def tangent(self,u,v, recurse=False):
dU, dV = gp_Dir(), gp_Dir()
curv = self.curvature(u,v)
if curv.IsCurvatureDefined():
curv.TangentU(dU), curv.TangentV(dV)
return dU, dV
else:
# most likely the curvature is just out of bounds...
# move it a little close to the center of the surface...
tol = 1e-2
print 'trying to fix shit...'
domain = self.instance.domain()
if u in domain:
uorv = 'u'
elif v in domain:
uorv = 'v'
else:
raise ValueError('no curvature defined while sample does not lie on border...')
if uorv is not None:
indx = domain.index(u) if uorv == 'u' else domain.index(v)
if indx in (1,3): # v
v = v + tol if indx == 1 else v - tol
else:
u = u + tol if indx == 0 else u - tol
print 'hopefully fixed it?'
if not recurse:
self.tangent(u,v, True)
else:
return None
def DisplayVector(self, vec, pnt, update=False):
if self._inited:
aPresentation = Prs3d.Prs3d_Presentation(self._struc_mgr)
arrow = Prs3d_Arrow()
arrow.Draw(aPresentation.GetHandle(),
(pnt.as_vec() + vec).as_pnt(), gp_Dir(vec),
math.radians(20), vec.Magnitude())
aPresentation.Display()
# it would be more coherent if a AIS_InteractiveObject would be returned
if update:
self.Repaint()
return aPresentation
def DisplayVector(self, vec, pnt, update=False):
if self._inited:
aPresentation = Prs3d.Prs3d_Presentation(self._struc_mgr)
arrow = Prs3d_Arrow()
arrow.Draw(
aPresentation.GetHandle(),
(pnt.as_vec() + vec).as_pnt(),
gp_Dir(vec),
math.radians(20),
vec.Magnitude()
)
aPresentation.Display()
# it would be more coherent if a AIS_InteractiveObject would be returned
if update:
self.Repaint()
return aPresentation
