pyglet vs pygame for TextStims...

[Jon Roberts]

I am working on a project that requires both multiline text stimuli
and single word stimuli with underlining.

It appears that neither pygame nor pyglet support underlining so I
believe I have to draw that myself with a 2 vertex shapeStim. To do
this I need to know the width of the word on the screen. In pyglet,
the TextStim width property gives only the wrapping width for the
rectangle in which the TextStim is displayed. If I switch to pygame, I
get the width value I need to use to do the underline drawing, but
pygame does not seem to support multiline text stimuli, so it looks
like I will need to draw the lines of the multiline stimulus
individually.

Am I missing something, or does anyone have any better ideas? Also,
are there disadvantages to using pygame instead of pyglet?

Thanks

Jon Roberts
Computer Lab for Instruction in Psychological Research
Department of Psychology and Neuroscience
University of Colorado at Boulder

[Jon Peirce]

yes, right now pyglet supports multiline text and not pygame. That might change one day but isn't a priority.

Jon

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[Jon Peirce]

actually it would also be a trivial addition to implement underlining for text stimuli in either backend, but this would be underlining the entire stimulus, not just a single word or something.

Jon

[Jonathan O. Roberts]

That works for my current task...

Is pyglet preferable to pygame in general - better performance, etc.?

Using pyglet, I didn't see a way to get the width of the textStim itself, just the width or the word-wrapping rectangle...

thanks...

-Jon Roberts

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[Jon Peirce]

Jonathan O. Roberts wrote:

That works for my current task...

Is pyglet preferable to pygame in general - better performance, etc.?

No, I don't think so. In fact, for text, I think pygame might render faster than pyglet. The advantage of pyglet is its ability to handle multiple windows and monitors and the fact that it can play movies. If you have a single screen and don't need movies then pygame might be a better choice. I should add this to the docs I guess.

Using pyglet, I didn't see a way to get the width of the textStim itself, just the width or the word-wrapping rectangle...

Text width comes simply from font height and the aspect ratio of the font. Otherwise letters will get stretched in some odd ways.

thanks...

-Jon Roberts

On Mar 1, 2010, at 3:47 AM, Jon Peirce wrote:

actually it would also be a trivial addition to implement underlining for text stimuli in either backend, but this would be underlining the entire stimulus, not just a single word or something.

Jon

[Henrik Singmann]

Hello,

I am new to PsychoPy, and currently trying to get a rather simple
Simon experiment to running (actually, I am a little sad that there is
no demo implementation of a simple experiment with different trial
types, blocks, collecting responses and stuff, so if somebody got a
simple thing like this I would really like to take a look at and would
share what i got when it is ready).

As I finally got the trial-handling part, I am trying to implement the
presentation of the stimuli. Following the advise below I started
playing around with a pygame window. However, using either PatchStim
or ShapeStim does not work as expected. Especially, the sizes of the
objects are in no relation to the expected sizes. I just see a tiny
little spot in the center of th screen instead of a spot with 1cm
diameter. However, when changing the winType to 'pyglet' everything
looks fine (i.e., I measured it at my monitor and the sizes match).
It would be great if anyone could help me to dissolve this dissonance,
otherwise I just ignore the below menionted advise to use pygame.

Below you find the minimal code I used.

Greetings,

Henrik

PS: I adjusted the values in the monitor center dialogue to the actual ones.

from psychopy import *

myWin = visual.Window((800,800),monitor='testMonitor', units ='cm',
rgb=-1.0, winType='pygame')

bar = visual.ShapeStim(myWin,
lineRGB=[1,1,1],
lineWidth=2.0,
fillRGB=[1,1,1],
vertices=[[-0.2,0.5],[0.2,0.5],
[0.2,-0.5], [-0.2,-0.5]],
closeShape=True,
pos=[3,0])

fixSpot = visual.PatchStim(myWin,tex="none", units='cm',
mask="circle", size=[1,1],rgb=1)

bar.draw()
fixSpot.draw()
myWin.flip()
core.wait(20)

2010/3/3 Jon Peirce <jonatha...@nottingham.ac.uk>:

[Jon Peirce]

You're quite right. The measurements are way out for pygame right now. I wonder if there have been changes to the pygame library itself that has altered window scaling, because these definitely did /used/ to work fine :-$ . I'm afraid the reality is that I don't use the pygame backend for my own work, so I guess it's fallen into disrepair.

Michael MacAskill and Daniel Myall were planning to overhaul the calculation of vertex positions and I'm inclined to wait for them to finish before investigating this problem too deeply.

In the meantime, yes, just use pyglet backend. The difference mentioned below is relatively small and only relates to people that need to render large number of text stimuli.

all the best
Jon