when i debug the following program, i found some question: the code work well when the “material=MPMSolver.material_elastic” or “material=MPMSolver.material_snow”. However when “material=MPMSolver.material_water” the code cannot work anymore, can you help me to find the reason for this? thank you so much.
the code i used is show in the below website
the problem is as show by the following gif picture