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Dark GDK / Shapes not showing up-Help!

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JACrosman
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Posted: 9th Aug 2009 04:22
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Hi,
I have been working out of one of the Gaddis C++ books and have been working through the Dark GDK section. A couple of functions do not display anything at all on the screen when I call them. dbCircle and dbDot. dbLine works fine, I am just wondering if there may be something I am missing? Thanks a bunch!

-Josh
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IanM
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Posted: 9th Aug 2009 21:42
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Don't own the book, so a little code would be helpful.

Utility plug-ins collection (updated 07/04/09) and
http://www.matrix1.demon.co.uk
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JACrosman
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Posted: 9th Aug 2009 22:01
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Ok will do, here is just some simple code where i am trying to make a target like shape.



-Josh
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IanM
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Posted: 9th Aug 2009 22:09 Edited at: 9th Aug 2009 22:09
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There's no standard sync loop in that code - your display isn't being updated.

GDK uses a double-buffering system. There are two displays - the one you currently see, and the one you are currently drawing to. Once you have finished drawing, you need to use the dbSync() function to switch the two. Your code doesn't have that.

Replace the dbWaitKey() function call with this:


Utility plug-ins collection (updated 07/04/09) and
http://www.matrix1.demon.co.uk
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Lilith
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Posted: 9th Aug 2009 22:09
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Where's the dbSync() call? Where's the call to clear the screen before drawing?

Makes me kind wonder about whether the author actually tested the code.

Lilith, Night Butterfly
I'm not a programmer but I play one in the office
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Amnzero
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Posted: 9th Aug 2009 22:13
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No kidding Lil.

if(enemy == Amnzero) runAway();
Amnzero->WebSite = L"http://neovance.com/";
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JACrosman
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Posted: 10th Aug 2009 00:19
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Ahh, ok gotcha. Thanks for the help everyone!

-Josh
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