tachyonfx

tachyonfx is a ratatui library for creating shader-like effects in terminal UIs. This library provides a collection of effects that can be used to enhance the visual appeal of terminal applications, offering capabilities such as color transformations, animations, and complex effect combinations.

Installation

Add tachyonfx to your Cargo.toml:

tachyonfx = "0.3.0"

Overview

Effects

The library includes a variety of effects, categorized as follows:

Color Effects

• fade_from: Fades from the specified background and foreground colors
• fade_from_fg: Fades the foreground color from a specified color.
• fade_to: Fades to the specified background and foreground colors.
• fade_to_fg: Fades the foreground color to a specified color.
• hsl_shift: Changes the hue, saturation, and lightness of the foreground and background colors.
• hsl_shift_fg: Shifts the foreground color by the specified hue, saturation, and lightness over the specified duration.
• term256_colors: Downsamples to 256 color mode.

Text/Character Effects

• coalesce: The reverse of dissolve, coalesces text over the specified duration.
• dissolve: Dissolves the current text over the specified duration.
• sweep_in: Sweeps in from the specified color.
• sweep_out: Sweeps out to the specified color.

Timing and Control Effects

• consume_tick: Consumes a single tick.
• never_complete: Makes an effect run indefinitely.
• ping_pong: Plays the effect forwards and then backwards.
• repeat: Repeats an effect indefinitely or for a specified number of times or duration.
• repeating: Repeats the effect indefinitely.
• sleep: Pauses for a specified duration.
• timed_never_complete: Creates an effect that runs indefinitely but has an enforced duration.
• with_duration: Wraps an effect and enforces a duration on it.

Geometry Effects

• translate: Moves the effect area by a specified amount.
• resize_area: Resizes the area of the wrapped effect.

Combination Effects

• parallel: Runs effects in parallel, all at the same time. Reports completion once all effects have completed.
• sequence: Runs effects in sequence, one after the other. Reports completion once the last effect has completed.

Other Effects

• effect_fn: Creates custom effects from user-defined functions.

EffectTimer and Interpolations

The EffectTimer is used to control the duration and interpolation of effects. It allows for precise timing and synchronization of visual effects within your application.

Cell Selection and Area

Effects can be applied to specific cells in the terminal UI, allowing for targeted visual modifications and animations.

// only apply to cells with `Light2` foreground color
fx::sweep_in(Direction::UpToDown, 15, Dark0, timer)
    .with_cell_selection(CellFilter::FgColor(Light2.into()))

CellFilters can be combined to form complex selection criteria.

// apply effect to cells on the outer border of the area
let margin = Margin::new(1, 1);
let border_text = CellFilter::AllOf(vec![
    CellFilter::Outer(margin),
    CellFilter::Text
]);

sequence(vec![
    with_duration(duration, never_complete(fx::fade_to(Dark0, Dark0, 0))),
    fx::fade_from(Dark0, Dark0, (320, QuadOut)),
]).with_cell_selection(border_text)

Examples

Example: tweens

cargo run --example=tweens 

Example: basic-effects

cargo run --example=basic-effects 

Example: open-window

cargo run --example=open-window