Rectangle4i.java

package codechicken.lib.vec;

public class Rectangle4i {
    public int x;
    public int y;
    public int w;
    public int h;

    public Rectangle4i() {
    }

    public Rectangle4i(int x, int y, int w, int h) {
        this.x = x;
        this.y = y;
        this.w = w;
        this.h = h;
    }

    public int x1() {
        return x;
    }

    public int y1() {
        return y;
    }

    public int x2() {
        return x + w - 1;
    }

    public int y2() {
        return y + h - 1;
    }

    public void set(int x, int y, int w, int h) {
        this.x = x;
        this.y = y;
        this.w = w;
        this.h = h;
    }

    public Rectangle4i offset(int dx, int dy) {
        x += dx;
        y += dy;
        return this;
    }

    public Rectangle4i include(int px, int py) {
        if (px < x) {
            expand(px - x, 0);
        }
        if (px >= x + w) {
            expand(px - x - w + 1, 0);
        }
        if (py < y) {
            expand(0, py - y);
        }
        if (py >= y + h) {
            expand(0, py - y - h + 1);
        }
        return this;
    }

    public Rectangle4i include(Rectangle4i r) {
        include(r.x, r.y);
        return include(r.x2(), r.y2());
    }

    public Rectangle4i expand(int px, int py) {
        if (px > 0) {
            w += px;
        } else {
            x += px;
            w -= px;
        }
        if (py > 0) {
            h += py;
        } else {
            y += py;
            h -= py;
        }
        return this;
    }

    public boolean contains(int px, int py) {
        return x <= px && px < x + w && y <= py && py < y + h;
    }

    public boolean intersects(Rectangle4i r) {
        return r.x + r.w > x &&
                r.x < x + w &&
                r.y + r.h > y &&
                r.y < y + h;
    }

    public int area() {
        return w * h;
    }
}