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// Copyright (C) 2002-2012 Nikolaus Gebhardt
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h
#ifndef __C_OCTREE_TRIANGLE_SELECTOR_H_INCLUDED__
#define __C_OCTREE_TRIANGLE_SELECTOR_H_INCLUDED__
#include "CTriangleSelector.h"
namespace irr
{
namespace scene
{
class ISceneNode;
//! Stupid triangle selector without optimization
class COctreeTriangleSelector : public CTriangleSelector
{
public:
//! Constructs a selector based on a mesh
COctreeTriangleSelector(const IMesh* mesh, ISceneNode* node, s32 minimalPolysPerNode);
virtual ~COctreeTriangleSelector();
//! Gets all triangles which lie within a specific bounding box.
virtual void getTriangles(core::triangle3df* triangles, s32 arraySize, s32& outTriangleCount,
const core::aabbox3d<f32>& box, const core::matrix4* transform=0) const;
//! Gets all triangles which have or may have contact with a 3d line.
virtual void getTriangles(core::triangle3df* triangles, s32 arraySize,
s32& outTriangleCount, const core::line3d<f32>& line,
const core::matrix4* transform=0) const;
private:
struct SOctreeNode
{
SOctreeNode()
{
for (u32 i=0; i!=8; ++i)
Child[i] = 0;
}
~SOctreeNode()
{
for (u32 i=0; i!=8; ++i)
delete Child[i];
}
core::array<core::triangle3df> Triangles;
SOctreeNode* Child[8];
core::aabbox3d<f32> Box;
};
void constructOctree(SOctreeNode* node);
void deleteEmptyNodes(SOctreeNode* node);
void getTrianglesFromOctree(SOctreeNode* node, s32& trianglesWritten,
s32 maximumSize, const core::aabbox3d<f32>& box,
const core::matrix4* transform,
core::triangle3df* triangles) const;
void getTrianglesFromOctree(SOctreeNode* node, s32& trianglesWritten,
s32 maximumSize, const core::line3d<f32>& line,
const core::matrix4* transform,
core::triangle3df* triangles) const;
SOctreeNode* Root;
s32 NodeCount;
s32 MinimalPolysPerNode;
};
} // end namespace scene
} // end namespace irr
#endif
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