/*
        This example creates point locators at random surface locations,
        and positions a Null at each of these point locators.
*/
NewScene( null, false );
var root = Application.ActiveSceneRoot;
var SphereGeom = root.AddGeometry("Sphere", "NurbsSurface").ActivePrimitive.Geometry;
var NbPtLocators = 50;
var SubSurfaceArray = new Array(NbPtLocators);
var UVArray = new Array(NbPtLocators*2);
for(i = 0; i < NbPtLocators; i++)
{
        SubSurfaceArray[i] = 0;
        UVArray[i*2] = Math.random();
        UVArray[i*2+1] = Math.random();
}
var PointLocatorsFromRandomUVs = SphereGeom.ConstructPointLocators(SubSurfaceArray, UVArray);
CreateNullsAtPointLocations(SphereGeom, PointLocatorsFromRandomUVs);
function CreateNullsAtPointLocations( InGeom, InPointLocators )
{
        var SpherePositions = InGeom.EvaluatePositions(InPointLocators).toArray();
        var SphereNormals = InGeom.EvaluateNormals(InPointLocators).toArray();
        var TempVector = XSIMath.CreateVector3();
        var TempRotation = XSIMath.CreateRotation();
        for (i = 0; i < SpherePositions.length; i+=3)
        {
                var NullObj = root.AddNull();
                TempVector.Set(SpherePositions[i], SpherePositions[i+1], SpherePositions[i+2]);
                NullObj.LocalTranslation = TempVector;
                TempVector.Set(SphereNormals[i], SphereNormals[i+1], SphereNormals[i+2]);
                TempRotation.SetFromXYZAxes( TempVector, TempVector, TempVector );
                NullObj.LocalRotation = TempRotation;
        }
}