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setNearValue artifacts

Posted: Thu Sep 30, 2010 3:13 am
by Terry
Hello everyone,

i've construct a big scene,for some special reasons,i need to modify the near value of camera.but i find it doesn't work like what i expect.
This is my experiment:
set camera position: -21690.0f, 3000.0f, -25938.0f
set camera target :-21690.0f, 1.0000f, -25938.0f
there is a plane located at : -21690.0f, -1.0000f, -25938.0f

if i set 4000.0f as near value of camera,the plane still could be seen,untill i set near value as 5280.0f the plane disappear.

I'd like to know why?
near clipping function doesn't work like what we think?

any suggestion would be appreciated!