public SoSFDouble undefinedValue { get; }

Public ReadOnly Property undefinedValue As SoSFDouble
	Get

public:
property SoSFDouble^ undefinedValue {
	SoSFDouble^ get ();
}

member undefinedValue : SoSFDouble with get

Property Value

By default, this field is set to NaN (Not a Number), meaning that no specific value is excluded. Otherwise, the value must match the data type.

Limitations: There are several limitations in order for the undefined value to work:

• The texturePrecision must be at least equal to the number of significant bits of the data type.

• The data type must be BYTE, SHORT (either SIGNED or UNSIGNED) or FLOAT

• The field is ignored in the following classes : OIV.VolumeViz.Nodes.SoHeightFieldProperty, OIV.VolumeViz.Nodes.SoHeightFieldPropertyMask and OIV.VolumeViz.Nodes.SoVolumeMask. Setting this field has no effect in these cases.

Note: If the application uses custom shaders, particularly when overriding the VVizComputeFragmentColor() function:

• Undefined values are handled in the GLSL function VVizTransferFunction().

• If the voxel value is undefined, VVizTransferFunction() returns the RGBA value 0,0,0,0. You may return this value for your undefined value.

• If the application's shader does not call VVizTransferFunction() (e.g. voxel color is computed without using a colormap), the application's shader must explicity check for undefined values. This can be done using the function VVizIsUndefined()

  Note
  Field available since Open Inventor 10.11

Reference