More brushes

[seasick]

Is your feature request related to a problem? Please describe.
Currently this tool only supports painting single triangles, or connected faces with the same normal.
It would be good if it could support painting with a brush where size and brush model (cube, sphere, projected circle) can be changed by the user.

Describe the solution you'd like
An additional painting tool. The user can adjust a size and a brush model. The brush is a projected circle or sphere where the user only sees the intersection of model and brush. When the users moves the brush over the model and clicks, all triangles of the model within the sphere intersection should be painted (inner/outter mode for triangles only partial in the intersection?).

Additional context
https://www.reddit.com/r/react/comments/190b3lo/comment/kk4qrwp/?context=3