some extra utils

This commit is contained in:
Elizabeth Hunt 2023-12-02 22:51:23 -07:00
parent c97078c1dc
commit 33c0bad9e3
Signed by: simponic
GPG Key ID: 52B3774857EB24B1
3 changed files with 24 additions and 0 deletions

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@ -1,2 +1,3 @@
export * from "./jsonds"; export * from "./jsonds";
export * from "./point2d"; export * from "./point2d";
export * from "./str";

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@ -7,3 +7,25 @@ export const l2Norm = (p1: Vec2, p2: Vec2) =>
Math.sqrt(Math.pow(p2.x - p1.x, 2) + Math.pow(p2.y - p1.y, 2)); Math.sqrt(Math.pow(p2.x - p1.x, 2) + Math.pow(p2.y - p1.y, 2));
export const isDiagAdj = (p1: Vec2, p2: Vec2) => l2Norm(p1, p2) <= Math.sqrt(2); export const isDiagAdj = (p1: Vec2, p2: Vec2) => l2Norm(p1, p2) <= Math.sqrt(2);
export const neighbors = (p1: Vec2, max: Vec2) => {
const ns: Vec2[] = [];
const { x, y } = p1;
for (let dy = -1; dy <= 1; dy++) {
for (let dx = -1; dx <= 1; dx++) {
const [newX, newY] = [dx + x, dy + y];
if (
!(dy === dx && dy === 0) &&
newX >= 0 &&
newX < max.x &&
newY < max.y &&
newY >= 0
) {
ns.push({ x: newX, y: newY });
}
}
}
return ns;
};
export const;

1
utils/str.ts Normal file
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@ -0,0 +1 @@
export const isNumeric = (symbol: string) => symbol <= "9" && symbol >= "0";