/*
        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 =