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[ Changes in definition of TriMesh: PART I ] 

Note for the developers: the change to make to existing projects is very little
but strictly necessary to compile. This change IS NOT backward compliant.


==== OLD ==== way to define a TriMesh:

// forward declarations
class MyVertex;
class MyEdge;
class MyFace;

class MyVertex: public VertexSimp2 < MyVertex, MyEdge, MyFace, vertex::Coord3f,...other components>{};
class MyFace: public FaceSimp2 < MyVertex, MyEdge, MyFace, face::VertexRef,...other components>{};
class MyMesh: public TriMesh<vector<MyVertex>,vector<MyFace> >{};


==== NEW ==== way to define a TriMesh:
// forward declarations
class MyVertex;
class MyEdge;
class MyFace;

// declaration of which types is used as VertexType, which type is used as FaceType and so on...
class MyUsedTypes: public vcg::UsedType < vcg::Use<MyVertex>::AsVertexType,
                                         vcg::Use<MyFace>::AsFaceType>{};

class MyVertex: public Vertex < MyUsedTypes, vertex::Coord3f,...other components>{};
class MyFace: public Face < MyUsedTypes, face::VertexRef,...other components>{};
class MyMesh: public TriMesh<vector<MyVertex>,vector<MyFace> >{};

                               ===== classes introduced         [vcg::UsedType] : it is a class containing all the types that must be passed to the definition of Vertex, Face, Edge... This
class replaces the list of classes to pass as first templates and the need to specify the maximal simplicial. So

< MyVertex, MyEdge, MyFace,  beocmes  MyUsedTypes,
and
VertexSimp2 becomes Vertex

[vcg::Use] : an auxiliary class to give a simple way to specify the role of a type

Note 2: the order of templates parameters to vcg::UsedTypes is unimportant, e.g:

class MyUsedTypes: public vcg::UsedType <vcg::Use<MyVertex>::AsVertexType,
                                        vcg::Use<MyEdge>::AsEdgeType,
                                        vcg::Use<MyFace>::AsFaceType>{};

is the same as:
class MyUsedTypes: public vcg::UsedType <vcg::Use<MyFace>::AsFaceType,
                                        vcg::Use<MyEdge>::AsEdgeType,
                                        vcg::Use<MyVertex>::AsVertexType>{};

==== the Part II will be a tiny change to the class TriMesh it self.
This commit is contained in:
ganovelli 2010-03-15 13:10:43 +00:00
parent ae83ca17ed
commit 2e739825c8
1 changed files with 50 additions and 0 deletions
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50
vcg/complex/used_types.h Executable file
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#ifndef VCG_USED_TYPES_H
#define VCG_USED_TYPES_H
#include <vcg/space/point3.h>
#include <vcg/container/derivation_chain.h>
namespace vcg{
struct DummyTypes{
typedef char VertexType; // simplex types
typedef char EdgeType;
typedef char FaceType;
typedef char TetraType;
typedef char HEdgeType; // connector types
typedef vcg::Point3f CoordType; // connector types
typedef float ScalarType; // connector types
typedef VertexType * VertexPointer;
typedef EdgeType * EdgePointer ;
typedef FaceType * FacePointer ;
typedef TetraType * TetraPointer ;
typedef HEdgeType * HEdgePointer ;
static void Name(std::vector<std::string> & name){}
template < class LeftV>
void ImportLocal(const LeftV & left ) {}
};
template <template <typename> class A = DefaultDeriver, template <typename> class B = DefaultDeriver,
template <typename> class C = DefaultDeriver, template <typename> class D = DefaultDeriver,
template <typename> class E = DefaultDeriver, template <typename> class F = DefaultDeriver,
template <typename> class G = DefaultDeriver, template <typename> class H = DefaultDeriver,
template <typename> class I = DefaultDeriver, template <typename> class J = DefaultDeriver,
template <typename> class K = DefaultDeriver, template <typename> class L = DefaultDeriver>
class UsedTypes: public Arity12<DummyTypes, A, B, C, D, E, F, G, H, I, J, K, L> {};
template <class A>
struct Use{
template <class T> struct AsVertexType: public T{typedef A VertexType; typedef VertexType * VertexPointer ;};
template <class T> struct AsEdgeType: public T{typedef A EdgeType; typedef EdgeType * EdgePointer ;};
template <class T> struct AsFaceType: public T{typedef A FaceType; typedef FaceType * FacePointer ;};
template <class T> struct AsTetraType: public T{typedef A TetraType; typedef TetraType * TetraPointer ;};
template <class T> struct AsHEdgeType: public T{typedef A HEdgeType; typedef HEdgeType * HEdgePointer ;};
};
};
#endif // USED_TYPES_H