DRAW-POINT(2)                                       DRAW-POINT(2)

     NAME
          Point - coordinate position

     SYNOPSIS
          include    "draw.m";
          draw := load Draw Draw->PATH;

          Point: adt
          {
              x:    int;
              y:    int;

              add:  fn(p: self Point, q: Point):  Point;
              sub:  fn(p: self Point, q: Point):  Point;
              mul:  fn(p: self Point, i: int):    Point;
              div:  fn(p: self Point, i: int):    Point;
              eq:   fn(p: self Point, q: Point):  int;
              in:   fn(p: self Point, r: Rect):   int;
          };

     DESCRIPTION
          The Point data type specifies a position in the integer
          grid.

          x, y      The coordinate position. The coordinates increase
                    to the right (x) and down (y).

          p.add(q)  Returns the point (p.x+q.x, p.y+q.y).

          p.sub(q)  Returns the point (p.x-q.x, p.y-q.y).

          p.mul(i)  Returns the point (p.x*i, p.y*i).

          p.div(i)  Returns the point (p.x/i, p.y/i).

          p.eq(q)   Returns non-zero if the points' coordinates are
                    equal and zero otherwise.

          p.in(r)   Returns non-zero if point p lies within rectangle
                    r and zero otherwise.

     SEE ALSO
          draw-intro(2), draw-rect(2)

     Page 1                       Plan 9             (printed 9/20/21)