MatrixTform Struct Reference

This structure describes a transformation, in "descriptive" form and matrix form. More...

#include <AITransformTypes.h>

List of all members.

Public Attributes
AIRealMatrix	matrix
AIRealPoint	origin
bool	originInMatrix
	True if the origin is incorporated into the matrix, and points can be transformed by the matrix directly.
TransformType	type
TransformUnion	tu

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Detailed Description

This structure describes a transformation, in "descriptive" form and matrix form.

If originInMatrix is true, the origin is incorporated into the matrix, and points can be transformed by the matrix directly. If not, the matrix represents a transformation around (0,0), and to transform points, they must first be translated by -origin, then transformed by the matrix, then translated back by +origin.

Some transformations cannot be represented with the origin in the matrix because they would get fixed point overflow in the h and v components; for example, scaling by any factor over 8 around an origin near the center of the screen.

The TransformUnion struct is sometimes a more convenient description for transforming patterns, gradients, text anchors, and graph elements. If type is compoundTransformType, though, only tu.sca.strokeStyle is looked at if tu.sca.doLines is true.

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Member Data Documentation

AIRealMatrix MatrixTform::matrix

AIRealPoint MatrixTform::origin

bool MatrixTform::originInMatrix

True if the origin is incorporated into the matrix, and points can be transformed by the matrix directly.

TransformUnion MatrixTform::tu

TransformType MatrixTform::type

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The documentation for this struct was generated from the following file:

• AITransformTypes.h