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11 lines
349 B
TypeScript
11 lines
349 B
TypeScript
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const getOffset = (radius: number): number => {
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if (radius === 0) {
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return 0;
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}
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// 如果要考虑通用性，这里应该用三角函数 Math.sin(45)
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// 但是这个场景比较特殊，始终是等腰直角三角形，所以直接用 Math.sqrt() 开方即可
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return radius - Math.sqrt(radius ** 2 / 2);
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};
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export default getOffset;
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