Batch Loading screen with no Glitching/Lag - batch-file

Question

Here is a bit of my batch Loading script
Echo Loading
Echo ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»
Echo ºÛ º
Echo ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ
ping localhost -n 2 > nul
cls
Echo Loading
Echo ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»
Echo ºÛÛ º
Echo ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ
ping localhost -n 2 > nul
cls
Echo Loading
Echo ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»
Echo ºÛÛÛ º
Echo ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ
exit
Using the cls code to wipe the screen makes the screen look like a "Blink". Is there a better way to clear the screen for this batch file? TIA

Answer 1

Just far from perfect less glitching option: Instead of repaint the full screen, repaint only the loading line (but this has to be last painted line in the screen).
The basic idea is to ouput the line ending with a carriage return but without a line feed so the cursor is moved to the start of the line to write again over the same line.
#echo off
setlocal enableextensions enabledelayedexpansion
Rem Get a carriage return character
set "CR=" & for /f %%a in ('copy /Z "%~f0" nul') do if not defined CR set "CR=%%a"
rem The progress bar
set "fill=[##########]"
cls
echo(:: computers were created to give humans time to think while waiting ....
rem For each character in the fill
for /l %%a in (2 1 11) do (
rem Calculate the right part of the bar
set "spaces=!fill:~%%a!"
rem Output the left and right parts of the bar and carriage return
<nul set/p ".=:: Loading something big !fill:~0,%%a!!spaces:#= !!CR!"
rem Pause for a second
ping -n 2 "" > nul
)
echo(
echo(:: Done
If you can not change your code/design so the last line is the only one repainted, at least try to enclose the painting operation inside a block (code enclosed in parenthesis) so in each paint operation commands are only parsed once, and prepare everything before starting to paint. It will not avoid the glitches, but will be less evident
#echo off
setlocal enableextensions enabledelayedexpansion
for /l %%a in (0 10 100) do (
call :loadingScreen %%a
>nul ping -n 2 ""
)
echo(:: Done
goto :eof
:loadingScreen percent
setlocal enableextensions enabledelayedexpansion
rem Prepare everything
set "sb=+----------+"
set "fill=^|##########^|"
set "eb=+----------+"
set /a "chars=2+%~1/10"
set "spaces=!fill:~%chars%!"
set "loadBar=!fill:~0,%chars%!!spaces:#= !"
rem Time to paint
( cls
echo(:: computers were created to give humans time to think while waiting .... %time%
echo(
echo( %sb%
echo( Loading something big %loadBar%
echo( %eb%
echo(
)
goto :eof