Algernon22.02 - App Store

Algernon is an associatively parametric 2D geometry calculator and CAD tool.

Points, lines, and circles can be constructed with relationships between them and in terms of variables and mathematical formulae. If any one element or variable changes, the geometry is automatically recalculated.

The geometry can be interrogated, dimensioned, inked, annotated with text, and printed (via AirPrint or e-mail export of PDF).

Aimed primarily at engineers and mathematicians (both practising and studying) It is ideally suited for computing geometrical constructions, designing or checking mechanical details, architectural layouts, etc.

Algernon does not need lots of drawing tools; it just needs one for each kind of element. It can automatically determine what kind of construction to create based upon where the user taps. This keeps the user interface clean, simple, and consistent, without restricting its sophistication. It may seem strange at first to those used to conventional CAD, but we believe it will be found natural after a short time.

The app incorporates help and reference documentation, sample model files, and introductory video demonstration.

Salient features:

* Point, line, and circle construction elements.

* Constructions of intersections, bisections, and tangents.
- Can solve circle tangential to 3 others.

* Mathematical formulae can be specified as parameters (e.g. position, radius, etc.).

* Variables can be created.
- Geometrical elements can be used within formulae.
- Time can be used to create animations.

* Constructed geometry can be dimensioned:
- Linear, including projections.
- Circle radius and diameter.
- Angles (radians and degrees).
- Arc-lengths.
- Internal and external layout.

* Ink can be drawn over constructed geometry:
- To calculate areas, centroids, and perimeters.
- For printing/PDF.

* Annotation text can be added.

* Drawing styles can be created, giving control of:
- Construction line colour.
- Ink pen width and colour.
- Ink dash style.
- Text font and size.
- Dimensioning units.

* Save, print, and e-mail drawings, and export as PDF or DXF.

Version History * Fixed bug when running on iOS15 whereby the formula entry field would expand to obscure buttons. 22.02 03/18/2022 * Fixed bug that limited access to iCloud files. 20.06 06/17/2020 * Now uses the standard iOS document browser. This makes import/export easier and allows documents to be arranged in folders.

* Due to the significant changes in file handling, we recommend backing up your documents before updating (e.g. via e-mail or iTunes). 19.10 11/04/2019 Improved compatibility with iOS 11 and iPhone X. 18.02 04/09/2018 * Updates relating to iOS 10. Fixes potential crash when exporting files. 1.10 11/21/2016 Text can now be constructed to fit within a rectangle.
Changes to keyboard arrangement and input to reduce ambiguity of buttons.
Miscellaneous improvements. 1.08 06/07/2016 * Added DXF export.
* Added Airdrop for supported devices.
* Numerous new operators and functions, such as area and centroid parameters.
* Time can be used in calculations, e.g. for animated models.
* Text can incorporate calculations.
* Inked regions can be filled with colour.
* Miscellaneous improvements. 1.04 06/18/2015 * Moved variables manager to its own tab.
* Moved styles manager to its own tab.
* Enhanced on-screen keyboard.
* Added function list to on-screen keyboard.
* Expanded in-app help documentation.
* Miscellaneous improvements. 1.02 05/11/2015 1.00 07/19/2014