CAD Wall Drawing via Sector-Based Pivot Regions
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Solution Overview
Problem
Existing CAD systems require multiple sequential steps to model connected three-dimensional walls and corresponding slabs, lacking direct modeling capabilities for 3D spaces and automatic wall connection determination.
Innovation Solution
A computer-implemented method, system, and program product that allows simultaneous selection of drawing operations and dimensions via a user input device, enabling direct modeling of multiple connected three-dimensional walls and slabs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple sequential commands are used to create walls and slabs in CAD, then modeling precision is maintained, but the number of user operations and time required increases significantly
Solution Approach 1:
The patent combines multiple sequential CAD commands (PLINE, POLYSOLID, EXTRUDE, BIMCONNECT) into a single integrated wall drawing operation. The system processes wall outline definition, 3D wall generation, and automatic connection establishment in one unified command execution, eliminating the need for separate sequential operations while maintaining modeling precision.
Solution Approach 2:
The system performs preliminary actions by automatically determining wall connections and generating 3D wall structures before the user completes the drawing operation. The automatic connection determination occurs during the wall drawing process itself, rather than requiring subsequent separate connection operations.
2Adaptability or versatility
If traditional CAD commands are used for wall creation, then compatibility with existing systems is maintained, but device complexity and ease of operation deteriorate due to multiple sequential steps
Solution Approach 1:
The patent implements a universal wall drawing command that performs multiple functions: defining wall outlines in 2D, generating 3D wall structures with automatic thickness application, determining connections between walls, and creating associated slabs. This single multi-functional command replaces multiple specialized commands while maintaining compatibility with existing CAD system architectures.
Solution Approach 2:
The system provides self-service by automatically determining wall connections based on the drawn outline without requiring explicit user specification. The connection determination algorithm automatically identifies which walls should be connected and establishes the connections, eliminating the need for separate connection commands and reducing operational complexity.
3Reliability
If step-by-step wall modeling is performed, then control over each element is maintained, but productivity decreases due to the plurality of sequential steps
Solution Approach 1:
The patent enables continuous useful action by allowing the wall drawing operation to proceed in a single continuous process. The user defines the wall outline continuously, and the system continuously generates 3D wall structures and establishes connections throughout the drawing process, rather than pausing between separate operations for wall creation and connection establishment.
Solution Approach 2:
The system segments the wall modeling process into automatic sub-tasks (outline processing, 3D generation, connection determination) that execute automatically during a single user operation. This segmentation occurs internally within the unified command, maintaining element control through automated processing while improving productivity by eliminating manual intervention between steps.
Data Source
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AI summary
The present invention concerns a computer-implemented method, a computer system and a computer program product for wall drawing in a CAD model. The CAD model comprises a height direction. A polygonal pivot region is obtained in a plane perpendicular to the height direction. The polygonal pivot region comprises multiple outer edges each defining a line. These lines partition the plane into multiple sectors. Each sector is associated with a drawing operation. A position in a sector of the plane is obtained via a user input device. The drawing operation associated with this sector is automatically performed. The drawing operation comprises inserting, removing and/or repositioning one or more walls and/or wall portions, each extending in the height direction and comprising a length perpendicular to the height direction based on said position.