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Frite

Frite is a non-linear 2D animation software developed as part of the MoStyle ANR project by Melvin Even, Pierre Bénard and Pascal Barla.

The animation system is described in the following publication:

Non-linear Rough 2D Animation using Transient Embeddings. Melvin Even, Pierre Bénard, Pascal Barla. Computer Graphics Forum (Eurographics), Wiley, 2023.

It is originally based on Pencil2D.

Note: This is research software. As such, it may fail to run, crash, or otherwise not perform as expected. It is not intended for regular use in any kind of production pipeline.

Dependencies

They are automatically downloaded by cmake during the project configuration.

Build instructions

  1. Download and install Qt 6 open source (https://www.qt.io/download)
  2. Clone the repository and follow the build instructions depending on your OS:

On Linux/macOS

Tested on Ubuntu 20.04 with GCC 9.3.0 and macOS (12.6) with Clang 14.

cd frite
mkdir build
cd build
cmake -DCMAKE_BUILD_TYPE=Release ..
make

On Windows

Tested on Windows 10 with Visual Studio 2019, cmake-gui and vcpkg (https://github.com/microsoft/vcpkg)

Packages to install with vcpkg:

  • libjpeg-turbo:x64-windows
  • libpng:x64-windows
  • zlib:x64-windows

Build:

cd frite
mkdir build
cd build
cmake -G "Visual Studio 16 2019" -A x64 -DCMAKE_BUILD_TYPE=Release -DCMAKE_PREFIX_PATH=<path to Qt cmake dir> -DCMAKE_TOOLCHAIN_FILE=<path to vcpkg cmake> -DVCPKG_TARGET_TRIPLET=x64-windows ..
cmake --build . --config Release

Or open the Visual Studio solution.

Multi-touch Wacom tablet on Ubuntu

For multi-touch inputs in Qton Ubuntu, "gestures" must be disabled. In the terminal, run the commands:

xsetwacom --list devices
# trouver l'id correspondant au type TOUCH (ici 13)
xsetwacom --get 13 Gesture off

Keyboard shortcuts

Tools

Action Shortcut
Draw P
Eraser E
Pan Hold middle mouse button or H to toggle
Clear frame K
Select group (lasso) S
Create group (lasso) G
Warp selected group W
Trajectory T
Spacing I

Actions

Action Shortcut
Toggle onion skin O
Automatic registration * M
Single-step registration * Ctrl+M
Regularize lattice R
Add breakdown B
Cross-fade (copy next KF strokes in pre group) C
Copy the selected group into the next keyframe Shift+C
Delete selected group Del
Deselect group Esc or Ctrl+Shift+A
Deselect (in all KF of the current layer) Shift+Esc

* For these actions holding Ctrl will use the entire next keyframe as the registration target.

Timeline

Action Shortcut
Play/pause Spacebar
Change frame Left/right arrow
Change keyframe Ctrl + left/right arrow