array of u points (GRID_WIDTH)
array of v points (GRID_HEIGHT)
for j = 0 j < GRID_WIDTH j++
	for i = 0 i < GRID_HEIGHT i++
		upoints[i] = ControlPoints[j][i]
	vpoints[j] = evaluateBezierCurve(v, upoints, GRID_HEIGHT)
	
return evaluateBezierCurve(u, vpoints, GRID_WIDTH)