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title	id	challengeType	videoUrl	localeTitle
Circles of given radius through two points	5951815dd895584b06884620	5		给定半径的圆圈通过两个点

Description

给定平面上的两个点和半径，通常可以通过这些点绘制给定半径的两个圆。

例外：零半径应视为从不描述圆（除非点是重合的）。如果这些点是重合的，则可以绘制无限数量的圆，其圆周上的点可以被绘制，除非半径也等于零，然后将圆圈折叠到一个点。如果点形成直径，则返回单个圆。如果这些点相距太远则无法绘制圆圈。任务：实现一个取两个点和一个半径的函数，并通过这些点返回两个圆。对于每个结果圆，提供每个圆的中心的坐标，四舍五入到四个十进制数字。将每个坐标作为数组返回，并作为数组数组进行坐标。对于边缘情况，请返回以下内容：如果点在直径上，则返回一个点。如果半径也为零，则返回"Radius Zero" 。如果点重合，则返回"Coincident point. Infinite solutions" 。如果点与直径相距更远，则返回"No intersection. Points further apart than circle diameter"更远的"No intersection. Points further apart than circle diameter" 。样本输入：

 p1 p2 r
0.1234,0.9876 0.8765,0.2345 2.0
0.0000,2.000000 0.0000,0.0000 1.0
0.1234,0.9876 0.1234,0.9876 2.0
0.1234,0.9876 0.8765,0.2345 0.5
0.1234,0.9876 0.1234,0.9876 0.0

参考：从数学论坛@Drexel的2点和半径中找到一个圆心

Instructions

Tests

tests:
  - text: <code>getCircles</code>是一个函数。
    testString: 'assert(typeof getCircles === "function", "<code>getCircles</code> is a function.");'
  - text: '<code>getCircles([0.1234, 0.9876], [0.8765, 0.2345], 2.0)</code>应该返回<code>[[1.8631, 1.9742], [-0.8632, -0.7521]]</code> 。'
    testString: 'assert.deepEqual(getCircles(...testCases[0]), answers[0], "<code>getCircles([0.1234, 0.9876], [0.8765, 0.2345], 2.0)</code> should return <code>[[1.8631, 1.9742], [-0.8632, -0.7521]]</code>.");'
  - text: '<code>getCircles([0.0000, 2.0000], [0.0000, 0.0000], 1.0)</code>应该返回<code>[0, 1]</code>'
    testString: 'assert.deepEqual(getCircles(...testCases[1]), answers[1], "<code>getCircles([0.0000, 2.0000], [0.0000, 0.0000], 1.0)</code> should return <code>[0, 1]</code>");'
  - text: '<code>getCircles([0.1234, 0.9876], [0.1234, 0.9876], 2.0)</code>应返回<code>Coincident point. Infinite solutions</code>'
    testString: 'assert.deepEqual(getCircles(...testCases[2]), answers[2], "<code>getCircles([0.1234, 0.9876], [0.1234, 0.9876], 2.0)</code> should return <code>Coincident point. Infinite solutions</code>");'
  - text: '<code>getCircles([0.1234, 0.9876], [0.8765, 0.2345], 0.5)</code>应返回<code>No intersection. Points further apart than circle diameter</code>'
    testString: 'assert.deepEqual(getCircles(...testCases[3]), answers[3], "<code>getCircles([0.1234, 0.9876], [0.8765, 0.2345], 0.5)</code> should return <code>No intersection. Points further apart than circle diameter</code>");'
  - text: '<code>getCircles([0.1234, 0.9876], [0.1234, 0.9876], 0.0)</code>应返回<code>Radius Zero</code>'
    testString: 'assert.deepEqual(getCircles(...testCases[4]), answers[4], "<code>getCircles([0.1234, 0.9876], [0.1234, 0.9876], 0.0)</code> should return <code>Radius Zero</code>");'

Challenge Seed

function getCircles (...args) {
  // Good luck!
  return true;
}

After Test

console.info('after the test');

Solution

// solution required

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