[solved] two images by canvas function

kei

Hi,
I'm now moving to inline scripting for making program. I have a simple question: how can I show two images simultaneously on screen by canvas.image function? I simply wrote:

(in preparation tab)

from openexp.canvas import canvas
my_canvas = canvas(exp)
path = exp.get_file('Stim.png')
my_canvas.image(path,-400,0)
my_canvas.image(path,400,0)
my_canvas.prepare

(in run tab)

my_canvas.show()

-

This showed only one image, but not two images. Please advice me if I mistake scripting!
Hiro

sebastiaan

Hi Hiro,

You're running into a weird property of OpenSesame: In Python code, 0, 0 is the top-left of the display, and not the center. So you're showing the first image outside the display boundaries.

So you'll want to do something like (note also the parameters to canvas.image):

from openexp.canvas import canvas
xc = self.get('width')/2
my_canvas = canvas(exp)
path = exp.get_file('Stim.png')
my_canvas.image(path,x=xc-200)
my_canvas.image(path,x=xc+200)
my_canvas.show()

By the way, this annoyingly inconsistent behavior will be improved in OpenSesame 3.0.0!

• http://osdoc.cogsci.nl/3.0/miscellaneous/important-changes-3/

Cheers,
Sebastiaan

kei

Thanks! I can solve it.