def drawnObject(points,mode='point'):
"""Return the geometric object resulting from draw2D points"""
minor = None
if '_' in mode:
mode,minor = mode.split('_')
closed = minor=='closed'
if mode == 'point':
return points
elif mode == 'polyline':
return PolyLine(points,closed=closed)
elif mode == 'curve' and points.ncoords() > 1:
curl = obj_params.get('curl',None)
closed = obj_params.get('closed',None)
return BezierSpline(points,curl=curl,closed=closed)
elif mode == 'nurbs':
degree = obj_params.get('degree',None)
if points.ncoords() <= degree:
return None
closed = obj_params.get('closed',None)
return NurbsCurve(points,degree=degree,closed=closed)
elif mode == 'circle' and points.ncoords() % 3 == 0:
R,C,N = triangleCircumCircle(points.reshape(-1,3,3))
circles = [circle(r=r,c=c,n=n) for r,c,n in zip(R,C,N)]
if len(circles) == 1:
return circles[0]
else:
return circles
else:
return None
def __init__(self,coords):
"""Create a circular arc.
The arc is specified by 3 non-colinear points.
"""
self.coords = Coords(coords)
self.nparts = 1
self.closed = False
if self.coords.shape != (3,3):
raise ValueError,"Expected 3 points"
r,C,n = triangleCircumCircle(self.coords.reshape(-1,3,3))
self.radius,self.center,self.normal = r[0],C[0],n[0]
self.angles = vectorPairAngle(Coords([1.,0.,0.]),self.coords-self.center)
print("Radius %s, Center %s, Normal %s" % (self.radius,self.center,self.normal))
print("ANGLES=%s" % (self.angles))
