Abstract: A set of two-dimensional layers is determined based on a digital three-dimensional model. An image corresponding to each of the layers is rendered on each of a corresponding number of sheets of at least partially transparent material. The sheets of material are assembled together to produce a three-dimensional structure corresponding to the digital model.

Abstract: A set of two-dimensional layers is determined based on a digital three-dimensional model. An image corresponding to each of the layers is rendered on each of a corresponding number of sheets of at least partially transparent material. The sheets of material are assembled together to produce a three-dimensional structure corresponding to the digital model.

Abstract: Deforming a three-dimensional computer-generated model to cause a change of shape of the three-dimensional model includes representing a surface of the model using a surface representation initially comprised of an original surface definition, deriving smooth three-dimensional mapping functions where each mapping function defines a deformation to the surface and at least one mapping function is non-affine, constructing a composition of the mapping functions and the original surface definition where each mapping function is included in the composition in succession in accordance with the order of derivation, and applying the composition after each successive mapping function is included in the composition causing the surface of the three-dimensional model to be deformed while preserving the smoothness to the lowest degree of smoothness of the mapping functions.

Abstract: Provided herein is a computer-based system for viewing a two-dimensional electronic drawing, including processes for pointing to similar components in different views, animation of views, hyperlinking components between views and virtual folding of an electronic drawing.

Abstract: Modeling of a three-dimensional object includes storing data representing a computer model of the three-dimensional object. The data includes a number of feature objects each of which defines a feature of the computer model. A feature chain is formed and includes at least one feature object having a design effect limited in scope such that an operation for removing material operates to affect the feature of the computer model defined by another feature object in the same feature chain and does not affect the feature of the computer model defined by the feature object not in said same feature chain. Multiple feature chains can be combined to form an interrelationship among feature objects that represents a hierarchy defining construction of the model from the feature objects.

Abstract: Provided herein is a computer-based system for viewing a two-dimensional electronic drawing, including processes for pointing to similar components in different views, animation of views, hyperlinking components between views and virtual folding of an electronic drawing.

Abstract: Deforming a three-dimensional computer-generated model to cause a change of shape of the three-dimensional model includes representing a surface of the model using a surface representation initially comprised of an original surface definition, deriving smooth three-dimensional mapping functions where each mapping function defines a deformation to the surface and at least one mapping function is non-affine, constructing a composition of the mapping functions and the original surface definition where each mapping function is included in the composition in succession in accordance with the order of derivation, and applying the composition after each successive mapping function is included in the composition causing the surface of the three-dimensional model to be deformed while preserving the smoothness to the lowest degree of smoothness of the mapping functions.

Abstract: Provided herein is a computer-based system for viewing a two-dimensional electronic drawing, including processes for pointing to similar components in different views, animation of views, hyperlinking components between views and virtual folding of an electronic drawing.

Abstract: Processing data objects of a two-dimensional drawing includes marking data objects corresponding to annotation, separating the drawing into a plurality of views, and associating each of the data objects corresponding to annotation with one of the views. Separating the drawing into a plurality of views may include constructing a plurality of intersection and proximity graphs and using the graphs to provide a plurality of connected sets, where each set may correspond to one of the views. The border views may be identified by determining which of the views include less than a predetermined number of elements, contain at least two other views, and are not contained in other views.

Abstract: Modeling of a three-dimensional object includes storing data representing a computer model of the three-dimensional object. The data includes a number of feature objects each of which defines a feature of the computer model. A feature chain is formed and includes at least one feature object having a design effect limited in scope such that an operation for removing material operates to affect the feature of the computer model defined by another feature object in the same feature chain and does not affect the feature of the computer model defined by the feature object not in said same feature chain. Multiple feature chains can be combined to form an interrelationship among feature objects that represents a hierarchy defining construction of the model from the feature objects.