API Reference > geometry-core > Serialization > IModelJson > IModelJson.BoxProps IModelJson.BoxProps Interface Interface for Box (or frustum with all rectangular sections parallel to primary xy section) Orientation may be given in any AxesProps way (yawPitchRoll, xyVectors, zxVectors) if topX or topY are omitted, each defaults to its baseX or baseY peer. topOrigin is determined with this priority order: topOrigin overrides given height on the z axis at distance height If both topOrigin and height are omitted, height defaults to baseX Extends IModelJson.AxesProps Properties Name Type Description baseX number base x size (required) baseY number base size capped undefined | boolean optional capping flag. height undefined | number optional height. origin XYZProps Origin of the box coordinate system (required) topOrigin undefined | XYZProps top origin. topX undefined | number x size on top section. topY undefined | number y size on top section. Inherited properties Name Type Inherited from Description xyVectors undefined | [XYZProps, XYZProps] IModelJson.AxesProps Cartesian coordinate directions defined by X direction then Y direction. yawPitchRollAngles undefined | YawPitchRollProps IModelJson.AxesProps See YawPitchAngles class for further information about using 3 rotations to specify orientation. zxVectors undefined | [XYZProps, XYZProps] IModelJson.AxesProps Cartesian coordinate directions defined by X direction then Y direction. Defined in serialization/IModelJsonSchema.ts Line 397 Last Updated: 11 June, 2024