Processing: Creative Coding and Computational Art

PROCESSING: CREATIVE CODING AND COMPUTATIONAL ART
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Once you have a single line doing some interesting stuff, you can try to extend the concept
with multiple lines. One way of thinking of this is as looping a loop. You can pretty easily
put your existing for loop within another for loop and move your line down the display
window, repeating the structure over and over again. It is often through these types of
overlapping iterative processes that really unexpected and interesting stuff starts emerging
out of the code. One caution, though: if you’ve been reading this stuff pretty quickly and
not thoroughly experimenting with these structures along the way, you’re missing many
interesting possibilities, and more importantly, the feature creep in the sketches is going to
quickly overwhelm you. I really recommend reading this chapter in small bites and then
thoroughly chewing through the code possibilities. It’s the best way to begin to remember
all the weird syntax and keywords. The next example runs the previous code through
another outer loop and adds some other modifications, drawing a series of lines down the
display window (see Figure 6-9).
/*
Razor Tooth Pattern
Ira Greenberg, November 20, 2005
*/
size(300, 300);
background(0);
int totalPts = 1000;
float steps = totalPts+1;
int totalRows = 50; // needs to be < = 300
int rowShift = height/totalRows;
float rowNudge = -.4;
float rowHop = 0;
int randNudge = 5;
stroke(255);
for (int i=rowShift; i