VBScript Object Model Examples (XSISDK)

See Object Model Reference - Additional Examples for guidelines about adding VBScript examples to this page.


'Example showing how to find the X3DObjects of the
'current Selection.

'For example if a user has selected some polygons
'or a Property or a Cluster this code shows how
'you can get the associated object.  

'Note: If multiple nested items are selected this
'code may visit the same X3DObject more than once.

For each obj in Selection

	if obj.IsClassOf( siCollectionItemID ) then
		set parentObj = obj.SubComponent.Parent3DObject
	elseif obj.IsClassOf( siX3DObjectID ) then
		set parentObj = obj
		set parentObj = obj.Parent3DObject
	end if
	'Here you can do something with each selected X3DObject
	logMessage "parentObj = " & parentObj
	logMessage "TypeName(parentObj) = " & TypeName(parentObj)


'This example demonstrates how to create image textures nodes and
'how information about them can be discovered using the Object Model.

'In particular it shows how information about the current texture can be
'discovered easily, but also how it is possible to find information about
'other textures in the render tree.  The code is structures into functions
'which can be reused in other contexts.

set oObj = BuildDemoScene

'There are 2 projections, 2 texture image shaders, and 2 image clips
'But only one set acts as "current"
logmessage "Current texture: " & oObj.Material.CurrentTexture.FullName
logmessage "Current UV: " & oObj.Material.CurrentUV.FullName
logmessage "Current Image Clip: " & oObj.Material.CurrentImageClip.FullName

set oTextureShaders = FindImageTextureNodes( oObj )

for each oTexture in oTextureShaders 
	PrintImageTextureInfo oTexture, oObj

SetDisplayMode "Camera", "texturedecal"

function BuildDemoScene
	'Creates a scene with a sphere whose material has two image textures nodes.
	'One drives the ambient of the phong and the other drives 
	'the diffuse parameter.  They use two separate projections.

	ImageFile1 = XSIUtils.BuildPath( Application.InstallationPath(siFactoryPath), _
				"Data", _
				"jaiqua_face.jpg" )			

	ImageFile2 = XSIUtils.BuildPath( Application.InstallationPath(siFactoryPath), _
				"Data", _
				"ehair_08.jpg" )			

	set oObj = ActiveSceneRoot.AddGeometry( "Sphere", "MeshSurface" )
	oObj.AddMaterial "Phong" 

	dim oPhongShader, oAmbientParam, oDiffuseParam, oShinyParam
	set oPhongShader = oObj.Material.Shaders(0)

	set oAmbientParam = oPhongShader.Parameters( "ambient" )
	set oDiffuseParam = oPhongShader.Parameters( "diffuse" )	

	dim oImageClip1, oImageClip2
	SICreateImageClip ImageFile1, ,oImageClip1	
	SICreateImageClip ImageFile2, ,oImageClip2

	dim oImageNode1,oImageNode2
	set oImageNode1 = oAmbientParam.connectfrompreset("Image", siTextureShaderFamily)
	oImageNode1.Parameters( "tex" ).Connect( oImageClip1 )
	oImageNode1.Name = "Texture1" 

	set oImageNode2 = oDiffuseParam.connectfrompreset("Image", siTextureShaderFamily)
	oImageNode2.Parameters( "tex" ).Connect( oImageClip2 )
	oImageNode2.Name = "Texture2" 

	' Connect a projection

	sProjectionName1 = "MyProjection1"
	sProjectionName2 = "MyProjection2"

	CreateProjection oObj, 	siTxtSpherical, siTxtDefaultSpherical, _
		"Texture_Support", sProjectionName1 

	CreateProjection oObj, 	siTxtSpherical, siTxtDefaultSpherical, _
		"Texture_Support", sProjectionName2  

	oImageNode1.Parameters("tspace_id").SetInstanceValue oObj,sProjectionName1 
	oImageNode2.Parameters("tspace_id").SetInstanceValue oObj,sProjectionName2 

	set BuildDemoScene = oObj
end function

sub PrintImageTextureInfo( oTexture, oObjectWithMaterial )
	'Display useful information about a Texture Shader node.
	'This code works even if the texture is not "current"

	logmessage "Texture:        " & oTexture

	strProjection = oTexture.Parameters("tspace_id").GetInstanceValue(oObjectWithMaterial)

	logmessage "    Projection: " & strProjection 

	set oImageclip = oTexture.Parameters("tex").Source
	logmessage "    Image: " & oImageclip.FullName 

	logmessage "    IsTexture: " & IsTexture( oTexture )

	bIsCurrentTexture = ( oObjectWithMaterial.Material.CurrentTexture.Name = _
						  oTexture.Name )	
	logmessage "    Current: " & bIsCurrentTexture			

	set oUVClusterProp = FindProjectionClusterProperty( oObjectWithMaterial, strProjection )

	if  typename( oUVClusterProp ) <> "Nothing" then
		logmessage "    Projection UV Data: " & oUVClusterProp.FullName
	end if			

	set oSupport = FindSupport( oObjectWithMaterial, strProjection )

	if  typename( oUVClusterProp ) <> "Nothing" then
		logmessage "    Support: " & oSupport.FullName
	end if	
end sub

function IsTexture(oShader)
	'Test whether an shader is a "Texture" shader
	'Note: This test returns True for Image textures, but also
	'      for procedural shaders like the fractal shader
	IsTexture = InStr( 1, oShader.Families, "Texture Shaders", 0 ) > 0
end function

function IsImageTexture(oShader)
	'Test more specifically whether this is an Image Shader
	'e.g. txt2d-image-explicit
	IsImageTexture= InStr( 1, oShader.ProgID, "-image", 0 ) > 0
end function

function FindImageTextureNodes(oObj)
	'Populate a XSICollection with all the Image Texture
	'shader nodes in the Material of the oObj argument

	'Limitations: This test only finds image nodes that are driven by an ImageClip
	'If the image is being generated (e.g. by a bumpmap generator) then
	'it will not be found.	
	'Also the returned collection does not include other shaders such as Real-time shaders
	'and lens flares that might be driven by an imageclip	

	set oColl = CreateObject( "XSI.Collection" )
	oColl.Unique = true

	set oImageClips = oObj.Material.ImageClips

	for each oImageClip in oImageClips

		'The Parent property would return the Shader that uses the ImageClip
		'However a single image clip can drive multiple Shaders.
		'Therefore we use the Owners property.  

		'We filter out the Scene.Clips collection which is an owner
		'of every single ImageClip.  We also filter out non-Image Textures.
		for each oOwner in oImageClip.Owners			
			if oOwner.Type = "Shader" then
				if IsImageTexture( oOwner ) then
					oColl.Add oOwner 
				end if
			end if			

	set FindImageTextureNodes= oColl

end function

function FindProjectionClusterProperty( oX3DObject, strProjectionName )
	'Find the ClusterProperty associated with
	'a particular Projection used by the Material
	'of the oX3DObject argument.
	'Note: This method does not depend on Material.CurrentUV
	'so it works for any Projection

	'Normally UV data will be underneath 
	'a cluster called "Texture_Coordinates_AUTO"	
	'but this code searches all sample clusters
	'because the cluster might have a different name
	set oCls = oX3DObject.ActivePrimitive.Geometry._
				Clusters.Filter( "sample" )

	for each oCluster in oCls
		for each oProp in oCluster.Properties				
			if oProp.Name = strProjectionName then
				set FindProjectionClusterProperty = oProp
				exit function
			end if			

end function

function FindSupport( oX3DObject, strProjectionName )
	'Find the support object associated with a 
	'particular projection for the provided X3DObject

	'It works based on the knowledge that the support
	'is nested underneath the Projection Def object,
	'which in turn is nested underneath the Projection
	'UV Data ClusterProperty

	set oUVCluster = FindProjectionClusterProperty( oX3DObject, strProjectionName )

	for each oNested in oUVCluster.NestedObjects
		if oNested.Type = "uvprojdef" then
			'Found the Projection Def object
			for each oDefNested in oNested.NestedObjects		
				if oDefNested.Type = "Texture Support" then
					set FindSupport = oDefNested
					exit function
				end if		
		end if	
end function

'Output of this example:
'INFO : Current texture: sphere.Material.Phong.Texture2
'INFO : Current UV: sphere.polymsh.cls.Texture_Coordinates_AUTO.MyProjection2
'INFO : Current Image Clip: Clips.ehair_08_jpg
'INFO : Texture:        Sources.Materials.DefaultLib.Material.Phong.Texture1
'INFO :     Projection: MyProjection1
'INFO :     Image: Sources.Materials.DefaultLib.Material.Phong.Texture1.jaiqua_face_jpg
'INFO :     IsTexture: True
'INFO :     Current: False
'INFO :     Projection UV Data: sphere.polymsh.cls.Texture_Coordinates_AUTO.MyProjection1
'INFO :     Support: Texture_Support
'INFO : Texture:        Sources.Materials.DefaultLib.Material.Phong.Texture2
'INFO :     Projection: MyProjection2
'INFO :     Image: Sources.Materials.DefaultLib.Material.Phong.Texture2.ehair_08_jpg
'INFO :     IsTexture: True
'INFO :     Current: True
'INFO :     Projection UV Data: sphere.polymsh.cls.Texture_Coordinates_AUTO.MyProjection2
'INFO :     Support: Texture_Support1


'VBScript example demonstrating how to use the View API
'to change the configuration of the "View Manager" view
set vw = desktop.activelayout.views("vm")
vw.setattributevalue "suspenddrawing","true"
vw.setattributevalue "activecamera:a","camera"
vw.setattributevalue "activecamera:b","front"
vw.setattributevalue "viewport:c","animation mixer"
vw.setattributevalue "viewport:d","explorer"
vw.setattributevalue "layout","default"
vw.setattributevalue "suspenddrawing","false"

This page was last modified 17:21, 29 Sep 2005.
This page has been accessed 11090 times.

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