pointInsideTriangle(point, p0, p1, p2) → Boolean
        Determines if a point is inside a triangle.
    
    
    
    
    
    
        
| 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:
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));