Hi Takefumi, I am not sure to understand fully your request. You can add the statement gSystem->Load("libPhysics"); in your rootlogon.C file if you always use the libPhysics library. Rene Brun Takefumi SORA wrote: > > Hi, rooters. > > I have two questions. > > 1. To use TVector3 we must execute "gSystem->Load("libPhysics")". > And to use my original macro, we execute ".L mymacro.C" > To use them without writing in my script, Where should we write > these infomation? > > 2. I can call TVector3 class but I can't do the operations > (e.g. v1 = v2 - v3, v2 += v1) which are defined in TVector3. > What file should I load? > > Takefumi
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