rotation foncitonne jusque 180 deg

srcs/fdf.c

@@ -27,15 +27,15 @@ void	draw_lines(t_fdf *fdf, int *start, int *end)
 		i = 0;
 		j = 0;
 		z = start[2];
-		while (i <= dx && j <= dy)
+		while (ft_abs(i) <= ft_abs(dx) && ft_abs(j) <= ft_abs(dy))
 		{
 			if ((dx + dy) && (i + j))
 				z = start[2] + (end[2] - start[2]) * (i + j) / (dx + dy);
 			draw_color_pixel(fdf, start[0] + i, start[1] + j, z);
 			if (!dx || j < i * dy / dx)
-				j++;
+				j += ft_sign(dy);
 			else
-				i++;
+				i += ft_sign(dx);
 		}
 	}
 }