  In this paper, we introduce an interactive coastal wave simulation and
visualization software, called Celeris. Celeris is an open source software
which needs minimum preparation to run on a Windows machine. The software
solves the extended Boussinesq equations using a hybrid finite volume - finite
difference method and supports moving shoreline boundaries. The simulation and
visualization are performed on the GPU using Direct3D libraries, which enables
the software to run faster than real-time. Celeris provides a first-of-its-kind
interactive modeling platform for coastal wave applications and it supports
simultaneous visualization with both photorealistic and colormapped rendering
capabilities. We validate our software through comparison with three standard
benchmarks for non-breaking and breaking waves.
