03519: term2: Ems topgun lightgun cursor jumps to upper left corner

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
03519	DIP/Input	Minor	Always	Nov 3, 2009, 19:12	Nov 6, 2009, 09:10

Tester	GreatLamer	View Status	Public	Platform	MAME (Official Binary)
Assigned To		Resolution	No change required	OS	Windows XP (32-bit)
Status [?]	Closed			Driver
Version	0.135	Fixed in Version		Build	Normal
		Fixed in Git Commit		Github Pull Request #

Summary	03519: term2: Ems topgun lightgun cursor jumps to upper left corner
Description	Affected: Games with lightgun control (term2, ptblank tested) When the gun cursor moves to the screen edges and going offscreen, the cursor jumps to the upper left corner. If the gun pulled back to the screen the cursor jump to the right position. (Wanna be better if the cursor stay in the right part of edge like a mouse cursor)
Steps To Reproduce	Test with light gun only. Mouse works O.K.
Additional Information
Github Commit

Flags
Regression Version
Affected Sets / Systems	term2

Attached Files

No.05123 Tafoid Administrator Nov 3, 2009, 21:11	It would be nice if a Dev who knows or has a lightgun handles this? Normal Testers have no way of verifying this behavior.
No.05124 Haze Senior Tester Nov 3, 2009, 21:14 edited on: Nov 3, 2009, 21:15	Don't the lightguns act like mice? I'm assuming it must just report that it's moved to 0,0 co-ordinates or something when it's off-screen, in which case there isn't really much MAME can do?
No.05125 Tafoid Administrator Nov 3, 2009, 21:38	Well, given the fact the -mouse works ok and -lightgun apparently does not - it's something input related (in MAME) or setup related on the users end. I just don't have the knowledge to back up 100% either assumption.
No.05126 Haze Senior Tester Nov 3, 2009, 21:44	well the report doesn't seem to state that, just that the same problem doesn't occur when using a mouse, and I don't really see how you can point a mouse off-screen ;-) Anyway, I don't know for sure but it would surprise me if MAME was moving the cursor without being told to.
No.05127 GreatLamer Tester Nov 3, 2009, 21:46	For more reference, I test the gun in windows desktop because the gun moves the mouse pointer. If I pull the gun off screen, cursor stay the last position in any edge. But I know MAME uses other way to get the input (handle the gun directly, through RAW?) Some of the windows mouse-pointer based game works with the gun but some not (data handling dependent). I think when MAME get the "offscreen" property, should display the pointer in the last known onscreen position at the edge.
No.05128 Fujix Administrator Nov 4, 2009, 05:57	IIRC, MAME uses only keyboard raw input. I don't think there's some sort of input standard for light guns, those devices must be working via dedicated driver. If the lightgun is detected as a mouse device, you wont be able to put gun sight out of the screen as using a normal mouse. It's a correct work. ... btw, I noticed something essential.. The gun sight display is for non-light gun devices to tell where the sight is now! ;)