org.opengis.referencing.operation
Interface Matrix

All Superinterfaces:
Cloneable
All Known Subinterfaces:
XMatrix
All Known Implementing Classes:
AffineTransform2D, GeneralMatrix, Matrix1, Matrix2, Matrix3, Matrix4

@UML(identifier="PT_Matrix",
     specification=OGC_01009)
public interface Matrix
extends Cloneable

A two dimensional array of numbers. Row and column numbering begins with zero. The API for this interface matches closely the API in various matrix implementations available in Java3D, which should enable straightforward implementations. Java3D provides matrix for the general case and optimized versions for 3×3 and 4×4 cases, which are quite common in a transformation package.

Since:
GeoAPI 1.0
Author:
Martin Desruisseaux (IRD)
See Also:
Matrix3d, Matrix4d, GMatrix, AffineTransform, PerspectiveTransform, Transform3D, Jama matrix, JSR-83 Multiarray package

Method Summary
 Matrix clone()
          Returns a clone of this matrix.
 double getElement(int row, int column)
          Retrieves the value at the specified row and column of this matrix.
 int getNumCol()
          Returns the number of columns in this matrix.
 int getNumRow()
          Returns the number of rows in this matrix.
 boolean isIdentity()
          Returns true if this matrix is an identity matrix.
 void setElement(int row, int column, double value)
          Modifies the value at the specified row and column of this matrix.
 

Method Detail

getNumRow

@Extension
int getNumRow()
Returns the number of rows in this matrix.

Returns:
The number of rows in this matrix.

getNumCol

@Extension
int getNumCol()
Returns the number of columns in this matrix.

Returns:
The number of columns in this matrix.

getElement

@Extension
double getElement(int row,
                            int column)
Retrieves the value at the specified row and column of this matrix.

Parameters:
row - The row number to be retrieved (zero indexed).
column - The column number to be retrieved (zero indexed).
Returns:
The value at the indexed element.

setElement

@Extension
void setElement(int row,
                          int column,
                          double value)
Modifies the value at the specified row and column of this matrix.

Parameters:
row - The row number to be retrieved (zero indexed).
column - The column number to be retrieved (zero indexed).
value - The new matrix element value.

isIdentity

@Extension
boolean isIdentity()
Returns true if this matrix is an identity matrix.

Returns:
true if this matrix is an identity matrix.

clone

Matrix clone()
Returns a clone of this matrix.

Returns:
A clone of this matrix.
See Also:
Object.clone()


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