Modifier and Type | Field and Description |
---|---|
static int |
I11
the row=1, col=1 position ('a') in the matrix.
|
static int |
I12
the row=1, col=2 position ('b') in the matrix.
|
static int |
I13
the row=1, col=3 position (always 0 for 2-D) in the matrix.
|
static int |
I21
the row=2, col=1 position ('c') in the matrix.
|
static int |
I22
the row=2, col=2 position ('d') in the matrix.
|
static int |
I23
the row=2, col=3 position (always 0 for 2-D) in the matrix.
|
static int |
I31
the row=3, col=1 ('e', or X translation) position in the matrix.
|
static int |
I32
the row=3, col=2 ('f', or Y translation) position in the matrix.
|
static int |
I33
the row=3, col=3 position (always 1 for 2-D) in the matrix.
|
private float[] |
vals
the values inside the matrix (the identity matrix by default).
|
Constructor and Description |
---|
Matrix()
constructs a new Matrix with identity.
|
Matrix(float tx,
float ty)
Constructs a matrix that represents translation
|
Matrix(float a,
float b,
float c,
float d,
float e,
float f)
Creates a Matrix with 6 specified entries
|
Modifier and Type | Method and Description |
---|---|
boolean |
equals(Object obj)
Checks equality of matrices.
|
float |
get(int index)
Gets a specific value inside the matrix.
|
float |
getDeterminant()
Computes the determinant of the matrix.
|
int |
hashCode()
Generates a hash code for this object.
|
Matrix |
multiply(Matrix by)
multiplies this matrix by 'b' and returns the result
See http://en.wikipedia.org/wiki/Matrix_multiplication
|
Matrix |
subtract(Matrix arg)
Subtracts a matrix from this matrix and returns the results
|
String |
toString()
Generates a String representation of the matrix.
|
public static final int I11
public static final int I12
public static final int I13
public static final int I21
public static final int I22
public static final int I23
public static final int I31
public static final int I32
public static final int I33
private final float[] vals
For reference, the indeces are as follows:
I11 I12 I13
I21 I22 I23
I31 I32 I33
public Matrix()
public Matrix(float tx, float ty)
tx
- ty
- public Matrix(float a, float b, float c, float d, float e, float f)
a
- b
- c
- d
- e
- f
- public float get(int index)
For reference, the indeces are as follows:
I11 I12 I13
I21 I22 I23
I31 I32 I33
index
- an array index corresponding with a value inside the matrixpublic Matrix multiply(Matrix by)
by
- The matrix to multiply bypublic Matrix subtract(Matrix arg)
arg
- the matrix to subtract from this matrixpublic float getDeterminant()
public boolean equals(Object obj)
equals
in class Object
obj
- the other Matrix that needs to be compared with this matrix.Object.equals(java.lang.Object)
public int hashCode()
hashCode
in class Object
Object.hashCode()
public String toString()
toString
in class Object
Object.toString()
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