gpu.render.canvas.js

const size = 10.0;
const clr = 0.0;
const ps = 0.0;

rust
  .then((canvas) => {
    var nodes = document.getElementsByTagName("button");

    for (var i = 0; i < nodes.length; i++) {
      nodes[i].addEventListener(
        "click",
        function (i) {
          console.log("You clicked element #" + i);

          const color = [
            Math.abs(Math.cos(clr)),
            Math.abs(Math.sin(clr)),
            Math.abs(Math.sin(clr / 2) * Math.cos(clr * 2)),
            1.0,
          ];

          const prop = {
            color: color,
            size: [100, 100],
            marg: [20, 20],
            pose: [ps * 200, Math.cos(ps) * 200 + 200],
            shadow_size: size,
            radius: 40.0,
          };

          canvas.add_obj("ololo", prop);
          canvas.update();

          clr += 0.1;
          ps += 0.2;
        }.bind(null, i)
      );
    }
  })
  .catch(console.error);