Polygonal Data Vertex Modification for Subdivision Conformity
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Solution Overview
Problem
The difference between the surface defined by higher resolution polygonal data and lower resolution polygonal data generated through subdivision or smoothing operations can be problematic, leading to inconsistencies in graphical design processes.
Innovation Solution
A method that modifies the position characteristics of source vertices in a polygonal data model to ensure that the subdivided data conforms to a reference geometry, using modification vectors to iteratively adjust vertex positions until desired conformity is achieved, thereby generating a design that aligns with the reference topology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If subdivision or smoothing operation is performed to generate higher resolution polygonal data, then resolution is improved, but the difference between the surface defined by higher resolution polygonal data and lower resolution polygonal data becomes problematic
Solution Approach 1:
The patent modifies the position characteristics of source vertices before performing the subdivision operation. By pre-adjusting the source vertices based on the reference geometry, the subsequent subdivision produces higher resolution data that conforms to the desired surface, preventing the surface deviation problem that would otherwise occur after subdivision
Solution Approach 2:
The patent changes the position characteristics (parameters) of the source vertices to ensure that after subdivision, the generated higher resolution polygonal data conforms to the reference geometry. This parameter modification approach allows the subdivision process to maintain both high resolution and surface conformity
2Manufacturing precision
If source vertices are modified to ensure conformity after subdivision, then surface conformity is improved, but the complexity of the design process increases
Solution Approach 1:
The modification of source vertex positions is performed as a preliminary step before subdivision, integrating the conformity requirement into the source model preparation phase. This approach consolidates multiple adjustments into a single pre-processing operation, making the overall process more manageable despite the added complexity
Solution Approach 2:
The patent uses the reference geometry as a feedback target to guide the modification of source vertex positions. By continuously referencing the desired geometry during the vertex modification process, the system automatically adjusts vertices to achieve conformity, reducing the need for manual iterative adjustments and simplifying the overall workflow
Data Source
AI summary
A method of generating a design for a device is disclosed. The method includes electronically accessing a reference geometry representing the topology, and electronically accessing a source polygonal data model, where the source polygonal data model includes a plurality of source vertices. The method also includes modifying position characteristics of one or more of the source vertices, where the source vertices are modified so that after the source polygonal data model is subdivided, vertices in the subdivided polygonal data model corresponding with the modified source vertices conform to the reference geometry. The method also includes subdividing the source polygonal data model having the modified source vertices to generate the design, where subdividing the source polygonal data model causes vertices in the design to be positioned such that the design conforms with the reference geometry at least partly because of the modified position characteristics of the modified source vertices.