library: libGraf3d
#include "TPoints3DABC.h" |
TPoints3DABC
class description - header file - source file - inheritance tree (.pdf)
This is an abstract class, constructors will not be documented.
Look at the header to check for available constructors.
public:
virtual ~TPoints3DABC()
virtual Int_t Add(Float_t x, Float_t y, Float_t z)
virtual Int_t AddLast(Float_t x, Float_t y, Float_t z)
static TClass* Class()
static Int_t DistancetoLine(Int_t px, Int_t py, Float_t x1, Float_t y1, Float_t x2, Float_t y2, Int_t lineWidth = 1)
virtual Int_t DistancetoPrimitive(Int_t px, Int_t py)
virtual Int_t GetLastPosition() const
virtual Int_t GetN() const
virtual Option_t* GetOption() const
virtual Float_t* GetP() const
virtual Float_t GetX(Int_t idx) const
virtual Float_t* GetXYZ(Float_t* xyz, Int_t idx, Int_t num = 1) const
virtual const Float_t* GetXYZ(Int_t idx)
virtual Float_t GetY(Int_t idx) const
virtual Float_t GetZ(Int_t idx) const
virtual TClass* IsA() const
TPoints3DABC& operator=(const TPoints3DABC&)
virtual void PaintPoints(Int_t n, Float_t* p, Option_t* option = "")
virtual Int_t SetLastPosition(Int_t idx)
virtual Int_t SetNextPoint(Float_t x, Float_t y, Float_t z)
virtual void SetOption(Option_t* option = "")
virtual Int_t SetPoint(Int_t point, Float_t x, Float_t y, Float_t z)
virtual Int_t SetPoints(Int_t n, Float_t* p = 0, Option_t* option = "")
virtual void ShowMembers(TMemberInspector& insp, char* parent)
virtual Int_t Size() const
virtual void Streamer(TBuffer& b)
void StreamerNVirtual(TBuffer& b)
Int_t DistancetoLine(Int_t px, Int_t py, Float_t x1, Float_t y1, Float_t x2, Float_t y2, Int_t lineWidth )
Compute distance from point px,py to an axis of the band defined.
by pair points (x1,y1),(x2,y2) where lineWidth is the width of the band
Compute the closest distance of approach from point px,py to this line.
The distance is computed in pixels units.
Algorithm:
A(x1,y1) P B(x2,y2)
------------------------------------------------
I
I
I
I
M(x,y)
Let us call a = distance AM a2=a**2
b = distance BM b2=b**2
c = distance AB c2=c**2
d = distance PM d2=d**2
u = distance AP u2=u**2
v = distance BP v2=v**2 c = u + v
d2 = a2 - u2
d2 = b2 - v2 = b2 -(c-u)**2
==> u = (a2 -b2 +c2)/2c
Float_t x1 = gPad->XtoAbsPixel(xp1);
Float_t y1 = gPad->YtoAbsPixel(yp1);
Float_t x2 = gPad->XtoAbsPixel(xp2);
Float_t y2 = gPad->YtoAbsPixel(yp2);
Int_t GetN()
GetN() returns the number of allocated cells if any.
GetN() > 0 shows how many cells
can be available via GetP() method.
GetN() == 0 then GetP() must return 0 as well
Float_t * GetP()
GetP() returns the pointer to the float point array
of points if available
The number of the available celss can be found via
GetN() method.
GetN() > 0 shows how many cells
Float_t * GetXYZ(Float_t *xyz,Int_t idx,Int_t num)
GetXYZ(Float_t *xyz,Int_t idx,Int_t num=1) fills the buffer supplied
by the calling code with the points information.
Input parameters:
Float_t *xyz - an external user supplied floating point array.
Int_t num - the total number of the points to be copied
the dimension of that array the size of the
array is num*sizeof(Float_t) at least
Int_t idx - The index of the first copy to be taken.
Return: The pointer to the buffer array supplied
Author: Valery Fine(fine@mail.cern.ch) 04/05/99
Last update: root/g3d:$Name: $:$Id: TPoints3DABC.cxx,v 1.5 2005/11/24 17:28:07 couet Exp $
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