Method OpenModelFromCallback

src/ts/web-ifc-api.ts:511–538

* Opens a model and returns a modelID number * @param callback a function of signature (offset:number, size: number) => Uint8Array that will retrieve the IFC data * @param settings Settings for loading the model @see LoaderSettings * @returns ModelID or -1 if model fails to open

(
    callback: ModelLoadCallback,
    settings?: LoaderSettings
  )

   * @returns ModelID or -1 if model fails to open
   */
  OpenModelFromCallback(
    callback: ModelLoadCallback,
    settings?: LoaderSettings
  ): number {
    let s = this.CreateSettings(settings);
    let result = this.wasmModule.OpenModel(
      s,
      (destPtr: number, offsetInSrc: number, destSize: number) => {
        let data = callback(offsetInSrc, destSize);
        let srcSize = Math.min(data.byteLength, destSize);
        let dest = this.wasmModule.HEAPU8.subarray(destPtr, destPtr + srcSize);
        dest.set(data);
        return srcSize;
      }
    );
    this.deletedLines.set(result, new Set());
    var schemaName = this.GetHeaderLine(result, FILE_SCHEMA).arguments[0][0]
      .value;
    this.modelSchemaList[result] = this.LookupSchemaId(schemaName);
    this.modelSchemaNameList[result] = schemaName;
    if (this.modelSchemaList[result] == -1) {
      Log.error("Unsupported Schema:" + schemaName);
      this.CloseModel(result);
      return -1;
    }
    Log.debug("Parsing Model using " + schemaName + " Schema");
    return result;
  }

  /**
   * Fetches the ifc schema version of a given model