Parametric 3D Roof Modeling System for Efficient Geometry Editing
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Solution Overview
Problem
Existing computer-aided design (CAD) systems struggle to efficiently and accurately manipulate and edit 3D models of roof structures, leading to tedious and difficult maintenance of constrained and cohesive models.
Innovation Solution
The system employs a two-phase processing method to parameterize 3D roof models. The first phase receives input parameters for roof components, processes them through an algorithm to generate 3D polyhedrons, and combines these to form a 3D roof geometry. The second phase defines the exterior contour, surfaces, and user-defined actions within the roof structure, ensuring geometric constraints and cohesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual manipulation of 3D roof structure is performed, then initial creation of roof geometry can be done quickly, but maintenance and editing becomes tedious and difficult
Solution Approach 1:
The patent implements a parametric modeling system where roof geometry is defined by adjustable parameters rather than fixed manual coordinates. Users can dynamically modify roof characteristics (pitch, span, overhangs) by changing parameter values, and the system automatically regenerates the 3D model to reflect these changes, transforming static manual manipulation into dynamic parameter-driven editing.
Solution Approach 2:
The system represents roof structures using a set of defining parameters (e.g., ridge height, eave locations, slope angles) that control the geometric configuration. By parameterizing the model, users can efficiently edit the roof structure by modifying these parameters through algebraic operations, avoiding tedious point-by-point manual adjustments while maintaining geometric constraints.
2Ease of operation
If parameterization is implemented to improve editing capability, then model manipulation becomes easier and faster, but system complexity increases
Solution Approach 1:
The patent divides the roof modeling system into distinct functional modules: parameter definition module, constraint management module, and geometry generation module. Each module handles specific aspects of the parametric process, allowing independent development and maintenance of complex functions while presenting a simplified interface to users.
Solution Approach 2:
The system introduces an intermediate parametric representation layer between user input and final geometry generation. This intermediary layer processes parameter changes through algebraic operations and constraint satisfaction algorithms, shielding users from the underlying computational complexity while enabling powerful editing capabilities.
3Stability of the object's composition
If algebraic operations are used to maintain geometric constraints, then model cohesion is improved, but computational time increases
Solution Approach 1:
The patent pre-computes and stores the algebraic relationships between geometric parameters and constraint equations during model initialization. When edits are made, the system performs incremental updates using these pre-established relationships rather than recalculating all constraints from scratch, significantly reducing computational time while maintaining geometric integrity.
Solution Approach 2:
The system replaces traditional geometric constraint solving methods with algebraic operation-based approaches. By formulating geometric constraints as algebraic equations that can be systematically solved and updated, the system achieves more efficient computation compared to iterative geometric algorithms, balancing constraint maintenance with computational performance.
Data Source
AI summary
A system and method for generating a parametric model of a roof structure comprising a processor in communication with a memory. The system receives a plurality of parameters of each roof component composing the roof structure and performs a geometry creation based on the received plurality of parameters. The system generates a constrained three-dimensional geometry based on an output of the geometry creation, and displays a three-dimensional model of the roof structure based on the constrained three-dimensional geometry.