Core guide

Paths and polygons

Build reusable polygon fills and curved stroke geometry from copied input data.

Live example

See Paths and polygons in action

See a curved stroke and polygon fill prepared from reusable geometry.

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How it works

Path and polygon constructors copy caller data. Updates validate before replacing geometry, and handles remain scoped to the game that created them.

Public types

PathHandle
PolygonHandle
FlattenedSubpath
TriangulatedPolygon
GeometryHandle

Minimum viable example

const route = create_path([move_to(0, 0), quadratic_to(40, -30, 80, 0)]);
const marker = create_polygon([{ x: 0, y: 0 }, { x: 40, y: 0 }, { x: 20, y: 30 }]);
route.update([move_to(0, 0), line_to(100, 20)]);

Scope and limitations

Holes, fill rules, and filled curved paths are Phase 3 candidates.