celeritas::g4org::Transformer Class Reference

Return an ORANGE transformation from a Geant4 transformation. More...

#include <Transformer.hh>

Public Types
Type aliases
using	Real3 = Array< double, 3 >

Public Member Functions
	Transformer (Scaler const &scale)
	Construct with a scaling function.
Translation	operator() (G4ThreeVector const &t) const
	Create a transform from a translation.
Transformation	operator() (G4RotationMatrix const &rot) const
Transformation	operator() (G4ThreeVector const &t, G4RotationMatrix const &rot) const
	Create a transform from a translation plus rotation.
VariantTransform	operator() (G4ThreeVector const &t, G4RotationMatrix const *rot) const
Transformation	operator() (G4AffineTransform const &at) const
	Create a transform from an affine transform. More...

Detailed Description

Return an ORANGE transformation from a Geant4 transformation.

In Geant4, "object" or "direct" transform refers to daughter-to-parent, how to place the daughter object in the parent. The "frame" transform (raw GetTransform or the fPtrTransform object) is how to transform from parent to daughter and is the inverse of that transform.

Even though the affine transform's matrix has a operator() which does a matrix-vector multiply (aka gemv), this is not the same as the affine transform's rotation, which applies the inverse of the stored matrix.

All ORANGE/Celeritas transforms are "daughter to parent". The transforms returned from this function must be daughter-to-parent!

Member Function Documentation

operator()()

auto celeritas::g4org::Transformer::operator() ( G4AffineTransform const &  affine ) const

inline

Create a transform from an affine transform.

The affine transform's stored rotation matrix is inverted!

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The documentation for this class was generated from the following file:

• orange/g4org/Transformer.hh