fix bug for missing filed in case of mt/mst loc

Author: marcobarilari

subfun/preTrialSetup.m

@@ -12,7 +12,8 @@
     thisEvent.direction = cfg.design.directions(iBlock, iEvent);
     thisEvent.speedPix = cfg.design.speeds(iBlock, iEvent);
     thisEvent.target = cfg.design.fixationTargets(iBlock, iEvent);
-    thisEvent.fixationPosition = cfg.design.blockFixationPosition{iBlock};
+    
+
 
     % If this frame shows a target we change the color of the cross
     thisFixation.fixation = cfg.fixation;
@@ -28,24 +29,30 @@
     %
 
     thisEvent.dotCenterXPosPix = 0;
-
-    switch thisEvent.fixationPosition
-        case 'fixation_right'
-            cfg.aperture.xPosPix = -abs(cfg.aperture.xPosPix);
-
-            thisEvent.dotCenterXPosPix = cfg.aperture.xPosPix;
-
-            thisFixation.fixation.xDisplacement = cfg.design.xDisplacementFixation;
-            thisFixation = initFixation(thisFixation);
-
-        case 'fixation_left'
-            cfg.aperture.xPosPix = +abs(cfg.aperture.xPosPix);
-
-            thisEvent.dotCenterXPosPix = cfg.aperture.xPosPix;
-
-            thisFixation.fixation.xDisplacement = -cfg.design.xDisplacementFixation;
-            thisFixation = initFixation(thisFixation);
-
+    
+    if isfield(cfg.design, 'localizer') && strcmpi(cfg.design.localizer, 'MT_MST')
+        
+        thisEvent.fixationPosition = cfg.design.blockFixationPosition{iBlock};
+        
+        switch thisEvent.fixationPosition
+            case 'fixation_right'
+                cfg.aperture.xPosPix = -abs(cfg.aperture.xPosPix);
+                
+                thisEvent.dotCenterXPosPix = cfg.aperture.xPosPix;
+                
+                thisFixation.fixation.xDisplacement = cfg.design.xDisplacementFixation;
+                thisFixation = initFixation(thisFixation);
+                
+            case 'fixation_left'
+                cfg.aperture.xPosPix = +abs(cfg.aperture.xPosPix);
+                
+                thisEvent.dotCenterXPosPix = cfg.aperture.xPosPix;
+                
+                thisFixation.fixation.xDisplacement = -cfg.design.xDisplacementFixation;
+                thisFixation = initFixation(thisFixation);
+                
+        end
+        
     end
 
     varargout = {thisEvent, thisFixation, cfg};