DRAW-POINT 2
NAME
Point -
coordinate position
SYNOPSIS
.EX
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.
10 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)