java/examples/Basics/Arrays/Array/Array.pde

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+/**
+ * Array. 
+ * 
+ * An array is a list of data. Each piece of data in an array 
+ * is identified by an index number representing its position in 
+ * the array. Arrays are zero based, which means that the first 
+ * element in the array is [0], the second element is [1], and so on. 
+ * In this example, an array named "coswav" is created and
+ * filled with the cosine values. This data is displayed three 
+ * separate ways on the screen.  
+ */
+
+size(200, 200);
+
+float[] coswave = new float[width];
+
+for (int i = 0; i < width; i++) {
+  float amount = map(i, 0, width, 0, PI);
+  coswave[i] = abs(cos(amount));
+}
+
+for (int i = 0; i < width; i++) {
+  stroke(coswave[i]*255);
+  line(i, 0, i, height/3);
+}
+
+for (int i = 0; i < width; i++) {
+  stroke(coswave[i]*255 / 4);
+  line(i, height/3, i, height/3*2);
+}
+
+for (int i = 0; i < width; i++) {
+  stroke(255 - coswave[i]*255);
+  line(i, height/3*2, i, height);
+}