public static Plane getPlaneFromPosition(IfcPlacement pos)
{
Point3D org = getPoint3DFromIfcCartesianPoint(pos.Location);
Vector3D xAxis = null, yAxis = null, zAxis = null;
if (pos is IfcAxis1Placement)
{
throw new Exception("IfcAxis1Placement");
}
else if (pos is IfcAxis2Placement2D)
{
IfcAxis2Placement2D pos2D = (IfcAxis2Placement2D)pos;
if (pos2D.RefDirection != null)
{
xAxis = new Vector3D(pos2D.RefDirection.DirectionRatioX, pos2D.RefDirection.DirectionRatioY, pos2D.RefDirection.DirectionRatioZ);
}
else
{
xAxis = new Vector3D(1, 0, 0);
}
yAxis = Vector3D.Cross(Plane.XY.AxisZ, xAxis);
}
else if (pos is IfcAxis2Placement3D)
{
IfcAxis2Placement3D pos3D = (IfcAxis2Placement3D)pos;
if (pos3D.RefDirection != null)
{
xAxis = new Vector3D(pos3D.RefDirection.DirectionRatioX, pos3D.RefDirection.DirectionRatioY, pos3D.RefDirection.DirectionRatioZ);
}
else
{
xAxis = new Vector3D(1, 0, 0);
}
if (pos3D.Axis != null)
{
zAxis = new Vector3D(pos3D.Axis.DirectionRatioX, pos3D.Axis.DirectionRatioY, pos3D.Axis.DirectionRatioZ);
}
else
{
zAxis = new Vector3D(0, 0, 1);
}
if (xAxis.IsZero) //rivedere
{
xAxis = new Vector3D(1, 0, 0);
}
yAxis = Vector3D.Cross(zAxis, xAxis);
}
return(new Plane(org, xAxis, yAxis));
}
/// <summary>
/// Converts a placement to a Matrix3D
/// </summary>
/// <param name="placement"></param>
/// <returns></returns>
public static XbimMatrix3D ToMatrix3D(this IfcPlacement placement)
{
IfcAxis2Placement3D ax3 = placement as IfcAxis2Placement3D;
IfcAxis2Placement2D ax2 = placement as IfcAxis2Placement2D;
if (ax3 != null)
{
return(ax3.ToMatrix3D());
}
else if (ax2 != null)
{
return(ax2.ToMatrix3D());
}
else
{
return(XbimMatrix3D.Identity);
}
}
