Floating origin, billboarding and thin instances

Evgeni_Popov · November 7, 2023, 11:51am

I don’t think the floating origin is relevant, the problem is that you’ll have to calculate each thin matrix yourself. You can take inspiration from the function TransformNode.computeWorldMatrix :

github.com

Popov72/Babylon.js/blob/master/packages/dev/core/src/Meshes/transformNode.ts#L1043-L1293


      
          public computeWorldMatrix(force: boolean = false, camera: Nullable<Camera> = null): Matrix {

              if (this._isWorldMatrixFrozen && !this._isDirty) {

                  return this._worldMatrix;

              }

          

              const currentRenderId = this.getScene().getRenderId();

              if (!this._isDirty && !force && (this._currentRenderId === currentRenderId || this.isSynchronized())) {

                  this._currentRenderId = currentRenderId;

                  return this._worldMatrix;

              }

          

              camera = camera || this.getScene().activeCamera;

          

              this._updateCache();

              const cache = this._cache;

              cache.pivotMatrixUpdated = false;

              cache.billboardMode = this.billboardMode;

              cache.infiniteDistance = this.infiniteDistance;

              cache.parent = this._parentNode;

This file has been truncated. show original

It’s a bit complicated because it has to manage a lot of things, so you’ll have to clean up!

Topic		Replies	Views
Billboard thin instances don't work correctly Bugs	3	578	March 30, 2022
ThinInstance Billboard? Questions	2	330	January 30, 2023
Use thinInstance and billboradMode Questions	1	19	March 13, 2025
Automatically Convert Instances to Thin Instances? Questions	13	718	September 20, 2023
Problem of Thin Instance Questions thininstances	5	54	August 28, 2024

Floating origin, billboarding and thin instances

Related topics