KBE3D / KBCore / Cesium / Math / equalsEpsilon

函数: equalsEpsilon()

equalsEpsilon(left: number, right: number, relativeEpsilon?: number, absoluteEpsilon?: number): boolean

Determines if two values are equal using an absolute or relative tolerance test. This is useful to avoid problems due to roundoff error when comparing floating-point values directly. The values are first compared using an absolute tolerance test. If that fails, a relative tolerance test is performed. Use this test if you are unsure of the magnitudes of left and right.

参数

left

number

The first value to compare.

right

number

The other value to compare.

relativeEpsilon?

number

The maximum inclusive delta between <code>left</code> and <code>right</code> for the relative tolerance test.

absoluteEpsilon?

number

The maximum inclusive delta between <code>left</code> and <code>right</code> for the absolute tolerance test.

返回

boolean

true if the values are equal within the epsilon; otherwise, false.

示例

const a = Cesium.Math.equalsEpsilon(0.0, 0.01, Cesium.Math.EPSILON2); // true
const b = Cesium.Math.equalsEpsilon(0.0, 0.1, Cesium.Math.EPSILON2);  // false
const c = Cesium.Math.equalsEpsilon(3699175.1634344, 3699175.2, Cesium.Math.EPSILON7); // true
const d = Cesium.Math.equalsEpsilon(3699175.1634344, 3699175.2, Cesium.Math.EPSILON9); // false