Forslag til løsning av oppgave 8

• // let ax, ay, bx, by;
• let pencil_x, pencil_y;
• let track = [];
• let angleA, angleB;
• let speedA, speedB;
• function setup() {
  • createCanvas(400, 400);
  • noFill();
  • angleA = 0.0;
  • angleB = 0.0;
  • speedA = 0.05;
  • speedB = 0.07;
• }
• function draw() {
  • background(220);
  • strokeWeight(1);
  • ellipse(100, 100, 100);
  • ellipse(300, 300, 100);
  • ax = 100 + cos(angleA) * 50;
  • ay = 100 + sin(angleA) * 50;
  • bx = 300 + cos(angleB) * 50;
  • by = 300 + sin(angleB) * 50;
  • pencil_x = bx;
  • pencil_y = ay;
  • line(ax, ay, pencil_x, pencil_y); _{// Vannrett}
  • line(bx, by, pencil_x, pencil_y); _{// Loddrett}
  • strokeWeight(4);
  • point(ax, ay);
  • point(bx, by);
  • point(pencil_x, pencil_y);
  • angleA = angleA + speedA;
  • angleB = angleB + speedB;
  • let v = createVector(pencil_x, pencil_y); _{// Vektor, to verdier i samme variabel}
  • track.push(v); _{// Legger til celle sist i tabellen track}
  • _{// for at ikke tabellen skal bli for stor fjernes den første cellen som ble lagt inn}
  • if (track.length > 800) {
    • track.splice(0, 1); _{// Fjerner en celle fra og med celle nr 0}
  • }
  • strokeWeight(1);
    • for (i = 0; i < track.length; i++) {
  • point(track[i].x, track[i].y);
  • }
• }