/*

	This example illustrates how to detect all parameters that support instance values 

	and determine which parameters are currently in use based on the usage of the material.

	Parameters with instances values include: ImageShader.tspace_id, Material.ImageClipName, 

	Material.UV, Material.CAV.

*/

NewScene( null, false );

// Create an object with its own material

var cube = Application.ActiveSceneRoot.AddGeometry( "Cube", "MeshSurface", "MyCube" );

var mat = cube.AddMaterial( "Blinn", false, "MyMaterial" );

// Create an object with a material on a polygon cluster

var torus = Application.ActiveSceneRoot.AddGeometry( "Torus", "MeshSurface", "MyTorus" );

var cluster = torus.ActivePrimitive.Geometry.AddCluster( siPolygonCluster, "MyPolygonCluster" );

var clsmat = cluster.AddMaterial( "Phong", false, "MyMaterialOnCluster" );

// This object will get the material from the scene root.

var sphere = Application.ActiveSceneRoot.AddGeometry( "Sphere", "MeshSurface", "MySphere" );

// Create an unused material

SICreateMaterial( "Lambert", "UnusedMaterial"  );

var matlib = Application.ActiveProject.ActiveScene.ActiveMaterialLibrary;

for ( var i = 0; i < matlib.Items.Count; i++ )

{

	var mat = matlib.Items(i);

	if ( mat.UsedBy.Count == 0 )

	{

		Application.LogMessage( mat.fullname + " is unused" );

		continue;

	}

	for ( var j = 0; j < mat.Parameters.Count; j++ )

	{

		var param = mat.Parameters(j);

		if ( param.HasInstanceValue )

		{

			var colUsedBy = XSIFactory.CreateObject( "XSI.Collection" );

			colUsedBy.AddItems( mat.UsedBy );

			colUsedBy.RemoveItems( Application.ActiveSceneRoot );

			// Don't consider scene material in use - if there are no renderable objects.

			if ( colUsedBy.Count == 0 )

				Application.LogMessage( param.FullName + " belongs to the scene material and is currently unused" );

			else

				Application.LogMessage( param.FullName + " is an instance value and is being used by " 

								+ colUsedBy.GetAsText() );

		}	

	}

}

// Expected results:

//INFO : Sources.Materials.DefaultLib.Scene_Material.CAV is an instance value and is being used by MyTorus,MySphere

//INFO : Sources.Materials.DefaultLib.Scene_Material.UV is an instance value and is being used by MyTorus,MySphere

//INFO : Sources.Materials.DefaultLib.Material.CAV is an instance value and is being used by MyCube

//INFO : Sources.Materials.DefaultLib.Material.UV is an instance value and is being used by MyCube

//INFO : Sources.Materials.DefaultLib.Material1.CAV is an instance value and is being used by MyTorus.polymsh.cls.MyPolygonCluster

//INFO : Sources.Materials.DefaultLib.Material1.UV is an instance value and is being used by MyTorus.polymsh.cls.MyPolygonCluster

//INFO : Sources.Materials.DefaultLib.UnusedMaterial is unused