Ralackk: Please check this thread on the dosbox forums.
http://vogons.zetafleet.com/viewtopic.php?t=18186 How do you use the software ? Can someone explain it to me please ?
Or maybe someone finally found a solution to this ?
Edit : Of course I'm talking about Constructor here.
And I found this :
http://www.vogons.org/viewtopic.php?f=33&t=31938 Where people suggest to reduce polling rate of your mouse.
Since I can't (I can't find the option for my mouse), I looked a bit more, and they say that increasing sensitivity of mouse in dosbox reduce the issue. So I changed dosbox mouse sensitivity to 200 (like suggested in the post above by alawadhi3000) and I reduce my windows mouse sensitivity the time I play : seems to fix things. I'll tell after some plays if it's convincing.
I found this too :
https://www.gog.com/forum/constructor_series/mouse_poor_precision Where someone said "It went better using 1024x768 as output resolution".
Hope this will help some, and if you have a solution, I would hear it with interest :)
Edit 2 : So finally, the
best solution seems to be this one :
Ralackk: Please check this thread on the dosbox forums.
http://vogons.zetafleet.com/viewtopic.php?t=18186 For people like me who could be a little lost at first, I'll make a step by step instruction, with the hope it could help some others :)
I'll suggest my own current settings, but of course you can try your own !
1) Download "MOUSEX.ZIP" on the vogons link.
2) Unzip its content ("MOUSEX.EXE" & "MOUSEX.C") directly into the folder "C:\GOG Games\Constructor"
3) Make a backup of the file "dosboxConstructor.conf"
4) Open the original and modify the sensitivity value : put "sensitivity=100" [it's the mouse sensitivity/speed in dosbox]
5) I personally have this settings that I'm not sure GOG put by default (not sure it helps solving, I indicate this just in case) :
fullresolution=desktop
output=openglnb
6) Save and close the file
7) Make a backup of the file "dosboxConstructor_single.conf"
8) Open the original
9) See the line "game.exe" ? We will change it, thanks to instructions given on the vogons page. Instead of the original "game.exe", here is what I put instead "MOUSEX 180 100 game.exe". If I understand well, it launch game.exe with mousex and its parameters indicated here. Mousex modify X and Y speed of the mouse. If a value is set to 100, it means that speed of mouse = 100% = unaltered. So I increased horizontal speed to 180% of initial mouse speed, and let the vertical one at the same speed. I'm using this command line formula : "MOUSEX xspeed yspeed filename.exe". Remember that this settings must be thought in relation to the dosbox mouse sensitivity setting and you need to balance them all (but like I said, you can try to put your own ;)). Higher dosbox sensitivity should mean putting lower values for MOUSEX (and vice-versa).
10) Save the file
11) Launch the game. Now the mouse speed should be more the same, vertically and horizontally.
Note : With my settings the mouse is a bit fast, but if I lower it, I feel it loose precision to click.
Hope this will help other people like me who were a bit lost !
And a huge thanks to the people who created & shared this application ! :D