ROOT 6.10/09 Reference Guide |
THelix has two different constructors.
If a particle with charge q passes through a point (x,y,z) with momentum (px,py,pz) with magnetic field B along an axis (nx,ny,nz), this helix can be constructed like:
A helix in its own frame can be defined with a pivotal point (x0,y0,z0), the velocity at that point (vx0,vy0,vz0), and an angular frequency w. Combining vx0 and vy0 to a transverse velocity vt0 one can parametrize the helix as:
The second constructor has 6 parameters,
Example:
where:
Example constructing a helix with several default values and drawing it:
This initializes a helix with its axis in Z direction (rtype=kHelixZ).
Public Member Functions | |
THelix () | |
Helix default constructor. More... | |
THelix (Double_t x, Double_t y, Double_t z, Double_t vx, Double_t vy, Double_t vz, Double_t w) | |
Helix normal constructor. More... | |
THelix (Double_t *xyz, Double_t *v, Double_t w, Double_t *range=0, EHelixRangeType rtype=kHelixZ, Double_t *axis=0) | |
Helix normal constructor. More... | |
THelix (const THelix &helix) | |
Helix copy constructor. More... | |
virtual | ~THelix () |
Helix destructor. More... | |
virtual void | Copy (TObject &helix) const |
Copy this helix to obj. More... | |
virtual void | Draw (Option_t *option="") |
Draw this helix with its current attributes. More... | |
Option_t * | GetOption () const |
virtual void | Print (Option_t *option="") const |
Dump this helix with its attributes. More... | |
virtual void | SavePrimitive (std::ostream &out, Option_t *option="") |
Save primitive as a C++ statement(s) on output stream out. More... | |
virtual void | SetAxis (Double_t *axis) |
Set a new axis for the helix. This will make a new rotation matrix. More... | |
virtual void | SetAxis (Double_t x, Double_t y, Double_t z) |
Set axis. More... | |
void | SetHelix (Double_t *xyz, Double_t *v, Double_t w, Double_t *range=0, EHelixRangeType type=kUnchanged, Double_t *axis=0) |
Set all helix parameters. More... | |
virtual void | SetOption (Option_t *option="") |
virtual void | SetRange (Double_t *range, EHelixRangeType rtype=kHelixZ) |
Set a new range for the helix. This will remake the polyline. More... | |
virtual void | SetRange (Double_t r1, Double_t r2, EHelixRangeType rtype=kHelixZ) |
Set range. More... | |
Public Member Functions inherited from TPolyLine3D | |
TPolyLine3D () | |
3-D polyline default constructor. More... | |
TPolyLine3D (Int_t n, Option_t *option="") | |
3-D polyline normal constructor with initialization to 0. More... | |
TPolyLine3D (Int_t n, Float_t *p, Option_t *option="") | |
3-D polyline normal constructor. More... | |
TPolyLine3D (Int_t n, Double_t *p, Option_t *option="") | |
3-D polyline normal constructor. More... | |
TPolyLine3D (Int_t n, Float_t *x, Float_t *y, Float_t *z, Option_t *option="") | |
3-D polyline normal constructor. More... | |
TPolyLine3D (Int_t n, Double_t *x, Double_t *y, Double_t *z, Option_t *option="") | |
3-D polyline normal constructor. More... | |
TPolyLine3D (const TPolyLine3D &polylin) | |
3-D polyline copy ctor. More... | |
virtual | ~TPolyLine3D () |
3-D polyline destructor. More... | |
virtual Int_t | DistancetoPrimitive (Int_t px, Int_t py) |
Compute distance from point px,py to a 3-D polyline. More... | |
virtual void | DrawPolyLine (Int_t n, Float_t *p, Option_t *option="") |
Draw 3-D polyline with new coordinates. More... | |
virtual void | ExecuteEvent (Int_t event, Int_t px, Int_t py) |
Execute action corresponding to one event. More... | |
Int_t | GetLastPoint () const |
Int_t | GetN () const |
Option_t * | GetOption () const |
Float_t * | GetP () const |
virtual void | ls (Option_t *option="") const |
List this 3-D polyline. More... | |
virtual Int_t | Merge (TCollection *list) |
Merge polylines in the collection in this polyline. More... | |
TPolyLine3D & | operator= (const TPolyLine3D &polylin) |
assignment operator More... | |
virtual void | Paint (Option_t *option="") |
Paint a TPolyLine3D. More... | |
virtual Int_t | SetNextPoint (Double_t x, Double_t y, Double_t z) |
Set point following LastPoint to x, y, z. More... | |
virtual void | SetPoint (Int_t point, Double_t x, Double_t y, Double_t z) |
Set point n to x, y, z. More... | |
virtual void | SetPolyLine (Int_t n, Option_t *option="") |
Re-initialize polyline with n points (0,0,0). More... | |
virtual void | SetPolyLine (Int_t n, Float_t *p, Option_t *option="") |
Re-initialize polyline with n points from p. More... | |
virtual void | SetPolyLine (Int_t n, Double_t *p, Option_t *option="") |
Re-initialize polyline with n points from p. More... | |
virtual Int_t | Size () const |
Public Member Functions inherited from TObject | |
TObject () | |
TObject constructor. More... | |
TObject (const TObject &object) | |
TObject copy ctor. More... | |
virtual | ~TObject () |
TObject destructor. More... | |
void | AbstractMethod (const char *method) const |
Use this method to implement an "abstract" method that you don't want to leave purely abstract. More... | |
virtual void | AppendPad (Option_t *option="") |
Append graphics object to current pad. More... | |
virtual void | Browse (TBrowser *b) |
Browse object. May be overridden for another default action. More... | |
virtual const char * | ClassName () const |
Returns name of class to which the object belongs. More... | |
virtual void | Clear (Option_t *="") |
virtual TObject * | Clone (const char *newname="") const |
Make a clone of an object using the Streamer facility. More... | |
virtual Int_t | Compare (const TObject *obj) const |
Compare abstract method. More... | |
virtual void | Delete (Option_t *option="") |
Delete this object. More... | |
virtual void | DrawClass () const |
Draw class inheritance tree of the class to which this object belongs. More... | |
virtual TObject * | DrawClone (Option_t *option="") const |
Draw a clone of this object in the current selected pad for instance with: gROOT->SetSelectedPad(gPad) . More... | |
virtual void | Dump () const |
Dump contents of object on stdout. More... | |
virtual void | Error (const char *method, const char *msgfmt,...) const |
Issue error message. More... | |
virtual void | Execute (const char *method, const char *params, Int_t *error=0) |
Execute method on this object with the given parameter string, e.g. More... | |
virtual void | Execute (TMethod *method, TObjArray *params, Int_t *error=0) |
Execute method on this object with parameters stored in the TObjArray. More... | |
virtual void | Fatal (const char *method, const char *msgfmt,...) const |
Issue fatal error message. More... | |
virtual TObject * | FindObject (const char *name) const |
Must be redefined in derived classes. More... | |
virtual TObject * | FindObject (const TObject *obj) const |
Must be redefined in derived classes. More... | |
virtual Option_t * | GetDrawOption () const |
Get option used by the graphics system to draw this object. More... | |
virtual const char * | GetIconName () const |
Returns mime type name of object. More... | |
virtual const char * | GetName () const |
Returns name of object. More... | |
virtual char * | GetObjectInfo (Int_t px, Int_t py) const |
Returns string containing info about the object at position (px,py). More... | |
virtual const char * | GetTitle () const |
Returns title of object. More... | |
virtual UInt_t | GetUniqueID () const |
Return the unique object id. More... | |
virtual Bool_t | HandleTimer (TTimer *timer) |
Execute action in response of a timer timing out. More... | |
virtual ULong_t | Hash () const |
Return hash value for this object. More... | |
virtual void | Info (const char *method, const char *msgfmt,...) const |
Issue info message. More... | |
virtual Bool_t | InheritsFrom (const char *classname) const |
Returns kTRUE if object inherits from class "classname". More... | |
virtual Bool_t | InheritsFrom (const TClass *cl) const |
Returns kTRUE if object inherits from TClass cl. More... | |
virtual void | Inspect () const |
Dump contents of this object in a graphics canvas. More... | |
void | InvertBit (UInt_t f) |
virtual Bool_t | IsEqual (const TObject *obj) const |
Default equal comparison (objects are equal if they have the same address in memory). More... | |
virtual Bool_t | IsFolder () const |
Returns kTRUE in case object contains browsable objects (like containers or lists of other objects). More... | |
Bool_t | IsOnHeap () const |
virtual Bool_t | IsSortable () const |
Bool_t | IsZombie () const |
void | MayNotUse (const char *method) const |
Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary). More... | |
virtual Bool_t | Notify () |
This method must be overridden to handle object notification. More... | |
void | Obsolete (const char *method, const char *asOfVers, const char *removedFromVers) const |
Use this method to declare a method obsolete. More... | |
void | operator delete (void *ptr) |
Operator delete. More... | |
void | operator delete[] (void *ptr) |
Operator delete []. More... | |
void * | operator new (size_t sz) |
void * | operator new (size_t sz, void *vp) |
void * | operator new[] (size_t sz) |
void * | operator new[] (size_t sz, void *vp) |
TObject & | operator= (const TObject &rhs) |
TObject assignment operator. More... | |
virtual void | Pop () |
Pop on object drawn in a pad to the top of the display list. More... | |
virtual Int_t | Read (const char *name) |
Read contents of object with specified name from the current directory. More... | |
virtual void | RecursiveRemove (TObject *obj) |
Recursively remove this object from a list. More... | |
void | ResetBit (UInt_t f) |
virtual void | SaveAs (const char *filename="", Option_t *option="") const |
Save this object in the file specified by filename. More... | |
void | SetBit (UInt_t f, Bool_t set) |
Set or unset the user status bits as specified in f. More... | |
void | SetBit (UInt_t f) |
virtual void | SetDrawOption (Option_t *option="") |
Set drawing option for object. More... | |
virtual void | SetUniqueID (UInt_t uid) |
Set the unique object id. More... | |
virtual void | SysError (const char *method, const char *msgfmt,...) const |
Issue system error message. More... | |
Bool_t | TestBit (UInt_t f) const |
Int_t | TestBits (UInt_t f) const |
virtual void | UseCurrentStyle () |
Set current style settings in this object This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked. More... | |
virtual void | Warning (const char *method, const char *msgfmt,...) const |
Issue warning message. More... | |
virtual Int_t | Write (const char *name=0, Int_t option=0, Int_t bufsize=0) |
Write this object to the current directory. More... | |
virtual Int_t | Write (const char *name=0, Int_t option=0, Int_t bufsize=0) const |
Write this object to the current directory. More... | |
Public Member Functions inherited from TAttLine | |
TAttLine () | |
AttLine default constructor. More... | |
TAttLine (Color_t lcolor, Style_t lstyle, Width_t lwidth) | |
AttLine normal constructor. More... | |
virtual | ~TAttLine () |
AttLine destructor. More... | |
void | Copy (TAttLine &attline) const |
Copy this line attributes to a new TAttLine. More... | |
Int_t | DistancetoLine (Int_t px, Int_t py, Double_t xp1, Double_t yp1, Double_t xp2, Double_t yp2) |
Compute distance from point px,py to a line. More... | |
virtual Color_t | GetLineColor () const |
Return the line color. More... | |
virtual Style_t | GetLineStyle () const |
Return the line style. More... | |
virtual Width_t | GetLineWidth () const |
Return the line width. More... | |
virtual void | Modify () |
Change current line attributes if necessary. More... | |
virtual void | ResetAttLine (Option_t *option="") |
Reset this line attributes to default values. More... | |
virtual void | SaveLineAttributes (std::ostream &out, const char *name, Int_t coldef=1, Int_t stydef=1, Int_t widdef=1) |
Save line attributes as C++ statement(s) on output stream out. More... | |
virtual void | SetLineAttributes () |
Invoke the DialogCanvas Line attributes. More... | |
virtual void | SetLineColor (Color_t lcolor) |
Set the line color. More... | |
virtual void | SetLineColorAlpha (Color_t lcolor, Float_t lalpha) |
Set a transparent line color. More... | |
virtual void | SetLineStyle (Style_t lstyle) |
Set the line style. More... | |
virtual void | SetLineWidth (Width_t lwidth) |
Set the line width. More... | |
Public Member Functions inherited from TAtt3D | |
TAtt3D () | |
virtual | ~TAtt3D () |
virtual void | Sizeof3D () const |
Set total size of this 3D object (used by X3D interface). More... | |
Protected Member Functions | |
Double_t | FindClosestPhase (Double_t phi0, Double_t cosine) |
Finds the closest phase to phi0 that gives cos(phase) = cosine. More... | |
THelix & | operator= (const THelix &) |
assignment operator More... | |
void | SetRotMatrix () |
Set the rotational matrix according to the helix axis. More... | |
Protected Member Functions inherited from TObject | |
virtual void | DoError (int level, const char *location, const char *fmt, va_list va) const |
Interface to ErrorHandler (protected). More... | |
void | MakeZombie () |
Protected Attributes | |
Double_t | fAxis [3] |
Double_t | fPhi0 |
Double_t | fRange [2] |
TRotMatrix * | fRotMat |
Double_t | fVt |
Double_t | fVz |
Double_t | fW |
Double_t | fX0 |
Double_t | fY0 |
Double_t | fZ0 |
Protected Attributes inherited from TPolyLine3D | |
Int_t | fLastPoint |
The index of the last filled point. More... | |
Int_t | fN |
Number of points. More... | |
TString | fOption |
options More... | |
Float_t * | fP |
[3*fN] Array of 3-D coordinates (x,y,z) More... | |
Protected Attributes inherited from TAttLine | |
Color_t | fLineColor |
Line color. More... | |
Style_t | fLineStyle |
Line style. More... | |
Width_t | fLineWidth |
Line width. More... | |
Static Protected Attributes | |
static Int_t | fgMinNSeg =5 |
Additional Inherited Members | |
Public Types inherited from TObject | |
enum | { kIsOnHeap = 0x01000000, kNotDeleted = 0x02000000, kZombie = 0x04000000, kBitMask = 0x00ffffff } |
enum | { kSingleKey = BIT(0), kOverwrite = BIT(1), kWriteDelete = BIT(2) } |
enum | EStatusBits { kCanDelete = BIT(0), kMustCleanup = BIT(3), kObjInCanvas = BIT(3), kIsReferenced = BIT(4), kHasUUID = BIT(5), kCannotPick = BIT(6), kNoContextMenu = BIT(8), kInvalidObject = BIT(13) } |
Static Public Member Functions inherited from TPolyLine3D | |
static void | DrawOutlineCube (TList *outline, Double_t *rmin, Double_t *rmax) |
Draw cube outline with 3d polylines. More... | |
Static Public Member Functions inherited from TObject | |
static Long_t | GetDtorOnly () |
Return destructor only flag. More... | |
static Bool_t | GetObjectStat () |
Get status of object stat flag. More... | |
static void | SetDtorOnly (void *obj) |
Set destructor only flag. More... | |
static void | SetObjectStat (Bool_t stat) |
Turn on/off tracking of objects in the TObjectTable. More... | |
#include <THelix.h>
THelix::THelix | ( | ) |
Helix default constructor.
Definition at line 122 of file THelix.cxx.
THelix::THelix | ( | Double_t | x, |
Double_t | y, | ||
Double_t | z, | ||
Double_t | vx, | ||
Double_t | vy, | ||
Double_t | vz, | ||
Double_t | w | ||
) |
Helix normal constructor.
Definition at line 135 of file THelix.cxx.
THelix::THelix | ( | Double_t * | xyz, |
Double_t * | v, | ||
Double_t | w, | ||
Double_t * | range = 0 , |
||
EHelixRangeType | rtype = kHelixZ , |
||
Double_t * | axis = 0 |
||
) |
Helix normal constructor.
Definition at line 157 of file THelix.cxx.
THelix::THelix | ( | const THelix & | helix | ) |
Helix copy constructor.
Definition at line 236 of file THelix.cxx.
|
virtual |
Helix destructor.
Definition at line 227 of file THelix.cxx.
Draw this helix with its current attributes.
Reimplemented from TPolyLine3D.
Definition at line 280 of file THelix.cxx.
Finds the closest phase to phi0 that gives cos(phase) = cosine.
Definition at line 597 of file THelix.cxx.
|
inlinevirtual |
assignment operator
Definition at line 204 of file THelix.cxx.
Dump this helix with its attributes.
Reimplemented from TPolyLine3D.
Definition at line 289 of file THelix.cxx.
Save primitive as a C++ statement(s) on output stream out.
Reimplemented from TPolyLine3D.
Definition at line 298 of file THelix.cxx.
Set a new axis for the helix. This will make a new rotation matrix.
Definition at line 322 of file THelix.cxx.
Set axis.
Definition at line 347 of file THelix.cxx.
void THelix::SetHelix | ( | Double_t * | xyz, |
Double_t * | v, | ||
Double_t | w, | ||
Double_t * | range = 0 , |
||
EHelixRangeType | type = kUnchanged , |
||
Double_t * | axis = 0 |
||
) |
Set all helix parameters.
Definition at line 84 of file THelix.cxx.
Reimplemented from TPolyLine3D.
|
virtual |
Set a new range for the helix. This will remake the polyline.
Definition at line 357 of file THelix.cxx.
|
virtual |
Set range.
Definition at line 550 of file THelix.cxx.
|
protected |
Set the rotational matrix according to the helix axis.
Definition at line 568 of file THelix.cxx.
|
protected |