/**

* 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 "coswave" is created and

* filled with the cosine values. This data is displayed three

* separate ways on the screen.

*/

float* coswave;

void setup() {

size(640, 360);

coswave = new float[width];

for (int i = 0; i < width; i++) {

float amount = map(i, 0, width, 0, PI);

coswave[i] = abs(cos(amount));

}

background(255);

noLoop();

}

void draw() {

int y1 = 0;

int y2 = height / 3;

for (int i = 0; i < width; i++) {

stroke(coswave[i] * 255);

line(i, y1, i, y2);

}

y1 = y2;

y2 = y1 + y1;

for (int i = 0; i < width; i++) {

stroke(coswave[i] * 255 / 4);

line(i, y1, i, y2);

}

y1 = y2;

y2 = height;

for (int i = 0; i < width; i++) {

stroke(255 - coswave[i] * 255);

line(i, y1, i, y2);

}

}