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Re: Release of Enigma 1.30-alpha

From: Andreas Lochmann
Subject: Re: Release of Enigma 1.30-alpha
Date: Fri, 25 Dec 2020 13:56:33 +0100

Hmm ... please change line 932 in video.cc from
    SDL_SetRelativeMouseMode(enabled ? SDL_TRUE : SDL_FALSE);

In my case (Ubuntu, XFCE) this introduces another bug: As soon as the (invisible) mouse cursor leaves Enigma's window, no more mouse events are reported. This means that the ball stops moving at some point, until the (invisible) mouse cursor re-enters the window. If this works for you, or at least gets rid of the large xrel/yrel-numbers, we can try to work from there.

Could you also try the following as replacement for line 932?
  Log << "Result of SetRelativeMouseMode: " << SDL_SetRelativeMouseMode(SDL_TRUE) << "\n";
I assume that "enigma --log" yields something like
  "Result of SetRelativeMouseMode: -1";
Indicating an error.

Oh, and is there a "Last SDL error:" at the end of the log (fourth line from the bottom)
(Probably just "missing sound", but maybe it's an important hint.)

Am Fr., 25. Dez. 2020 um 04:39 Uhr schrieb Sidney Markowitz <sidney@sidney.com>:
Andreas Lochmann wrote on 25/12/20 11:19 am:
> Could you try "enigma --log --nograb"? This is no solution, but it helps to
> pin down the problem. It sets two SDL-switches to false; one of them grabs the
> mouse, such that Enigma does not loose focus when the mouse cursor leaves the
> window; the other one is connected to relative mouse motion. The first switch
> has to be on for the game to be playable, but the second ... who knows?

That helped, although as you said, disabling the mouse grab option part of
that makes the game unplayable.

Here is what I found before I tried the --log --nograb options:

Removing the external monitors made no difference. Changing the resolution on
my laptop screen made no difference.

When I moved the Enigma game window around the virtual desktop, I found that
the mouse event numbers got smaller the closer to the upper left corner I put
it. I could never get it close enough to the upper left corner top actually
work. The smallest numbers were in the 2000 range. When I moved the window
toward the lower right corner of the virtual desktop, the numbers could get up
into the forty-some thousands.

When I changed the size of the virtual display screen, the numbers in the
mouse event output looked like the virtual screen was always something like
45,000 or maybe 50,000 in size. Wherever the Enigma window was and whatever
size it was, the mouse event numbers looked like they were based on the
position of the mouse within the virtual desktop. For example, if I set the
desktop to be as big as I could and set the Enigma window to be as small as I
could, then when I put the Enigma window in the upper left, the mouse event
numbers could get as low as in the 2000's. But if the virtual display was set
to a smaller resolution, the enigma window occupied more of it, so when I put
the Enigma window in the upper left, the mouse position of the ball was
farther away from the upper left corner as a proportion of virtual display
screen size, and the mouse event numbers could not get lower than the
20,000's. In other words, imagine that no matter what the resolution settings
in the VM, no matter how many or few pixels the desktop is, when I started a
level the mouse events showed where the ball is in a coordinate system that
scales to make the desktop approximately 50000x50000.

Here is what I found trying enigma --log --nograb options:

I was able to control the ball with mouse properly, although it was a bit
erratic when I set a very large virtual screen size and scaled it to fit on my
physical screen. The mouse event numbers were in the two digits range and some
of them were negative numbers. If there was an option that did the same thing
for relative mouse without disabling mouse grab, that might work.


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