rect

Package rect implements rectangles and can determine when rectangles intersect, are contained, and when rectangles lie adjacent

usage

in cmd/recty/main.go is an example of how one could use this package.

r := rect.Rectangle{     
    P1: rect.Point{1, 1},
    P2: rect.Point{1, 2},
    P3: rect.Point{2, 1},
    P4: rect.Point{2, 2},
}                        

defines a rectangle.

fmt.Println(r.IsRect())

would varify that the rectangle provided is a valid rectangle.

r1 := rect.Rectangle{     
    P1: rect.Point{1, 1},
    P2: rect.Point{1, 2},
    P3: rect.Point{2, 1},
    P4: rect.Point{2, 2},
}                        
r2 := rect.Rectangle{     
    P1: rect.Point{1, 1},
    P2: rect.Point{1, 2},
    P3: rect.Point{2, 1},
    P4: rect.Point{2, 2},
}                        

fmt.Println(rect.Intersection(r1, r2))

Running the above code would print out all intersection points of the two rectangles.

r3 := rect.Rectangle{     
    P1: rect.Point{0, 0},
    P2: rect.Point{0, 3},
    P3: rect.Point{3, 0},
    P4: rect.Point{3, 3},
}                        
r4 := rect.Rectangle{     
    P1: rect.Point{2, 2},
    P2: rect.Point{2, 3},
    P3: rect.Point{3, 2},
    P4: rect.Point{3, 3},
}                        

fmt.Println(rect.Adjacency(r3, r4))

This would return a boolean for whether r3 and r4 have an adjacent side.

r5 := rect.Rectangle{     
    P1: rect.Point{0, 0},
    P2: rect.Point{0, 3},
    P3: rect.Point{3, 0},
    P4: rect.Point{3, 3},
}                        
r6 := rect.Rectangle{     
    P1: rect.Point{1, 1},
    P2: rect.Point{1, 2},
    P3: rect.Point{2, 1},
    P4: rect.Point{2, 2},
}                        

fmt.Println(rect.Containment(r5, r6))

And finally, running rect.Containment(r5, r6) would return true because r6 is contained inside of r5