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Reference Guide
TTUBE.cxx
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1// @(#)root/g3d:$Id$
2// Author: Nenad Buncic 18/09/95
3
4/*************************************************************************
5 * Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *
6 * All rights reserved. *
7 * *
8 * For the licensing terms see $ROOTSYS/LICENSE. *
9 * For the list of contributors see $ROOTSYS/README/CREDITS. *
10 *************************************************************************/
11
12#include "TTUBE.h"
13#include "TNode.h"
14#include "TVirtualPad.h"
15#include "TBuffer.h"
16#include "TBuffer3D.h"
17#include "TBuffer3DTypes.h"
18#include "TGeometry.h"
19#include "TClass.h"
20#include "TMath.h"
21
23
24/** \class TTUBE
25\ingroup g3d
26A tube.
27
28\image html g3d_tube.png
29
30It has 6 parameters:
31
32 - name: name of the shape
33 - title: shape's title
34 - material: (see TMaterial)
35 - rmin: inside radius
36 - rmax: outside radius
37 - dz: half length in z
38*/
39
40////////////////////////////////////////////////////////////////////////////////
41/// TUBE shape default constructor
42
44{
45 fCoTab = 0;
46 fSiTab = 0;
47 fAspectRatio = 1;
48 fDz = 0.;
49 fNdiv = 0;
50 fRmin = 0.;
51 fRmax = 0.;
52}
53
54////////////////////////////////////////////////////////////////////////////////
55/// TUBE shape normal constructor
56
57TTUBE::TTUBE(const char *name, const char *title, const char *material, Float_t rmin, Float_t rmax, Float_t dz,Float_t aspect)
58 : TShape(name, title,material)
59{
60 fRmin = rmin;
61 fRmax = rmax;
62
63 fDz = dz;
64 fNdiv = 0;
65
66 fCoTab = 0;
67 fSiTab = 0;
68
69 fAspectRatio = aspect;
70
72}
73
74////////////////////////////////////////////////////////////////////////////////
75/// TUBE shape "simplified" constructor
76
77TTUBE::TTUBE(const char *name, const char *title, const char *material, Float_t rmax, Float_t dz)
78 : TShape(name, title,material)
79{
80 fRmin = 0;
81 fRmax = rmax;
82
83 fDz = dz;
84 fNdiv = 0;
85
86 fCoTab = 0;
87 fSiTab = 0;
88
89 fAspectRatio = 1;
90
92}
93
94////////////////////////////////////////////////////////////////////////////////
95///copy constructor
96
97TTUBE::TTUBE(const TTUBE& tu) :
98 TShape(tu),
99 fRmin(tu.fRmin),
100 fRmax(tu.fRmax),
101 fDz(tu.fDz),
102 fNdiv(tu.fNdiv),
103 fAspectRatio(tu.fAspectRatio),
104 fSiTab(tu.fSiTab),
105 fCoTab(tu.fCoTab)
106{
107}
108
109////////////////////////////////////////////////////////////////////////////////
110/// assignment operator
111
113{
114 if(this!=&tu) {
116 fRmin=tu.fRmin;
117 fRmax=tu.fRmax;
118 fDz=tu.fDz;
119 fNdiv=tu.fNdiv;
121 fSiTab=tu.fSiTab;
122 fCoTab=tu.fCoTab;
123 }
124 return *this;
125}
126
127////////////////////////////////////////////////////////////////////////////////
128/// Make table of sine and cosine.
129
130void TTUBE::MakeTableOfCoSin() const // Internal cache - const so other const fn can use
131{
132 const Double_t pi = TMath::ATan(1) * 4.0;
133
134 Int_t j;
136 if (fCoTab) delete [] fCoTab; // Delete the old tab if any
137 fCoTab = new Double_t [n];
138 if (!fCoTab ) {
139 Error("MakeTableOfCoSin()","No cos table done");
140 return;
141 }
142
143 if (fSiTab) delete [] fSiTab; // Delete the old tab if any
144 fSiTab = new Double_t [n];
145 if (!fSiTab ) {
146 Error("MakeTableOfCoSin()","No sin table done");
147 return;
148 }
149
150 Double_t range = 2*pi;
151
152 Double_t angstep = range/n;
153
154 Double_t ph = 0;
155 for (j = 0; j < n; j++) {
156 ph = j*angstep;
157 fCoTab[j] = TMath::Cos(ph);
158 fSiTab[j] = TMath::Sin(ph);
159 }
160}
161
162////////////////////////////////////////////////////////////////////////////////
163/// TUBE shape default destructor
164
166{
167 delete [] fCoTab;
168 delete [] fSiTab;
169}
170
171////////////////////////////////////////////////////////////////////////////////
172/// Compute distance from point px,py to a TUBE
173///
174/// Compute the closest distance of approach from point px,py to each
175/// computed outline point of the TUBE.
176
178{
180 Int_t numPoints = n*4;
181 return ShapeDistancetoPrimitive(numPoints,px,py);
182}
183
184////////////////////////////////////////////////////////////////////////////////
185/// Set number of divisions used to draw this tube
186
188{
189 fNdiv = ndiv;
191}
192
193////////////////////////////////////////////////////////////////////////////////
194/// Create TUBE points
195
197{
198 Int_t j, n;
199 Int_t indx = 0;
200
202
203 if (points) {
204 if (!fCoTab) MakeTableOfCoSin();
205 for (j = 0; j < n; j++) {
206 points[indx+6*n] = points[indx] = fRmin * fCoTab[j];
207 indx++;
208 points[indx+6*n] = points[indx] = fAspectRatio*fRmin * fSiTab[j];
209 indx++;
210 points[indx+6*n] = fDz;
211 points[indx] =-fDz;
212 indx++;
213 }
214 for (j = 0; j < n; j++) {
215 points[indx+6*n] = points[indx] = fRmax * fCoTab[j];
216 indx++;
217 points[indx+6*n] = points[indx] = fAspectRatio*fRmax * fSiTab[j];
218 indx++;
219 points[indx+6*n]= fDz;
220 points[indx] =-fDz;
221 indx++;
222 }
223 }
224}
225
226////////////////////////////////////////////////////////////////////////////////
227/// Set segments and polygons.
228
230{
231 Int_t i, j;
234
235 for (i = 0; i < 4; i++) {
236 for (j = 0; j < n; j++) {
237 buffer.fSegs[(i*n+j)*3 ] = c;
238 buffer.fSegs[(i*n+j)*3+1] = i*n+j;
239 buffer.fSegs[(i*n+j)*3+2] = i*n+j+1;
240 }
241 buffer.fSegs[(i*n+j-1)*3+2] = i*n;
242 }
243 for (i = 4; i < 6; i++) {
244 for (j = 0; j < n; j++) {
245 buffer.fSegs[(i*n+j)*3 ] = c+1;
246 buffer.fSegs[(i*n+j)*3+1] = (i-4)*n+j;
247 buffer.fSegs[(i*n+j)*3+2] = (i-2)*n+j;
248 }
249 }
250 for (i = 6; i < 8; i++) {
251 for (j = 0; j < n; j++) {
252 buffer.fSegs[(i*n+j)*3 ] = c;
253 buffer.fSegs[(i*n+j)*3+1] = 2*(i-6)*n+j;
254 buffer.fSegs[(i*n+j)*3+2] = (2*(i-6)+1)*n+j;
255 }
256 }
257
258 Int_t indx = 0;
259 i=0;
260 for (j = 0; j < n; j++) {
261 indx = 6*(i*n+j);
262 buffer.fPols[indx ] = c;
263 buffer.fPols[indx+1] = 4;
264 buffer.fPols[indx+5] = i*n+j;
265 buffer.fPols[indx+4] = (4+i)*n+j;
266 buffer.fPols[indx+3] = (2+i)*n+j;
267 buffer.fPols[indx+2] = (4+i)*n+j+1;
268 }
269 buffer.fPols[indx+2] = (4+i)*n;
270 i=1;
271 for (j = 0; j < n; j++) {
272 indx = 6*(i*n+j);
273 buffer.fPols[indx ] = c;
274 buffer.fPols[indx+1] = 4;
275 buffer.fPols[indx+2] = i*n+j;
276 buffer.fPols[indx+3] = (4+i)*n+j;
277 buffer.fPols[indx+4] = (2+i)*n+j;
278 buffer.fPols[indx+5] = (4+i)*n+j+1;
279 }
280 buffer.fPols[indx+5] = (4+i)*n;
281 i=2;
282 for (j = 0; j < n; j++) {
283 indx = 6*(i*n+j);
284 buffer.fPols[indx ] = c+i;
285 buffer.fPols[indx+1] = 4;
286 buffer.fPols[indx+2] = (i-2)*2*n+j;
287 buffer.fPols[indx+3] = (4+i)*n+j;
288 buffer.fPols[indx+4] = ((i-2)*2+1)*n+j;
289 buffer.fPols[indx+5] = (4+i)*n+j+1;
290 }
291 buffer.fPols[indx+5] = (4+i)*n;
292 i=3;
293 for (j = 0; j < n; j++) {
294 indx = 6*(i*n+j);
295 buffer.fPols[indx ] = c+i;
296 buffer.fPols[indx+1] = 4;
297 buffer.fPols[indx+5] = (i-2)*2*n+j;
298 buffer.fPols[indx+4] = (4+i)*n+j;
299 buffer.fPols[indx+3] = ((i-2)*2+1)*n+j;
300 buffer.fPols[indx+2] = (4+i)*n+j+1;
301 }
302 buffer.fPols[indx+2] = (4+i)*n;
303}
304
305////////////////////////////////////////////////////////////////////////////////
306/// Return total X3D needed by TNode::ls (when called with option "x")
307
308void TTUBE::Sizeof3D() const
309{
311
312 gSize3D.numPoints += n*4;
313 gSize3D.numSegs += n*8;
314 gSize3D.numPolys += n*4;
315}
316
317////////////////////////////////////////////////////////////////////////////////
318/// Stream an object of class TTUBE.
319
320void TTUBE::Streamer(TBuffer &R__b)
321{
322 if (R__b.IsReading()) {
323 UInt_t R__s, R__c;
324 Version_t R__v = R__b.ReadVersion(&R__s, &R__c);
325 if (R__v > 2) {
326 R__b.ReadClassBuffer(TTUBE::Class(), this, R__v, R__s, R__c);
327 return;
328 }
329 //====process old versions before automatic schema evolution
330 TShape::Streamer(R__b);
331 R__b >> fRmin;
332 R__b >> fRmax;
333 R__b >> fDz;
334 R__b >> fNdiv;
335 if (R__v > 1) R__b >> fAspectRatio;
336 R__b.CheckByteCount(R__s, R__c, TTUBE::IsA());
337 //====end of old versions
338 } else {
339 R__b.WriteClassBuffer(TTUBE::Class(),this);
340 }
341}
342
343////////////////////////////////////////////////////////////////////////////////
344/// Get buffer 3d.
345
346const TBuffer3D & TTUBE::GetBuffer3D(Int_t reqSections) const
347{
348 static TBuffer3D buffer(TBuffer3DTypes::kGeneric);
349
350 TShape::FillBuffer3D(buffer, reqSections);
351
352 // TODO: Although we now have a TBuffer3DTube class for
353 // tube shapes, we do not use it for old geometry tube, as
354 // OGL viewer needs various rotation matrix info we can't easily
355 // pass yet. To be revisited.
356
357 // We also do not fill the bounding box as derived classes can adjust shape
358 // leave up to viewer to work out
359 if (reqSections & TBuffer3D::kRawSizes) {
361 Int_t nbPnts = 4*n;
362 Int_t nbSegs = 8*n;
363 Int_t nbPols = 4*n;
364 if (buffer.SetRawSizes(nbPnts, 3*nbPnts, nbSegs, 3*nbSegs, nbPols, 6*nbPols)) {
366 }
367 }
368 if ((reqSections & TBuffer3D::kRaw) && buffer.SectionsValid(TBuffer3D::kRawSizes)) {
369 SetPoints(buffer.fPnts);
370 if (!buffer.fLocalFrame) {
371 TransformPoints(buffer.fPnts, buffer.NbPnts());
372 }
373 SetSegsAndPols(buffer);
375 }
376 return buffer;
377}
void Class()
Definition: Class.C:29
#define c(i)
Definition: RSha256.hxx:101
short Version_t
Definition: RtypesCore.h:63
unsigned int UInt_t
Definition: RtypesCore.h:44
double Double_t
Definition: RtypesCore.h:57
float Float_t
Definition: RtypesCore.h:55
#define ClassImp(name)
Definition: Rtypes.h:361
char name[80]
Definition: TGX11.cxx:109
point * points
Definition: X3DBuffer.c:22
#define gSize3D
Definition: X3DBuffer.h:40
Generic 3D primitive description class.
Definition: TBuffer3D.h:18
Int_t * fPols
Definition: TBuffer3D.h:114
UInt_t NbPnts() const
Definition: TBuffer3D.h:80
Bool_t SectionsValid(UInt_t mask) const
Definition: TBuffer3D.h:67
@ kRawSizes
Definition: TBuffer3D.h:53
void SetSectionsValid(UInt_t mask)
Definition: TBuffer3D.h:65
Int_t * fSegs
Definition: TBuffer3D.h:113
Bool_t fLocalFrame
Definition: TBuffer3D.h:90
Bool_t SetRawSizes(UInt_t reqPnts, UInt_t reqPntsCapacity, UInt_t reqSegs, UInt_t reqSegsCapacity, UInt_t reqPols, UInt_t reqPolsCapacity)
Set kRaw tessellation section of buffer with supplied sizes.
Definition: TBuffer3D.cxx:359
Double_t * fPnts
Definition: TBuffer3D.h:112
Buffer base class used for serializing objects.
Definition: TBuffer.h:42
virtual Int_t ReadClassBuffer(const TClass *cl, void *pointer, const TClass *onfile_class=0)=0
virtual Version_t ReadVersion(UInt_t *start=0, UInt_t *bcnt=0, const TClass *cl=0)=0
virtual Int_t CheckByteCount(UInt_t startpos, UInt_t bcnt, const TClass *clss)=0
Bool_t IsReading() const
Definition: TBuffer.h:85
virtual Int_t WriteClassBuffer(const TClass *cl, void *pointer)=0
virtual void Error(const char *method, const char *msgfmt,...) const
Issue error message.
Definition: TObject.cxx:891
This is the base class for all geometry shapes.
Definition: TShape.h:35
TShape & operator=(const TShape &)
assignment operator
Definition: TShape.cxx:93
Int_t GetBasicColor() const
Get basic color.
Definition: TShape.cxx:242
Int_t ShapeDistancetoPrimitive(Int_t numPoints, Int_t px, Int_t py)
Distance to primitive.
Definition: TShape.cxx:118
virtual void FillBuffer3D(TBuffer3D &buffer, Int_t reqSections) const
We have to set kRawSize (unless already done) to allocate buffer space before kRaw can be filled.
Definition: TShape.cxx:212
void TransformPoints(Double_t *points, UInt_t NbPnts) const
Transform points (LocalToMaster)
Definition: TShape.cxx:191
A tube.
Definition: TTUBE.h:32
Double_t * fCoTab
Table of sin(fPhi1) .... sin(fPhil+fDphi1)
Definition: TTUBE.h:45
Double_t * fSiTab
Definition: TTUBE.h:44
Float_t fRmax
Definition: TTUBE.h:36
virtual Int_t GetNumberOfDivisions() const
Definition: TTUBE.h:67
virtual void MakeTableOfCoSin() const
Make table of sine and cosine.
Definition: TTUBE.cxx:130
Float_t fAspectRatio
Definition: TTUBE.h:41
TTUBE & operator=(const TTUBE &)
assignment operator
Definition: TTUBE.cxx:112
Float_t fRmin
Definition: TTUBE.h:35
Int_t fNdiv
Definition: TTUBE.h:39
virtual const TBuffer3D & GetBuffer3D(Int_t reqSections) const
Get buffer 3d.
Definition: TTUBE.cxx:346
virtual void SetNumberOfDivisions(Int_t ndiv)
Set number of divisions used to draw this tube.
Definition: TTUBE.cxx:187
virtual void SetPoints(Double_t *points) const
Create TUBE points.
Definition: TTUBE.cxx:196
virtual Int_t DistancetoPrimitive(Int_t px, Int_t py)
Compute distance from point px,py to a TUBE.
Definition: TTUBE.cxx:177
Float_t fDz
Definition: TTUBE.h:38
virtual ~TTUBE()
TUBE shape default destructor.
Definition: TTUBE.cxx:165
virtual void SetSegsAndPols(TBuffer3D &buffer) const
Set segments and polygons.
Definition: TTUBE.cxx:229
TTUBE()
TUBE shape default constructor.
Definition: TTUBE.cxx:43
virtual void Sizeof3D() const
Return total X3D needed by TNode::ls (when called with option "x")
Definition: TTUBE.cxx:308
const Int_t n
Definition: legend1.C:16
static constexpr double pi
Double_t ATan(Double_t)
Definition: TMath.h:665
Double_t Cos(Double_t)
Definition: TMath.h:631
Double_t Sin(Double_t)
Definition: TMath.h:627