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*** Function level of importance = High.
The human eye can not see clearly objects that are too near the eye.
Try reading a newspaper when your eye is one centimeter a way from the page ...
The camera object (see the STATE_camera_ API ) which is the computer eye for rendering, act
similarly to the human eye. This function determines the closest distance in which the camera
is able to see objects. The parts of objects that are closer than this number will not be seen.
Calling this function with a number too small has its price.
The bigger this number is the more accurate the rendering of the objects will be
On the other hand a number too big will hide objects that are near
the camera. Typical values are 1, 4, 10, 20 100.
Try to make this number as big as you can. Stop increasing this number
when near objects are not drawn.
Important :
In some cases increasing the number can improve the rendering speed dramatically.
return OK or VR_ERROR
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