main/src/georegression/geometry/UtilPolygons2D_F64.java
public static void bounding( Quadrilateral_F64 quad , Rectangle2D_F64 rectangle ) {

		rectangle.p0.x = Math.min(quad.a.x,quad.b.x);
		rectangle.p0.x = Math.min(rectangle.p0.x,quad.c.x);
		rectangle.p0.x = Math.min(rectangle.p0.x,quad.d.x);

		rectangle.p0.y = Math.min(quad.a.y,quad.b.y);
		rectangle.p0.y = Math.min(rectangle.p0.y,quad.c.y);
		rectangle.p0.y = Math.min(rectangle.p0.y,quad.d.y);

		rectangle.p1.x = Math.max(quad.a.x,quad.b.x);
		rectangle.p1.x = Math.max(rectangle.p1.x,quad.c.x);
		rectangle.p1.x = Math.max(rectangle.p1.x,quad.d.x);

		rectangle.p1.y = Math.max(quad.a.y,quad.b.y);
		rectangle.p1.y = Math.max(rectangle.p1.y,quad.c.y);
		rectangle.p1.y = Math.max(rectangle.p1.y,quad.d.y);
	}
public static void bounding( Quadrilateral_F64 quad , Rectangle2D_F64 rectangle ) {

		rectangle.p0.x = Math.min(quad.a.x,quad.b.x);
		rectangle.p0.x = Math.min(rectangle.p0.x,quad.c.x);
		rectangle.p0.x = Math.min(rectangle.p0.x,quad.d.x);

		rectangle.p0.y = Math.min(quad.a.y,quad.b.y);
		rectangle.p0.y = Math.min(rectangle.p0.y,quad.c.y);
		rectangle.p0.y = Math.min(rectangle.p0.y,quad.d.y);

		rectangle.p1.x = Math.max(quad.a.x,quad.b.x);
		rectangle.p1.x = Math.max(rectangle.p1.x,quad.c.x);
		rectangle.p1.x = Math.max(rectangle.p1.x,quad.d.x);

		rectangle.p1.y = Math.max(quad.a.y,quad.b.y);
		rectangle.p1.y = Math.max(rectangle.p1.y,quad.c.y);
		rectangle.p1.y = Math.max(rectangle.p1.y,quad.d.y);
	}
Finds the minimum area bounding rectangle around the quadrilateral.

@param quad (Input) Quadrilateral
@param rectangle (Output) Minimum area rectangle