What does Vertical Sync do in AFPD????
02-17-2005 | 05:08 PM
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RE: What does Vertical Sync do in AFPD????
Turning it on will cause the game to wait to draw the next frame until the monitor is done rendering the current frame which removes posible tearing artifacts from apearing. Turn it on, you may notice a slightly better picture and a drop in FPS. If the FPS drop is too noticable, disable it.
If you want a quick explanation of how it works, read on.
Your video card has memory on it that the sim writes the images to. Your monitor reads this buffer to draw the picture on your screen. If you monitors refresh rate is 75Hz, it does this 75 times a second and each pass takes 1/75th of a second. If v-sync is on the game waits to update that memory until the monitor says it has rendered the frame. If it is off, the game updates as fast as it can regardless of where the monitor is in the update pass.
As an example, you are copying a painting and you do it from top to bottom. If you get halfway through the painting and someone swiched the source on you, your painting would have first half of the first source on the top and the second half of the second source on the bottom. If "v-sync" was on, they would wait for you to finish your copy, then switch.
scott.
If you want a quick explanation of how it works, read on.
Your video card has memory on it that the sim writes the images to. Your monitor reads this buffer to draw the picture on your screen. If you monitors refresh rate is 75Hz, it does this 75 times a second and each pass takes 1/75th of a second. If v-sync is on the game waits to update that memory until the monitor says it has rendered the frame. If it is off, the game updates as fast as it can regardless of where the monitor is in the update pass.
As an example, you are copying a painting and you do it from top to bottom. If you get halfway through the painting and someone swiched the source on you, your painting would have first half of the first source on the top and the second half of the second source on the bottom. If "v-sync" was on, they would wait for you to finish your copy, then switch.
scott.
