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--- biac:experimentalcontrol:biac6hardware [2024/04/15 19:23]
cmp12 [BIAC6 Screen Configuration]
+++ biac:experimentalcontrol:biac6hardware [2024/04/16 14:21] (current)
cmp12 [BIAC6 Screen Configuration]
@@ Line 127: / Line 127: @@
 A **CLONED** configuration with goggles off, will result in a single monitor to programs like PsychToolbox and PsychoPy.
+PTB:
 <code matlab>
 >> run SetupPsychtoolbox.m
->> Screen('Screens')
+>> 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>
+import pyglet
+display = pyglet.canvas.get_display()
+screens = display.get_screens()
+screens
+>>[Win32Screen(x=0, y=0, width=1920, height=1080)]
+ # screens[0] is the one and only screen
 </code>
-Any **EXTENDED** configuration will result in multiple monitors being available
+Any **EXTENDED** configuration, or configuration with goggles will result in multiple monitors being available.
+PTB:
 <code matlab>
 >> run SetupPsychtoolbox.m
->> Screen('Screens')
+>> screens = Screen('Screens')
 ans =
      1     2
    %in this case
-   % 0 - the full display across the extended desktop
+   % 0 - the full extended display across the desktop
-   % 1 - screen #1
+   % 1 - screen #1 only
-   % 2 - screen #2
+   % 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:
-For instance PsychoPy the first screen would be #0
 <code python>
@@ Line 160: / Line 197: @@
 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), Win32Screen(x=1920, 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 first screen
-win = visual.Window(size=win_res, screen=screenNum, allowGUI=True,
+ # screens[1] is the second screen because python is zero indexed
-                    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 ).
+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.
-<code matlab>
+  * screen 0 in matlab **only** if its a **cloned** display, or screen 1 if it is extended/goggles
+  * screen 0 in PTB
-%configure the first screen is psychtoolbox
-screenNumber = 1;
-[Window,var.winrect] = Screen('OpenWindow',screenNumber,0);
+One of the best ways to account for a variable to setup in matlab would be to code the task to work with either.
-</code>
+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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