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NSAffineTransform.m

Authors

Ovidiu Predescu (ovidiu@net-community.com)
Richard Frith-Macdonald (richard@brainstorm.co.uk)
This class provides a way to perform affine transforms. It provides a matrix for transforming from one coordinate system to another.

Copyright: (C) 1996,1999 Free Software Foundation, Inc.


Contents -

  1. Software documentation for the NSAffineTransform class
  2. Software documentation for the NSAffineTransform(GNUstep) category

Software documentation for the NSAffineTransform class

NSAffineTransform : NSObject

Declared in:
AppKit/NSAffineTransform.h
Conforms to:
NSCopying
NSCoding
Availability: Not in OpenStep/MacOS-X

Description forthcoming.


Instance Variables

Method summary

transform 

+ (NSAffineTransform*) transform;
Availability: Not in OpenStep/MacOS-X

Return an autoreleased instance of this class.


appendTransform: 

- (void) appendTransform: (NSAffineTransform*)aTransform;
Availability: Not in OpenStep/MacOS-X

Appends the transform matrix to the receiver. This is done by performing a matrix multiplication of the receiver with aTransform so that aTransform is the first transform applied to the user coordinate. The new matrix then replaces the receiver's matrix.


concat 

- (void) concat;
Availability: Not in OpenStep/MacOS-X

Concatenates the receiver's matrix with the one in the current graphics context.


initWithTransform: 

- (id) initWithTransform: (NSAffineTransform*)aTransform;
Availability: Not in OpenStep/MacOS-X

Initialize the receiever's instance with the instance represented by aTransform.


invert 

- (void) invert;
Availability: Not in OpenStep/MacOS-X

Calculates the inverse of the receiver's matrix and replaces the receiever's matrix with it.


prependTransform: 

- (void) prependTransform: (NSAffineTransform*)aTransform;
Availability: Not in OpenStep/MacOS-X

Prepends the transform matrix to the receiver. This is done by performing a matrix multiplication of the receiver with aTransform so that aTransform is the last transform applied to the user coordinate. The new matrix then replaces the receiver's matrix.


rotateByDegrees: 

- (void) rotateByDegrees: (float)angle;
Availability: Not in OpenStep/MacOS-X

Applies the rotation specified by angle in degrees. Points transformed with the transformation matrix of the receiver are rotated counter-clockwise by the number of degrees specified by angle.


rotateByRadians: 

- (void) rotateByRadians: (float)angleRad;
Availability: Not in OpenStep/MacOS-X

Applies the rotation specified by angle in radians. Points transformed with the transformation matrix of the receiver are rotated counter-clockwise by the number of radians specified by angle.


scaleBy: 

- (void) scaleBy: (float)scale;
Availability: Not in OpenStep/MacOS-X

Scales the transformation matrix of the reciever by the factor specified by scale.


scaleXBy: yBy: 

- (void) scaleXBy: (float)scaleX yBy: (float)scaleY;
Availability: Not in OpenStep/MacOS-X

Scales the X axis of the receiver's transformation matrix by scaleX and the Y axis of the transformation matrix by scaleY.


set 

- (void) set;
Availability: Not in OpenStep/MacOS-X

Get the currently active graphics context's transformation matrix and set it into the receiver.


setTransformStruct: 

- (void) setTransformStruct: (NSAffineTransformStruct)val;
Availability: Not in OpenStep/MacOS-X

Sets the structure which represents the matrix of the reciever. The struct is of the form:

{m11, m12, m21, m22, tX, tY}


transformBezierPath: 

- (NSBezierPath*) transformBezierPath: (NSBezierPath*)aPath;
Availability: Not in OpenStep/MacOS-X

Applies the receiver's transformation matrix to each point in the bezier path, then returns the result. The original bezier path is not modified.


transformPoint: 

- (NSPoint) transformPoint: (NSPoint)aPoint;
Availability: Not in OpenStep/MacOS-X

Transforms a single point based on the transformation matrix. Returns the resulting point.


transformSize: 

- (NSSize) transformSize: (NSSize)aSize;
Availability: Not in OpenStep/MacOS-X

Transforms the NSSize represented by aSize using the reciever's transformation matrix. Returns the resulting NSSize.


transformStruct 

- (NSAffineTransformStruct) transformStruct;
Availability: Not in OpenStep/MacOS-X

Returns the NSAffineTransformStruct structure which represents the matrix of the reciever. The struct is of the form:

{m11, m12, m21, m22, tX, tY}


translateXBy: yBy: 

- (void) translateXBy: (float)tranX yBy: (float)tranY;
Availability: Not in OpenStep/MacOS-X

Applies the translation specified by tranX and tranY to the receiver's matrix. Points transformed by the reciever's matrix after this operation will be shifted in position based on the specified translation.




Instance Variables for NSAffineTransform Class

matrix

@public NSAffineTransformStruct matrix;

Description forthcoming.





Software documentation for the NSAffineTransform(GNUstep) category

NSAffineTransform(GNUstep)

Declared in:
AppKit/NSAffineTransform.h
Availability: Gui 0.0

Description forthcoming.

Method summary

boundingRectFor: result: 

- (void) boundingRectFor: (NSRect)rect result: (NSRect*)newRect;
Availability: Gui 0.0

Description forthcoming.


concatenateWith: 

- (void) concatenateWith: (NSAffineTransform*)anotherMatrix;
Availability: Gui 0.0

Description forthcoming.


concatenateWithMatrix: 

- (void) concatenateWithMatrix: (const float[6])anotherMatrix;
Availability: Gui 0.0

Description forthcoming.


deltaPointInMatrixSpace: 

- (NSPoint) deltaPointInMatrixSpace: (NSPoint)point;
Availability: Gui 0.0

Description forthcoming.


getMatrix: 

- (void) getMatrix: (float[6])replace;
Availability: Gui 0.0

Description forthcoming.


inverse 

- (void) inverse;
Availability: Gui 0.0

Description forthcoming.


isRotated 

- (BOOL) isRotated;
Availability: Gui 0.0

Description forthcoming.


makeIdentityMatrix 

- (void) makeIdentityMatrix;
Availability: Gui 0.0

Description forthcoming.


pointInMatrixSpace: 

- (NSPoint) pointInMatrixSpace: (NSPoint)point;
Availability: Gui 0.0

Description forthcoming.


rectInMatrixSpace: 

- (NSRect) rectInMatrixSpace: (NSRect)rect;
Availability: Gui 0.0

Description forthcoming.


rotationAngle 

- (float) rotationAngle;
Availability: Gui 0.0

Description forthcoming.


scaleTo: : 

- (void) scaleTo: (float)sx : (float)sy;
Availability: Gui 0.0

Description forthcoming.


setFrameOrigin: 

- (void) setFrameOrigin: (NSPoint)point;
Availability: Gui 0.0

Description forthcoming.


setFrameRotation: 

- (void) setFrameRotation: (float)angle;
Availability: Gui 0.0

Description forthcoming.


setMatrix: 

- (void) setMatrix: (const float[6])replace;
Availability: Gui 0.0

Description forthcoming.


sizeInMatrixSpace: 

- (NSSize) sizeInMatrixSpace: (NSSize)size;
Availability: Gui 0.0

Description forthcoming.


takeMatrixFromTransform: 

- (void) takeMatrixFromTransform: (NSAffineTransform*)aTransform;
Availability: Gui 0.0

Description forthcoming.


translateToPoint: 

- (void) translateToPoint: (NSPoint)point;
Availability: Gui 0.0

Description forthcoming.



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