added aiming to bullet type 2

pyshoot.py

@@ -8,7 +8,7 @@ import pygame
 from pygame.locals import *
 import os
 import random
-
+from math import sqrt,pow,ceil,floor
 
 # constants
 SCREEN_X = 640
@@ -248,13 +248,24 @@ class Enemy(Object):
 	def aim_player(self):
 		""" compute speed vector to aim at current player position """
 		# get player position
+		localspeed = 5
+
 		player_pos = globals.player.rect
 		direction = (player_pos[0] - self.rect[0], player_pos[1] - self.rect[1])
-		# norm = 
+		norm = sqrt(pow(direction[0], 2) + pow(direction[1], 2))
+		speed = (direction[0] / norm, direction[1] / norm)
+		speed2 = (ceil(speed[0] * localspeed), floor(speed[1]) * localspeed)
+		print "direction: " + str(direction)
+		print "norm: " + str(norm)
+		print "speed: " + str(speed)
+		print "speed2: " + str(speed2)
+		print
+		return speed2
 
 	def aim(self):
 		""" set bullet speed """
-		return (-10, 0)
+		return self.aim_player()
+		# return (-10, 0)
 
 	
 	def die(self):