Method constructCovGenerator

src/SplatMesh.ts:736–818

(context: SplatMeshContext)

  }

  constructCovGenerator(context: SplatMeshContext) {
    // console.log("CovSplatMesh.constructCovGenerator");
    const { covTransform, covViewToObject, recolor } = context;
    const generator = dynoBlock(
      { index: "int" },
      { covsplat: CovSplat },
      ({ index }) => {
        if (!index) {
          throw new Error("index is undefined");
        }

        index = maybeLookupIndex(
          context.lodIndices,
          index,
          context.numSplats,
          context.enableLod,
          this.showLodPageDyno,
        );

        // Read a Gsplat from the SplatSource
        context.splats.prepareFetchSplat();
        let gsplat = context.splats.fetchSplat({
          index,
          viewOrigin: covViewToObject.offset,
        });

        if (this.splatRgba) {
          // Overwrite RGBA with baked RGBA values
          gsplat = maybeInjectSplatRgba(
            gsplat,
            this.splatRgba.dyno,
            index,
            context.enableLod,
          );
        }

        if (this.objectModifiers) {
          // Inject object-space Gsplat modifier dyno
          for (const modifier of this.objectModifiers) {
            gsplat = modifier.apply({ gsplat }).gsplat;
          }
        }

        let covsplat = gsplatToCovSplat(gsplat);

        if (this.skinning) {
          // Transform according to bones + skinning weights
          covsplat = this.skinning.modifyCov(covsplat);
        }

        if (this.covObjectModifiers) {
          // Inject object-space CovSplat modifier dyno
          for (const modifier of this.covObjectModifiers) {
            covsplat = modifier.apply({ covsplat }).covsplat;
          }
        }

        // Transform from object to world-space