Module shapes 

Parametric shapes as Bezier paths in pixel space, with the start points and directions After Effects and Lottie give them, so a trim cuts them where it cuts there.

Structs

Polystar

A star or polygon, as a Lottie polystar draws it.

Vertex

One vertex of a Bezier subpath, in pixels: a point and its tangents relative to it.

Constants

KAPPA

The four-cubic circle constant: a quarter circle’s control points lie this fraction of the radius along its end tangents.

Functions

append_subpath

Appends a subpath through vertices to path: a cubic between each pair, a line where both tangents are zero, and, when closed, back to the first. A single vertex is a degenerate subpath of no length.

ellipse

The ellipse inscribed in a full size about center, turned degrees clockwise: four cubics from its top, clockwise.

polystar

A polystar’s outline: its first point straight up from the centre before rotation, the rest clockwise. Each corner’s tangents run along the circle through it, as long as the roundness times a quarter (polygon) or half (star) of the circle’s arc per corner, as Lottie rounds them.

rectangle

A rectangle of full size about center, corners rounded by radius (capped at half the shorter side), turned degrees clockwise. It starts at its top-right corner (below the corner’s arc when rounded) and runs clockwise.