- plane (Point, Point, Point): Plane
         
 
         Creates a plane through three points. 
        
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         - plane (a: Real, b: Real,
         c: Real, d: Length): Plane
         
 
         Creates a plane from its equation aX+bY+cZ=d. 
        
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         - plane (Line, Line): Plane 
 
         Creates a plane through two lines. 
        
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         - plane (Point, Line): Plane 
 
         Creates a plane through a point and a line. 
        
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         - plane (Curve): Plane 
 
         Creates a plane through a planar curve. 
        
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         - planetangent (Surface, Point): Plane
 
         Creates a plane tangent to a surface at a given point. 
        
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         - planenormal (Curve, Point): Plane
 
         Creates a plane normal to a curve at a given point. 
        
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         - planeoffset (Plane, offset: Length, orientation:
         Boolean): Plane
 
         Creates an offset plane from another at a given distance. Set the 
         boolean orientation to false to change the side of the created plane 
         regarding the reference plane. 
        
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         - planeoffset (Plane, Point): Plane
 
         Creates an offset plane from another passing through a point. 
        
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         - planeangle (pln: Plane, axis: Line, angle: 
         Angle, orientation: Boolean): Plane 
 
         Creates an angle plane. Set the boolean orientation to false to change 
         the side of the created plane regarding the reference plane. 
        
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         - planemean (Point,...): Point
 
         Computes a mean plane from a set of points. 
        
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