93 lines
2.8 KiB
C++
93 lines
2.8 KiB
C++
// Copyright (C) 2002-2009 Nikolaus Gebhardt
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// This file is part of the "Irrlicht Engine".
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// For conditions of distribution and use, see copyright notice in irrlicht.h
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// The code for the TerrainTriangleSelector is based on the GeoMipMapSelector
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// developed by Spintz. He made it available for Irrlicht and allowed it to be
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// distributed under this licence. I only modified some parts. A lot of thanks go to him.
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#ifndef __C_TERRAIN_TRIANGLE_SELECTOR_H__
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#define __C_TERRAIN_TRIANGLE_SELECTOR_H__
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#include "ITriangleSelector.h"
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#include "irrArray.h"
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namespace irr
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{
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namespace scene
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{
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class ITerrainSceneNode;
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//! Triangle Selector for the TerrainSceneNode
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//! The code for the TerrainTriangleSelector is based on the GeoMipMapSelector
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//! developed by Spintz. He made it available for Irrlicht and allowed it to be
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//! distributed under this licence. I only modified some parts. A lot of thanks go to him.
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class CTerrainTriangleSelector : public ITriangleSelector
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{
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public:
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//! Constructs a selector based on an IGeoMipMapSceneNode
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CTerrainTriangleSelector(ITerrainSceneNode* node, s32 LOD);
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//! Destructor
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virtual ~CTerrainTriangleSelector();
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//! Clears and sets triangle data
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virtual void setTriangleData (ITerrainSceneNode* node, s32 LOD);
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//! Gets all triangles.
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void getTriangles(core::triangle3df* triangles, s32 arraySize, s32& outTriangleCount,
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const core::matrix4* transform=0) const;
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//! Gets all triangles which lie within a specific bounding box.
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void getTriangles(core::triangle3df* triangles, s32 arraySize, s32& outTriangleCount,
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const core::aabbox3d<f32>& box, const core::matrix4* transform=0) const;
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//! Gets all triangles which have or may have contact with a 3d line.
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virtual void getTriangles(core::triangle3df* triangles, s32 arraySize,
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s32& outTriangleCount, const core::line3d<f32>& line,
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const core::matrix4* transform=0) const;
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//! Returns amount of all available triangles in this selector
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virtual s32 getTriangleCount() const;
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//! Return the scene node associated with a given triangle.
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/** ITerrainSceneNode is an ISceneNode, we just don't know it yet. */
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virtual const ISceneNode* getSceneNodeForTriangle(u32 triangleIndex) const
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{ return (ISceneNode*)SceneNode; }
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private:
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friend class CTerrainSceneNode;
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struct SGeoMipMapTrianglePatch
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{
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core::array<core::triangle3df> Triangles;
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s32 NumTriangles;
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core::aabbox3df Box;
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};
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struct SGeoMipMapTrianglePatches
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{
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SGeoMipMapTrianglePatches() :
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NumPatches(0), TotalTriangles(0)
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{
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}
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core::array<SGeoMipMapTrianglePatch> TrianglePatchArray;
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s32 NumPatches;
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u32 TotalTriangles;
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};
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ITerrainSceneNode* SceneNode;
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SGeoMipMapTrianglePatches TrianglePatches;
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};
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} // end namespace scene
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} // end namespace irr
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#endif // __C_TERRAIN_TRIANGLE_SELECTOR_H__
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