# Point4D.Equals Method

## Definition

Compares two Point4D structures for equality.

## Overloads

Equals(Object) |
Determines whether the specified Object is a Point4D structure and if the X, Y, Z, and W properties of the specified Object are equal to the X, Y, Z, and W properties of this Point4D structure. |

Equals(Point4D) |
Compares two Point4D structures for equality. |

Equals(Point4D, Point4D) |
Compares two Point4D structures for equality. |

## Equals(Object)

```
public:
override bool Equals(System::Object ^ o);
```

`public override bool Equals (object o);`

`override this.Equals : obj -> bool`

`Public Overrides Function Equals (o As Object) As Boolean`

#### Parameters

- o
- Object

The object to compare.

#### Returns

`true`

if instances are equal; otherwise, `false`

.

`true`

if `o`

(the passed Object) is a Point4D structure and is identical with this Point4D structure; `false`

otherwise.

### Examples

The following example shows how to check whether an Object and a Point4D structure are equal.

```
// Compares an Object and a Point4D for equality using the non-static Equals method.
Point4D point1 = new Point4D(10, 5, 1, 4);
Point4D point2 = new Point4D(15, 40, 60, 75);
Boolean areEqual;
areEqual = point1.Equals(point2);
// areEqual is False. point2 is a Point4D structure, but it is not equal to point1.
// Displaying Results
syntaxString = "areEqual = point1.Equals(point2);";
resultType = "Boolean";
operationString = "Checking if two 3D points are equal";
ShowResults(areEqual.ToString(), syntaxString, resultType, operationString);
```

```
' Compares an Object and a Point4D for equality using the non-static Equals method.
Dim point1 As New Point4D(10, 5, 1, 4)
Dim point2 As New Point4D(15, 40, 60, 75)
Dim areEqual As Boolean
areEqual = point1.Equals(point2)
' areEqual is False. point2 is a Point4D structure, but it is not equal to point1.
' Displaying Results
syntaxString = "areEqual = point1.Equals(point2)"
resultType = "Boolean"
operationString = "Checking if two 3D points are equal"
ShowResults(areEqual.ToString(), syntaxString, resultType, operationString)
```

### Remarks

If `o`

(the passed object) is not a Point4D structure, this method returns `false`

.

Because a Double value can lose precision when arithmetic operations are performed on them, a comparison between two Point4D values that are logically equal might fail.

### See also

## Equals(Point4D)

Compares two Point4D structures for equality.

```
public:
bool Equals(System::Windows::Media::Media3D::Point4D value);
```

`public bool Equals (System.Windows.Media.Media3D.Point4D value);`

`override this.Equals : System.Windows.Media.Media3D.Point4D -> bool`

`Public Function Equals (value As Point4D) As Boolean`

#### Parameters

- value
- Point4D

The instance of Point4D to compare to this instance.

#### Returns

`true`

if instances are equal; otherwise, `false`

.

### Remarks

Because a Double value can lose precision when arithmetic operations are performed on them, a comparison between two Point4D values that are logically equal might fail.

### See also

## Equals(Point4D, Point4D)

Compares two Point4D structures for equality.

```
public:
static bool Equals(System::Windows::Media::Media3D::Point4D point1, System::Windows::Media::Media3D::Point4D point2);
```

`public static bool Equals (System.Windows.Media.Media3D.Point4D point1, System.Windows.Media.Media3D.Point4D point2);`

`static member Equals : System.Windows.Media.Media3D.Point4D * System.Windows.Media.Media3D.Point4D -> bool`

`Public Shared Function Equals (point1 As Point4D, point2 As Point4D) As Boolean`

#### Parameters

#### Returns

### Examples

The following example shows how to check whether two Point4D structures are equal.

```
// Checks if two Point4D structures are equal using the static Equals method.
// point1's x,y,z,w properties set when the structure is created
Point4D point1 = new Point4D(10, 5, 1, 4);
Point4D point2 = new Point4D();
Boolean areEqual;
// settting point2's x,y,z,w properties
point2.X = 15;
point2.Y = 40;
point2.Z = 60;
point2.W = 75;
areEqual = Point4D.Equals(point1, point2);
// areEqual is False
//Displaying Results
syntaxString = "areEqual = Point4D.Equals(point1, point2);";
resultType = "Boolean";
operationString = "Checking if 3D two points are equal";
ShowResults(areEqual.ToString(), syntaxString, resultType, operationString);
```

```
' Checks if two Point4D structures are equal using the static Equals method.
' point1's x,y,z,w properties set when the structure is created
Dim point1 As New Point4D(10, 5, 1, 4)
Dim point2 As New Point4D()
Dim areEqual As Boolean
' settting point2's x,y,z,w properties
point2.X = 15
point2.Y = 40
point2.Z = 60
point2.W = 75
areEqual = Point4D.Equals(point1, point2)
' areEqual is False
'Displaying Results
syntaxString = "areEqual = Point4D.Equals(point1, point2)"
resultType = "Boolean"
operationString = "Checking if 3D two points are equal"
ShowResults(areEqual.ToString(), syntaxString, resultType, operationString)
```

### Remarks

Two Point4D structures are equal if the values of their X, Y, Z, and W properties are the same.

Because Double values can lose precision when arithmetic operations are performed on them, a comparison between two Point4D instances that are logically equal might fail.