// // Measurements // /** * By definition one radian is the angle subtended at the centre * of a circle by an arc that is equal in length to the radius. */ export type Radians = number & { _brand: "excalimath__radian" }; /** * An angle measurement of a plane angle in which one full * rotation is 360 degrees. */ export type Degrees = number & { _brand: "excalimath_degree" }; // // Range // /** * A number range which includes the start and end numbers in the range. */ export type InclusiveRange = [number, number] & { _brand: "excalimath_degree" }; // // Point // /** * Represents a 2D position in world or canvas space. A * global coordinate. */ export type GlobalPoint = [x: number, y: number] & { _brand: "excalimath__globalpoint"; }; /** * Represents a 2D position in whatever local space it's * needed. A local coordinate. */ export type LocalPoint = [x: number, y: number] & { _brand: "excalimath__localpoint"; }; // Line /** * A line is an infinitely long object with no width, depth, or curvature. */ export type Line
= [p: P, q: P] & { _brand: "excalimath_line"; }; /** * In geometry, a line segment is a part of a straight * line that is bounded by two distinct end points, and * contains every point on the line that is between its endpoints. */ export type LineSegment
= [a: P, b: P] & { _brand: "excalimath_linesegment"; }; // // Vector // /** * Represents a 2D vector */ export type Vector = [u: number, v: number] & { _brand: "excalimath__vector"; }; // Triangles /** * A triangle represented by 3 points */ export type Triangle
= [ a: P, b: P, c: P, ] & { _brand: "excalimath__triangle"; }; /** * A rectangular shape represented by 4 points at its corners */ export type Rectangle
= [a: P, b: P] & {
_brand: "excalimath__rectangle";
};
//
// Polygon
//
/**
* A polygon is a closed shape by connecting the given points
* rectangles and diamonds are modelled by polygons
*/
export type Polygon