1 // Created on: 1996-01-18
2 // Created by: Frederic MAUPAS
3 // Copyright (c) 1996-1999 Matra Datavision
4 // Copyright (c) 1999-2014 OPEN CASCADE SAS
6 // This file is part of Open CASCADE Technology software library.
8 // This library is free software; you can redistribute it and/or modify it under
9 // the terms of the GNU Lesser General Public License version 2.1 as published
10 // by the Free Software Foundation, with special exception defined in the file
11 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
12 // distribution for complete text of the license and disclaimer of any warranty.
14 // Alternatively, this file may be used under the terms of Open CASCADE
15 // commercial license or contractual agreement.
17 #ifndef _STEPConstruct_UnitContext_HeaderFile
18 #define _STEPConstruct_UnitContext_HeaderFile
20 #include <Standard.hxx>
21 #include <Standard_DefineAlloc.hxx>
22 #include <Standard_Handle.hxx>
24 #include <Standard_Boolean.hxx>
25 #include <Standard_Real.hxx>
26 #include <Standard_Integer.hxx>
27 #include <Standard_CString.hxx>
28 #include <StepBasic_SiPrefix.hxx>
29 class StepGeom_GeomRepContextAndGlobUnitAssCtxAndGlobUncertaintyAssCtx;
30 class StepRepr_GlobalUnitAssignedContext;
31 class StepBasic_NamedUnit;
32 class StepRepr_GlobalUncertaintyAssignedContext;
33 class StepBasic_SiUnit;
36 //! Tool for creation (encoding) and decoding (for writing and reading
37 //! accordingly) context defining units and tolerances (uncerntanties)
38 class STEPConstruct_UnitContext
45 //! Creates empty tool
46 Standard_EXPORT STEPConstruct_UnitContext();
48 //! Creates new context (units are MM and radians,
49 //! uncertainty equal to Tol3d)
50 Standard_EXPORT void Init (const Standard_Real Tol3d);
52 //! Returns True if Init was called successfully
53 Standard_EXPORT Standard_Boolean IsDone() const;
55 //! Returns context (or Null if not done)
56 Standard_EXPORT Handle(StepGeom_GeomRepContextAndGlobUnitAssCtxAndGlobUncertaintyAssCtx) Value() const;
58 //! Computes the length, plane angle and solid angle conversion
59 //! factor . Returns a status, 0 if OK
60 Standard_EXPORT Standard_Integer ComputeFactors (const Handle(StepRepr_GlobalUnitAssignedContext)& aContext);
62 Standard_EXPORT Standard_Integer ComputeFactors (const Handle(StepBasic_NamedUnit)& aUnit);
64 //! Computes the uncertainty value (for length)
65 Standard_EXPORT Standard_Integer ComputeTolerance (const Handle(StepRepr_GlobalUncertaintyAssignedContext)& aContext);
67 //! Returns the lengthFactor
68 Standard_EXPORT Standard_Real LengthFactor() const;
70 //! Returns the planeAngleFactor
71 Standard_EXPORT Standard_Real PlaneAngleFactor() const;
73 //! Returns the solidAngleFactor
74 Standard_EXPORT Standard_Real SolidAngleFactor() const;
76 //! Returns the Uncertainty value (for length)
77 //! It has been converted with LengthFactor
78 Standard_EXPORT Standard_Real Uncertainty() const;
80 //! Returns the areaFactor
81 Standard_EXPORT Standard_Real AreaFactor() const;
83 //! Returns the volumeFactor
84 Standard_EXPORT Standard_Real VolumeFactor() const;
86 //! Tells if a Uncertainty (for length) is recorded
87 Standard_EXPORT Standard_Boolean HasUncertainty() const;
89 //! Returns true if ComputeFactors has calculated
91 Standard_EXPORT Standard_Boolean LengthDone() const;
93 //! Returns true if ComputeFactors has calculated
94 //! a PlaneAngleFactor
95 Standard_EXPORT Standard_Boolean PlaneAngleDone() const;
97 //! Returns true if ComputeFactors has calculated
98 //! a SolidAngleFactor
99 Standard_EXPORT Standard_Boolean SolidAngleDone() const;
101 //! Returns true if areaFactor is computed
102 Standard_EXPORT Standard_Boolean AreaDone() const;
104 //! Returns true if volumeFactor is computed
105 Standard_EXPORT Standard_Boolean VolumeDone() const;
107 //! Returns a message for a given status (0 - empty)
108 //! This message can then be added as warning for transfer
109 Standard_EXPORT Standard_CString StatusMessage (const Standard_Integer status) const;
111 //! Convert SI prefix defined by enumertaion to corresponding
112 //! real factor (e.g. 1e6 for mega)
113 Standard_EXPORT static Standard_Real ConvertSiPrefix (const StepBasic_SiPrefix aPrefix);
127 //! Fills numerical equivalent of SiUnitName (in SI value)
128 //! Returns False if name SiUnit Name not recognized
129 Standard_EXPORT Standard_Boolean SiUnitNameFactor (const Handle(StepBasic_SiUnit)& aSiUnit, Standard_Real& val) const;
132 Standard_Boolean done;
133 Handle(StepGeom_GeomRepContextAndGlobUnitAssCtxAndGlobUncertaintyAssCtx) GRC;
134 Standard_Real lengthFactor;
135 Standard_Real planeAngleFactor;
136 Standard_Real solidAngleFactor;
137 Standard_Real theUncertainty;
138 Standard_Real areaFactor;
139 Standard_Real volumeFactor;
140 Standard_Boolean areaDone;
141 Standard_Boolean volumeDone;
142 Standard_Boolean lengthDone;
143 Standard_Boolean planeAngleDone;
144 Standard_Boolean solidAngleDone;
145 Standard_Boolean hasUncertainty;
156 #endif // _STEPConstruct_UnitContext_HeaderFile