D2D1ComputeMaximumScaleFactor function

Computes the maximum factor by which a given transform can stretch any vector.

Syntax


FLOAT D2D1ComputeMaximumScaleFactor(
  _In_ const D2D1_MATRIX_3X2_F *matrix
);

Parameters

matrix [in]

The input transform matrix.

Return value

The scale factor.

Remarks

Formally, if M is the input matrix, this method will return the maximum value of |V * M| / |V| for all vectors V, where |.| denotes length.

Note  Since this describes how M affects vectors (rather than points), the translation components (_31 and _32) of M are ignored.
 

Requirements

Minimum supported client

Windows 8.1 [desktop apps | Windows Store apps]

Minimum supported server

Windows Server 2012 R2 [desktop apps | Windows Store apps]

Minimum supported phone

Windows Phone 8.1 [Windows Phone Silverlight 8.1 and Windows Runtime apps]

Header

D2d1_1.h

Library

D2d1.lib

DLL

D2d1.dll

 

 

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