public void Rotate(double angle, RotationLineEnum rotationLine)
{
if (this.elements.Count == 0)
{
return;
}
double radians = angle.ToRadians();
this.object3d.Rotate(radians, rotationLine);
this.RedrawObject();
}
/// <summary>
/// Returns rotation matrix by specified rotation line
/// </summary>
/// <param name="rotationLineEnum">Specifies line of rotation</param>
/// <param name="alpha">An angle measured in radians</param>
/// <returns></returns>
public static double[,] GetRotationMatrix(this RotationLineEnum rotationLineEnum, double alpha)
{
double[,] rotationMatrix = null;
switch (rotationLineEnum)
{
case RotationLineEnum.AboutOX:
rotationMatrix = RotationMatrix3D.GetXRotationMatrix(alpha);
break;
case RotationLineEnum.AboutOY:
rotationMatrix = RotationMatrix3D.GetYRotationMatrix(alpha);
break;
case RotationLineEnum.AboutOZ:
rotationMatrix = RotationMatrix3D.GetZRotationMatrix(alpha);
break;
}
return(rotationMatrix);
}
/// <summary>
/// Rotate each node about specified axis by the specified angle
/// </summary>
/// <param name="alpha">An angle measured in radians</param>
/// <param name="rotateAboutEnum">Specifies line of rotation (see RotationLineEnum)</param>
public void Rotate(double alpha, RotationLineEnum rotationLineEnum)
{
//// Update mass center if it is null
this.GetMassCenter(false);
//// Move the origin to the mass center
Node prevOrigin = this.MoveTheOrigin(this.MassCenter.X, this.MassCenter.Y, this.MassCenter.Z);
//// Specify rotation matrix
double[,] rotationMatrix = rotationLineEnum.GetRotationMatrix(alpha);
//// Rotate each node about specified axis axis
for (int i = 0; i < this.Nodes.Count; i++)
{
double[] result = Matrix.Multiply(rotationMatrix, this.Nodes[i].ToVector());
this.Nodes[i].SetValuesFromVector(result);
}
//// Revert (move the origin to previous coordinate)
this.MoveTheOrigin(prevOrigin.X, prevOrigin.Y, prevOrigin.Z);
//// Update mass center
this.GetMassCenter(true);
}
