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Changelog

Version 0.10.0

Added

  • New material properties: shear modulus, tensile and compressive strength
  • Option to change the definition of the draw length to the AMO convention
  • Option to specify the arrow mass relative to the draw force or the stored energy
  • Dedicated result page for arrow position, velocity and acceleration
  • Dedicated result page for the force-draw curve and its stiffness
  • New output results for the string tip and string center angles
  • Indication of material failure based on stresses and strains
  • Detailed breakdown of the energy remaining in the limbs and string and lost to damping
  • Creation of backup files before converting models to a newer version
  • Simulations can be run with unsaved bow models
  • Option to export the 3D view of the limb(s) as an image
  • More and better error messages
  • Additional and improved tooltips throughout the user interface
  • Verification tests for the numerical methods
  • Verification tests for beam statics and dynamics
  • Verification tests for many of the bow simulation outputs

Changed

  • Complete rewrite and redesign of the solver for better accuracy, performance and robustness
  • Use of implicit time integration with an adaptive step size for dynamic analysis
  • More accurate computation of damping forces
  • More restrictive rules for layer heights to prevent malformed geometries
  • Width and height plots show arc length instead of relative position, where possible
  • Layer stress results are now divided by tension and compression
  • More fine-grained evaluation of stresses and strains

Fixed

  • Memory leak on macOS

Removed

  • Support for Intel-based macOS

Version 0.9.1

Fixed

  • Wrong unit on string length result
  • Error in computation of the limb geometry that leads to unwanted sharp limb tips

Version 0.9.0

Added

  • Configurable units for all inputs and outputs (including SI and US units)
  • Easier way to model the profile using line, arc, spiral and spline segments
  • Option to visualize the curvature of the profile
  • Option to overlay images over plots
  • Plot contents can be exported as CSV files
  • Input fields for numbers accept arithmetic expressions
  • Better error message on failed bracing

Changed

  • Different layout of the bow editor based on panels instead of dialogs
  • Material properties are edited separately from the layer properties
  • Improved monotonic cubic spline interpolation (width and height)
  • Automatically convert the decimal comma to a dot for keyboard layouts that use a comma
  • The number of layers is no longer limited (previously 15)
  • The number of table rows is no longer limited (previously 100)

Fixed

  • Error when saving files to a path that contains special characters
  • Missing error handling when loading and saving files
  • Colors in the stress plot not always easily distinguishable

Version 0.8.0

Added

  • Arrow clamp force parameter to prevent the arrow from leaving the bow too early in some cases

Changed

  • Main windows are now empty until a file is loaded or created
  • Allow layers to have zero height for modeling fadeouts
  • Renamed 'storage ratio' to 'energy storage factor'
  • Show minimum and maximum stresses instead of maximum absolute value
  • The y-axis of the energy plot always starts at zero
  • Increase resolution of images exported from plots
  • New icons for the toolbar, menu actions and model tree
  • Better random color generation for the layers
  • Visual improvements to the limb view

Fixed

  • Action New File ignored modifications to already loaded files
  • Remove files from Open Recent menu if they no longer exist
  • Wrong default selection between static/dynamic results

Version 0.7.1

Fixed

  • Missing libraries for VirtualBow Solver and Post on MacOS
  • Static/Dynamic buttons in VirtualBow Post not working on MacOS
  • Simulation failing with Error: bad_function_call for certain lengths of the profile curve

Version 0.7.0

Added

  • Separate component VirtualBow Post for viewing simulation results
  • Separate component VirtualBow Solver for performing simulations
  • Damping parameters for limbs and string
  • Show kinetic energy of limbs and string at arrow departure
  • Show mass of limbs and string
  • Show maximum forces and stresses
  • Help menu entry that opens the user manual
  • File menu entry Open Recent
  • Indicate in the profile, width and height plots which points are being edited
  • Remember open tab and simulation mode in VirtualBow Post
  • Play buttons for the output slider in VirtualBow Post
  • Go to menu for the output slider in VirtualBow Post
  • Option to add installation directory to PATH on Windows

Changed

  • Application logo
  • Compile with MinGW under Windows for better simulation performance
  • The profile curve now has continuous curvature, no more jumps
  • Keep the blue default color on stress plots when there is only one layer
  • More ticks on the y-axis of the stress plots and others

Fixed

  • Problem that VCRUNTIME_140_1.dll was not found under Windows
  • Short flashing of the console window when starting VirtualBow on Windows

Removed

  • Most of the menu icons, except very specific ones
  • Releases for 32 bit Windows
  • AppImage releases

Version 0.6.1

Fixed

  • Error when trying to read the simulation output on Windows with the Python example script

Version 0.6.0

Added

  • Support for MacOS
  • Support for rpm based Linux distributions
  • Output limb curvature

Changed

  • Use monotonic cubic splines for layer width and height interpolation
  • Define the offsets of the limb centerline in terms of setback and handle length parameters

Fixed

  • Crash when loading an invalid .bow file from the command line
  • Problem with face orientation of the limb geometry in the 3D view

Version 0.5.0

Added

  • Possibility to define laminated bows
  • Support for 64 bit Windows
  • Cancel and Reset buttons for input dialogs
  • Grouping options for the energy plot
  • Copy, cut and paste on all tables

Changed

  • Use desktop theme icons on Linux where appropriate
  • Save window sizes and reload them on startup

Fixed

  • Initial state t = 0 missing from the dynamic output data
  • Program terminates when GUI is started with invalid file

Version 0.4.0

Added

  • More robust static simulation by using line searching
  • Contact handling for simulating recurve bows
  • New output result: Grip force
  • New output result: String force

Changed

  • Don't start the simulation when draw length is smaller than brace height

Version 0.3.0

Added

  • Command line interface for starting simulations without the GUI
  • Store simulation results in binary .dat files
  • Compatibility for older .bow files

Changed

  • Replace sampling time with sampling rate/frequency in the dynamics settings

Version 0.2.0

Added

  • Tree based bow editor
  • 3D view of the limb geometry
  • Energies in user selected plots

Fixed

  • Ticks on opposite plot axis didn't fit together
  • Crash when section height is zero
  • Crash when cancel is clicked right after starting the simulation

Removed

  • Support for MacOS

Version 0.1.0

Added

  • Platform support for Windows, Linux and MacOS
  • New GUI using the Qt framework