/*

	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;

	}

}