Point Clipping

/*
      Point Clipping Algorithm:

      1. Get the minimum and maximum coordinates of both viewing pane.
      2. Get the coordinates for a point.
      3. Check whether given input lies between minimum and maximum coordinate
         of viewing pane.
      4. If yes display the point which lies inside the region otherwise discard it.
*/


#include "bits/stdc++.h"
#include "graphics.h"

using namespace std;

struct Point
{
      int x;
      int y;
      Point(int x = 0, int y = 0)
            : x(x)
            , y(y) {}
};

void point_clipping(vector <Point> all_points, Point p1, Point p2)
{
      for (Point p : all_points)
      {
            if (p.x >= p1.x and p.x <= p2.x and p.y >= p1.y and p.y <= p2.y)
            {
                  putpixel(p.x, p.y, GREEN);
            }
      }
}

signed main()
{
      freopen("point_clipping_input.txt", "r", stdin);

      int num_points;
      cin >> num_points;
      vector <Point> all_points(num_points);
      for (Point &p : all_points) cin >> p.x >> p.y;
      Point p1, p2;
      cin >> p1.x >> p1.y >> p2.x >> p2.y;

      int gd = DETECT;
      int gm;
      detectgraph(&gd, &gm);
      initgraph(&gd, &gm, "");

      point_clipping(all_points, p1, p2);

      getch();
      closegraph();
}