## differential-growth

A Rust implementation of the differential growth algorithm

### 4 releases(2 breaking)

 0.3.1 Jul 5, 2023 Aug 1, 2022 Jul 31, 2022 Jul 31, 2022

#7 in #generative-art

MIT/Apache

360KB
236 lines

# Differential Growth Rust

## Overview

This crate provides a very easy to use Differential Growth algorithm as well as an example sketch using the excellent nannou crate. It's as simple as providing a Vec of starting points, calling [DifferentialGrowth::tick()] to advance one iteration of the algorithm and obtaining the new state using [DifferentialGrowth::get_points()].

Get up and running quickly by using an included point generator function like [generate_points_on_circle()] to generate your starting points.

Having a basic knowledge of the differential growth algorithm is highly recommended:

## Example

The best way to understand this crate is by taking a look at /example folder. You can run it on any platform running cargo run --example example.

Otherwise, below is a quick reference on how to use this crate.

# use differential_growth::{generate_points_on_circle, DifferentialGrowth};
# use nalgebra::Point2;
# use nannou::{event::Update, prelude::*, window, App, Frame};

// Generate a set of starting points.
// You do not have to use the included helper function,
// you could for example pass points drawn by the mouse.
let starting_points: Vec<Point2<f64>> = generate_points_on_circle(0.0, 0.0, 10.0, 10);
// Instantiate DifferentialGrowth.
// the choice of input parameters is very import to the
// succesful working of the algorithm. A value to big or too small
// or a wrong combination of values can make the algorithm behave
// like it doesn't work.
// Here I've provided values that I tested and like.
let mut dg = DifferentialGrowth::new(starting_points, 1.5, 1.0, 14.0, 1.1, 5.0);

// Advance the algorithm 1 iteration.
dg.tick();

// Get the newly calculated points.
let points_to_draw: Vec<Point2<f64>> = dg.get_points();

// draw the result by
// - drawing a line between consecutive Vec elements.
// - drawing a line between the first and the last element.

~3MB
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