diff options
Diffstat (limited to 'src/geom/path.rs')
| -rw-r--r-- | src/geom/path.rs | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/src/geom/path.rs b/src/geom/path.rs index bc0d3f2d..39e75312 100644 --- a/src/geom/path.rs +++ b/src/geom/path.rs @@ -20,22 +20,35 @@ impl Path { Self(vec![]) } + /// Create a path that describes a rectangle. + pub fn rect(size: Size) -> Self { + let z = Length::zero(); + let point = Point::new; + let mut path = Self::new(); + path.move_to(point(z, z)); + path.line_to(point(size.w, z)); + path.line_to(point(size.w, size.h)); + path.line_to(point(z, size.h)); + path.close_path(); + path + } + /// Create a path that approximates an axis-aligned ellipse. pub fn ellipse(size: Size) -> Self { // https://stackoverflow.com/a/2007782 + let z = Length::zero(); let rx = size.w / 2.0; let ry = size.h / 2.0; let m = 0.551784; let mx = m * rx; let my = m * ry; - let z = Length::zero(); - let point = Point::new; + let point = |x, y| Point::new(x + rx, y + ry); let mut path = Self::new(); path.move_to(point(-rx, z)); - path.cubic_to(point(-rx, my), point(-mx, ry), point(z, ry)); - path.cubic_to(point(mx, ry), point(rx, my), point(rx, z)); - path.cubic_to(point(rx, -my), point(mx, -ry), point(z, -ry)); - path.cubic_to(point(-mx, -ry), point(-rx, -my), point(z - rx, z)); + path.cubic_to(point(-rx, -my), point(-mx, -ry), point(z, -ry)); + path.cubic_to(point(mx, -ry), point(rx, -my), point(rx, z)); + path.cubic_to(point(rx, my), point(mx, ry), point(z, ry)); + path.cubic_to(point(-mx, ry), point(-rx, my), point(-rx, z)); path } |