cesium/Source/Scene/Cesium3DTileContentFactory.js

CesiumJS is a JavaScript library for creating 3D globes and 2D maps in a web browser without a plugin.

import Batched3DModel3DTileContent from "./Batched3DModel3DTileContent.js";
import Composite3DTileContent from "./Composite3DTileContent.js";
import Geometry3DTileContent from "./Geometry3DTileContent.js";
import Implicit3DTileContent from "./Implicit3DTileContent.js";
import Instanced3DModel3DTileContent from "./Instanced3DModel3DTileContent.js";
import PointCloud3DTileContent from "./PointCloud3DTileContent.js";
import Tileset3DTileContent from "./Tileset3DTileContent.js";
import Vector3DTileContent from "./Vector3DTileContent.js";
import RuntimeError from "../Core/RuntimeError.js";
import ModelExperimental3DTileContent from "./ModelExperimental/ModelExperimental3DTileContent.js";

/**
 * Maps a tile's magic field in its header to a new content object for the tile's payload.
 *
 * @private
 */
const Cesium3DTileContentFactory = {
  b3dm: function (tileset, tile, resource, arrayBuffer, byteOffset) {
    if (tileset.enableModelExperimental) {
      return ModelExperimental3DTileContent.fromB3dm(
        tileset,
        tile,
        resource,
        arrayBuffer,
        byteOffset
      );
    }
    return new Batched3DModel3DTileContent(
      tileset,
      tile,
      resource,
      arrayBuffer,
      byteOffset
    );
  },
  pnts: function (tileset, tile, resource, arrayBuffer, byteOffset) {
    if (tileset.enableModelExperimental) {
      return ModelExperimental3DTileContent.fromPnts(
        tileset,
        tile,
        resource,
        arrayBuffer,
        byteOffset
      );
    }
    return new PointCloud3DTileContent(
      tileset,
      tile,
      resource,
      arrayBuffer,
      byteOffset
    );
  },
  i3dm: function (tileset, tile, resource, arrayBuffer, byteOffset) {
    if (tileset.enableModelExperimental) {
      return ModelExperimental3DTileContent.fromI3dm(
        tileset,
        tile,
        resource,
        arrayBuffer,
        byteOffset
      );
    }
    return new Instanced3DModel3DTileContent(
      tileset,
      tile,
      resource,
      arrayBuffer,
      byteOffset
    );
  },
  cmpt: function (tileset, tile, resource, arrayBuffer, byteOffset) {
    // Send in the factory in order to avoid a cyclical dependency
    return new Composite3DTileContent(
      tileset,
      tile,
      resource,
      arrayBuffer,
      byteOffset,
      Cesium3DTileContentFactory
    );
  },
  externalTileset: function (tileset, tile, resource, json) {
    return new Tileset3DTileContent(tileset, tile, resource, json);
  },
  geom: function (tileset, tile, resource, arrayBuffer, byteOffset) {
    return new Geometry3DTileContent(
      tileset,
      tile,
      resource,
      arrayBuffer,
      byteOffset
    );
  },
  vctr: function (tileset, tile, resource, arrayBuffer, byteOffset) {
    return new Vector3DTileContent(
      tileset,
      tile,
      resource,
      arrayBuffer,
      byteOffset
    );
  },
  subt: function (tileset, tile, resource, arrayBuffer, byteOffset) {
    return new Implicit3DTileContent(
      tileset,
      tile,
      resource,
      undefined,
      arrayBuffer,
      byteOffset
    );
  },
  subtreeJson: function (tileset, tile, resource, json) {
    return new Implicit3DTileContent(tileset, tile, resource, json);
  },
  glb: function (tileset, tile, resource, arrayBuffer, byteOffset) {
    const arrayBufferByteLength = arrayBuffer.byteLength;
    if (arrayBufferByteLength < 12) {
      throw new RuntimeError("Invalid glb content");
    }
    const dataView = new DataView(arrayBuffer, byteOffset);
    const byteLength = dataView.getUint32(8, true);
    const glb = new Uint8Array(arrayBuffer, byteOffset, byteLength);
    return ModelExperimental3DTileContent.fromGltf(
      tileset,
      tile,
      resource,
      glb
    );
  },
  gltf: function (tileset, tile, resource, json) {
    return ModelExperimental3DTileContent.fromGltf(
      tileset,
      tile,
      resource,
      json
    );
  },
  geoJson: function (tileset, tile, resource, json) {
    return ModelExperimental3DTileContent.fromGeoJson(
      tileset,
      tile,
      resource,
      json
    );
  },
};
export default Cesium3DTileContentFactory;