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ISRO CSE 2014 | Question: 34

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4 4 votes

In Z-buffer algorithm 2 buffers are used:

1. Frame Buffer

2. Depth Buffer

Depth buffer is used to store depth values for (x, y) position, as surfaces are processed (0 ≤ depth ≤ 1).

The frame buffer is used to store the intensity value of color value at each position (x, y).

total space required= depth buffer + frame buffer space

=>512 * 512 * 24 + 512 * 512 * 24 = 6291456 + 6291456 bits.

=> 12582912 bits

=> 1572864 Bytes

=>1.5 MB

2 2 votes

The Z-buffer is a technology used in almost all contemporary computers, laptops and mobile phones for performing 3D graphics, for example for computer games. The Z-buffer is implemented as hardware in the silicon ICs (integrated circuits) within these computers. The Z-buffer is also used (implemented as software as opposed to hardware) for producing computer-generated special effects for films.

Furthermore, Z-buffer data obtained from rendering a surface from a light's point-of-view permits the creation of shadows by the shadow mapping technique.

1 1 vote
512 X 512 X 24= 6291456 bits.

in KB= 6291456/ 1024 x 8 = 768 KB.
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