flo_curves = "0.2"

flo_curves

flo_curves is a library providing routines for manipulating various types of curve, particularly Bezier curves. It provides a grab-bag of algorithms, from the basis functions for generating points on a curve to collisions, fitting to points and even path arithmetic. It is built around traits, which makes it easy to use the provided algorithms with any data structure, though some defaults are provided.

flo_curves is designed as a support library for flowbetween, an animation tool I'm working on, but is also designed to work stand-alone.

Examples

Creating a curve:

use flo_curves::*;
use flo_curves::bezier;

let curve = bezier::Curve::from_points(Coord2(1.0, 2.0), (Coord2(2.0, 0.0), Coord2(3.0, 5.0)), Coord2(4.0, 2.0));

Finding a point on a curve:

use flo_curves::bezier;

let pos = curve.point_at_pos(0.5);

Intersections:

use flo_curves::bezier;

for (t1, t2) in bezier::curve_intersects_curve_clip(curve1, curve2) {
    let pos = curve1.point_at_pos(t1);
    println!("Intersection, curve1 t: {}, curve2 t: {}, position: {}, {}", t1, t2, pos.x(), pos.y());
}

Creating a path:

use flo_curves::bezier;
use flo_curves::bezier::path::*;

let rectangle1 = BezierPathBuilder::<SimpleBezierPath>::start(Coord2(1.0, 1.0))
    .line_to(Coord2(5.0, 1.0))
    .line_to(Coord2(5.0, 5.0))
    .line_to(Coord2(1.0, 5.0))
    .line_to(Coord2(1.0, 1.0))
    .build();

Path artihmetic:

use flo_curves::bezier::path::*;

let rectangle_with_hole = path_sub::<_,_,_, SimpleBezierPath>(&vec![rectangle], &vec![circle])