Selective quantity takeoff from computer aided design drawings

摘要

One embodiment of the invention sets forth a CAD application configured to perform quantity takeoff computations. The CAD application is further configured to organize a CAD drawing into a hierarchical representation of object families and associated object types, where instances of the object types represent drawing objects present in the CAD drawing. The CAD application is further configured to receive a selection of an object family and to parse the selection to determine the object types associated with the selection. The CAD application then creates a takeoff object for each of the object types associated with the selection and identifies instances, associated with object properties, of each of the object types of the selection. The CAD application quantifies the instances and associated properties to produce a quantity takeoff value. Advantageously, users are able to more quickly and easily estimate the cost of a design project associated with the CAD drawing.

主权项

1. A method for performing a quantity takeoff computation, the method comprising:
organizing a CAD drawing into a hierarchical representation that includes at least one object family associated with a plurality of object types, wherein each object family corresponds to a different object, each of the plurality of object types corresponds to a different variation of the different object, and each instance of each object type associated with an object family represents a drawing object present in the CAD drawing; receiving a selection of a first object family; parsing the first object family to determine the plurality of object types associated with the first object family; creating a takeoff object for each of the plurality of object types associated with the first object family; identifying, via a processor, instances of each of the plurality of object types associated with the first object family, wherein each instance is associated with one or more object properties and is identified by a different instance globally unique identifier (GUID); and quantifying the instances and the one or more object properties associated with each instance to produce a quantity takeoff value.