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Layer objects

Eitan.Hemed — Tue, 20 Sep 2016 08:36:51 GMT

Hi everyone,
I'm trying to order two shapes and a video object in a way that the shapes are 'on top'/'at front' and the video is 'on the bottom'/'at the back' (So it is partly hidden by the shapes). I've seen some reference from a couple of years ago in that topic regarding ordering the objects in a 'bottom to top' order through the stimulusframes attribute
(for example /stimulusframes = [10 = partlyHiddenObject, objectPartlyHidingOtherObject ;]), but for some reason it doesn't work for me.

If you could take a look at this excrept and direct me towards the answer, i'd be thankful, currently the objects are layered but vid_a_item is presented on top of leftFlankRec and rightFlankRec, even though i've tried ordering them differently in the /stimulusframes attribute. This is the opposite of what i'm trying to achieve.

[center]
<trial lernen_a>
/ ontrialbegin = [values.vid1 = list.vid_a_itemnumbers.nextvalue; ]
/stimulusframes = [1 = maske, fixation; 66 = vid_a_item, rightFlankRec, leftFlankRec;]
/trialduration = 1
/recorddata = true
/ontrialend = [values.datei = (video.vid_a_item.currentitem)]
</trial>
[/center]

Thanks again.
Eitan

RE: Layer objects

Dave — Tue, 20 Sep 2016 08:36:51 GMT

> Can videos overlap in Inquisit? Would it work that way (ordering via stimulusframes)?

Yes.

RE: Layer objects

Eitan.Hemed — Mon, 19 Sep 2016 23:54:44 GMT

Thanks, i'll try to implement that.
Can videos overlap in Inquisit? Would it work that way (ordering via stimulusframes)?

RE: Layer objects

Dave — Mon, 19 Sep 2016 07:18:36 GMT

Layering wont work like that if the stimulus in the "background" is a video -- the screen area occupied by the video must be constantly refreshed (otherwise there'd be no "moving pictures"), i.e., any *static* stimulus you put in the same area will immediately be overwritten by the video again (the static stimulus would be visible for a single frame, i.e., until that screen area refreshes / gets redrawn the next time for the video to keep playing).

The solution is to *not* use static stimuli here, but to have your "occluder" stimuli to also be <video>s (that just show a black screen for example).