Deformation Joint for XR Mesh Distortion Control
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Solution Overview
Problem
Existing extended reality (XR) systems cause undesirable distortions in XR objects when manipulating them, leading to mesh edge lines losing their rest state and forming undesirable arcs during movements.
Innovation Solution
The introduction of a deformation joint positioned away from the XR object's skeleton, which is activated to modify the display and restore the mesh to a rest state by relaxing the mesh and adjusting the arc characteristics to satisfy threshold values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional skeletal joints are used for XR object manipulation, then the object can move and transform, but the mesh edge lines lose their rest state and form undesirable arcs causing visual distortions
Solution Approach 1:
A deformation joint is introduced as an intermediary element between the skeleton joint and the mesh portions. This deformation joint acts as a mediator that controls the transition of mesh portions while preserving their rest state characteristics, preventing the formation of undesirable arcs during XR object manipulation.
Solution Approach 2:
The joint structure is segmented into multiple components: a skeleton joint for primary manipulation and a separate deformation joint for maintaining mesh integrity. This segmentation allows independent control of manipulation functionality and visual fidelity, resolving the contradiction between adaptability and precision.
2Manufacturing precision
If the mesh is relaxed to restore rest state, then visual fidelity improves, but the complexity of the joint structure increases
Solution Approach 1:
The deformation joint applies local quality control by specifically targeting the mesh portions that need to maintain their rest state. Rather than complicating the entire joint structure, the solution introduces a focused deformation control mechanism that operates locally at the mesh-skeleton interface, preserving visual fidelity without excessive complexity.
3Manufacturing precision
If deformation joint is positioned at a distance from the skeleton, then mesh distortion is prevented, but the distance parameter must be precisely controlled as a function of mesh portions and joint telemetry
Solution Approach 1:
The deformation joint positioning utilizes feedback from joint telemetry data and mesh portion characteristics. The distance of the deformation joint from the skeleton is dynamically determined based on measured parameters, creating a feedback loop that ensures optimal positioning for distortion prevention while accounting for variations in the XR object geometry.
Data Source
AI summary
In some implementations, a method includes obtaining a first mesh portion and a second mesh portion associated with a skeleton of an object. The first mesh portion and the second mesh portion meet at a skeletal joint that is located on the skeleton. It is detected that a combination of the first mesh portion and the second mesh portion satisfies a joint telemetry criterion. A deformation joint is associated with at least one of the first mesh portion or the second mesh portion. The deformation joint is positioned at a distance away from the skeleton. The deformation joint has a flexion that is a function of the first mesh portion, the second mesh portion and the joint telemetry criterion. A display of the object is modified after associating the deformation joint with the at least one of the first mesh portion or the second mesh portion.