Re: [hatari-devel] IKBD_Cmd_SetMouseScale in the game "The Sentinel"

[Nicolas Pomarède <npomarede@xxxxxxxxxxxx>]

On 26/05/2013 16:28, Eero Tamminen wrote:
> Hi,
>
> On sunnuntai 26 toukokuu 2013, Nicolas Pomarède wrote:
> > But you can check yourself, run : "hatari --trace ikbd_all 2>log"
> > then "grep IKBD log" to see how the program accesses the keyboard.
>
> TOS startup + Spectrum 512:
> -------
> $ grep IKBD ikbd.log | grep -v IKBD_Cmd_ReadAbsMousePos
> IKBD_Cmd_Reset VBLs=8 framecyc=72956
> IKBD_Cmd_RelMouseMode
> IKBD_Cmd_SetMouseThreshold 1,1
> IKBD_Cmd_SetYAxisUp
> IKBD_Cmd_MouseAction 0
> IKBD_Cmd_AbsMouseMode 638,398
> IKBD_Cmd_SetMouseScale 2,2
> IKBD_Cmd_SetYAxisUp
> IKBD_Cmd_MouseAction 0
> IKBD_Cmd_SetInternalMousePos 320,200
> -------
>
> And drawing program reads the mouse with ReadAbsMousePos().
>
> -> ikbd.diff fixes the mouse issue with it.

That's good news (I didn't check spectrum512 before).

> However, Spectrum 512 has also regressed, the color bands on the background
> go diagonally across the screen.  I think that would need to be fixed before
> release.

That's not an emulation issue. Spectrum 512 needs to be started in 60 
Hz, not 50 Hz (it doesn't change freq itself, I don't know why). You can 
try with a US or UK TOS that sets freq to 60 Hz.

I will update release note / compatibility files for these (I will 
commit it later to main source tree, I have pending changes to finish 
before)


> 	- Eero
>
> PS. Maybe Hextracker should use IKBD mouse scaling too,
> instead of (apparently) doing it manually?

I don't think so. You get much better control by getting relative mouse 
changes instead of absolute ones.
With rel changes, you can scale delta X/Y yourself if you want in your 
program, but you can also do more interesting effects, like adding 
acceleration to the mouse pointer if deltaX/Y remain high for a 
determined period of time (as available in Windows or KDE for example)


Nicolas