ParticleShape

type ParticleShape =
    | SquareShape
    | CircleShape
    | StarShape
    | PolygonShape
    | PathShape
    | TextShape
    | ImageShape
    | CustomShape;

Controls the way a particle is drawn onto the canvas.

Every shape is drawn in the same space: centered at (0, 0), fitting inside a 1x1 box from -0.5 to 0.5, with +y pointing down, as it would on a regular canvas. That box is then scaled to the particle’s size, rotated by its orientation, and the fillStyle is set to its (lit) color. Built-in and path shapes are filled with this color, while custom shapes draw themselves.