An Arc or Circle is another important entity in Computational Geometry. A circle is set of infinite points at equal distance from a given point. This point is called as Centre of the circle and the distance between Centre and any point is called as radius of the circle.
Computational Geometry Library in Python – Arc/Circle:
class CGLibPy_Arc(object):
centrePt = None
startPt = None
endPt = None
radius = 0.0
startAng = 0.0
endAng = 0.0
sweepAng = 0.0
fullCircle = False
CCW = True
def __init__(self,_args):
if len(_args) == 3: #Circle - Centre, radius, Orientation
self.centrePt = _args[0]
self.radius = _args[1]
self.CCW = _args[2]
self.fullCircle = True
elif len(_args) == 5: #Arc - Centre, Start Pt, End Pt, radius, Orientation
self.centrePt = _args[0]
self.startPt = _args[1]
self.endPt = _args[2]
self.radius = _args[3]
self.CCW = _args[4]
An arc is nothing but a subset of a Full Circle. Any Arc or Circle has two directions either Clockwise (CW) or Counter Clockwise (CCW)
An Arc is defined by a Centre, Radius a Start Point and an End Point. The angle between Start Point and End Point is called Sweep Angle.
