barycentricCoordinates

Name	Type	Description
point	Cartesian2 | Cartesian3	The point to test.
p0	Cartesian2 | Cartesian3	The first point of the triangle, corresponding to the barycentric x-axis.
p1	Cartesian2 | Cartesian3	The second point of the triangle, corresponding to the barycentric y-axis.
p2	Cartesian2 | Cartesian3	The third point of the triangle, corresponding to the barycentric z-axis.
result	Cartesian3	optional The object onto which to store the result.

Returns:

Example:

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