def route_with_lines(e,pts):
assert hasattr(e,'view')
tail_pos = intersectR(e.v[0].view,topt=pts[1])
head_pos = intersectR(e.v[1].view,topt=pts[-2])
pts[0] = tail_pos
pts[-1] = head_pos
e.view.head_angle = getangle(pts[-2],pts[-1])
def route_with_lines(e, pts):
assert hasattr(e, "view")
tail_pos = intersectR(e.v[0].view, topt=pts[1])
head_pos = intersectR(e.v[1].view, topt=pts[-2])
pts[0] = tail_pos
pts[-1] = head_pos
e.view.head_angle = getangle(pts[-2], pts[-1])
def _gen_point(p1, p2, new_distance):
from grandalf.utils.geometry import new_point_at_distance
initial_distance = distance = sqrt((p2[0] - p1[0]) ** 2 + (p2[1] - p1[1]) ** 2)
if initial_distance < 1e-10:
return None
if distance > new_distance:
distance = distance - new_distance
else:
return None
angle = getangle(p1, p2)
new = new_point_at_distance(p1, distance, angle)
return new
def _gen_point(p1, p2, new_distance):
from grandalf.utils.geometry import new_point_at_distance
initial_distance = distance = sqrt((p2[0] - p1[0])**2 + (p2[1] - p1[1])**2)
if initial_distance < 1e-10:
return None
if distance > new_distance:
distance = distance - new_distance
else:
return None
angle = getangle(p1, p2)
new = new_point_at_distance(p1, distance, angle)
return new
def route_with_lines(e,pts):
assert hasattr(e,'view')
try:
tail_pos = intersectR(e.v[0].view, topt=pts[1])
except ValueError:
# TODO: Create a test case to reproduce it and submit upstream.
tail_pos = pts[1]
try:
head_pos = intersectR(e.v[1].view, topt=pts[-2])
except ValueError:
# TODO: Create a test case to reproduce it and submit upstream.
head_pos = pts[-2]
pts[0] = tail_pos
pts[-1] = head_pos
e.view.head_angle = getangle(pts[-2],pts[-1])
def _route_edges(edge, points):
"""
A simple edge routing algorithm.
:param edge:
:param points:
:return:
"""
# compute new beginning and ending
src = edge.v[0].view
src_width, src_height, (src_x, src_y) = src.w, src.h, src.xy
dst = edge.v[1].view
dst_width, dst_height, (dst_x, dst_y) = dst.w, dst.h, dst.xy
start_point = (src_x, src_y + src_height / 2)
end_point = (dst_x, dst_y - dst_height / 2)
points[-1] = start_point
points[0] = end_point
edge.view.head_angle = getangle(points[-2], points[-1])
