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--- biac:experimentalcontrol:biac6hardware [2024/02/12 17:39]
cmp12 [BIAC6 Screen Configuration]
+++ biac:experimentalcontrol:biac6hardware [2024/04/16 14:21] (current)
cmp12 [BIAC6 Screen Configuration]
@@ Line 92: / Line 92: @@
-==== BIAC6 Screen Configuration ====
+===== BIAC6 Screen Configuration =====
   * BIAC6 is equipped with NordicNeuroLab ( NNL ) [[https://www.nordicneurolab.com/product/visualsystem-hd|VisualSystemHD]] goggles for stereoscopic display
@@ Line 101: / Line 101: @@
   * when configuring your tasks to display, please take account of which monitor you are sending the outputs since 3,4 will always be the googles only.
-One of the best ways to assure your configuration stays the same is to select a default display icon from the desktop ( ie: Clone or Extended displays )
+  * the best way to control the monitor configuration on BIAC6 is with [[https://www.displayfusion.com/HelpGuide/WorkingWithDisplayFusionMonitorProfiles/|DisplayFusion]]
+  * there are several pre-configured profiles automatically loaded on BIAC6 to choose from:
+    * 1024x768, 1280x1024, 1920x1080 cloned displays ( on monitors 1,2 )
+    * 1920x1080 extended desktop ( across 1,2 )
+    * 1920x1080 cloned displays with the NNL goggles as individual display 3,4
+    * 1920x1080 extended ( across 1,2 ) with the NNL goggles as individual displays 3,4
+    * more default profiles can be added, but you can also configure and save your own profiles
-{{ :biac:display_graphics:display_icons.png?600 |}}
+{{ :biac:experimentalcontrol:df2.png?600 |}}
-Extended Displays will show up as 4 separate screens in the system information
+If you do not use the NNL goggles, then it's probably in your interest to leave them disabled.
-{{ :biac:display_graphics:extended_display_biac6.png?600 |}}
+The DisplayFusion monitor configuration is accessible from the Desktop icon, from the Start Menu, by Right clicking on the desktop, from the system panel at the bottom Right.
-Depending on your stimulus presentation software you may want to hard-code which display you are presenting your task.
+{{ :biac:experimentalcontrol:df4.png?400 |}}
-For instance PsychoPy the first screen would be #0
+A couple of the 1920x1080 profiles are accessible directly from most of the system's Apps by clicking the profile on the upper right hand corner.
+{{ :biac:experimentalcontrol:df3.png?600 |}}
+The "Reset Video" desktop icon will now just revert to 1920x1080 cloned displays, with the goggles disabled.
+Because of the variable nature of the display configuration, its best to login and select your preferred display profile, to always start the experiment session with a known configuration.
+A **CLONED** configuration with goggles off, will result in a single monitor to programs like PsychToolbox and PsychoPy.
+PTB:
+<code matlab>
+>> run SetupPsychtoolbox.m
+>> screens = Screen('Screens')
+ans =
+
+  % there is only a single screen
+  % you can use the first index, or min / max functions because there is only 1 option
+>> screens(1)
+ans =
+
+>> min(screens)
+ans =
+
+>> max(screens)
+ans =
+
+</code>
+PsychoPy:
 <code python>
@@ Line 118: / Line 159: @@
 display = pyglet.canvas.get_display()
 screens = display.get_screens()
-screenNum = 0
+screens
-#get resolution of screen 0
+>>[Win32Screen(x=0, y=0, width=1920, height=1080)]
-win_res = [screens[screenNum].width, screens[screenNum].height]
-#set the output to always go to screen 0
+ # screens[0] is the one and only screen
-win = visual.Window(size=win_res, screen=screenNum, allowGUI=True,
-                    fullscr=True, monitor=exp_mon, units='height',
-                    color=(0.2, 0.2, 0.2))
-msg1 = visual.TextStim(win, text=u"Hello world!", pos=(0,0)) #centered
-msg1.draw() #draw it
-win.flip() #put it on the screen
-core.wait(5) #wait 5 seconds
-win.close() #close it
-core.quit() #stop
 </code>
-matlab PTB the first screen would be #1 ( matlab is indexed starting at 1 instead of 0 ).
+Any **EXTENDED** configuration, or configuration with goggles will result in multiple monitors being available.
+PTB:
 <code matlab>
-%configure the first screen is psychtoolbox
+>> run SetupPsychtoolbox.m
-screenNumber = 1;
+>> screens = Screen('Screens')
-[Window,var.winrect] = Screen('OpenWindow',screenNumber,0);
+ans =
+     1     2
+   %in this case
+   % 0 - the full extended display across the desktop
+   % 1 - screen #1 only
+   % 2 - screen #2 only
+   % because matlab is indexed a 1, you need to select the correct index to get to screen #1
+>> screens(2)
+ans =
+
+</code>
+PsychoPy:
+<code python>
+import pyglet
+display = pyglet.canvas.get_display()
+screens = display.get_screens()
+screens
+>>[Win32Screen(x=0, y=0, width=1920, height=1080), Win32Screen(x=1920, y=0, width=1920, height=1080)]
+ # screens[0] is the first screen
+ # screens[1] is the second screen because python is zero indexed
 </code>
+You need to code your tasks to send to the specific screen you want your subjects to see.  If they are viewing the projector, then they can only single a screen at a time.  The default is to send the first display to the projector.
+  * screen 0 in matlab **only** if its a **cloned** display, or screen 1 if it is extended/goggles
+  * screen 0 in PTB
+One of the best ways to account for a variable to setup in matlab would be to code the task to work with either.
+Matlab:
+<code matlab>
+screens=Screen('Screens');
+%if there is only 1 entry
+if (length(screens) == 1)
+    %use it
+    S.screenNumber = min(screens);
+%but if there are more, use #1 explicitely
+elseif (length(screens) > 1)
+    S.screenNumber = screens(2);
+    %same as S.screenNumber = 1;
+end
+[S.Window, S.screenRect]=Screen('OpenWindow',S.screenNumber, S.screenColor,[],[],2,[],[]);
+</code>

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