pointInsideTriangle

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

Parameters:

Name	Type	Argument	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:

Cartesian3 The modified result parameter or a new Cartesian3 instance if one was not provided.

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));

Source:

entricCoordinates.js

pointInsideTriangle

Determines if a point is inside a triangle.

Parameters:

Name	Type	Description
`point`	Cartesian2 \| Cartesian3	The point to test.
`p0`	Cartesian2 \| Cartesian3	The first point of the triangle.
`p1`	Cartesian2 \| Cartesian3	The second point of the triangle.
`p2`	Cartesian2 \| Cartesian3	The third point of the triangle.

Returns:

Boolean true if the point is inside the triangle; otherwise, false.

Example

// Returns true
var p = new Cesium.Cartesian2(0.25, 0.25);
var b = Cesium.pointInsideTriangle(p,
  new Cesium.Cartesian2(0.0, 0.0),
  new Cesium.Cartesian2(1.0, 0.0),
  new Cesium.Cartesian2(0.0, 1.0));

Source:

InsideTriangle.js