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Tydude4Christ · Posted: Wed Jan 21, 2009 10:35 am Post subject: Problem with graphics.c

I'm currently using this lib to display a background and then my character sprite. When I move the character, which actually is moving my background pic, I see that the bottom half of my screen is getting "refreshed" faster than the top half of my screen.

Here's what I am doing.

Art · Joined: 09 Nov 2005 Posts: 647

Well there's going to be a problem when you draw the background image 480x272 at any coords other than 0,0
because you'll be trying to draw some of the background off the screen otherwise.

So look into a tile engine.
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If not actually, then potentially.

Tydude4Christ · Posted: Wed Jan 21, 2009 11:37 am Post subject:

The background image is actually just temporary. Currently, I'm just testing my character's movement. Eventually, I'll create a tile engine. I was just wondering whether the scanning problem would occur then. Thanks for the reply.

Art · Joined: 09 Nov 2005 Posts: 647

You've also forgotten the sceDisplayWaitVblankStart(); before the flipscreen.
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If not actually, then potentially.

Tydude4Christ · Posted: Wed Jan 21, 2009 11:50 am Post subject:

It appears sceDisplayWaitVblankStart() was my problem all along. It now works even when my background is not at (0,0). Thanks for the help.

Heimdall · Joined: 10 Nov 2005 Posts: 259 Location: Netherlands

Sorry for the naive question, what library is that? can you give a link?

Thanks!

Torch · Joined: 28 May 2008 Posts: 842

You of all people should know, its from lua player.

However it will be inefficient for games because it syncs the gu after each of those function calls. You can't queue up all your drawing into the dlist before execution.