_p_l_a_n_e_s is the number of bit planes requested to be configured as Z
buffer planes. Only positive values are accepted. The default
is machine dependent, usually 24 or 32.
DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
zzzzbbbbssssiiiizzzzeeee specifies how many bit planes are requested to be configured as Z
buffer planes. The constraints on _p_l_a_n_e_s are machine dependent. Call
ggggeeeettttggggddddeeeesssscccc((((GGGGDDDD____BBBBIIIITTTTSSSS____NNNNOOOORRRRMMMM____ZZZZBBBBUUUUFFFFFFFFEEEERRRR)))) to determine the maximum number of bit
planes available for Z buffer operation.
zzzzbbbbssssiiiizzzzeeee takes effect only after ggggccccoooonnnnffffiiiigggg has been called. The number of
bit planes granted for the Z buffer may not be exactly what was
requested. Call ggggeeeettttggggccccoooonnnnffffiiiigggg((((GGGGCCCC____BBBBIIIITTTTSSSS____ZZZZBBBBUUUUFFFFFFFFEEEERRRR)))) to determine how many bit
planes were configured as Z buffer planes.
Since Z buffer bit planes are available only in the normal framebuffer,
zzzzbbbbssssiiiizzzzeeee should be called only while draw mode is NNNNOOOORRRRMMMMAAAALLLLDDDDRRRRAAAAWWWW.
SSSSEEEEEEEE AAAALLLLSSSSOOOO
gconfig, getgconfig, getgdesc, mssize
NNNNOOOOTTTTEEEESSSS
This routine is available only in immediate mode.
Since most machines support only a finite set of Z buffer sizes, _p_l_a_n_e_s
is rounded to the nearest supported size.
IRIS-4D G, GT, GTX, VGX, and VGXT models, the Personal Iris, Iris Indy,
Indigo Entry, XL, XS, XS24, XZ, Elan and Extreme systems do not support
zzzzbbbbssssiiiizzzzeeee.
The IRIS-4D RealityEngine models support only values of 0, 24 or 32
_p_l_a_n_e_s. On these models the Z buffer and the depth component in the
multisample buffer are independent. When the multisample buffer is
requested in the current framebuffer configuration, it is recommended to
call zzzzbbbbssssiiiizzzzeeee((((0000)))), as no Z buffer planes are required.
BBBBUUUUGGGGSSSS
On the IRIS-4D RealityEngine models the framebuffer cannot be configured
to consist of 32 Z buffer planes (or 32 depth planes in the multisample
buffer) and 8 color planes for each of the RGB color buffers