class Edge(object):
"""
connects any two points
"""
#tuple of points, and the instance index to which the edge is rooted
points = (None, None)
transforms = ((0,0), (0,0)) #transform relative to root domain, which define the root edge
curve = None #subdivision curve; this should really be here. controlpoints are part of datamodel. cmputation and caching should be handled by the editor
color = (0,0,0) #for giggles
boundary = True
driving = True #driving edges enforce their radius on the relief
width = 0.01 #smoothing width to apply to get stencil
def __init__(self, points, transforms = ((0,0), (0,0))):
self.points = points
self.transforms = transforms
self.curve = Curve(self)
def basis(self):
"""return start, end and orientation vectors for each edge"""
L, R = [p.instantiate_offset(self.group.permute_forward(p.transform, t))
for p,t in zip(self.points, self.transforms)]
o = np.array([+1,-1])[:len(L)]
S = np.cross(L, R) * o[:, None, None]
return L, R, S
def instantiate(self):
""""returns actual curve data by subdivision?"""
#this is a hack... find better way to propagate point radii
self.curve.radius[0] = self.points[1].radius
self.curve.radius[-1] = self.points[0].radius
return self.curve.curve()
def instantiate_cp(self):
""""returns actual curve data by subdivision?"""
#this is a hack...
self.curve.radius[0] = self.points[1].radius
self.curve.radius[-1] = self.points[0].radius
return self.curve.controlpoints()
@property
def group(self):
return self.points[0].group
@property
def datamodel(self):
return self.points[0].datamodel
def __init__(self, points, transforms = ((0,0), (0,0))):
self.points = points
self.transforms = transforms
self.curve = Curve(self)