OpenMesh: OpenMesh/Core/Utils/vector_cast.hh Source File

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vector_cast.hh
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42 /*===========================================================================*\
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47 \*===========================================================================*/
48
49
50 //=============================================================================
51 //
52 // Helper Functions for binary reading / writing
53 //
54 //=============================================================================
55
56
57 #ifndef OPENMESH_VECTORCAST_HH
58 #define OPENMESH_VECTORCAST_HH
59
60
61 //== INCLUDES =================================================================
62
63
64 #include <OpenMesh/Core/System/config.h>
65 #include <OpenMesh/Core/Utils/vector_traits.hh>
66 #include <OpenMesh/Core/Utils/GenProg.hh>
67 #include <OpenMesh/Core/Geometry/VectorT.hh>
68
69
70 //== NAMESPACES ===============================================================
71
72
73 namespace OpenMesh {
74
75
76 //=============================================================================
77
78
82
83 //-----------------------------------------------------------------------------
84
85 template <typename src_t, typename dst_t, int n>
86 inline void vector_cast( const src_t &_src, dst_t &_dst, GenProg::Int2Type<n> )
87 {
88 assert_compile(vector_traits<dst_t>::size_ <= vector_traits<src_t>::size_)
89 vector_cast(_src,_dst, GenProg::Int2Type<n-1>());
90 _dst[n-1] = static_cast<typename vector_traits<dst_t>::value_type >(_src[n-1]);
91 }
92
93 template <typename src_t, typename dst_t>
94 inline void vector_cast( const src_t & /*_src*/, dst_t & /*_dst*/, GenProg::Int2Type<0> )
95 {
96 }
97
98 template <typename src_t, typename dst_t, int n>
99 inline void vector_copy( const src_t &_src, dst_t &_dst, GenProg::Int2Type<n> )
100 {
101 assert_compile(vector_traits<dst_t>::size_ <= vector_traits<src_t>::size_)
102 vector_copy(_src,_dst, GenProg::Int2Type<n-1>());
103 _dst[n-1] = _src[n-1];
104 }
105
106 template <typename src_t, typename dst_t>
107 inline void vector_copy( const src_t & /*_src*/, dst_t & /*_dst*/ , GenProg::Int2Type<0> )
108 {
109 }
110
111
112
113 //-----------------------------------------------------------------------------
114 #ifndef DOXY_IGNORE_THIS
115
116 template <typename dst_t, typename src_t>
117 struct vector_caster
118 {
119 typedef dst_t return_type;
120
121 inline static return_type cast(const src_t& _src)
122 {
123 dst_t dst;
124 vector_cast(_src, dst, GenProg::Int2Type<vector_traits<dst_t>::size_>());
125 return dst;
126 }
127 };
128
129 #if !defined(OM_CC_MSVC)
130 template <typename dst_t>
131 struct vector_caster<dst_t,dst_t>
132 {
133 typedef const dst_t& return_type;
134
135 inline static return_type cast(const dst_t& _src)
136 {
137 return _src;
138 }
139 };
140 #endif
141
142 #endif
143 //-----------------------------------------------------------------------------
144
145
147 template <typename dst_t, typename src_t>
148 inline
149 typename vector_caster<dst_t, src_t>::return_type
150 vector_cast(const src_t& _src )
151 {
152 return vector_caster<dst_t, src_t>::cast(_src);
153 }
154
155
157
158
159 //=============================================================================
160 } // namespace OpenMesh
161 //=============================================================================
162 #endif // OPENMESH_MESHREADER_HH defined
163 //=============================================================================
OpenMesh::vector_traits::value_type
T::value_type value_type
Type of the scalar value.
Definition: vector_traits.hh:99
OpenMesh::vector_copy
void vector_copy(const src_t &_src, dst_t &_dst, GenProg::Int2Type< n >)
Cast vector type to another vector type by copying the vector elements.
Definition: vector_cast.hh:99
OpenMesh
Contains all the mesh ingredients like the polygonal mesh, the triangle mesh, different mesh kernels ...
Definition: MeshItems.hh:64
OpenMesh::vector_cast
void vector_cast(const src_t &_src, dst_t &_dst, GenProg::Int2Type< n >)
Cast vector type to another vector type by copying the vector elements.
Definition: vector_cast.hh:86
OpenMesh::vector_traits
Helper class providing information about a vector type.
Definition: vector_traits.hh:93