## SIMatrix3.TransposeInverseInPlace

### Description

Sets this matrix to the transpose of the inverse of itself (if not singular): this = Transpose(this^-1)

### C# Syntax

    Int32 SIMatrix3.TransposeInverseInPlace();

### Scripting Syntax

    oBoolean = SIMatrix3.TransposeInverseInPlace();

### Return Value

Boolean True if the matrix m has been inverted (not singular); otherwise False.

### Examples

#### 1. VBScript Example

    dim m1

    ' Create 3x3 matrix.

    set m1 = XSIMath.CreateMatrix3(2.0, 3.0, 0.0, 1.0, 4.0, 0.0, 0.0, 0.0, 1.0)

    if m1.TransposeInverseInPlace then

    'do something

    else

    'do another thing

    end if

#### 2. JScript Example

    NewScene (null, false);

    var oRoot = Application.ActiveProject.ActiveScene.Root

    // Create two cubes, first is the original and second

    // is the one transpose inverse in place

    var oCube = oRoot.AddGeometry("Cube","MeshSurface", "CubeParent")

    var oCube2 = oRoot.AddGeometry("Cube","MeshSurface", "CubeParent")

    var oTrans = oCube.Kinematics.Local.Transform

    var oTrans2 = oCube2.Kinematics.Local.Transform

    var oMat3 = XSIMath.CreateMatrix3()

    oTrans2.GetRotationMatrix3 ( oMat3 );

    // Modify the matrix to scale and rotate around z

    oMat3.value(0,0) = 2 * Math.cos (45);

    oMat3.value(0,1) = -2 * Math.sin (45);

    oMat3.value(1,1) = 2 * Math.cos (45);

    oMat3.value(1,0) = 2 * Math.sin (45);

    oTrans.SetRotationFromMatrix3 ( oMat3 );

    oCube.Kinematics.Local.Transform = oTrans;

    var vbArr = new VBArray( oMat3.Get2() );

    var array = vbArr.toArray();

    Application.LogMessage( "SIMatrix3 before transpose inverse" +

    	" m00:" + array[0] + " m01:" + array[1] + " m02:" + array[2] +

    	" m10:" + array[3] + " m11:" + array[4] + " m12:" + array[5] +

    	" m20:" + array[6] + " m21:" + array[7] + " m22:" + array[8] );

    oMat3.TransposeInverseInPlace()

    oTrans2.SetRotationFromMatrix3 ( oMat3 );

    var vbArr = new VBArray( oMat3.Get2() );

    var array = vbArr.toArray();

    Application.LogMessage( "SIMatrix3 after transpose inverse" +

    	" m00:" + array[0] + " m01:" + array[1] + " m02:" + array[2] +

    	" m10:" + array[3] + " m11:" + array[4] + " m12:" + array[5] +

    	" m20:" + array[6] + " m21:" + array[7] + " m22:" + array[8] );

    oCube2.Kinematics.Local.Transform = oTrans2;

    // Expected results:

    //INFO : SIMatrix3 before transpose inverse

    //		m00:1.0506439776354594  m01:-1.7018070490682368 m02:0

    //		m10:1.7018070490682368  m11:1.0506439776354594  m12:0

    //		m20:0                   m21:0                   m22:1

    //INFO : SIMatrix3 after transpose inverse

    //		m00:0.26266099440886486 m01:-0.4254517622670592 m02:0

    //		m10:0.4254517622670592  m11:0.26266099440886486 m12:0

    //		m20:0                   m21:0                   m22:1

### See Also

SIMatrix3.TransposeInverse SIVector3 SIMatrix3 SIMatrix4 SIRotation SITransformation SIQuaternion