Houdini - Import / Export alembic animation with chopnet and use it in a simulation          pretty handy when deal with fast moving object easy to sim  (再次感謝 John Kent :)
       ex. Fast moving object on fire or fast moving container with liquid

In Sop

• Chopnet > object / target object "geo node under alembic">export / channels : t[xyz] , Node "target transform node", path : t[xyz]
  
  also another one for rotation (r[xyz])

• ps: In houdini16 they change the "export tag" and "lock tag" position in network viewer.
  
  
• option > Set Normal to 0,1,0  define a up vector (can be set as gravity in liquid sim)
• Right click transform node / action / create reference node
  and select the invert transformation. so move it back to the origin position for sim

In Dop

• Pyro - bring in V to buoyancy:
  
      buoyancy lift should be length from v
      dir should be v itself

• Liquid sim - bring in N as gravity and use point cloud to get the V from the animation