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Number of spirals turning right:
Number of spiral turning left:
Angle between the first right and left spirals on the center circle :
Geometry :
Positive curvature (sphere)
Flat (Euclidian)
Negative Curvature (tractricoid)
Space radius
Size parameter
:
Drawing extends: Center circle radius : 1 External circle radius
(<pi*Space radius)
(<Size parameter)
:
Drawing shifts (Filling is done by drawing quadrilaters between a right spiral and the previous one, shifts tells which crossings are used to do that, when the number of right and left spirals are different, one may have to adjust the shifts...):
Right spiral colors :
Center :
Border :