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ITransformProperty::CalcValueAtTime method

The CalcValueAtTime method calculates the property value at a particular time, using the evaluation function type that was specified for the property.

Syntax

HRESULT CalcValueAtTime(
  [in]  double      dblTime,
  [out] PROPVARIANT *varCalculatedValue
);

Parameters

dblTime [in]

The time at which to calculate the property value. This should be within the time scale specified in the XML initialization file (typically from 0.0 to 1.0).

varCalculatedValue [out]

Pointer to the value at the specified time. This value can be either a single value of any acceptable type, or an array of up to 4 float elements (type VT_R4 | VT_VECTOR).

Return value

The method returns an HRESULT of S_OK for success, or a standard COM error code for failure.

Requirements
Minimum supported client
 Windows Vista [desktop apps only]
Minimum supported server
 Windows Server 2008 [desktop apps only]
Header
GPUPipelineTime.h
Library
GPUPipelineVC8.lib (Visual Studio 2005);
GPUPipelineVC7.lib (Visual Studio .NET)

See also

ITransformProperty Interface