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source: trunk/source/geometry/solids/specific/include/G4TwistedTubs.hh @ 1253

Last change on this file since 1253 was 1228, checked in by garnier, 15 years ago
update geant4.9.3 tag
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1	//
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4	// * *
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6	// * the Geant4 Collaboration. It is provided under the terms and *
7	// * conditions of the Geant4 Software License, included in the file *
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14	// * regarding this software system or assume any liability for its *
15	// * use. Please see the license in the file LICENSE and URL above *
16	// * for the full disclaimer and the limitation of liability. *
17	// * *
18	// * This code implementation is the result of the scientific and *
19	// * technical work of the GEANT4 collaboration. *
20	// * By using, copying, modifying or distributing the software (or *
21	// * any work based on the software) you agree to acknowledge its *
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25	//
26	//
27	// $Id: G4TwistedTubs.hh,v 1.14 2007/05/23 09:32:35 gcosmo Exp $
28	// GEANT4 tag $Name: geant4-09-03 $
29	//
30	//
31	// --------------------------------------------------------------------
32	// GEANT 4 class header file
33	//
34	//
35	// G4TwistedTubs
36	//
37	// Class description:
38	//
39	// G4TwistedTubs is a sort of twisted cylinder.
40	// A twisted cylinder which is placed along with z-axis and is
41	// separated into phi-segments should become a hyperboloid, and
42	// its each segmented piece should be tilted with a stereo angle.
43	// G4TwistedTubs is a G4VSolid.
44	// It can have inner & outer surfaces as well as G4TwistedTubs,
45	// but cannot has different stereo angles between the inner surface
46	// and outer surface.
47
48	// Author:
49	// 01-Aug-2002 - Kotoyo Hoshina (hoshina@hepburn.s.chiba-u.ac.jp)
50	//
51	// History:
52	// 13-Nov-2003 - O.Link (Oliver.Link@cern.ch), Integration in Geant4
53	// from original version in Jupiter-2.5.02 application.
54	// --------------------------------------------------------------------
55	#ifndef __G4TWISTEDTUBS__
56	#define __G4TWISTEDTUBS__
57
58	#include "G4VSolid.hh"
59	#include "G4TwistTubsFlatSide.hh"
60	#include "G4TwistTubsSide.hh"
61	#include "G4TwistTubsHypeSide.hh"
62
63	class G4SolidExtentList;
64	class G4ClippablePolygon;
65
66	class G4TwistedTubs : public G4VSolid
67	{
68	public: // with description
69
70	G4TwistedTubs(const G4String &pname, // Name of instance
71	G4double twistedangle, // Twisted angle
72	G4double endinnerrad, // Inner radius at endcap
73	G4double endouterrad, // Outer radius at endcap
74	G4double halfzlen, // half z length
75	G4double dphi); // Phi angle of a segment
76
77	G4TwistedTubs(const G4String &pname, // Name of instance
78	G4double twistedangle, // Stereo angle
79	G4double endinnerrad, // Inner radius at endcap
80	G4double endouterrad, // Outer radius at endcap
81	G4double halfzlen, // half z length
82	G4int nseg, // Number of segments in totalPhi
83	G4double totphi); // Total angle of all segments
84
85	G4TwistedTubs(const G4String &pname, // Name of instance
86	G4double twistedangle, // Twisted angle
87	G4double innerrad, // Inner radius at z=0
88	G4double outerrad, // Outer radius at z=0
89	G4double negativeEndz, // -ve z endplate
90	G4double positiveEndz, // +ve z endplate
91	G4double dphi); // Phi angle of a segment
92
93	G4TwistedTubs(const G4String &pname, // Name of instance
94	G4double twistedangle, // Stereo angle
95	G4double innerrad, // Inner radius at z=0
96	G4double outerrad, // Outer radius at z=0
97	G4double negativeEndz, // -ve z endplate
98	G4double positiveEndz, // +ve z endplate
99	G4int nseg, // Number of segments in totalPhi
100	G4double totphi); // Total angle of all segments
101
102	virtual ~G4TwistedTubs();
103
104	void ComputeDimensions(G4VPVParameterisation * /* p */ ,
105	const G4int /* n */ ,
106	const G4VPhysicalVolume * /* prep */ );
107
108	G4bool CalculateExtent(const EAxis paxis,
109	const G4VoxelLimits &pvoxellimit,
110	const G4AffineTransform &ptransform,
111	G4double &pmin,
112	G4double &pmax ) const;
113
114	G4double DistanceToIn (const G4ThreeVector &p,
115	const G4ThreeVector &v ) const;
116
117	G4double DistanceToIn (const G4ThreeVector &p ) const;
118
119	G4double DistanceToOut(const G4ThreeVector &p,
120	const G4ThreeVector &v,
121	const G4bool calcnorm=G4bool(false),
122	G4bool *validnorm=0,
123	G4ThreeVector *n=0 ) const;
124
125	G4double DistanceToOut(const G4ThreeVector &p) const;
126
127	EInside Inside (const G4ThreeVector &p) const;
128
129	G4ThreeVector SurfaceNormal(const G4ThreeVector &p) const;
130
131	void DescribeYourselfTo (G4VGraphicsScene &scene) const;
132	G4Polyhedron *CreatePolyhedron () const;
133	G4NURBS *CreateNURBS () const;
134	G4Polyhedron *GetPolyhedron () const;
135
136	std::ostream &StreamInfo(std::ostream& os) const;
137
138	// accessors
139
140	inline G4double GetDPhi () const { return fDPhi ; }
141	inline G4double GetPhiTwist () const { return fPhiTwist ; }
142	inline G4double GetInnerRadius () const { return fInnerRadius; }
143	inline G4double GetOuterRadius () const { return fOuterRadius; }
144	inline G4double GetInnerStereo () const { return fInnerStereo; }
145	inline G4double GetOuterStereo () const { return fOuterStereo; }
146	inline G4double GetZHalfLength () const { return fZHalfLength; }
147	inline G4double GetKappa () const { return fKappa ; }
148
149	inline G4double GetTanInnerStereo () const { return fTanInnerStereo ; }
150	inline G4double GetTanInnerStereo2() const { return fTanInnerStereo2 ; }
151	inline G4double GetTanOuterStereo () const { return fTanOuterStereo ; }
152	inline G4double GetTanOuterStereo2() const { return fTanOuterStereo2 ; }
153
154	inline G4double GetEndZ (G4int i) const { return fEndZ[i] ; }
155	inline G4double GetEndPhi (G4int i) const { return fEndPhi[i]; }
156	inline G4double GetEndInnerRadius (G4int i) const
157	{ return fEndInnerRadius[i]; }
158	inline G4double GetEndOuterRadius (G4int i) const
159	{ return fEndOuterRadius[i]; }
160	inline G4double GetEndInnerRadius () const
161	{ return (fEndInnerRadius[0] > fEndInnerRadius[1] ?
162	fEndInnerRadius[0] : fEndInnerRadius[1]); }
163	inline G4double GetEndOuterRadius () const
164	{ return (fEndOuterRadius[0] > fEndOuterRadius[1] ?
165	fEndOuterRadius[0] : fEndOuterRadius[1]); }
166
167	G4VisExtent GetExtent () const;
168	G4GeometryType GetEntityType() const;
169
170	G4double GetCubicVolume();
171	// Returns an estimation of the geometrical cubic volume of the
172	// solid. Caches the computed value once computed the first time.
173	G4double GetSurfaceArea();
174	// Returns an estimation of the geometrical surface area of the
175	// solid. Caches the computed value once computed the first time.
176
177	G4ThreeVector GetPointOnSurface() const ;
178
179	public: // without description
180
181	G4TwistedTubs(__void__&);
182	// Fake default constructor for usage restricted to direct object
183	// persistency for clients requiring preallocation of memory for
184	// persistifiable objects.
185
186	#ifdef G4TWISTDEBUG
187	G4VTwistSurface * GetOuterHype() const { return fOuterHype; }
188	#endif
189
190	private:
191
192	inline void SetFields(G4double phitwist, G4double innerrad,
193	G4double outerrad,
194	G4double negativeEndz, G4double positiveEndz);
195
196	void CreateSurfaces();
197
198	static void AddPolyToExtent( const G4ThreeVector &v0,
199	const G4ThreeVector &v1,
200	const G4ThreeVector &w1,
201	const G4ThreeVector &w0,
202	const G4VoxelLimits &voxellimit,
203	const EAxis axis,
204	G4SolidExtentList &extentlist );
205	private:
206
207	G4double fPhiTwist; // Twist angle from -fZHalfLength to fZHalfLength
208	G4double fInnerRadius; // Inner-hype radius at z=0
209	G4double fOuterRadius; // Outer-hype radius at z=0
210	G4double fEndZ[2]; // z at endcaps, [0] = -ve z, [1] = +ve z
211	G4double fDPhi; // Phi-width of a segment fDPhi > 0
212	G4double fZHalfLength; // Half length along z-axis
213
214	G4double fInnerStereo; // Inner-hype stereo angle
215	G4double fOuterStereo; // Outer-hype stereo angle
216	G4double fTanInnerStereo; // std::tan(innerStereoAngle)
217	G4double fTanOuterStereo; // std::tan(outerStereoAngle)
218	G4double fKappa; // std::tan(fPhiTwist/2)/fZHalfLen;
219	G4double fEndInnerRadius[2]; // Inner-hype radii endcaps [0] -ve z, [1] +ve z
220	G4double fEndOuterRadius[2]; // Outer-hype radii endcaps [0] -ve z, [1] +ve z
221	G4double fEndPhi[2]; // Phi endcaps, [0] = -ve z, [1] = +ve z
222
223	G4double fInnerRadius2; // fInnerRadius * fInnerRadius
224	G4double fOuterRadius2; // fOuterRadius * fOuterRadius
225	G4double fTanInnerStereo2; // fInnerRadius * fInnerRadius
226	G4double fTanOuterStereo2; // fInnerRadius * fInnerRadius
227	G4double fEndZ2[2]; // fEndZ * fEndZ
228
229	G4VTwistSurface *fLowerEndcap; // Surface of -ve z
230	G4VTwistSurface *fUpperEndcap; // Surface of +ve z
231	G4VTwistSurface *fLatterTwisted; // Surface of -ve phi
232	G4VTwistSurface *fFormerTwisted; // Surface of +ve phi
233	G4VTwistSurface *fInnerHype; // Surface of -ve r
234	G4VTwistSurface *fOuterHype; // Surface of +ve r
235
236	G4double fCubicVolume; // Cached value for cubic volume
237	G4double fSurfaceArea; // Cached value for surface area
238
239	mutable G4Polyhedron* fpPolyhedron; // pointer to polyhedron for vis
240
241	class LastState // last Inside result
242	{
243	public:
244	LastState()
245	{
246	p.set(kInfinity,kInfinity,kInfinity);
247	inside = kOutside;
248	}
249	~LastState(){}
250	public:
251	G4ThreeVector p;
252	EInside inside;
253	};
254
255	class LastVector // last SurfaceNormal result
256	{
257	public:
258	LastVector()
259	{
260	p.set(kInfinity,kInfinity,kInfinity);
261	vec.set(kInfinity,kInfinity,kInfinity);
262	surface = new G4VTwistSurface*[1];
263	}
264	~LastVector()
265	{
266	delete [] surface;
267	}
268	public:
269	G4ThreeVector p;
270	G4ThreeVector vec;
271	G4VTwistSurface **surface;
272	};
273
274	class LastValue // last G4double value
275	{
276	public:
277	LastValue()
278	{
279	p.set(kInfinity,kInfinity,kInfinity);
280	value = DBL_MAX;
281	}
282	~LastValue(){}
283	public:
284	G4ThreeVector p;
285	G4double value;
286	};
287
288	class LastValueWithDoubleVector // last G4double value
289	{
290	public:
291	LastValueWithDoubleVector()
292	{
293	p.set(kInfinity,kInfinity,kInfinity);
294	vec.set(kInfinity,kInfinity,kInfinity);
295	value = DBL_MAX;
296	}
297	~LastValueWithDoubleVector(){}
298	public:
299	G4ThreeVector p;
300	G4ThreeVector vec;
301	G4double value;
302	};
303
304	LastState fLastInside;
305	LastVector fLastNormal;
306	LastValue fLastDistanceToIn;
307	LastValue fLastDistanceToOut;
308	LastValueWithDoubleVector fLastDistanceToInWithV;
309	LastValueWithDoubleVector fLastDistanceToOutWithV;
310
311	};
312
313	//=====================================================================
314
315	//---------------------
316	// inline functions
317	//---------------------
318
319	inline
320	void G4TwistedTubs::SetFields(G4double phitwist, G4double innerrad,
321	G4double outerrad, G4double negativeEndz,
322	G4double positiveEndz)
323	{
324	fCubicVolume = 0.;
325	fPhiTwist = phitwist;
326	fEndZ[0] = negativeEndz;
327	fEndZ[1] = positiveEndz;
328	fEndZ2[0] = fEndZ[0] * fEndZ[0];
329	fEndZ2[1] = fEndZ[1] * fEndZ[1];
330	fInnerRadius = innerrad;
331	fOuterRadius = outerrad;
332	fInnerRadius2 = fInnerRadius * fInnerRadius;
333	fOuterRadius2 = fOuterRadius * fOuterRadius;
334
335	G4int maxi;
336	if (std::fabs(fEndZ[0]) >= std::fabs(fEndZ[1])) {
337	fZHalfLength = std::fabs(fEndZ[0]);
338	maxi = 0;
339	} else {
340	fZHalfLength = std::fabs(fEndZ[1]);
341	maxi = 1;
342	}
343
344	G4double parity = (fPhiTwist > 0 ? 1 : -1);
345	G4double tanHalfTwist = std::tan(0.5 * fPhiTwist);
346	G4double innerNumerator = std::fabs(fInnerRadius * tanHalfTwist) * parity;
347	G4double outerNumerator = std::fabs(fOuterRadius * tanHalfTwist) * parity;
348
349	fTanInnerStereo = innerNumerator / fZHalfLength;
350	fTanOuterStereo = outerNumerator / fZHalfLength;
351	fTanInnerStereo2 = fTanInnerStereo * fTanInnerStereo;
352	fTanOuterStereo2 = fTanOuterStereo * fTanOuterStereo;
353	fInnerStereo = std::atan2(innerNumerator, fZHalfLength);
354	fOuterStereo = std::atan2(outerNumerator, fZHalfLength);
355	fEndInnerRadius[0] = std::sqrt(fInnerRadius2 + fEndZ2[0] * fTanInnerStereo2);
356	fEndInnerRadius[1] = std::sqrt(fInnerRadius2 + fEndZ2[1] * fTanInnerStereo2);
357	fEndOuterRadius[0] = std::sqrt(fOuterRadius2 + fEndZ2[0] * fTanOuterStereo2);
358	fEndOuterRadius[1] = std::sqrt(fOuterRadius2 + fEndZ2[1] * fTanOuterStereo2);
359
360	fKappa = tanHalfTwist / fZHalfLength;
361	fEndPhi[0] = std::atan2(fEndZ[0] * tanHalfTwist, fZHalfLength);
362	fEndPhi[1] = std::atan2(fEndZ[1] * tanHalfTwist, fZHalfLength);
363
364	#ifdef G4TWISTDEBUG
365	G4cout << "/******* G4TwistedTubs::SetFields() Field Parameters *************** " << G4endl;
366	G4cout << "/* fPhiTwist : " << fPhiTwist << G4endl;
367	G4cout << "/* fEndZ(0, 1) : " << fEndZ[0] << " , " << fEndZ[1] << G4endl;
368	G4cout << "/* fEndPhi(0, 1) : " << fEndPhi[0] << " , " << fEndPhi[1] << G4endl;
369	G4cout << "/* fInnerRadius, fOuterRadius : " << fInnerRadius << " , " << fOuterRadius << G4endl;
370	G4cout << "/* fEndInnerRadius(0, 1) : " << fEndInnerRadius[0] << " , "
371	<< fEndInnerRadius[1] << G4endl;
372	G4cout << "/* fEndOuterRadius(0, 1) : " << fEndOuterRadius[0] << " , "
373	<< fEndOuterRadius[1] << G4endl;
374	G4cout << "/* fInnerStereo, fOuterStereo : " << fInnerStereo << " , " << fOuterStereo << G4endl;
375	G4cout << "/* tanHalfTwist, fKappa : " << tanHalfTwist << " , " << fKappa << G4endl;
376	G4cout << "/*********************************************************************** " << G4endl;
377	#endif
378	}
379
380	#endif

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