Trying to get click location with good performance

[cruise-automation]

Trying to get click location with good performance

[conrad]

Hi @vidaaudrey! Thanks, I'll check out the new unofficial version.

After clicking and logging out the ray for a bit, I wasn't able to determine what the point Vec3 array represents--it's value changes weren't very predictable for me. BUT what I did find was the planeIntersection method on the Ray object that did exactly what we wanted. ray.planeIntersection([0, 0, 0], [0, 0, 1]) gives me what we're looking for.

[conrad]

What I'd like to write looks like this:

  getFloor = () => {
    const vertices = [
      { x: FLOOR_LENGTH / 2, y: FLOOR_LENGTH / 2, z: 0 },
      { x: -FLOOR_LENGTH / 2, y: FLOOR_LENGTH / 2, z: 0 },
      { x: -FLOOR_LENGTH / 2, y: -FLOOR_LENGTH / 2, z: 0 },
      { x: FLOOR_LENGTH / 2, y: -FLOOR_LENGTH / 2, z: 0 },
    ]
    const floorPolygonData = [
      {
        id: 1111,
        points: vertices,
        color: WORLDVIEW_RGB.clear,
      }
    ]
    return (
      <FilledPolygons
        onClick={this.handleFloorClick}>
        {floorPolygonData}
      </FilledPolygons>
    )
  }

In this, the click event would have to get the coordinates of where on the object the click hit. Is there a way to do this?

[vidaaudrey]

Hey @conrad the onClick event does give you a ray object which contains the raycasting information including dir (direction), origin, and clicked point (all in Vec3 format). Try it out and see if satisfies your requirement.

Regarding on the performance, there is some extra computation in FilledPolygons to get the points. You could try use Triangles directly. https://github.com/cruise-automation/webviz/blob/master/packages/regl-worldview/src/commands/FilledPolygons.js#L71

In addition, Worldview 0.2.0 is unofficially available now (ref #177). It has some performance optimizations and you no longer need to pass the id in. We've been testing it internally with lots of moving objects and PointCloud. Let us know if you have any questions or still see perf drops after you try it out.

[vidaaudrey]

Great that your found a work-around. BTW, the new version is available now and here is the migration guide: https://webviz.io/worldview/#/docs/migration-notes/migrating-to-version-0.2.x