The pilot reported that while on short final, he made note of the wind direction. After touchdown the wind direction changed and he attempted to adjust for the wind shift however, the airplane departed the right side of the runway, traversed on the dirt, and struck a ditch. The landing gear collapsed and the airplane came to a rest on its belly which substantially damaged the fuselage. The pilot reported no preimpact mechanical failures or malfunctions that would have precluded normal operation.