Color raster devices

Color raster devices A raster device can map an array stored in memory on to the screen so that the value of each element of the array controls the appearance of the corresponding point on the screen. It is possible to draw... 

Color raster devices A raster device can map an array stored in memory on to the screen so that the value of each element of the array controls the appearance of the corresponding point on the screen. It is possible to draw each atom as a shaded sphere, or to simulate the appearance of the Corey-Pauling-Koltun (CPK) physical models to maintain most of the famihar color scheme (i.e. C = black, N = blue, O = red, P = Green, and S = yellow). In such representation, atoms are usually opaque, so that only the front layer of atoms is visible. However, clipping with an inner plane or rotation can show the packing in the molecular interior. 

The displays used in the last section are usually raster devices due the the need for a variety of colors or shading options. The resolution of... 

The CRT displays are usually vector devices, usually of high resolution (1024 x 1024) to provide clean lines. Raster equipment with its lower resolution and "jaggies" does not provide any advantage until we add the complexity of the solid fill for surfaces, or a range of colors. Hardcopy - frequently pen plotters -is a normal requirement. 

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