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Fchart3 changelog

0.12.2 (2025-01-25)

Added

  • New fchart3-atlas tool for generating multi-page sky atlases (including install/script changes).
  • Support for additional map projections configurable via config and CLI (including fisheye/equidistant-style projections).
  • Improvements to the all-sky workflow and new options related to horizon clipping (e.g. clip_to_horizon).
  • Expanded Solar System object support plus helper search utilities (stars/SS/moons) and trajectory computations.
  • Comet support (MPC comet import + trajectory computation).
  • Minor planet support (MPCORB file handling, trajectory computation, new CLI options).
  • Stellarium skyculture JSON support in CLI/config, including constellation parsing.
  • Optional “enhanced” Milky Way rendering (shading) and updated defaults for nebula rendering.

Changed

  • CLI: legends are hidden by default.
  • Major configuration refactor (simplification/unification, cfg structure, dataclasses, typed/enumerated options).
  • Codebase refactoring and module/package moves (e.g. astronomy computations consolidated under astro, solar_system moved under cli).
  • Configuration/layout tweaks for constellation-line spacing and various rendering/layout adjustments (e.g. magnitude scale widget, cardinal directions).
  • Trajectory engine refactor to support multiple trajectories (not just a single one) and updated step computation logic.

Fixed

  • Fixed equatorial grid rendering in horizontal-coordinate mode.
  • Minor fixes/cleanup in method signatures and helpers (e.g. unknown_object).
  • Fixes related to Stellarium landscapes (azimuth handling, polygon horizon quirks, related edge cases).

Breaking changes / migration notes

  • CLI argument parsing changed in a few places (e.g. width/height flag adjustments and added short options); verify your command lines.
  • Config/API refactors (settings -> cfg, dataclasses, enums) and module moves may require import/config updates in downstream integrations.

Changes v0.11.1 (2025-11-08)

New features

  • Added support for rendering planets (including the Sun and Moon) and their moons in finder charts, with basic planetary disks integrated into the existing sky rendering.
  • Planets and their moons can now be selected as chart objects; the Sun and Moon are intentionally non-selectable to avoid accidental selection.
  • Added numeric field-of-view (FoV) overlay.
  • Added configurable highlights, including magnitude limits.
  • Added user object lists, allowing custom target sets to be used directly in chart generation.

Planets and moons

  • Use real planetary radii for drawing relative sizes.
  • Implemented planetary phase rendering, including fixes for mirrored phases and phase-angle sign errors.
  • Implemented a prototype of Saturn’s rings with improved orientation and rotation.
  • Added a catalog of planetary moons, including magnitude evaluation and optional display of moon magnitudes.
  • Improved positioning of moon labels (increased offset from symbol and optimised label placement).

Coordinate systems and horizon

  • Introduced basic horizontal coordinates for charts, using the equatorial field centre for consistent projections.
  • Added drawing of horizon and horizontal grid, including fixes to horizon rendering.
  • Added optional equatorial grid in horizontal coordinates.
  • Added cardinal direction markers (N, E, S, W) for better orientation.

Star catalog (Gaia)

  • Migrated the deep star catalog from NOMAD to Gaia.
  • Introduced matrix-based coordinate transformations for robust handling of Gaia data.
  • Fixed HIP identifiers and ensured HIP fields are consistently initialised.

Milky Way and deep sky

  • Added 10k and 30k “enhanced” Milky Way map variants for more detailed rendering at high zoom levels.
  • Optimised Milky Way rendering, including the enhanced variant and supporting data structures.
  • Reduced memory usage for deep-sky object (DSO) catalogs.

Performance, memory and compatibility

  • Optimised geodesic grid initialisation, including numpy-based conversions and improved memory handling.
  • Added support for numpy 2.0 and updated array handling where necessary.
  • Various numerical fixes in phase/position-angle and related calculations.

UI, widgets and rendering backend

  • Added configurable Moon scale in widgets.
  • Improved robustness of map scale widgets (safer handling of missing coordinates).
  • Skia drawing backend: - Initial integration of Skia-based rendering. - Typeface caching in SkiaDrawing to reduce overhead and improve performance.

Internal changes

  • Broader modularisation of the codebase, splitting large modules and cleaning up imports.
  • General code cleanup: removal of dead code, parameter reorganisation, and minor maintenance updates.