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Forum: Geometry
Re: Question Modifying the geometry via messenger class (Lukas Schulte)
Date: 23 Dec, 2010
From: John Allison <John Allison>

I can't explain why the position information in your hits does not change (but see note below), but there is a bug - fixed in the new release, 9.4 - whereby sometimes the vis database doesn't get rebuilt. Try


Note: When you change geometry, one way is to "clean" the volume stores and start again - see examples/novice/N03/src/

G4VPhysicalVolume* DetectorConstruction::ConstructCalorimeter() {
  // Clean old geometry, if any

Alternatively, you can access a physical volumes and change the transformation - see examples/extended/analysis/A01/src/, A01DetectorConstruction::SetArmAngle. Then tell the run manager either with code:

  // tell G4RunManager that we change the geometry

or by command line.

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