KBE3D / KBCore / Cesium / barycentricCoordinates

函数: barycentricCoordinates()

barycentricCoordinates(point: Cartesian3 | Cartesian2, p0: Cartesian3 | Cartesian2, p1: Cartesian3 | Cartesian2, p2: Cartesian3 | Cartesian2, result?: Cartesian3): Cartesian3 | undefined

Computes the barycentric coordinates for a point with respect to a triangle.

参数

point

The point to test.

Cartesian3 | Cartesian2

p0

The first point of the triangle, corresponding to the barycentric x-axis.

Cartesian3 | Cartesian2

p1

The second point of the triangle, corresponding to the barycentric y-axis.

Cartesian3 | Cartesian2

p2

The third point of the triangle, corresponding to the barycentric z-axis.

Cartesian3 | Cartesian2

result?

Cartesian3

The object onto which to store the result.

返回

Cartesian3 | undefined

The modified result parameter or a new Cartesian3 instance if one was not provided. If the triangle is degenerate the function will return undefined.

示例

// Returns Cartesian3.UNIT_X
const p = new Cesium.Cartesian3(-1.0, 0.0, 0.0);
const b = Cesium.barycentricCoordinates(p,
  new Cesium.Cartesian3(-1.0, 0.0, 0.0),
  new Cesium.Cartesian3( 1.0, 0.0, 0.0),
  new Cesium.Cartesian3( 0.0, 1.0, 1.0));