ttfx is a port of TerminalTextEffects (TTE).

    TerminalTextEffects
    https://github.com/ChrisBuilds/terminaltexteffects
    MIT License, Copyright (c) 2023 ChrisBuilds

Every effect in this program, the animation engine's architecture, and the
command-line interface are that project's design. This port translates the
work to Rust and reproduces its rendering exactly — frame for frame, byte for
byte — but originates none of the art.

The parity test suite compares against upstream at commit
7a91dd9ca6ee0c4f4b1484efee0ecac1bb84104e (v0.15.0). That source is not
vendored here; tools/parity/fetch_reference.sh clones it on demand.

If you enjoy these effects, the credit belongs upstream.