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from __future__ import print_function
import math
import operator
from singleton_store import Store
bs = [b for b in App.paper.selected if b.object_type == "bond"]
if not len(bs) == 2:
Store.log(_("You have to have 2 bonds selected"), message_type="hint")
else:
b1, b2 = bs
center = set(b1.vertices) & set(b2.vertices)
if center:
a11 = center.pop()
a12 = b1.atom1 == a11 and b1.atom2 or b1.atom1
a22 = b2.atom1 == a11 and b2.atom2 or b2.atom1
v1 = (a12.x - a11.x, a12.y - a11.y, a12.z - a11.z)
v2 = (a22.x - a11.x, a22.y - a11.y, a22.z - a11.z)
print(v1, v2)
else:
v1 = (b1.atom1.x - b1.atom2.x, b1.atom1.y - b1.atom2.y, b1.atom1.z - b1.atom2.z)
v2 = (b2.atom1.x - b2.atom2.x, b2.atom1.y - b2.atom2.y, b2.atom1.z - b2.atom2.z)
dot = sum(map(operator.mul, v1, v2))
dv1 = math.sqrt(sum(x**2 for x in v1))
dv2 = math.sqrt(sum(x**2 for x in v2))
cos_a = dot / dv1 / dv2
ret = math.acos(cos_a)
print(cos_a)
res = "%.2f" % (180*ret/math.pi)
# draw the result
x = (b1.atom1.x + b1.atom2.x + b2.atom1.x + b2.atom2.x) / 4
y = (b1.atom1.y + b1.atom2.y + b2.atom1.y + b2.atom2.y) / 4
App.paper.new_text(x, y, text=res).draw()
Store.log(res)
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