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basic rendering

Started by rangler Jun 7, 2004 at 12:37 AM 4 replies 800+ views

Original Post

Jun 7, 2004 at 12:37 AM

Hi, I am very new at making games (working on first). My question is: If you have a double buffer system, which makes more sense? 1) You put the "draw from back buffer to front buffer" function in its own thread and frame rate sync it. or 2) In your main loop update & draw all the sprites than call "draw from back buffer to front buffer".

Joeman

Jun 7, 2004 at 2:10 AM

Wow! hold on a sec, are you using DirectX? if so what version?

Zipster

511

Zipster

Jun 7, 2004 at 2:46 AM

Avoid the extra thread. Besides, the back buffer is hardly ever literally copied to the front buffer. It''s more along the lines of swapping the pointer that points to the back buffer with the pointer that points to the front buffer, and vice versa. Both buffers thus switch rolls each frame.

rangler

Author

rangler

Jun 7, 2004 at 12:02 PM

Im using win32 GDI. The Front and Back buffer are both HDC. I am using BitBlt() to copy the back to the front.

rangler

Author

rangler

Jun 7, 2004 at 2:19 PM

So if I don''t put it into its own thread how can I program a constant frame rate, so I can set the animation speed?

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