[open] Error message

Elza

Hi all!

When a try to run my program, the following appears:

An unexpected error occurred, which was not caught by OpenSesame. This should not happen! Message:
width greater than ellipse radius

What does this error message mean?

sebastiaan

Hi Elza,

My guess is that either the width or the height of the ellipse is 0 or negative. Could that be it? For example, this line of code will trigger this error:

my_canvas.ellipse(100, 100, 50, 0)

Cheers!
Sebastiaan

KJO

Sorry, I'm very new to OpenSesame and just trying out some of the tutorials before creating my own experiment. I'm currently working on the 'cats, dogs and capybaras' tutorial. I've followed the instructions to set up the experiment but after the instruction screen I get the error message above. Could you please explain what this means and how I can fix this?
Thanks!

sebastiaan

You will get that error message if you draw an ellipse with a height that is zero or negative. In an inline_script, you will get the error with a line like this (the arguments are: x, y, width, height) ...

my_canvas.ellipse(100, 100, 50, 0)

... and in an OpenSesame script like this ...

draw ellipse 100 100 50 0 fill=0 penwidth=1 color=white show_if="always"

The solution would be to change the 0 height to a positive value, for example:

draw ellipse 100 100 50 50 fill=0 penwidth=1 color=white show_if="always"

Cheers!
Sebastiaan