I want to repeat this simulation done by Prof Lu Xinzheng as this thesis has gone:
Xiong, Chen, et al. "Building seismic response and visualization using 3D urban polygonal modeling." Automation in Construction 55 (2015): 25-34.
And I just don't know how to create 3d building model in R2D software and output files (such as .vtk file) which can be used to make animations via paraview.