/*

	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 =