Abstract: In this paper, we present a physically based technique for simulating inviscid fluids. Our contribution is concerned with two issues. First, for solving the advection equation, we introduce a hybrid scheme that couples the FLIP scheme with the semi-Lagrangian scheme by adaptively distributing implicit particles and using a transition layer to propagate information. Secondly, for solving pressure, we develop a flux based scheme that can embed arbitrary solid boundaries into a Poisson equation. And based on this scheme we make further improvement to achieve two-way fluid/solid coupling on an octree structure with second-order accuracy. Finally, the experimental results demonstrate that our hybrid scheme for advection can preserve relatively fine surface details with less computation expenditure; and simultaneously our robust pressure solver can handle both stationary and moving obstacles more efficiently compared with unstructured meshes.