Environment Setup and Code Usage of Monster Mash code

This repo is the Monster Mash code (https://github.com/google/monster-mash/) but with some small modifications to fix building errors on Ubuntu 18.

Possible Errors

Error about filesystem:

• https://stackoverflow.com/questions/55474690/stdfilesystem-has-not-been-declared-after-including-experimental-filesystem
• https://stackoverflow.com/questions/39231363/fatal-error-filesystem-no-such-file-or-directory

Build code

Follow the official README in the original code. Besides the original steps:

• Install SDL2 by:

sudo apt-get install libsdl2-dev

• Build desktop demo:

cmake -DCMAKE_BUILD_TYPE=Release ../../src
make -j4

Code usage

Keyboard control is set up inside function keyPressEvent() in code src/mainwindow.cpp.

Common Keyboard usage:

Left Mouse: drag control points
Right Mouse: translation
Middle Mouse: rotation
1: original outline mode
2: 3D mesh mode
3: Animation mode. You can add control points by mouse first. Drag control points to generate animation.
e: Recording trajectory and animation too. Please it again to stop recording.
Space: pause aimation
s: Save all things into a zip file. Default: `/tmp/mm_project.zip`
l (lowercase L): load project zip file. 
n: reset entire scene.