XFORM

The XFORM structure specifies a world-space to page-space transformation.

typedef struct _XFORM { // xfrm

FLOAT eM11;

FLOAT eM12;

FLOAT eM21;

FLOAT eM22;

FLOAT eDx;

FLOAT eDy;

} XFORM;

Members

eM11

Specifies the following:

Operation	Meaning
Scaling	Horizontal scaling component
Rotation	Cosine of rotation angle
Reflection	Horizontal component

eM12

Specifies the following:

Operation	Meaning
Shear	Horizontal proportionality constant
Rotation	Sine of the rotation angle

eM21

Specifies the following:

Operation	Meaning
Shear	Vertical proportionality constant
Rotation	Negative sine of the rotation angle

eM22

Specifies the following:

Operation	Meaning
Scaling	Vertical scaling component
Rotation	Cosine of rotation angle
Reflection	Vertical reflection component

eDx

Specifies the horizontal translation component.

eDy

Specifies the vertical translation component.

Remarks

The following list describes how the members are used for each operation:

Operation	eM11	eM12	eM21	eM22
Rotation	Cosine	Sine	Negative sine	Cosine
Scaling	Horizontal scaling component	Nothing	Nothing	Vertical Scaling Component
Shear	Nothing	Horizontal Proportionality Constant	Vertical Proportionality Constant	Nothing
Reflection	Horizontal Reflection Component	Nothing	Nothing	Vertical Reflection Component

See Also

ExtCreateRegion, GetWorldTransform, ModifyWorldTransform, PlayEnhMetaFile, SetWorldTransform

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