3D Stroke-Based Modeling Method for Reducing Computational Overhead
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Solution Overview
Problem
Current methods for designing three-dimensional modeled objects are inefficient due to the lack of integration between sketch and tracer steps, requiring heavy computing resources and relying on 2D imports, which limits productivity and flexibility.
Innovation Solution
A computer-implemented method that allows users to interact with a screen to define strokes, discretize them into points, project these points onto a three-dimensional scene, and construct the object, reducing computational resources and enabling faster creation of complex models.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If 2D drawings are imported and geometrical curves are inferred from them, then the design process can proceed, but heavy computing resources are required for computing the geometrical curves
Solution Approach 1:
The patent transitions from 2D drawing imports to direct 3D freeform stroke input. Users draw strokes directly in 3D space, and the system constructs 3D polygonal surface models directly from these strokes, eliminating the need for 2D-to-3D conversion computations and reducing computational resource requirements
Solution Approach 2:
The patent extracts only the essential silhouette information through freeform strokes, removing the unnecessary intermediate step of importing and processing complete 2D drawings. The system takes out only the critical shape-defining elements needed for 3D model construction
2Ease of operation
If sketch is performed on paper and then imported to software, then the creative phase is separated, but the sketch and tracer steps are not integrated
Solution Approach 1:
The patent merges the sketching and tracing steps into a single integrated process. Users perform freeform strokes directly in the 3D modeling environment, and the system automatically constructs the 3D model from these strokes, eliminating the need for separate paper sketching and software tracing phases
Solution Approach 2:
The system provides automatic 3D model construction from user strokes without requiring manual intervention for curve inference or surface generation. The computational process serves itself by automatically converting strokes to 3D models, reducing the need for complex user-guided processing steps
3Manufacturing precision
If multiple computations are required for computing geometrical curves from 2D drawings, then accurate 3D models can be created, but productivity is reduced due to heavy computing resources
Solution Approach 1:
The patent skips the computationally intensive intermediate steps of 2D drawing import, curve inference, and surface computation. Users draw strokes directly in 3D space, and the system rapidly constructs 3D models through simplified algorithms, significantly reducing computation time while maintaining model accuracy
Solution Approach 2:
The patent replaces the traditional mechanical process of 2D-to-3D conversion with a direct 3D stroke-based modeling approach. The computational mechanism is substituted from complex curve-fitting algorithms to simpler polygonal surface construction from stroke points, reducing computational overhead
Data Source
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AI summary
It is proposed a computer-implemented method for designing a three-dimensional modeled object, wherein the method comprises the steps of: - user-interacting (S100) with a screen; - defining a stroke (S110) corresponding to the user-interacting; - discretizing the stroke (S120) into a set of points; - projecting the set of points (S130) onto at least one support in a three-dimensional scene; - constructing the three-dimensional modeled object (S140) from the projected set of points and the said at least one support.