Fluid-like motion and linear wave propagation behavior will emerge when we impose boundary constraints and polarized conditions on crowds. To this end, we present a Lagrangian hydrodynamics method to simulate the fluidlike motion of crowd and a triggering approach to generate the linear stop-and-go wave behavior. Specifically, we impose a self-propulsion force on the leading agents of the crowd to push the crowd to move forward and introduce a Smoothed Particle Hydrodynamics (SPH) based model to simulate the dynamics of dense crowds. Besides, we present a motion signal propagation approach to trigger the rest of the crowd so that they respond to the immediate leaders linearly, which can lead to the linear stop-and-go wave effect of the fluid-like motion for the crowd. Our experiments demonstrate that our model can simulate large-scale dense crowds with linear wave propagation.

中文翻译：

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基于线性波传播的密集和极化人群仿真模型

当我们对人群施加边界约束和极化条件时，将出现类似流体的运动和线性波传播行为。为此，我们提出了一种拉格朗日流体动力学方法来模拟人群的流体状运动，并提出一种触发方法来生成线性走走停停波行为。具体来说，我们对人群的主要代理施加自推进力以推动人群向前移动，并引入基于平滑粒子流体动力学 (SPH) 的模型来模拟密集人群的动力学。此外，我们提出了一种运动信号传播方法来触发人群的其余部分，以便他们线性地响应直接的领导者，这可以导致人群的流体状运动的线性走走停停波效应。