| java.lang.Object
 com.sun.perseus.j2d.Transform
| Transform | | public class Transform implements SVGMatrix(Code) | | Class for 2D transforms.
version:
$Id: Transform.java,v 1.8 2006/04/21 06:35:16 st125089 Exp $ |
| Field Summary | |
| float | m0
The (0, 0) component of this 3x3 transformation matrix. | | float | m1
The (1, 0) component of this 3x3 transformation matrix. | | float | m2
The (0, 1) component of this 3x3 transformation matrix. | | float | m3
The (1, 1) component of this 3x3 transformation matrix. | | float | m4
The (0, 2) component of this 3x3 transformation matrix. | | float | m5
The (1, 2) component of this 3x3 transformation matrix. |
| Constructor Summary | |
| public | Transform(float m0, float m1, float m2, float m3, float m4, float m5)
| | public | Transform(SVGMatrix transform)
Constructs an Transform representing the same
transform as the given Transform. |
| m0 | | float m0(Code) | | The (0, 0) component of this 3x3 transformation matrix.
|
| m1 | | float m1(Code) | | The (1, 0) component of this 3x3 transformation matrix.
|
| m2 | | float m2(Code) | | The (0, 1) component of this 3x3 transformation matrix.
|
| m3 | | float m3(Code) | | The (1, 1) component of this 3x3 transformation matrix.
|
| m4 | | float m4(Code) | | The (0, 2) component of this 3x3 transformation matrix.
|
| m5 | | float m5(Code) | | The (1, 2) component of this 3x3 transformation matrix.
|
| Transform | | public Transform(float m0, float m1, float m2, float m3, float m4, float m5)(Code) | | Constructs an Transform with a given set of
components, representing the transform:
x' = m0*x + m2*y + m4
y' = m1*x + m3*y + m5
or, representing the matrix:
[ m0 m2 m4 ]
[ m1 m3 m5 ]
[ 0 0 1 ]
Parameters:
m0 - (0, 0) matrix value
Parameters:
m1 - (1, 0) matrix value
Parameters:
m2 - (0, 1) matrix value
Parameters:
m3 - (1, 1) matrix value
Parameters:
m4 - (0, 2) matrix value
Parameters:
m5 - (1, 2) matrix value |
| Transform | | public Transform(SVGMatrix transform)(Code) | | Constructs an Transform representing the same
transform as the given Transform. Future changes
to the object supplied as the transform parameter
will not affect the newly constructed Transform.
If transform is null, the matrix is initialized
to be the identity matrix.
Parameters:
transform - defines the initialstate for the newly constructed Transform. |
| equals | | public boolean equals(Object obj)(Code) | | true if obj is a Transform and all its components are the same as this instance. |
| equals | | public boolean equals(float[][] m)(Code) | |
Parameters:
a - 6x1 float array containing the transform matrix. true if this transform is equal to the input matrix. |
| getComponent | | public float getComponent(int index) throws DOMException(Code) | | The components of the matrix denoted a to f in the API are :
[ a c e ]
[ b d f ]
[ 0 0 1 ]
Parameters:
index - component index for this matrix the component of the matrix corresponding to the index.
throws:
DOMException - - INDEX_SIZE_ERR if the index is invalid. |
| inverse | | public SVGMatrix inverse() throws SVGException(Code) | | Returns the inverse matrix.
the inverted matrix.
throws:
SVGException - - SVG_MATRIX_NOT_INVERTABLE when determinant of this matrix is zero. |
| inverse | | public SVGMatrix inverse(SVGMatrix txf) throws SVGException(Code) | | Inverses this transform and stores the resulting transform into
the input transform.
Parameters:
txf - the SVGMatrix into which the result should be stored.
throws:
SVGException - - SVG_MATRIX_NOT_INVERTABLE when determinant of this matrix is zero. |
| isIdentity | | public boolean isIdentity()(Code) | | Returns true if the current SVGMatrix
is equivalent to the identity matrix, false
otherwise.
true if this matrix is identity, false otherwise. |
| isInvertible | | public boolean isInvertible()(Code) | | Returns true if the matrix is invertible.
true if the matrix is invertible. |
| mScale | | public SVGMatrix mScale(float scaleFactorX, float scaleFactorY)(Code) | | Post-multiplies a scale transformation on the current matrix and
returns the resulting matrix.
[ scaleFactorX 0 0 ]
[ 0 scaleFactorY 0 ]
[ 0 0 1 ]
Parameters:
scaleFactorX - the factor by which coordinates are scaled along theX axis direction.
Parameters:
scaleFactorY - the factor by which coordinates are scaled along theY axis direction. this matrix scaled by the scaleFactor. |
| setTransform | | public void setTransform(float m0, float m1, float m2, float m3, float m4, float m5)(Code) | | Sets the transform to the matrix defined by the input parameters:
[ m0 m2 m4 ]
[ m1 m3 m5 ]
[ 0 0 1 ]
Parameters:
m0 - (0, 0) matrix value
Parameters:
m1 - (1, 0) matrix value
Parameters:
m2 - (0, 1) matrix value
Parameters:
m3 - (1, 1) matrix value
Parameters:
m4 - (0, 2) matrix value
Parameters:
m5 - (1, 2) matrix value |
| setTransform | | public void setTransform(SVGMatrix transform)(Code) | | Sets the transform to the value defined by the input matrix.
Parameters:
transform - the transform whose value should be copied. If null,this transform is set to identity. |
| transformPoint | | public void transformPoint(float[] pt, float[] opt)(Code) | | Transforms a point's coordinates.
Parameters:
pt - the point to transform
Parameters:
opt - the transformed point coordinates. |
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