29 lines
622 B
TypeScript
29 lines
622 B
TypeScript
export type Vector = {
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x: number;
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y: number;
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};
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export type Radian = number;
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export const degree = (value: number) => ((value / 180) * Math.PI) as Radian;
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export const sub = (v1: Vector, v2: Vector) =>
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({
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x: v1.x - v2.x,
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y: v1.y - v2.y,
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}) as Vector;
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export const add = (v1: Vector, v2: Vector) =>
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({
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x: v1.x + v2.x,
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y: v1.y + v2.y,
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}) as Vector;
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export const theta = ({ x, y }: Vector) => Math.atan2(y, x) as Radian;
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export const rotate = ({ x, y }: Vector, rad: Radian) =>
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({
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x: x * Math.cos(rad) - y * Math.sin(rad),
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y: x * Math.sin(rad) + y * Math.cos(rad),
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}) as Vector;
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