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