/*
	This example illustrates how to set instance values on a shared material parameter
	Applies to parameters: ImageShader.tspace_id, Material.ImageClipName, Material.UV, Material.CAV.
*/
NewScene( null, false );
var app = Application;
var scene = app.ActiveProject.ActiveScene;
var root = scene.Root;
// Create cube with a texture projection (not connected)
var cube = root.AddGeometry( "Cube", "MeshSurface", "MyCubeWithTexture" );
// Create projection for cube
CreateProjection( 
	cube, 
	siTxtCubic, 
	siTxtDefaultCubic , 
	"MyCubicTextureSupport", 
	"MyCubicTextureProjection" ); 
// Create sphere with a texture projection (not connected)
var sphere = root.AddGeometry( "Sphere", "MeshSurface", "MySphereWithTexture" );
// Create projection for sphere
CreateProjection( 
	sphere, 
	siTxtSpherical, 
	siTxtDefaultSpherical, 
	"MySphericalTextureSupport", 
	"MySphericalTextureProjection" ); 
// Create a group with a material hooked up to texture image
var objs = XSIFactory.CreateObject( "XSI.Collection" );
objs.Add( cube );
objs.Add( sphere );
var group = root.AddGroup( objs, "MyGroup", false );
var mat = group.AddMaterial( "Blinn", false, "MyGroupMaterialWithTexture" );
var shaders = mat.Shaders;
var blinn = shaders(0);
var ambient = blinn.Parameters("ambient");
var diffuse = blinn.Parameters("diffuse");
// Create image clip
var strFileName = app.InstallationPath( siFactoryPath ) + "\\Data\\XSI_SAMPLES\\Pictures\\xsilogo.jpg";
var imageclip = CreateImageClip( strFileName, "MyImageClip" );
// Connect imageshader1 to blinn.ambient
var imageshader1 = ambient.ConnectFromPreset( "Image", siTextureShaderFamily );
// Connect imageshader2 to blinn.diffuse
var imageshader2 = diffuse.ConnectFromPreset( "Image", siTextureShaderFamily );
// Connect the imageshader1.tex to imageclip
var tex = imageshader1.Parameters("tex");
tex.Connect( imageclip );
// get tspace_id from imageshader
var tspace_id = imageshader1.Parameters("tspace_id");
// set the cube.material.image.tspace_id = MyCubicTextureProjection
tspace_id.SetInstanceValue( cube, "MyCubicTextureProjection" );
// set the sphere.material.image.tspace_id = MySphericalTextureProjection
tspace_id.SetInstanceValue( sphere, "MySphericalTextureProjection" );
// Dump all shader parameter instance values for each objects found using 
// a material from the active  material library
var matlib = scene.ActiveMaterialLibrary;
for ( var i=0; i<matlib.Items.Count; i++ ) {
	var mat = matlib.Items(i);
	// Get all shaders in materials shader tree
	var shaders = mat.FindShaders( siShaderFilter );
	for ( j=0; j<shaders.Count; j++ ) {	
		var shader = shaders(j);
		for ( var k=0; k<shader.Parameters.Count; k++ ) {
			var shader_param = shader.Parameters(k);
			// If the shader parameter has an instance value look up
			// its object value
			if ( shader_param.HasInstanceValue ) {
				var eObjs = new Enumerator( mat.UsedBy );
				for ( ; !eObjs.atEnd(); eObjs.moveNext() ) {
					var obj = eObjs.item();
					var instancevalue = shader_param.GetInstanceValue( obj );
					// Log parameter instance value for object
					app.LogMessage( obj.name + " " + shader.Name + " " + shader_param.Name + " = " + instancevalue  );
				}
			}
		}
	}	
}
// Expected results:
//INFO : MyCubeWithTexture Image tspace_id = MyCubicTextureProjection
//INFO : MySphereWithTexture Image tspace_id = MySphericalTextureProjection
//INFO : MyCubeWithTexture Image1 tspace_id = 
//INFO : MySphereWithTexture Image1 tspace_id =