This constructor uses pointer1-pointer3 as the first three points for the solid and then uses pointer2 as the fourth point as well. All points must be in WCS coordinates. The normal vector is initialized to (0,0,1) and the thickness is set to 0.0.

Public Sub New(
    pointer1 As Point3d, 
    pointer2 As Point3d, 
    pointer3 As Point3d
)

public Solid(
    Point3d pointer1, 
    Point3d pointer2, 
    Point3d pointer3
);