Regional Density Correction Model for Position Based Fluids

Abstract

There is a position-based fluid simulation method as a method to calculate fine fluids in real time. In this method, incompressibility of the fluid is given as a constraint on density, and the particle position is directly moved so as to satisfy the constraint. Although this method is capable of high speed and stable calculation, it is necessary to perform iterative calculation to satisfy the constraint, which is a problem in terms of calculation cost in real time application. In this paper, we propose a method to maintain incompressibility even with small iterative calculation by setting regional density correction model to complement density constraint. By using the proposed method, it is confirmed that the density can be stabilized more than the conventional method, and incompressibility can be realized with less calculation cost.