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1// Copyright (C) 2002-2012 Nikolaus Gebhardt
2// This file is part of the "Irrlicht Engine".
3// For conditions of distribution and use, see copyright notice in irrlicht.h
4
5// The code for the TerrainTriangleSelector is based on the GeoMipMapSelector
6// developed by Spintz. He made it available for Irrlicht and allowed it to be
7// distributed under this licence. I only modified some parts. A lot of thanks go to him.
8
9#ifndef __C_TERRAIN_TRIANGLE_SELECTOR_H__
10#define __C_TERRAIN_TRIANGLE_SELECTOR_H__
11
12#include "ITriangleSelector.h"
13#include "irrArray.h"
14
15namespace irr
16{
17namespace scene
18{
19
20class ITerrainSceneNode;
21
22//! Triangle Selector for the TerrainSceneNode
23/** The code for the TerrainTriangleSelector is based on the GeoMipMapSelector
24developed by Spintz. He made it available for Irrlicht and allowed it to be
25distributed under this licence. I only modified some parts. A lot of thanks go
26to him.
27*/
28class CTerrainTriangleSelector : public ITriangleSelector
29{
30public:
31
32 //! Constructs a selector based on an ITerrainSceneNode
33 CTerrainTriangleSelector(ITerrainSceneNode* node, s32 LOD);
34
35 //! Destructor
36 virtual ~CTerrainTriangleSelector();
37
38 //! Clears and sets triangle data
39 virtual void setTriangleData (ITerrainSceneNode* node, s32 LOD);
40
41 //! Gets all triangles.
42 void getTriangles(core::triangle3df* triangles, s32 arraySize, s32& outTriangleCount,
43 const core::matrix4* transform=0) const;
44
45 //! Gets all triangles which lie within a specific bounding box.
46 void getTriangles(core::triangle3df* triangles, s32 arraySize, s32& outTriangleCount,
47 const core::aabbox3d<f32>& box, const core::matrix4* transform=0) const;
48
49 //! Gets all triangles which have or may have contact with a 3d line.
50 virtual void getTriangles(core::triangle3df* triangles, s32 arraySize,
51 s32& outTriangleCount, const core::line3d<f32>& line,
52 const core::matrix4* transform=0) const;
53
54 //! Returns amount of all available triangles in this selector
55 virtual s32 getTriangleCount() const;
56
57 //! Return the scene node associated with a given triangle.
58 virtual ISceneNode* getSceneNodeForTriangle(u32 triangleIndex) const;
59
60 // Get the number of TriangleSelectors that are part of this one
61 virtual u32 getSelectorCount() const;
62
63 // Get the TriangleSelector based on index based on getSelectorCount
64 virtual ITriangleSelector* getSelector(u32 index);
65
66 // Get the TriangleSelector based on index based on getSelectorCount
67 virtual const ITriangleSelector* getSelector(u32 index) const;
68
69private:
70
71 friend class CTerrainSceneNode;
72
73 struct SGeoMipMapTrianglePatch
74 {
75 core::array<core::triangle3df> Triangles;
76 s32 NumTriangles;
77 core::aabbox3df Box;
78 };
79
80 struct SGeoMipMapTrianglePatches
81 {
82 SGeoMipMapTrianglePatches() :
83 NumPatches(0), TotalTriangles(0)
84 {
85 }
86
87 core::array<SGeoMipMapTrianglePatch> TrianglePatchArray;
88 s32 NumPatches;
89 u32 TotalTriangles;
90 };
91
92 ITerrainSceneNode* SceneNode;
93 SGeoMipMapTrianglePatches TrianglePatches;
94};
95
96} // end namespace scene
97} // end namespace irr
98
99
100#endif // __C_TERRAIN_TRIANGLE_SELECTOR_H__