Made for 2022 AP CS A Q1 exploration by Kevin Zhu
Inspired by p5.js examples Letters and Springs
Add to draw() outside of nested for loops and before theta is updated
strokeWeight(8);
line(canvasR * cos(theta) * Math.sqrt(2), canvasR * sin(theta) * Math.sqrt(2), 0, 0);Add to draw() directly after updatePos() and text() and before i++
push();
textSize(10);
scale(1, -1);
text(items[i].saveXY[0] + ' ' + items[i].saveXY[1], items[i].saveXY[0], -(items[i].saveXY[1] - 15));
pop();Add this.saveXY = [x, y]; to the Letter class
Add to draw() directly after updatePos() and text() and before i++
// draw movement vectors
line(items[i].restPoints[0][0], items[i].restPoints[0][1], items[i].restPoints[1][0], items[i].restPoints[1][1]);