test/dim_test.cc
author Peter Kovacs <kpeter@inf.elte.hu>
Fri, 03 Apr 2009 18:59:15 +0200
changeset 608 6ac5d9ae1d3d
parent 253 dbe309b5e855
permissions -rw-r--r--
Support real types + numerical stability fix in NS (#254)

- Real types are supported by appropriate inicialization.
- A feature of the XTI spanning tree structure is removed to ensure
numerical stability (could cause problems using integer types).
The node potentials are updated always on the lower subtree,
in order to prevent overflow problems.
The former method isn't notably faster during to our tests.
     1 /* -*- mode: C++; indent-tabs-mode: nil; -*-
     2  *
     3  * This file is a part of LEMON, a generic C++ optimization library.
     4  *
     5  * Copyright (C) 2003-2009
     6  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
     7  * (Egervary Research Group on Combinatorial Optimization, EGRES).
     8  *
     9  * Permission to use, modify and distribute this software is granted
    10  * provided that this copyright notice appears in all copies. For
    11  * precise terms see the accompanying LICENSE file.
    12  *
    13  * This software is provided "AS IS" with no warranty of any kind,
    14  * express or implied, and with no claim as to its suitability for any
    15  * purpose.
    16  *
    17  */
    18 
    19 #include <lemon/dim2.h>
    20 #include <iostream>
    21 #include "test_tools.h"
    22 
    23 using namespace std;
    24 using namespace lemon;
    25 
    26 int main()
    27 {
    28   typedef dim2::Point<int> Point;
    29 
    30   Point p;
    31   check(p.size()==2, "Wrong dim2::Point initialization.");
    32 
    33   Point a(1,2);
    34   Point b(3,4);
    35   check(a[0]==1 && a[1]==2, "Wrong dim2::Point initialization.");
    36 
    37   p = a+b;
    38   check(p.x==4 && p.y==6, "Wrong dim2::Point addition.");
    39 
    40   p = a-b;
    41   check(p.x==-2 && p.y==-2, "Wrong dim2::Point subtraction.");
    42 
    43   check(a.normSquare()==5,"Wrong dim2::Point norm calculation.");
    44   check(a*b==11, "Wrong dim2::Point scalar product.");
    45 
    46   int l=2;
    47   p = a*l;
    48   check(p.x==2 && p.y==4, "Wrong dim2::Point multiplication by a scalar.");
    49 
    50   p = b/l;
    51   check(p.x==1 && p.y==2, "Wrong dim2::Point division by a scalar.");
    52 
    53   typedef dim2::Box<int> Box;
    54   Box box1;
    55   check(box1.empty(), "Wrong empty() in dim2::Box.");
    56 
    57   box1.add(a);
    58   check(!box1.empty(), "Wrong empty() in dim2::Box.");
    59   box1.add(b);
    60 
    61   check(box1.left()==1 && box1.bottom()==2 &&
    62         box1.right()==3 && box1.top()==4,
    63         "Wrong addition of points to dim2::Box.");
    64 
    65   check(box1.inside(Point(2,3)), "Wrong inside() in dim2::Box.");
    66   check(box1.inside(Point(1,3)), "Wrong inside() in dim2::Box.");
    67   check(!box1.inside(Point(0,3)), "Wrong inside() in dim2::Box.");
    68 
    69   Box box2(Point(2,2));
    70   check(!box2.empty(), "Wrong empty() in dim2::Box.");
    71 
    72   box2.bottomLeft(Point(2,0));
    73   box2.topRight(Point(5,3));
    74   Box box3 = box1 & box2;
    75   check(!box3.empty() &&
    76         box3.left()==2 && box3.bottom()==2 &&
    77         box3.right()==3 && box3.top()==3,
    78         "Wrong intersection of two dim2::Box objects.");
    79 
    80   box1.add(box2);
    81   check(!box1.empty() &&
    82         box1.left()==1 && box1.bottom()==0 &&
    83         box1.right()==5 && box1.top()==4,
    84         "Wrong addition of two dim2::Box objects.");
    85 
    86   return 0;
    87 }