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coordinate structure for multiple images and resolutions

Brabagazaa — Tue, 26 Sep 2017 07:07:52 GMT

Hello everyone,

Am currently working on a task that presents multiple items in a circle around the center of the screen. Each individual item has its own (x, y) coordinate, however, these have to change depending on the resolution. At the moment I am simply generating full lists of coordinates, and plan to select a list based on user input which will be used throughout the experiment, but this does mean that I can only provide coordinates for predetermined resolutions, is there an easier way to scale the coordinates? any advice is appreciated,
Roelof
PS: programming in inquisit 4

RE: coordinate structure for multiple images and resolutions

Brabagazaa — Tue, 26 Sep 2017 07:07:52 GMT

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[b]Dave - Monday, September 25, 2017[/b]

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[b]Brabagazaa - Monday, September 25, 2017[/b]

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Sure. You can prompt the user for information and calculate positions and/or sizes accordingly. See e.g. https://www.millisecond.com/forums/Topic14608.aspx and/or the Spatial Delayed Response Task for an implementation of such an approach: https://www.millisecond.com/download/library/spatialdelayedresponsetask/

Note that this is usually only necessary if you require sizes and/or positions to have specific physical dimensions. Otherwise, you should simply specify the positions and and sizes in percentages and then restrict the screen area (the "canvas") Inquisit uses to a fixed aspect ratio via the <defaults> element's /canvasaspectratio attribute. That way, you don't have to worry about different resolutions and/or aspect ratios across devices.

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That is perfect, I was using '/windowaspectratio = (1,1)' which meant full screen was lost,
but indeed canvasratio works perfectly, thank you very much

RE: coordinate structure for multiple images and resolutions

Dave — Mon, 25 Sep 2017 15:09:48 GMT

[quote]

[b]Brabagazaa - Monday, September 25, 2017[/b]

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