Hi ,
I know that an object is placed on the orign in the
coordinates by default. but if I want to place a
background image(2D) on the screen,
1>where will it be put in the coordinates by default?
2>can i move the background image in the coordinates?
for example, I move it to the plane of (0,0, -20).
another question, I read the sun's "Getting Started
with Java3D API",it mentioned : the onlt tricky part
is in the specification of a geomtric background. All
background geometry is specified as points on a unit
sphere."
what does that mean? what is the unit sphere here?
thanks in advance.
Richard.
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