Shader semantics supported by Viewport 2.0

The following semantics are recognized and supported for use with shaders in Viewport 2.0. They can be used when authoring full effects which are accessed as MShaderInstance objects using the MShaderManager class. They may also be applied to the parameters of fragments which are registered using MFragmentManager.

NoteThe dx11Shader.mll plug-in is an MPxShaderOverride. Therefore, it must parse the effects to determine and bind the semantics manually. By comparison, both the fragment system and MShaderInstance do all this automatically; however, they are both also more restrictive.

Semantic	Usage	Type	Group
World	World transformation	Matrix	Item
WorldTranspose	World transformation, transposed	Matrix	Item
WorldInverse	World transformation, inverted	Matrix	Item
WorldInverseTranspose	World transformation, inverted and transposed	Matrix	Item

View	View transformation	Matrix	Frame
ViewTranspose	View transformation, transposed	Matrix	Frame
ViewInverse	View transformation, inverted	Matrix	Frame
ViewInverseTranspose	View transformation, inverted and transposed	Matrix	Frame

Projection	Projection transformation	Matrix	Frame
ProjectionTranspose	Projection transformation, transposed	Matrix	Frame
ProjectionInverse	Projection transformation, inverted	Matrix	Frame
ProjectionInverseTranspose	Projection transformation, inverted and transposed	Matrix	Frame

WorldView	World-view transformation	Matrix	Item
WorldViewTranspose	World-view transformation, transposed	Matrix	Item
WorldViewInverse	World-view transformation, inverted	Matrix	Item
WorldViewInverseTranspose	World-view transformation, inverted and transposed	Matrix	Item

ViewProjection	View-projection transformation	Matrix	Frame
ViewProjectionTranspose	View-projection transformation, transposed	Matrix	Frame
ViewProjectionInverse	View-projection transformation, inverted	Matrix	Frame
ViewProjectionInverseTranspose	View-projection transformation, inverted and transposed	Matrix	Frame

WorldViewProjection	World-view-projection transformation	Matrix	Item
WorldViewProjectionTranspose	World-view-projection transformation, transposed	Matrix	Item
WorldViewProjectionInverse	World-view-projection transformation, inverted	Matrix	Item
WorldViewProjectionInverseTranspose	World-view-projection transformation, inverted and transposed	Matrix	Item

ViewDirection	World-space direction of the view (camera)	Float3	Frame
ViewPosition	World-space position of the view (camera)	Float3	Frame
LocalViewer	Whether a local or non-local view direction is to be used	bool	Frame

ViewportPixelSize	Dimensions of the current viewport in pixels, width and height	Float2	Frame

ClippingPlanes	The coefficients of active clipping planes, one float4 per plane	Float4 Array	Clipping
ClippingPlaneCount	The number of active clipping planes	Int	Clipping

AlphaTestFunction	The alpha test comparison function 1 = Never 2 = Less 3 = Equal 4 = Less or Equal 5 = Greater 6 = Not Equal 7 = Greater or Equal 8 = Always	Int	Alpha Test
AlphaTestReference	The alpha test reference value, in the range of (0.0, 1.0)	Float	Alpha Test

RelativeViewportDimensions	Specifies relative viewport dimensions	Float2	Frame

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