def receives__look(self):
"""return heading of first object seen"""
# set up view poly
self.Ax = 0.0
self.Ay = 0.0
self.Bx = (self.sight_distance * math.cos(math.radians(self.rotation - 45.0)))
self.By = (self.sight_distance * math.sin(math.radians(self.rotation - 45.0)))
self.Cx = (self.sight_distance * math.cos(math.radians(self.rotation + 45.0)))
self.Cy = (self.sight_distance * math.sin(math.radians(self.rotation + 45.0)))
poly_x = [self.Ax, self.Bx, self.Cx]
poly_y = [self.Ay, self.By, self.Cy]
# for every inhabitant
for inhabitant in TheWorld.inhabitants:
if inhabitant == self:
continue
# get pos of inhabitant relative to fov unit square coords
Px = (inhabitant.x / self.width) - (self.x / self.width)
Py = (inhabitant.y / self.height) - (self.y / self.width)
if MathLib.polygon_test(Px, Py, poly_x, poly_y):
ret = 0.0
Dx = inhabitant.x - self.x
Dy = inhabitant.y - self.y
ret = math.degrees(math.atan2(Dy, Dx))
if ret < 0:
ret += 360.0
#print "I can see: ", inhabitant, "at", ret, "degrees"
return ret - self.rotation
