Article
11/17/2011

Vector4.DistanceSquared Method (Vector4, Vector4)

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Calculates the distance between two vectors squared.

Namespace: Microsoft.Xna.Framework
Assembly: Microsoft.Xna.Framework.Math (in Microsoft.Xna.Framework.Math.dll)

Syntax

'Declaration
Public Shared Function DistanceSquared ( _
    value1 As Vector4, _
    value2 As Vector4 _
) As Single

public static float DistanceSquared(
    Vector4 value1,
    Vector4 value2
)

Parameters

value1
Type: Microsoft.Xna.Framework.Vector4
Source vector.

value2
Type: Microsoft.Xna.Framework.Vector4
Source vector.

Return Value

Type: System.Single
The distance between the source vectors squared.

Remarks

Distance is calculated with the formula:

sqrt((a – b)**2)

Distance squared is the value before taking the square root. Distance squared can often be used in place of distance if relative comparisons are being made. For example, consider three points A, B, and C. To determine whether B or C is further from A, compare the distance between A and B to the distance between A and C. Calculating the two distances involves two square roots, which are computationally expensive. However, using distance squared provides the same information and avoids calculating two square roots.

Version Information

Silverlight

Supported in: 5

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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