public SoSFEnum<SoSliceAlphaUses> alphaUse { get; }

Public ReadOnly Property alphaUse As SoSFEnum(Of SoSliceAlphaUses)
	Get

public:
property SoSFEnum<SoSliceAlphaUses>^ alphaUse {
	SoSFEnum<SoSliceAlphaUses>^ get ();
}

member alphaUse : SoSFEnum<SoSliceAlphaUses> with get

Property Value

. Default is ALPHA_OPAQUE.

Compatibility Note: The default value changed with the release of Open Inventor version 10. In previous versions the default value was ALPHA_BINARY.

The alpha component will typically come from the transfer function, but (since Open Inventor 8.5) could come from direct rendering of an RGBA volume. The alpha values used for rendering the slice will vary depending on the value of this field.

The following table shows how the alpha value is computed according to this field and the incoming voxel alpha values:

When alphaUse field is:	ALPHA_BINARY	ALPHA_OPAQUE	ALPHA_AS_IS
Incoming Alpha value	Alpha Value Actually Used
= 0	0 (Invisible)	1 (Opaque)	0 (Invisible)
> 0	1 (Opaque)	1 (Opaque)	same as incoming

Note that this field only affects alpha values coming from the transfer function or an RGBA volume. Global transparency assigned by an OIV.Inventor.Nodes.SoMaterial node is not affected.

Reference