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Controllable local monotonic cubic interpolation in fluid animations

机译:流体动画中可控的局部单调三次插值

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摘要

While linear interpolation has been used frequently in computer graphics, higher-order interpolation is often desirable in applications requiring higher-order accuracy. In this paper, we study how interpolation filters, employed to resample such data as velocity, density, and temperature in simulating the equations of fluid dynamics, affect the animation of fluids. For this purpose, we have designed a controllable local cubic interpolation scheme that offers G~1 (or C~1) continuity globally. It is based on monotonic splines so does not suffer from undue overshooting. Furthermore, it is possible to control the general behavior of the interpolation through a global tension parameter, providing a continuous spectrum of linear to cubic interpolation. We analyze how this controllable interpolation filter may be effectively used to enhance the visual reality for physically based fluid animation.
机译:尽管线性插值已在计算机图形学中频繁使用,但在需要更高阶精度的应用中通常需要更高阶插值。在本文中,我们研究了插值滤波器在模拟流体动力学方程时如何对速度,密度和温度等数据进行重采样,从而影响流体的动画效果。为此,我们设计了一种可控的局部三次插值方案,该方案可全局提供G〜1(或C〜1)连续性。它基于单调样条曲线,因此不会遭受过度的过冲。此外,可以通过全局张力参数控制插值的一般行为,从而提供线性到三次插值的连续频谱。我们分析了可控插值滤波器如何有效地用于增强基于物理的流体动画的视觉现实。

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