

PREV CLASS NEXT CLASS  FRAMES NO FRAMES  
SUMMARY: NESTED  FIELD  CONSTR  METHOD  DETAIL: FIELD  CONSTR  METHOD 
public interface SVGMatrix
This interface represents an "SVGMatrix" datatype, identified by an affine transform. It can be used to read and modify the values of transform attribute as per SVG specification. Note that the mTranslate, mMultiply, mScale and mRotate methods in this interface mutate the SVGMatrix object and return a reference to the SVGMatrix instance itself, after performing the necessary matrix operation.
This matrix transforms source coordinates (x, y) into destination coordinates (x', y') by considering them to be a column vector and multiplying the coordinate vector by the matrix according to the following process:
[ x' ] [ a c e ] [ x ] [ a.x + c.y + e ] [ y' ] = [ b d f ] [ y ] = [ b.x + d.y + f ] [ 1 ] [ 0 0 1 ] [ 1 ] [ 1 ]
Method Summary  

float 
getComponent(int index)
Returns a component of the matrix by component's zerobased index. 

SVGMatrix 
inverse()
Returns a new instance of SVGMatrix containing the inverse of the current matrix. 

SVGMatrix 
mMultiply(SVGMatrix secondMatrix)
Performs matrix multiplication. 

SVGMatrix 
mRotate(float angle)
Postmultiplies a rotation transformation on the current matrix and returns the resulting current matrix. 

SVGMatrix 
mScale(float scaleFactor)
Postmultiplies a uniform scale transformation on the current matrix and returns the resulting current matrix. 

SVGMatrix 
mTranslate(float x,
float y)
Postmultiplies a translation transformation on the current matrix and returns the resulting current matrix. 
Method Detail 

float getComponent(int index) throws DOMException
Returns a component of the matrix by component's zerobased index. getComponent(0) is a, getComponent(1) is b, etc.
index
 the index of the matrix component to retrieve.
DOMException
 INDEX_SIZE_ERR if the index
is invalid.SVGMatrix mMultiply(SVGMatrix secondMatrix)
Performs matrix multiplication. This matrix is postmultiplied by another matrix, returning the resulting current matrix.
secondMatrix
 the matrix to postmultiply with.
NullPointerException
 if secondMatrix
is null.SVGMatrix inverse() throws SVGException
Returns a new instance of SVGMatrix
containing the inverse of the current matrix.
SVGException
 SVG_MATRIX_NOT_INVERTABLE when determinant of this matrix is zero.SVGMatrix mTranslate(float x, float y)
Postmultiplies a translation transformation on the current matrix and returns the resulting current matrix.
This is equivalent to calling multiply(T), where T is an
SVGMatrix
object represented by the following matrix:
[ 1 0 x ] [ 0 1 y ] [ 0 0 1 ]
x
 the distance by which coordinates are translated in the X axis direction.y
 the distance by which coordinates are translated in the Y axis direction.
SVGMatrix mScale(float scaleFactor)
Postmultiplies a uniform scale transformation on the current matrix and returns the resulting current matrix.
This is equivalent to calling multiply(S), where S is an SVGMatrix
object represented by the following matrix:
[ scaleFactor 0 0 ] [ 0 scaleFactor 0 ] [ 0 0 1 ]
scaleFactor
 the factor by which coordinates are scaled along the X and Y axis.
SVGMatrix mRotate(float angle)
Postmultiplies a rotation transformation on the current matrix and returns the resulting current matrix.
This is equivalent to calling multiply(R), where R is an
SVGMatrix
object represented by the following matrix:
[ cos(angle) sin(angle) 0 ] [ sin(angle) cos(angle) 0 ] [ 0 0 1 ]
angle
 the angle of rotation in degrees.


PREV CLASS NEXT CLASS  FRAMES NO FRAMES  
SUMMARY: NESTED  FIELD  CONSTR  METHOD  DETAIL: FIELD  CONSTR  METHOD 
Copyright 19992011 Research In Motion Limited. 295 Phillip Street, Waterloo, Ontario, Canada, N2L 3W8. All Rights Reserved.
Java is a trademark of Oracle America Inc. in the US and other countries.
Legal