3D CAD Interface Gesture Recognition Virtual Tabletop
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing 3D CAD systems have a high learning curve and slow usage due to the reliance on mono-functional buttons and fill-in-the-blank fields that do not utilize intuitive analogs of physical objects or the full capabilities of the human hand, resulting in inefficient interaction.
Innovation Solution
A user interface for 3D CAD systems that responds to gestures and poses of both hands, utilizing cooperative and disparate gestures, and incorporating natural analogs from everyday tools and objects to enable more intuitive and efficient interaction, such as using hands to manipulate virtual objects as if they were real, with features like self-alignment and fiducial elements for precise modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mono-functional buttons and fill-in-the-blank fields are used in the UI, then the system structure is simple, but the ease of operation deteriorates and learning curve increases
Solution Approach 1:
The patent applies multi-functionality by enabling the virtual tabletop to serve multiple purposes: it acts as both a workspace for manipulating 3D objects and a control interface for system functions. Users can perform actions like saving, loading, and printing directly through gestures on the tabletop surface, eliminating the need for separate menus and buttons. This integrates multiple functions into a single interactive surface, improving ease of operation while managing complexity through unified interaction.
Solution Approach 2:
The virtual tabletop serves as an intermediary between the user and the CAD system functions. Instead of directly interacting with complex menu systems or command interfaces, users gesture on the tabletop which then mediates these interactions. The tabletop translates simple hand gestures into complex system commands, acting as a mediator that simplifies the user's interaction while maintaining access to full system functionality.
2Productivity
If traditional mouse or stylus is used, then the device complexity is low, but the productivity deteriorates due to limited degrees of freedom
Solution Approach 1:
The patent transitions from two-dimensional mouse or stylus interaction to three-dimensional hand gesture interaction on a virtual tabletop. Users can manipulate objects along all three spatial axes and perform multiple actions simultaneously using different hand positions and gestures. This dimensional expansion allows for more intuitive and efficient control, significantly improving productivity by leveraging the full range of human hand motion capabilities.
Solution Approach 2:
The system allows users to perform multiple functions simultaneously through coordinated two-handed gestures on the tabletop. For example, one hand can constrain an object while the other manipulates it, or one hand can control the object while the other controls the viewpoint. This self-service capability enables complex operations to be performed efficiently without requiring sequential menu selections or tool switching.
3Productivity
If prior art UI elements are used, then the manufacturing precision can be maintained, but the loss of time increases due to slow usage
Solution Approach 1:
The virtual tabletop enables continuous manipulation of 3D objects without interruption by menu systems or command pauses. Users can maintain continuous hand gestures to perform sequences of operations fluidly, such as continuously rotating, scaling, and positioning objects in one uninterrupted interaction flow. This eliminates the start-stop nature of traditional UI interactions, maintaining precision while dramatically reducing the time required to complete design tasks.
4Ease of operation
If intuitive analogs of physical objects are not used, then the device complexity is low, but the ease of operation deteriorates with high learning curve
Solution Approach 1:
The patent creates virtual copies of physical objects and tools within the CAD environment that can be manipulated through natural hand gestures. The virtual tabletop replicates the tactile experience of working with physical objects, allowing users to grasp, rotate, and manipulate virtual 3D models using the same motor skills developed for physical object manipulation. This copying of physical interaction patterns into the digital domain dramatically reduces the learning curve while maintaining intuitive operation.
Data Source
AI summary
A three-dimensional (3D) computer aided design (CAD) user interface (UI) is described that maps both two-handed and one-handed free hand gestures and poses to map to actions in the 3D CAD UI environment. Free hands may be used to directly both constrain and organically modify an object. Intuitive analogs to physical tools are used, with gradual changes to visibility. Parts are automatically modified to meet object-specific and rule-based constraints. Multiple copies of a physical analog element, with known dimensions, may be continually created by a free hand and automatically assembled into an appropriate, organized and contiguous structure containing integral visible fiducials based on the dimensions of the element. Temporary layers of an object are used to permit organic modifications of portions of an object. Use of a fastener creates and then fastens to a mating part. Visible physical analogs provide perspective. Non-linear magnification permits rapid, wide dynamic range object modification.