def _collides(x1, y1, x2, y2, x3, y3, x4, y4):
i = Geometry.intersect_seg(x1, y1, x2, y2, x3, y3, x4, y4)
if i is not None:
if y2 == y1:
n = 0 + math.pi / 2.0
else:
n = math.atan((x2 - x1) / (y2 - y1)) + math.pi / 2.0
if y4 == y3:
i1 = 0 - n
else:
i1 = math.atan((x4 - x3) / (y4 - y3)) - n
# i1 = math.pi / 2 - Geometry.angle(x1, y1, x2, y2, x3, y3, x4, y4)
if self.indice == p.last_indice:
n1 = self.indice
n2 = p.last_indice
else:
n1 = p.last_indice
n2 = self.indice
sini2 = math.sin(i1) * n1 / n2
if math.fabs(sini2) <= 1:
i2 = math.asin(sini2)
# print i2 / math.pi * 360
c = math.cos(-i1 + math.pi + i2)
s = math.sin(-i1 + math.pi + i2)
vx = p.vx * c - p.vy * s
vy = p.vx * s + p.vy * c
p.vx = vx
p.vy = vy
print 180 * i1 / math.pi, 180 * i2 / math.pi
if not p in self.inside:
self.inside[p] = True
else:
self.inside[p] = not self.inside[p]
if not self.inside[p]:
p.last_indice = self.indice
else:
# print 'coucou'
c = math.cos(-2 * i1)
s = math.sin(-2 * i1)
vx = p.vx * c - p.vy * s
vy = p.vx * s + p.vy * c
# p.vx = vx
# p.vy = vy
return True
return False
def collides(self,p):
#if Geometry.intersec_seg(self,{'x':p}):
#try:
# if Geometry.intersect(self.x1,self.y1,self.x2,self.y2,p.x,p.y,p.old_x,p.old_y):
# p.kill()
#except ZeroDivisionError:
# pass
i = Geometry.intersect_seg(self.x1,self.y1,self.x2,self.y2,p.x,p.y,p.old_x,p.old_y)
#if i is not None: p.kill()
#if i is not None: p.engine.rem_part(p)
if i is not None:
if self.is_a_barrier:
p.kill()
else:
#print "Mirror intersection!! ", p.id
# ix,iy = i
# p.x = ix
# p.y = iy
# p.x = p.old_x
# p.y = p.old_y
p.x = (i[0]*9+p.old_x)/10.0
p.y = (i[1]*9+p.old_y)/10.0
p.vx, p.vy = Geometry.reflect(self.x2-self.x1, self.y2-self.y1, p.vx, p.vy)