## SIMatrix3

Object Hierarchy | Related C++ Class: CMatrix3

### Description

A double precision floating point 3 by 3 matrix.
| m0 m1 m2 |
| m3 m4 m5 |
| m6 m7 m8 |

### Methods

Get | Get2 | GetQuaternion | Invert
InvertInPlace | Mul | MulInPlace | Set
SetFromQuaternion | SetIdentity | Transpose | TransposeInPlace
TransposeInverse | TransposeInverseInPlace |  |

### Properties

Value |  |  |

### Examples

#### JScript Example

    var oRoot = Application.ActiveProject.ActiveScene.Root
    // Create two cubes, first is the original and second is rotated
    var oCube = oRoot.AddGeometry("Cube","MeshSurface", "Cube")
    var oCube2 = oRoot.AddGeometry("Cube","MeshSurface", "Cube2")
    var oTrans2 = oCube2.Kinematics.Local.Transform
    var oMat3 = XSIMath.CreateMatrix3()
    oTrans2.GetRotationMatrix3 ( oMat3 );
    // Modify the matrix to rotate around z
    oMat3.value(0,0) = Math.cos (45);
    oMat3.value(0,1) = -Math.sin (45);
    oMat3.value(1,1) = Math.cos (45);
    oMat3.value(1,0) = Math.sin (45);
    oTrans2.SetRotationFromMatrix3 ( oMat3 );
    oCube2.Kinematics.Local.Transform = oTrans2;
    var vbArr = new VBArray( oMat3.Get2() );
    var array = vbArr.toArray();
    Application.LogMessage( "SIMatrix3 after the rotation" +
            " 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] );
    // Expected results:
    //INFO : SIMatrix3 after the rotation
    //              m00:0.5253219888177297  m01:-0.8509035245341184 m02:0
    //              m10:0.8509035245341184  m11:0.5253219888177297  m12:0
    //              m20:0                   m21:0                   m22:1

### See Also

SIMatrix3.Set SIVector3 SIMatrix3 SIMatrix4 SIRotation SITransformation SIQuaternion