Patent ID: 8253726
Filing Date: 2012-08-28
Classification: G06F,G06T,G09G

Abstract:
1. A method for modifying the geometry data of a geometry-only format solid boundary representation 3D CAD object through modification of an arbitrary cross section, the solid boundary representation 3D CAD object being stored within a computer aided design modeling system without related history information, the method comprising: (a) displaying a plurality of solid boundary representation 3D CAD objects, each with a corresponding position and orientation within the three dimensional modeling space of the computer aided design modeling system, and displayed within a graphical user interface of the computer aided design modeling system; (b) receiving, from a user of the computer aided design modeling system, the position and orientation of a cross section plane within the three dimensional modeling space of the computer aided design modeling system, the cross section plane being arbitrarily positioned relative to the orientation of one of the solid boundary representation 3D CAD objects, and wherein the arbitrarily positioned and oriented plane is intersecting the solid boundary representation 3D CAD object; (c) the computer aided design modeling system generating a user modifiable two dimensional cross section from the intersection of the cross section plane and the solid boundary representation 3D CAD object, wherein the cross section plane is arbitrarily positioned and oriented relative to the solid boundary representation 3D CAD object, and wherein the generated two dimensional cross section comprises a plurality of user modifiable control elements; (d) receiving a modification to at least one of the user modifiable control elements, and making a corresponding modification to the two dimensional cross section in response to the modification to the control element; and (e) updating the geometry data of the solid boundary representation 3D CAD object such that changes to the two dimensional cross section are reflected in the updated geometry of the solid boundary representation 3D CAD object, and performing such updates without recording history information.