Real-Time Cloth Simulation on Virtual Human Character Using Enhanced Position Based Dynamic Framework Technique

Abstract

Cloth simulation and animation has been the topic of research since the mid-80's in the field of computer graphics. Enforcing incompressible is very important in real time simulation. Although, there are great achievements in this regard, it still suffers from unnecessary time consumption in certain steps that is common in real time applications. This research develops a real-time cloth simulator for a virtual human character (VHC) with wearable clothing. This research achieves success in cloth simulation on the VHC through enhancing the position-based dynamics (PBD) framework by computing a series of positional constraints which implement constant densities. Also, the self-collision and collision with moving capsules is implemented to achieve realistic behavior cloth modelled on animated characters. This is to enable comparable incompressibility and convergence to raised cosine deformation (RCD) function solvers. On implementation, this research achieves optimized collision between clothes, syncing of the animation with the cloth simulation and setting the properties of the cloth to get the best results possible. Therefore, a real-time cloth simulation, with believable output, on animated VHC is achieved. This research perceives our proposed method can serve as a completion to the game assets clothing pipeline.

State‐of‐the‐art improvements and applications of position based dynamics

“…Cloth simulation is the cradle of position based methods as the pioneer demonstrations are all applied on cloth. Its high‐quality performance on cloth has been well proven in References 30,31. However, it was later found that PBH, 34 integrating with SPH, 32 could also have visual plausibility in fluid simulation while inheriting the advantages of PBD 34–36 .…”

“…Bender et al introduced another isometric bending constraint for inextensible surfaces in Reference 30, which is suitable for garment simulation. By applying additional positional constraints to represent constant densities in the PBD solver, Ali et al proposed a real‐time cloth simulation method in Reference 31, which generates different wind effects of cloth, tackling the problem of dynamically preserving cloth overlays and wrinkles. Other collision constraints like self‐collisions within cloth, cloth balloons, and strain energy constraints are applied in different scenarios to simulate different cloth conditions.…”

Clarifying Optimum Setting Temperatures and Airflow Positions for Personal Air Conditioning System on Flight

“…The demand for the airline industry has increased regardless of age with globalization. Accordingly, the number of tourists has been increasing 1 . However, the limited space of an airplane could be factors of various kinds of stress [2][3][4] .…”