Dynamic Fluids Mixed with Local-Control Effects

In dynamic fluid simulation, the user often need to control the local regions of the entire fluid scene for the special design effects, such as flowing marks and icons in dynamic fluids. Currently, the research aimed at such an issue is rare. It is rather difficult to realize the local feature effects using the global control methods. This paper proposes a novel local-control method for dynamic fluid simulation. Specifically, our method enables the generation vivid local features according to the pattern image specified by the user. We first search the whole fluid space to find the local areas best matched to the input pattern image. The special driving force is calculated to shape the local areas into the target pattern. In order to ensure the continuity of the whole velocity field, we mix the velocity fields of the local area and the one of its corresponding position in the global zone. Our method can provide the user or designers with the local-control tool for editing the dynamic fluid scenes intuitively. The dynamic fluid simulations with the local features have been experimented, which showed the validity and effectiveness of our method.