Haptic Rendering via Graphics Pipeline Data Repurposing
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Solution Overview
Problem
Current haptic rendering systems are inefficient and incompatible with 3D graphics applications, limiting processing speeds and realism in virtual environments, as they process haptic data separately from graphical data and are not designed to interpret or provide haptic information.
Innovation Solution
The method involves repurposing graphical data from the graphics pipeline for haptic rendering, allowing integration of haptic functionality into 3D graphics applications, using APIs to access and interpret data from buffers like depth, feedback, and texture maps for enhanced force feedback and interaction techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If haptic rendering is processed separately from graphical rendering, then haptic systems can maintain independent control, but processing efficiency decreases and compatibility with 3D graphics applications is limited
Solution Approach 1:
The patent merges haptic rendering with graphical rendering by integrating haptic data processing into the graphics pipeline. The system uses the same 3D scene data, geometry, and rendering calculations that graphical systems already perform to generate haptic feedback, eliminating the need for separate haptic processing and improving overall efficiency.
Solution Approach 2:
The patent makes the graphics pipeline multi-functional by enabling it to serve both graphical rendering and haptic rendering purposes. The same data structures, geometry processing, and rendering calculations are used to generate both visual and haptic outputs, allowing a single system to perform multiple functions without requiring dedicated separate processing paths.
2Measurement precision
If haptic rendering uses dedicated processing, then haptic feedback accuracy is maintained, but processing speed decreases and latency increases
Solution Approach 1:
The patent performs haptic rendering calculations in advance during the graphical rendering process. By computing haptic data alongside graphical data before final output, the system prepares haptic feedback information ahead of time, reducing real-time processing requirements and latency while maintaining accuracy through pre-computed precise calculations.
3Reliability
If haptic systems are designed independently, then haptic control is precise, but adaptability to 3D graphics applications is reduced
Solution Approach 1:
The patent enables the graphics pipeline to serve both graphical and haptic rendering functions, making the system adaptable to various 3D graphics applications while maintaining haptic control precision. The unified approach allows seamless integration with different 3D applications using standard graphics APIs.
Solution Approach 2:
The patent introduces an intermediary layer that bridges haptic rendering with the graphics pipeline. This intermediary component translates and adapts graphical rendering data into haptic feedback data, enabling precise haptic control while maintaining compatibility with diverse 3D graphics applications through a standardized interface.
4Reliability
If separate haptic processing is used, then haptic rendering can be optimized independently, but device complexity increases
Solution Approach 1:
The patent combines haptic rendering optimization within the existing graphics pipeline architecture, eliminating the need for separate dedicated haptic processing hardware or software systems. This integration reduces overall system complexity while maintaining the ability to optimize haptic rendering through the established graphics processing infrastructure.
Data Source
AI summary
The invention provides methods for leveraging data in the graphics pipeline of a 3D graphics application for use in a haptic rendering of a virtual environment. The invention provides methods for repurposing graphical information for haptic rendering. Thus, at least part of the work that would have been performed by a haptic rendering process to provide touch feedback to a user is obviated by work performed by the graphical rendering process.