'**SUMMARY**
Get the ROI as a list of four points that make up the bounding rectangle.
**RETURNS**
A list of the form [(x,y),(x,y),(x,y),(x,y)]
**EXAMPLE**
>>> roi = ROI(10,10,100,100,img)
>>> print roi.toPoints()'

def toPoints(self):

    tl = (self.xtl, self.ytl)
    tr = ((self.xtl + self.w), self.ytl)
    br = ((self.xtl + self.w), (self.ytl + self.h))
    bl = (self.xtl, (self.ytl + self.h))
    return [tl, tr, br, bl]
