Real-time, directable smoke simulation

Pursuing the true real-time has long been a problem in smoke animation. In this paper, we build upon work by solving the nondimentional Navier-Stokes equations, utilize the MacCormack method to solve the advection item for lowering numerical dissipation inherent in the semi-Lagrangian scheme, and compensate the high-detailed smoke turbulence on 2D slices over modern GPUs to shorten the simulation time. Besides, an especial rendering technique called view-aligned slices rendering is also proposed, which can effectively capture the smoke details generated by our methods and greatly reduce the time cost. Moreover, our model could also correctly handle the interaction of smoke with winds and stationary objects.