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Method for Generation of Solid Models by Sweeping Regions in an Orthographic View

IP.com Disclosure Number: IPCOM000113433D
Original Publication Date: 1994-Aug-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 48K

Publishing Venue

IBM

Related People

Masuda, H: AUTHOR [+2]

Abstract

This article describes a method for generation of solid models from the top view of orthographic projections. This method is intended to transform the projection which has multiple regions into a solid model. A simple solid model which has a single region can be easily generated by sweeping a region shown in Fig. 1. But, generation of the complicated solid model shown in Fig. 2 is impossible for simple sweep operation.

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Method for Generation of Solid Models by Sweeping Regions in an Orthographic
View

      This article describes a method for generation of solid models
from the top view of orthographic projections.  This method is
intended to transform the projection which has multiple regions into
a solid model.  A simple solid model which has a single region can be
easily generated by sweeping a region shown in Fig. 1.  But,
generation of the complicated solid model shown in Fig. 2 is
impossible for simple sweep operation.

      The solid model shown in Fig. 2 is generated by five modules
shown in Fig. 3.  The first module extracts regions enclosed by lines
and circles drawn on an orthographic view.  Fig. 4 shows three
regions extracted from a view.  The second module makes topological
structure by cutting regions apart.  This module converts regions to
suface model representation, shown in Fig. 5.  The third module makes
volumes by sweeping the faces which have thickness independently.  A
volume means 3D region.  By this operation, surface model becomes
non-manifold model with volumes and lamina faces.  Fig. 6 shows that
two faces are swept by 4 and 10 respectively.  The fourth module is
able to modify the thickness of each volume.  Using mouse or dial, an
operator modify the thickness and change the shape interactively.
After the shape is decided, boundary of each volumes are merged and
are generates solid model shown in Fig. 7 by the last module.

      This m...