15 lines
344 B
TypeScript
15 lines
344 B
TypeScript
export type Vec2 = [number, number];
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export function add(x: Vec2, y: number | Vec2): Vec2 {
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const z = typeof y === "number" ? [y, y] : y;
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return [x[0] + z[0], x[1] + z[1]];
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}
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export function neg(v: Vec2): Vec2 {
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return [-v[0], -v[1]];
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}
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export function scale(v: Vec2, amount: number): Vec2 {
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return [v[0] * amount, v[1] * amount];
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}
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