/*

	This example demonstrates how to set a map lookup shader on a parameter 

	and then test it for supported maps

*/

NewScene( null, false );

// Create a grid with a map lookup shader

var root = Application.ActiveProject.ActiveScene.Root;

var grid = root.AddGeometry( "Grid", "MeshSurface" );

BlendInPresets( "Image", grid, 1, false );

CreateProjection( grid, siTxtSpherical, siTxtDefaultSpherical, "TxtSupport", "TxtProjection" );

var filename = Application.InstallationPath( siFactoryPath ) + "\\Data\\XSI_SAMPLES\\Pictures\\xsilogo.jpg";

var imageclip = CreateImageClip( filename, "XSILogo" );

var mat = grid.Material;

var shaders = mat.FindShaders( siShaderFilter );

var textureshader = shaders("Image");

var txtparam = textureshader.Parameters("tspace_id");

// Don't want to deal with cluster to find UVW prop

txtparam.SetInstanceValue( grid, "TxtProjection" );

var txtuvw = txtparam.GetInstanceValue( grid, true );		// true == bind to object

var cav = grid.ActivePrimitive.Geometry.AddVertexColor();

var weightmap = CreateWeightMap( "WeightMap", grid, "Weight_Map" )(0);

var txtmap = Create2DMap( grid, "Texture_Map", siDefaultPropagation )(0);

txtmap.Parameters("ImageClipName").Value = imageclip.Name;

txtmap.Parameters("UVReference").SetInstanceValue( grid, txtuvw );

var polycls = grid.ActivePrimitive.Geometry.AddCluster( siPolygonCluster,"RenderMapCluster" );

var rendermap = polycls.AddProperty( "RenderMap" );

// Replace image shader with map lookup 

var ambient_blend = shaders("ambient_blend");

var maplookup = ambient_blend.Parameters("color1").ConnectFromProgID( "Softimage.map_lookup_color" );

var mapparam = maplookup.Parameters("map");

// Setup maps array

var maps = Array( weightmap, cav, txtuvw, txtmap, rendermap );

// Test map lookup shader for supported maps

for ( var i = 0; i < maps.length; i++ ) {

	if ( mapparam.IsSupportedInstanceValue( grid, maps[i] ) ) {

		Application.LogMessage( mapparam.FullName + " parameter supports objects of "+ maps[i].Type );

	} else {

		Application.LogMessage( mapparam.FullName + " parameter does not supports objects of "+ maps[i].Type );

	}

}

// Expected results:

//INFO : grid.Scene_Material1.Phong.ambient_blend.Softimage.map parameter supports objects of wtmap

//INFO : grid.Scene_Material1.Phong.ambient_blend.Softimage.map parameter supports objects of vertexcolor

//INFO : grid.Scene_Material1.Phong.ambient_blend.Softimage.map parameter supports objects of uvspace

//INFO : grid.Scene_Material1.Phong.ambient_blend.Softimage.map parameter supports objects of TextureProp

//INFO : grid.Scene_Material1.Phong.ambient_blend.Softimage.map parameter does not supports objects of rendermap