Re: flickering square on function call

[Nathan]

On Fri, Oct 19, 2012 at 2:29 PM, hotelCA <it.is...@gmail.com> wrote:

Hi, so basically I have an application with a square in the middle that blinks at a certain frequency. The frequency is determined by pyglet.clock.schedule_interval(Blinker, Rate). It basically calls the function Blinker at the time interval of Rate. Now, I have @window.event section, where I have defined on_draw(). Everything works fine, except that on_draw() is triggered on every window event, including hovering the mouse over the window. How do I disable all window events, except the function call? Thanks.

You could just not implement the on_draw() event.  Just rename your on_draw() to some other name, and don't decorate it as the on_draw() event, and then just call it when you want to.

~ Nathan 

[Anonymouse]

And add window.flip() to the Blinker function so that it still redraws
the window.

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[hotelCA]

Hi Nathan,

I have attached a modified code, using your advice. It now flickers totally randomly. I don't know what's wrong. Could you take a look at the code and point out what I have done wrong?

Thanks,

Quoc

[Anonymouse]

Hi Quoc,
I see no strange flickering except with higher blinking rates. This is
normal because a normal computer monitor will only refresh 60 times
per second, so it can't blink at the perfect rate and will instead
cause irregular blinking.

So this is a hardware limitation, nothing to do with pyglet (if I
understand correctly).

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[Anh Tran]

Well, if you set it to 12Hz or 15Hz, which divides into 60 nicely, so it should be smooth, shouldn't it?

Thanks

Quoc