Shapestim size and _vertices_px don't match

[deblecourt]

I got similar issues with updating ventrices, but then with clickable simuli that need to be drawn from .setAutoDraw(False) to .setAutoDraw(True). It seems that ._updateVertices is not always doing their job when drawing polygons. I fixed it by explicitly updating size and ventrices in the ‘Each Frame’ tab once the condition is met, using stim._needVertexUpdate = True.
See also:

Frame updating with polygons

Hi @alain, you can fix this by setting the polygon size to zero before the trial starts. That way, even though the polygon may be drawn, it is too small to be presented. In your “trial” routine, add the following to the “Begin Routine” tab of the “setResponse” code component: Python response.size = [0, 0] response._needVertexUpdate = True and if you do not have autotranslate… JavaScript response.size = [0, 0]; response._needVertexUpdate = true;