Revision History

Added German translation, thanks to Stas Drisner.

In Touch Alternatives message, changed "Preferences" to "Settings" for consistency with macOS 13.

(iOS) Added option to Export images with transparent background.

(iOS) Rewrote frustum culling on GPU for better efficiency on devices with A9 or newer processors.

(iOS) Internal simplifications (CrystalFlightMeshIndexType etc.).

(iOS) Entire app re-written in Swift.

(iOS) Uses “compute shader” to pre-transform and pre-light the atoms, before rendering the crystal.

(iOS) Simplified tiling algorithm.

(legacy iOS) Changed iOS Deployment Target to iOS 14, because Apple has stopped supporting iOS 12. Thus, in particular, I no longer have a maintainable iOS 12 device to test on.

(legacy iOS) Added UINavigationBarAppearance so that navigation bars will have an opaque background when running on iOS 15.

In the SwiftUI version of GeometryGamesBufferPool, replaced buffer.allocatedSize with buffer.length, to correctly allow reuse of MTLBuffers that have the desired size. Before this fix, the app was generating new buffers every frame.

(iOS) Panels display correctly in Dark Mode.

(iOS) Split the single mesh (which contained all atoms and all bonds within a single copy of the fundamental domain) into two separate meshes (all atoms in fundamental domain and all bonds in fundamental domain), to allow "Show/Hide bonds".

(iOS) Added Italian translation, thanks to Daniela, Isabella Eva and Davide Bigatti.

(iOS) Supports multiple windows both when running on macOS and when running on iOS.

(iOS) Replaced WKWebView-based Help page with SwiftUI-based Help page.

(iOS) User interface rewritten in SwiftUI.

(iOS) iOS version now runs on Apple Silicon Macs as well as on iPhones and iPads.

(iOS) More flexible image export.

(macOS) Runs natively on both Apple Silicon and Intel Macs.

Changed various GPU uniforms, colors in buffers, etc. to half-precision (__fp16 and faux_simd_half4) where appropriate.

Added Portuguese translation, thanks to Nuno Fernandes

Renders to Wide Color (Display P3) when available.

Some of the shared code that won't be needed in the upcoming SwiftUI versions of the Geometry Games apps has been migrated to "-LEGACY" files, to allow the SwiftUI versions to include desired utilities without including legacy cruft like PixelRGBA, ImageRGBA, etc.

(iOS) Converted launch screen format from .xib to .storyboard to comply with new App Store requirements.

(iOS) Toolbar self-adjusts at runtime to default height for device (iPad or iPhone).

(iOS) Made toolbar opaque to make it brighter.

Replaced functions deprecated in iOS 13 or macOS 10.15 with non-deprecated alternatives.

(iOS) Updated for compatibility with iOS 13. In particular, it delays the presentation of the initial popover until after the base view controller has finished setting up.

(macOS) Enabled Hardened Runtime to allow Notarization by Apple.

(iOS) Added screenshots for iPad Pro (3rd Gen).

(iOS) Toolbar icons resized to 24pt, which is the new recommended size.

Old Mineralien- und Mathematikmuseum version of Crystal Flight completely re-written for public release as an iOS and macOS app