Processing: Creative Coding and Computational Art

Figure 10-9. Finished Nematode sketch
There’s so much more that could be done with the nematode, but I’ll leave that to you.
However, I’ll include one more nematode image, shown in Figure 10-10, on a dark background
with some minor changes to a few of the stroke values. Since the nematode image
is translucent, when you add a dark background, the image takes on an interesting look
and feel, resembling a film negative or X-ray.
Figure 10-10. Finished Inverted Nematode sketch
Setting the color mode
So far, this chapter has been using the fill() and stroke() functions with the default
RGB color mode. Using this mode, each of the R, G, and B color components can be
assigned an int or float value from 0 to 255. However, Processing has an alternative HSB
color mode, which can be set by calling colorMode(HSB). HSB stands for hue, saturation,
and brightness. These components correlate to the three color properties of hue, chromatic
intensity, and value, which I discussed earlier in the “Color theory” section of the
chapter. By default, RGB and HSB modes use a value range of 0 to 255 for each of
the three components. In the next example, I create the six primary and secondary colors
and cyan using both modes (see Figure 10-11):
COLOR AND IMAGING
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