1. A method comprising: determining positional coordinates for each of a plurality of vertex points that lie on a curve to be rendered; computing a first slope between positional coordinates of a first vertex point and positional coordinates of a second vertex point; computing a second slope between the positional coordinates of the second vertex point and positional coordinates of a third vertex point; and discarding one of the first, second, and third vertex points when the first and second computed slopes are substantially the same.