from MyLine  import *
from MyPoint import *
import string

class MyWalls:
    def __init__(self):
        self.walls = []
        for line in open('MyWalls.dat','r').readlines():
            myline = MyLine()
            cols = string.split(line)
            myline.a.x = float(cols[0])
            myline.a.y = float(cols[1])
            myline.b.x = float(cols[2])
            myline.b.y = float(cols[3])
            self.walls.append(myline)
    
    def printit(self):
        for i in range(len(self.walls)):
            print '%2d %6.2f %6.2f %6.2f %6.2f' % (i, self.walls[i].a.x, self.walls[i].a.y, self.walls[i].b.x, self.walls[i].b.y)

    def findthewall(self, lookline, loc):
        mindist = 1000
        minwall = -1
        for i in range(len(self.walls)):
		apoint = self.walls[i].intersect(lookline)
		if self.walls[i].intersecterror != -1:
			ontheline = self.walls[i].pointonline(apoint) and lookline.pointonline(apoint)
			print 'i=%2d x=%15.3f y=%15.3f ontheline=%2d' % (i,apoint.x,apoint.y,ontheline),
			if ontheline == 1:
			  dist = apoint.distance(loc)
			  print ", dist=%9.3f" % (dist)
			  if mindist > dist:
			      mindist = dist
			      minwall = i
			else:
				print
    	print "Wall #",minwall," dist to wall=",mindist        
    	return minwall