add submodule update and make it easier to decide on dot matix size

Author: Remi-Gau

lib/CPP_PTB

@@ -33,7 +33,7 @@
         % We assumed that zero is at the top left, but we want it to be
         %  in the center, so shift the dots up and left, which just means
         %  adding half of the screen width in pixel to both the x and y direction.
-        thisEvent.dot.positions = (dots.positions - cfg.screen.winWidth / 2)';
+        thisEvent.dot.positions = (dots.positions - cfg.dot.matrixWidth / 2)';
 
         %% make textures
         dotTexture('make', cfg, thisEvent);

subfun/doDotMo.m

@@ -33,6 +33,8 @@
     %% Init the experiment
     [cfg] = initPTB(cfg);
 
+    cfg.dot.matrixWidth = cfg.screen.winHeight;
+    
     % Convert some values from degrees to pixels
     cfg.dot = degToPix('size', cfg.dot, cfg);
     cfg.dot = degToPix('speed', cfg.dot, cfg);