source: trunk/VUT/GtpVisibilityPreprocessor/src/Preprocessor.h @ 162

Revision 162, 3.1 KB checked in by bittner, 19 years ago (diff)

functional raycasting version

Line 
1#ifndef _Preprocessor_H__
2#define _Preprocessor_H__
3
4#include <string>
5using namespace std;
6#include "Containers.h"
7#include "Mesh.h"
8#include "KdTree.h"
9#include "ViewCellBsp.h"
10//#include "SceneGraph.h"
11
12class SceneGraph;
13
14/** Namespace for the external visibility preprocessor
15
16    This namespace includes all classes which are created by the VUT (Vienna University
17    of Technology) for the External Visibility Preprocessor of the GTP (GameTools Project)
18    (www.gametools.org).
19*/
20 
21  /** Main class of the visibility preprocessor. Responsible for loading and
22      saving of the input and output files. Initiates construction of the kD-tree,
23      viewcell loading/generation and the visibility computation itself.
24  */
25class Preprocessor {
26public:
27  /** Load the input scene.
28      @param filename file to load
29        @return true on success
30  */
31  virtual bool LoadScene(const string filename);
32 
33  /** Load the input viewcells. The input viewcells should be given as a collection
34      of meshes. Each mesh is assume to form a bounded polyhedron defining the interior of
35      the viewcell. The method then builds a BSP tree of these view cells.
36        @param filename file to load
37        @return true on success
38  */
39  virtual bool LoadViewcells(const string filename);
40 
41  /** Generate the viewCells automatically. The particular algorithm to be used depends
42      on the environment setting. Initially the generated viewcells will cover the whole
43      bounding volume of the scene. They can be pruned later depending on the results
44      of visibility computations.
45      @return true on successful viewcell generation.
46  */
47  virtual bool GenerateViewcells();
48 
49  /** Export all preprocessed data in a XML format understandable by the
50      PreprocessingInterface of the GtpVisibilityPreprocessor Module. The file can be compressed depending
51      on the environement settings.
52      @return true on successful export
53  */
54  virtual bool ExportPreprocessedData(const string filename);
55 
56  /** Build the KdTree of currently loaded occluders/occludees/viewcells. The construction
57      is driven by the environment settings, which also sais which of the three types of
58      entities should be used to drive the heuristical construction (only occluders by default)
59  */
60  virtual bool BuildKdTree();
61 
62  /** Compute visibility method. This method has to be reimplemented by the actual
63      Preprocessor implementation (e.g. SamplingPreprocessor, ExactPreprocessor,
64      GlobalSamplingpreprocessor)
65    */
66  virtual bool ComputeVisibility() = 0;
67 
68 
69  bool
70  Export( const string filename,
71          const bool scene,
72          const bool kdtree
73          );
74 
75 
76  virtual void KdTreeStatistics(ostream &s);
77 
78  /// scene graph loaded from file
79  SceneGraph *mSceneGraph;
80  /// BSP tree representing the viewcells
81  BSPTree *mViewCellBSPTree;
82  /// kD-tree organizing the scene graph (occluders + occludees) + viewcells
83  KdTree *mKdTree;
84 
85  /// list of all loaded occluders
86  MeshContainer mOccluders;
87  /// list of all loaded occludees
88  MeshContainer mOccludees;
89  /// list of all loaded/generated viewcells
90  ViewCellContainer mViewcells;
91 
92 
93 
94};
95
96
97
98
99
100#endif
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