hw6

float[] coswave; 

​

void setup() {

  size(800, 400);

  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(255,60,70);

  noLoop();

}

​

void draw() {

​

  int y1 = 0;

  int y2 = height/3;

  for (int i = 0; i < width; i+=2) {

    stroke(coswave[i]*255);

    line(i, y1, i, y2);

  }

​

  y1 = y2;

  y2 = y1 + y1;

  for (int i = 0; i < width; i+=2) {

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

    line(i, y1, i, y2);

  }

  y1 = y2;

  y2 = height;

  for (int i = 0; i < width; i+=2) {

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

    line(i, y1, i, y2);

  }

}