Mesh disappears when its position is off screen

Nik · April 5, 2021, 4:23pm

I have a few NPC characters walking around. Their position is at their feet. If their feet are off screen then the entire mesh disappears. I tried setting frustrumCulled to false for the mesh and its children, but that didn’t have any effect.

Any advice?

donmccurdy · April 5, 2021, 4:56pm

Setting .frustumCulled = false on the SkinnedMesh instance should be enough, yes. If that’s not working then I think you may need to share code or an example we can debug.

Nik · April 6, 2021, 7:34am

Thanks Don.

Live example
https://niksgames.com/threejs-games-course/complete/lecture6_6/

GitHub

The example uses your Pathfinding library. Wait around if no NPCs are there, they’ll turn up soon.

BTW I was finding that the mergeVertices method wasn’t returning geometry that worked for most of my NavMeshes after the switch to BufferGeometry. So I rewrote the indexing method. It’s prepGeometry in this file.

github.com

NikLever/threejs-games-course/blob/ddec195f7ea8cf98730c0a97f1a62e4c5966aac6/libs/pathfinding/Utils.js

import { BufferAttribute, BufferGeometry, Float32BufferAttribute } from '../three126/three.module.js';

class Utils {

  static roundNumber (value, decimals) {
    const factor = Math.pow(10, decimals);
    return Math.round(value * factor) / factor;
  }

  static sample (list) {
    return list[Math.floor(Math.random() * list.length)];
  }

  static distanceToSquared (a, b) {

    var dx = a.x - b.x;
    var dy = a.y - b.y;
    var dz = a.z - b.z;

    return dx * dx + dy * dy + dz * dz;

This file has been truncated. show original

I also added tolerance as a parameter to Pathfinding.createZone and pass this through to the Utils call. Works great for all my NavMeshes now. I added an issue comment in your GitHub three-pathfinding repo.

rrrr_rrrr · April 6, 2021, 8:33am

[object Boolean] frust r umCulled = false
[object Boolean] frustumCulled = !1;

Please correct the typo

Nik · April 6, 2021, 8:50am

Genius. Thanks. Working perfectly now.

rrrr_rrrr · April 7, 2021, 11:17am

You might wanna look into boundingSphere.
If the geometry has been transformed after the first render, boundingSphere should be recalculated.

Best of Luck.

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Mesh disappears when its position is off screen

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