GIL - 座標演算 (point2) - lab.comp@wiki

2次元座標の演算

ソース

#include <iostream>
#include <string>
#include <boost/format.hpp>
#include <boost/gil/utilities.hpp>
using namespace std;
using namespace boost;
using namespace boost::gil;

string show( string expression, point2<int> p )
{
    return str( format( "%s = (%3d, %3d)" ) % expression % p.x % p[1] );
}

int main()
{
    point2<int> p1( 10, 100 );
    point2<int> p2;

    p2.x = 20;
    p2.y = 200;

    cout << "num_dimensions = " << p1.num_dimensions << endl;
    cout << show( "p1", p1 ) << endl;
    cout << show( "p2", p2 ) << endl;
    cout << show( "p1 + p2", p1 + p2 ) << endl;
    cout << show( "p1 - p2", p1 - p2 ) << endl;
}

実行結果

num_dimensions = 2
p1 = ( 10, 100)
p2 = ( 20, 200)
p1 + p2 = ( 30, 300)
p1 - p2 = (-10, -100)