"Jagged" texture problem
Author
Hi folks,
I''m experiencing a little problem here - as long as the camera sticks close to objects, everything works just fine.
The bigger the distance gets, the more "jagged" the objects look.
Here''s an example of it:
http://home.arcor.de/jesc/public/jagged.gif
(As you can see, the green floor ''overlaps'' the walls and the roof became partially ''transparent'')
It seems like there''s something wrong with the z-buffer, but I can''t seem to figure it out. Any ideas of what might be wrong?
Any help/ideas would be greatly appreciated!
Nescis mi fili, quantilla prudentis mundus regatur
You might check in your video driver settings to make sure the depth is greater than 16bit.
Edit: Z-buffer depth that is
[edited by - Schmedly on March 22, 2004 5:33:23 PM]
Edit: Z-buffer depth that is
[edited by - Schmedly on March 22, 2004 5:33:23 PM]
Author
Thanks, I've changed the format to D3DFMT_D24X8 - it now works, but is it really necessary to use a buffer >16 bit?
Nescis mi fili, quantilla prudentis mundus regatur
[edited by - IH82W8 on March 22, 2004 5:35:43 PM]
Nescis mi fili, quantilla prudentis mundus regatur
[edited by - IH82W8 on March 22, 2004 5:35:43 PM]
Depending on a few things, namely your settings for the near and far clip of the view frustum along with the scale of your content... yes it can be necessary to use a higher resolution z-buffer.
As I understand this stuff (which isn''t very well) you should be able to get by with a 16-bit Z buffer as long as you''ve set up your world dimensions correctly.
For example: if you consider each unit of depth to be 1 mm, and you''re looking down on your house from 10 km, then you could run into some serious Z-buffer issues. But if you consider each unit of dimension to be 1 meter and you''re looking at things < 1 Km away you''ll be OK.
In other words, check how much "depth" this particular scene has. Then divide that max_depth by 65536 (max of a 16-bit value). If max_depth/65535 > 1.0 then you''ll probably have problems.
Actually I''m not very experienced so don''t take this as "truth", I''m just thinking out-loud.
For example: if you consider each unit of depth to be 1 mm, and you''re looking down on your house from 10 km, then you could run into some serious Z-buffer issues. But if you consider each unit of dimension to be 1 meter and you''re looking at things < 1 Km away you''ll be OK.
In other words, check how much "depth" this particular scene has. Then divide that max_depth by 65536 (max of a 16-bit value). If max_depth/65535 > 1.0 then you''ll probably have problems.
Actually I''m not very experienced so don''t take this as "truth", I''m just thinking out-loud.
Author
Well, the distance was pretty small. I already experienced this problem when the camera was about 300 units away.
A good way to get rid of it was to set a higher near plane - then a 16 bit z depth buffer works just fine.
So, problem solved =)
Nescis mi fili, quantilla prudentis mundus regatur
A good way to get rid of it was to set a higher near plane - then a 16 bit z depth buffer works just fine.
So, problem solved =)
Nescis mi fili, quantilla prudentis mundus regatur
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