# TGeoGtra

*class description - source file - inheritance tree*

**public:**

TGeoGtra TGeoGtra()
TGeoGtra TGeoGtra(Double_t dz, Double_t theta, Double_t phi, Double_t twist, Double_t h1, Double_t bl1, Double_t tl1, Double_t alpha1, Double_t h2, Double_t bl2, Double_t tl2, Double_t alpha2)
TGeoGtra TGeoGtra(const TGeoGtra&)
virtual void ~TGeoGtra()
static TClass* Class()
virtual TGeoShape* GetMakeRuntimeShape(TGeoShape* mother) const
Double_t GetTwistAngle() const
virtual TClass* IsA() const
virtual void ShowMembers(TMemberInspector& insp, char* parent)
virtual void Streamer(TBuffer& b)
void StreamerNVirtual(TBuffer& b)

**protected:**

Double_t fTwistAngle *twist angle in degrees*

TGeoTrap
TRAP is a general trapezoid, i.e. one for which the faces perpendicular
to z are trapezia and their centres are not the same x, y. It has 11
parameters: the half length in z, the polar angles from the centre of
the face at low z to that at high z, H1 the half length in y at low z,
LB1 the half length in x at low z and y low edge, LB2 the half length
in x at low z and y high edge, TH1 the angle w.r.t. the y axis from the
centre of low y edge to the centre of the high y edge, and H2, LB2,
LH2, TH2, the corresponding quantities at high z.
/*
*/

TGeoGtra()

dummy ctor

TGeoGtra(Double_t dz, Double_t theta, Double_t phi, Double_t twist, Double_t h1,
Double_t bl1, Double_t tl1, Double_t alpha1, Double_t h2, Double_t bl2,
Double_t tl2, Double_t alpha2)

constructor.

~TGeoGtra()

destructor

TGeoShape* GetMakeRuntimeShape(TGeoShape *mother) const

in case shape has some negative parameters, these has to be computed
in order to fit the mother

### Inline Functions

Double_t GetTwistAngle() const
TClass* Class()
TClass* IsA() const
void ShowMembers(TMemberInspector& insp, char* parent)
void Streamer(TBuffer& b)
void StreamerNVirtual(TBuffer& b)
TGeoGtra TGeoGtra(const TGeoGtra&)

*Author: Andrei Gheata 31/01/02*

*Last update: root/geom:$Name: $:$Id: TGeoArb8.cxx,v 1.7 2002/07/15 15:32:25 brun Exp $*

*Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. **

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