Interaction Engine for Realistic VR Hand-Object Physics
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Solution Overview
Problem
Conventional virtual reality (VR) and augmented reality (AR) systems lack realism in interactions between virtual objects and hands, often resulting in unrealistic outcomes such as objects shattering or flying away when grasped.
Innovation Solution
The implementation of a real-time physics engine (RTPE) that simulates rigid bodies and applies a novel one-dimensional friction response during soft contact collisions, allowing for realistic interaction between virtual objects and hands by prioritizing physical integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional physics simulation is used in VR/AR systems, then computational speed is maintained, but interaction realism deteriorates (objects shatter or fly away when grasped)
Solution Approach 1:
The patent segments the physics simulation into two distinct phases: a first simulation phase that includes hand-object interactions with soft contact collisions, and a second simulation phase that excludes hand effects. This segmentation allows each phase to be optimized independently, resolving the contradiction between realism and complexity by handling different aspects of simulation separately rather than as a monolithic system
Solution Approach 2:
The patent introduces an integration phase that acts as an intermediary between the two simulation phases. This integration phase combines results from both simulations while prioritizing the second solution (without hand effects) to maintain stability. The intermediary integration mechanism reconciles the realistic hand interactions from the first phase with the stable global physics state from the second phase, achieving both realism and computational reliability
2Reliability
If soft contact collision with friction response is applied, then interaction realism is improved, but computational precision requirements increase
Solution Approach 1:
The patent applies dynamic friction response that adapts based on the collision state. The friction magnitude is determined dynamically during the soft contact collision between hand and virtual object, allowing the simulation to maintain physical integrity without requiring excessive precision throughout the entire simulation. The dynamic adjustment of friction parameters resolves the contradiction by applying precision only where needed
Solution Approach 2:
The patent changes simulation parameters selectively during different phases. During the first simulation phase, soft contact collision parameters with friction are enabled to achieve realistic hand-object interaction. During the second simulation phase, these parameters are adjusted or disabled to maintain global stability. This selective parameter changing allows the system to achieve both realism and computational feasibility
Data Source
AI summary
The technology disclosed relates to a method of realistic simulation of real world interactions as virtual interactions between a control object sensed acting in a three-dimensional (3D) sensory space and the virtual object in a virtual space that the control object interacts with. In particular, it relates to detecting free-form gestures of a control object in a three-dimensional (3D) sensory space and generating for display a 3D solid control object model for the control object during the free-form gestures, including sub-components of the control object and in response to detecting a free-form gesture of the control object in the 3D sensory space in virtual contact with the virtual object, depicting, in the generated display, the virtual contact and resulting motions of the virtual object by the 3D solid control object model.