logic for maintainability and resolving critical bugs such as constellation rendering errors and HiDPI screenshot issues on Wayland. Using C++, Qt, and graphics programming, B7 delivered solutions that improved data discoverability, user experience, and code quality across platforms.
Overall Statistics
Feature vs Bugs
50%Features
Repository Contributions
12Total
Bugs
3
Commits
12
Features
3
Lines of code
515
Activity Months4
Work History
November 2025
1 Commits
Nov 1, 2025Month 2025-11 – Stellarium/stellarium: Delivered a critical HiDPI scaling fix for Wayland screenshots, improving screenshot fidelity and reliability for Wayland users. The change centralizes device pixel ratio retrieval via StelApp::getInstance().getDevicePixelsPerPixel() and eliminates the previous QOpenGLContext-based approach. Impact: higher-quality visuals in Wayland, fewer user-reported scaling issues, and stronger cross-graphics support. Skills demonstrated include C++, Qt, and StelApp architecture, DPI handling, and code refactor for better testability.
1 Commits
Nov 1, 2025Month 2025-11 – Stellarium/stellarium: Delivered a critical HiDPI scaling fix for Wayland screenshots, improving screenshot fidelity and reliability for Wayland users. The change centralizes device pixel ratio retrieval via StelApp::getInstance().getDevicePixelsPerPixel() and eliminates the previous QOpenGLContext-based approach. Impact: higher-quality visuals in Wayland, fewer user-reported scaling issues, and stronger cross-graphics support. Skills demonstrated include C++, Qt, and StelApp architecture, DPI handling, and code refactor for better testability.
November 2025
October 2025
7 Commits • 1 Features
Oct 1, 2025October 2025 – Stellarium/stellarium: Delivered a dynamic UI scaling feature across icons, pointers, and GUI elements to maintain consistent visuals across screen resolutions. Implemented scaling for meteor shower icon, Solar System pointer, star pointer, nomenclature pointer, and Custom Object pointer, with ScriptConsole sizing safeguards to avoid forcing button sizes. Also fixed a constellation rendering bug in StelPainter by ensuring QVector is correctly initialized before the aberration calculation loop, eliminating a use-after-free in Windows debug builds. Business impact: improved cross-device UX, rendering reliability, and reduced QA time. Demonstrated skills: C++, Qt, memory safety, UI scaling, and debugging across platforms.
October 2025
7 Commits • 1 Features
Oct 1, 2025October 2025 – Stellarium/stellarium: Delivered a dynamic UI scaling feature across icons, pointers, and GUI elements to maintain consistent visuals across screen resolutions. Implemented scaling for meteor shower icon, Solar System pointer, star pointer, nomenclature pointer, and Custom Object pointer, with ScriptConsole sizing safeguards to avoid forcing button sizes. Also fixed a constellation rendering bug in StelPainter by ensuring QVector is correctly initialized before the aberration calculation loop, eliminating a use-after-free in Windows debug builds. Business impact: improved cross-device UX, rendering reliability, and reduced QA time. Demonstrated skills: C++, Qt, memory safety, UI scaling, and debugging across platforms.
September 2025
2 Commits • 1 Features
Sep 1, 20252025-09 Stellarium/stellarium monthly summary: Delivered Celestial Object Marker Rendering Improvements with adaptive scaling of markers (meteor showers, satellites, DSOs) to maintain consistent sizes across screen resolutions. Performed internal refactor of the 2D drawing logic to reduce redundancy in drawSprite2dMode calls, boosting readability and maintainability. No critical bug fixes this month; focus was on feature delivery and code quality improvements. Impact: improved marker visibility across devices, smoother future feature extensions, and a cleaner render pipeline. Technologies/skills demonstrated: 2D rendering, adaptive UI scaling, code refactoring, cross-resolution compatibility, and performance-conscious design.
2 Commits • 1 Features
Sep 1, 20252025-09 Stellarium/stellarium monthly summary: Delivered Celestial Object Marker Rendering Improvements with adaptive scaling of markers (meteor showers, satellites, DSOs) to maintain consistent sizes across screen resolutions. Performed internal refactor of the 2D drawing logic to reduce redundancy in drawSprite2dMode calls, boosting readability and maintainability. No critical bug fixes this month; focus was on feature delivery and code quality improvements. Impact: improved marker visibility across devices, smoother future feature extensions, and a cleaner render pipeline. Technologies/skills demonstrated: 2D rendering, adaptive UI scaling, code refactoring, cross-resolution compatibility, and performance-conscious design.
September 2025
August 2025
2 Commits • 1 Features
Aug 1, 2025August 2025 — Stellarium/stellarium monthly highlights. Focused on enhancing planetary HiPS surface visualization and improving UI manageability for HiPS packs. Delivered multi-HiPS support for planets by enabling multiple HiPS surveys per planet and grouping them as a pack via the ViewDialog UI, and fixed a critical Ceres HiPS frame mapping issue to ensure correct survey identification and display. These changes improve surface representation accuracy, data discoverability, and user workflow for configuring HiPS packs.
August 2025
2 Commits • 1 Features
Aug 1, 2025August 2025 — Stellarium/stellarium monthly highlights. Focused on enhancing planetary HiPS surface visualization and improving UI manageability for HiPS packs. Delivered multi-HiPS support for planets by enabling multiple HiPS surveys per planet and grouping them as a pack via the ViewDialog UI, and fixed a critical Ceres HiPS frame mapping issue to ensure correct survey identification and display. These changes improve surface representation accuracy, data discoverability, and user workflow for configuring HiPS packs.
Activity
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Quality Metrics
Correctness95.8%
Maintainability95.0%
Architecture94.0%
Performance91.8%
AI Usage20.0%
Skills & Technologies
Programming Languages
C++JavaScriptQMLXML
Technical Skills
Astronomy Software DevelopmentBug FixBug FixingC++Code ReadabilityData ManagementGUI DevelopmentGame DevelopmentGraphicsGraphics ProgrammingMemory ManagementQtQt FrameworkSoftware ArchitectureSoftware Refactoring
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