Fat Object Trails

Questions
1

I’ve been playing around with a JSFiddle that is based on the fat lines three.js example; this fiddle differs from the original example in that the lines are animated. I understand what’s happening in the code, but I’m struggling to understand how I could use the technique for rendering fat lines used in this example to create a trail for a moving object.

I’m currently creating the object trails like this:

  getTrail() {
      const trailGeometry = new THREE.Geometry();

      for (var i = 0; i < this.mass.trailVertices; i++)
          trailGeometry.vertices.push(
              new THREE.Vector3().copy(this.getObjectByName('Main').position)
          );

      const trailMaterial = new THREE.LineBasicMaterial({
          color: this.mass.color
      });

      const trail = new THREE.Line(trailGeometry, trailMaterial);

      trail.name = 'Trail';

      trail.frustumCulled = false;

      this.add(trail);
  }

To update the trails I run the following code every time the render loop runs:

  draw(x, y, z) {
      const main = this.getObjectByName('Main');
      const trail = this.getObjectByName('Trail');

      main.position.set(x, y, z);

      if (trail !== undefined) {
          trail.geometry.vertices.unshift(new THREE.Vector3().copy(main.position));
          trail.geometry.vertices.length = this.mass.trailVertices;
          trail.geometry.verticesNeedUpdate = true;
      }
  }

Is it possible to create motion trails for an object with fat lines and if so how would I go about it?

2

Is that what you’re looking for?

in the collection: http://discourse.threejs.hofk.de/
http://discourse.threejs.hofk.de/MotionGuide/MotionGuide.html
from

3

Thanks for your quick response!

Unfortunately it’s not; first, I want to have trails that are fat as in the fiddle I provided in my question, and second, I want the trail (line) to follow the object and not the other way around as in the fiddle you included a link to. To get an idea of what I’m trying to achieve, you can check out the trails I’m currently rendering (this is the project I want the fat trails for):

Silly Gravity Simulator