Abstract
It is urgent to improve the physical reality of ocean scenes in marine simulator for the maritime industry. In this paper, we propose a unified anisotropic particle-based ocean wave simulation framework for marine simulator. In the unified framework, a novel hybrid SPH method is applied to model the ocean waves, which combines a series of nonlinear density constraints and divergence-free velocity field constraints. By solving density constraints, the particle position distribution is directly adjusted to keep a constant density. Experiments show that the hybrid SPH method has advantages in compressibility and stability. Moreover, a novel stochastic fluctuating wind field model is integrated into the hybrid SPH method. The Perlin noise and a modified log wind profile are introduced to enrich the details of wind field. We also introduce a novel oil spill model for marine simulator based on number density, which can achieve a desired sharp density changes at interfaces between multiple fluids. For real-time surface reconstruction, we propose an improved anisotropic particle transformation method based on the distribution of the neighboring particles. The problem of particle deformation near the boundary is solved by our piecewise correction function, with the sharp features and anisotropy maintained. When calculating the covariance matrix and weighted position, the contribution of neighboring particles in other fluid phases is considered to eliminate gaps between multiple fluids in the oil spill scenes. The simulation results show that our unified anisotropic framework based on the SPH concept can easily integrate other models, has strong expansibility, and is very applicable to simulate complex ocean scenes.
Highlights
Particle-based ocean wave simulation is one of the most challenging research topics in computer graphics
The framework is mainly composed of an ocean wave motion model based on hybrid Smoothed Particle Hydrodynamics (SPH), a stochastic fluctuating wind field based on Perlin noise, and an oil spill model based on particle number density and an anisotropic particle transformation technology
The stochastic fluctuating wind field model is developed based on the wind profile and Perlin noise, and can be integrated into the proposed hybrid SPH model, which is of great significance for the simulation of heavy wind wave scenes in marine simulator
Summary
Particle-based ocean wave simulation is one of the most challenging research topics in computer graphics. H. Li et al.: Unified Anisotropic Particle-Based Ocean Wave Simulation Framework for Marine Simulator Visual System are statistical models. Li et al.: Unified Anisotropic Particle-Based Ocean Wave Simulation Framework for Marine Simulator Visual System are statistical models They have high visual realism, they lack physical basis and have poor expansibility. Introducing the SPH method into the marine simulator for simulating the ocean scenes can greatly improve the physical reality of the visual system. In order to further improve the performance of the algorithm and provide an effective solution for the physics-based complex ocean wave scenes in marine simulator visual system, in this paper, we propose a unified anisotropic particle-based simulation framework for common ocean wave scenes. The detailed contributions are as follows: In order to enforce incompressibility, we propose a novel hybrid SPH framework to discretize the governing equations of ocean waves. The anisotropic particle framework maintains sharper features in the splashing area, and provides a better solution for smooth screen space fluid surface rendering
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.