## SIVector3.NegateInPlace

### Description

Negates this vector: this = - this

### C# Syntax

    SIVector3.NegateInPlace();

### Scripting Syntax

    SIVector3.NegateInPlace();

### Examples

#### VBScript Example

    dim v1

    ' Create 3D vectors.

    set v1 = XSIMath.CreateVector3(1.0, 2.0, 3.0)

    v1.Set 1.0, 2.0, 3.0

    'v1 = -v1

    v1.NegateInPlace

### See Also

SIVector3.Negate SIVector3 SIMatrix3 SIMatrix4 SIRotation SITransformation SIQuaternion