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source: GTP/trunk/Lib/Geom/shared/GTGeometry/include/GeoLodStripsLibrary.h @ 1526

Revision 1526, 5.5 KB checked in by gumbau, 18 years ago (diff)
Updated modules to the new interface and the new simplification algorithm improvements.

Line
1	/*==========================================================================
2	* (C) 2005 Universidad Jaime I de Castellón
3	*==========================================================================
4	* PROYECT: GAME TOOLS
5	==========================================================================/
6	/* CONTENT:
7	*
8	*
9	* @file GeoLodStripsLibrary.h
10	==========================================================================/
11
12	#ifndef _GEOLODSTRIPSLIBRARY
13	#define _GEOLODSTRIPSLIBRARY
14
15	#include "GeoMesh.h"
16	#include <vector>
17	#include "VertexData.h"
18	#include "GeoLodObject.h"
19
20	namespace Geometry
21	{
22	//typedef unsigned long int SmallInt;
23	typedef unsigned long SmallInt;
24	typedef unsigned long ULong;
25	typedef long Long;
26
27	typedef struct
28	{
29	SmallInt strip;
30	SmallInt position;
31	SmallInt rep; //For the vertex repetition
32	} PositionType;
33
34	typedef struct
35	{
36	unsigned long strip; // change this to uint32
37	char position;
38	char vertexRepetition;
39	char edgeRepetition;
40	char obligatory;
41	} LODRegisterType;
42
43	typedef struct
44	{
45	float Vertex[3];
46	SmallInt Next;
47	} VertexType;
48
49	typedef std::vector <SmallInt> SmallIntVector;
50	typedef std::vector <LODRegisterType> LODRegisterVector;
51	typedef std::vector <Long> LongVector;
52
53	/// LodStripsLibrary interface class.
54	/** This module contains functions that handle the levels of detail
55	* of the input multiresolution objects made of polygonal meshes.
56	* For any given resolution and object, this module returns a set
57	* of triangle strips representing the object at that resolution,
58	* that is, at the level of detail requested. These models use
59	* triangle strips to reduce storage usage and to speed up realistic
60	* rendering.
61	\n\n
62
63	Inputs:\n
64	- The module receives a file describing a multiresolution object.
65	.
66
67	Outputs:\n
68	- The module returns a strip set that represents the level of
69	detail requested.
70	.
71
72	*/
73	class LodStripsLibraryData
74	{
75	public:
76	SmallIntVector mFileVertices;
77	std::vector <LODRegisterType> mFileChangesLOD;
78	LongVector mData;
79	std::vector<unsigned int> p_changes;
80	};
81	class LodStripsLibrary : public Geometry::LodObject
82	{
83	private:
84
85	// The name of the object.
86	String mName;
87
88	// Structures with the data read from the file
89	// We won't work with these structures
90	SmallIntVector mFileVertices;
91	std::vector <LODRegisterType> mFileChangesLOD;
92	std::vector <SmallIntVector> mFileStrips;
93	LongVector mData;
94
95	// Structures with the data to work with
96
97	// Total strips of the multiresolution object.
98	SmallInt mTotalStrips;
99
100	// Total vertices of the multiresolution object.
101	SmallInt mTotalVertices;
102
103	// Number of vertices of the max LOD.
104	SmallInt mMaxVerticesLOD;
105
106	// Total changes of the multiresolution object.
107	SmallInt mTotalChanges;
108
109	SmallInt mLods; // Available Lods.
110	SmallInt mMaxLod; // Max level of detail.
111	SmallInt mMinLod; // Min level of detail.
112	SmallInt mCurrentLod; // Current Lod.
113
114	// For the efficient version.
115	SmallInt mTotalFaces;
116	SmallInt *mCurrentData;
117	SmallInt *mStripsChanges;
118	LODRegisterType *mCurrentRegLOD;
119	SmallInt *mVertex;
120
121	SmallInt minFaces, maxFaces;
122
123	// Changes of Strips in LOD file (p).
124	SmallInt *mPChanges;
125
126	///Total of vertices shown at the moment.
127	long int mTotal;
128
129	// Global mesh object.
130	Mesh *mGeoMesh;
131
132	// Copa STL vectors to C arrays.
133	void CopyVectors2Arrays(void);
134
135	// Loads Mesh.
136	void LoadStripMesh(const LodStripsLibraryData , Mesh geomesh);
137
138	// Geometry::CREATEINDEXDATAFUNC create_index_data_func;
139
140	// Strips vector.
141	SmallIntVector *mStrips;
142	int *indices_x_submesh;
143	int *offsets_x_submesh;
144
145	void UpdateDataRetrievalInterface(void);
146
147	//Number of strips in each submesh
148	int* mStripsSubmesh;
149	bool delete_indexdata;
150	int *submesh_x_strip;
151	Real lodFactor;
152	IndexData *dataRetrievalInterface;
153	uint32 current_triangle_count;
154
155	public:
156
157	IndexData *GetIndexDataInterface(void){ return dataRetrievalInterface; }
158
159	/** Constructor, receives as a parameter the name of the file
160	* including the multiresolution object.
161	*/
162	LodStripsLibrary(const LodStripsLibraryData , Mesh geomesh, IndexData * userindexdata = NULL);
163
164	/// Destructor.
165	~LodStripsLibrary(void);
166
167	/// Returns de current LOD and changes to the specified LOD.
168	virtual void GoToLod(Real);
169
170	/// Establishes the new LOD range.
171	/// Only the LODs in that range are stored and used.
172	void TrimByLod(uint32, uint32);
173
174	/// Returns the number of triangles of the highest LOD.
175	uint32 MaxFaces();
176
177	/// Returns the number of triangles of the lowest LOD.
178	uint32 MinFaces();
179
180	/// Returns the number of vertices of the highest LOD.
181	uint32 MaxVertices();
182
183	/// Returns the number of vertices of the lowest LOD.
184	uint32 MinVertices();
185
186	uint32 GetValidIndexCount(int submeshid) const { return indices_x_submesh[submeshid]; }
187	uint32 GetValidOffset(int submeshid) const { return offsets_x_submesh[submeshid]; }
188	uint32 GetTotalStripCount(void) const { return mTotalStrips; }
189	uint32 GetSubMeshtripCount(int submeshid) const { return mStripsSubmesh[submeshid]; }
190	uint32 GetCurrentTriangleCount(void) const { return current_triangle_count; }
191
192	virtual Real GetCurrentLodFactor(void) const { return lodFactor; }
193	};
194	}
195
196	#endif
197

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