Virtual Object Weight Simulation Using Spring Dynamics
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Solution Overview
Problem
Conventional virtual object implementations in artificial reality lack realistic weight simulation, leading to a lack of intuitive user interaction experiences.
Innovation Solution
A spring dynamics model is employed to simulate weight for virtual objects, controlling their movement and rotation relative to user interactions, using tunable parameters such as spring coefficients, damper forces, and center of mass to create a lagging effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional virtual object implementations are used in artificial reality, then the system remains simple and computationally efficient, but the user interaction lacks realistic weight simulation and intuitive feel
Solution Approach 1:
The patent introduces a weight simulation model as an intermediary layer between the user input system and the virtual object rendering system. This model acts as a mediator that processes user interactions and adds realistic weight effects without requiring fundamental changes to the underlying artificial reality platform architecture.
Solution Approach 2:
The patent implements weight simulation by dynamically adjusting parameters such as spring constants, damping coefficients, and mass values in the virtual object model. These parameter changes allow the system to simulate different weight characteristics for various objects while maintaining a unified simulation framework.
2Reliability
If a spring dynamics model with multiple parameters is implemented to simulate weight, then interaction realism is improved, but computational resources and processing time increase
Solution Approach 1:
The patent employs dynamic simulation models that adjust computational effort based on the specific interaction context. The spring-damper-mass system is solved using efficient numerical methods that adapt the calculation precision and iteration count based on the object's mass and the user interaction intensity, reducing unnecessary computational overhead.
Solution Approach 2:
The implementation uses approximate solutions for the spring dynamics equations that provide sufficient realism for most interactions without calculating every physical detail with maximum precision. The simulation applies appropriate levels of computational detail based on the specific interaction scenario, avoiding excessive calculation for cases where high precision is not critical.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances the user experience by providing a more realistic feel of weight in virtual object interactions, allowing for varied simulations based on object shape, size, and weight, thereby improving interaction realism.
Implementation Method 1
a spring dynamics model may take, as input, the user movement and control the virtual object movement using outputs from the spring dynamics model
Implementation Method 2
tunable parameters such as spring coefficients, damper forces, and center of mass
Data Source
AI summary
Aspects of the present disclosure are directed to simulating weight for a virtual object in artificial reality. Implementations of a weight simulator can simulate weight for a virtual object during interactions with a user in an artificial reality environment. For example, when a user picks up a virtual object with simulated weight, a spring dynamics model may take, as input, the user movement (e.g., had movement while grasping the virtual object) and control the virtual object movement using outputs from the spring dynamics model. The spring dynamics model's control of the virtual object's movement can give the appearance of lag relative to the user's movements. For example, the user may pick up and move the virtual object, and the virtual object may lag (e.g., behind and/or in a rotation) relative the user's hand movements, as if the user's hand and virtual object were connected by one or more virtual springs.