Checking and updating value of decision parameter based on algorithm
if ( d1 < 0 ) : NEW_LINE INDENT x += 1 ; NEW_LINE dx = dx + ( 2 * ry * ry ) ; NEW_LINE d1 = d1 + dx + ( ry * ry ) ; NEW_LINE DEDENT else : NEW_LINE INDENT x += 1 ; NEW_LINE y -= 1 ; NEW_LINE dx = dx + ( 2 * ry * ry ) ; NEW_LINE dy = dy - ( 2 * rx * rx ) ; NEW_LINE d1 = d1 + dx - dy + ( ry * ry ) ; NEW_LINE DEDENT