5 // Created by Pieter de Bie on 27-08-08.
6 // Copyright 2008 __MyCompanyName__. All rights reserved.
12 @implementation PBLine
13 @synthesize upper, from, to;
14 - (id)initWithUpper: (int) u From: (int) f to: (int) t;
23 + (PBLine*) lowerLineFrom:(int) f to: (int) t
25 return [[PBLine alloc] initWithUpper:0 From:f to:t];
28 + (PBLine*) upperLineFrom:(int) f to: (int) t
30 return [[PBLine alloc] initWithUpper:1 From:f to:t];