81 lines
2.1 KiB
C++
81 lines
2.1 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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#ifndef __C_OCT_TREE_TRIANGLE_SELECTOR_H_INCLUDED__
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#define __C_OCT_TREE_TRIANGLE_SELECTOR_H_INCLUDED__
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#include "CTriangleSelector.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 ISceneNode;
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//! Stupid triangle selector without optimization
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class COctTreeTriangleSelector : public CTriangleSelector
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{
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public:
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//! Constructs a selector based on a mesh
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COctTreeTriangleSelector(const IMesh* mesh, const ISceneNode* node, s32 minimalPolysPerNode);
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virtual ~COctTreeTriangleSelector();
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//! Gets all triangles which lie within a specific bounding box.
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virtual 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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private:
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struct SOctTreeNode
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{
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SOctTreeNode()
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{
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for (u32 i=0; i!=8; ++i)
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Child[i] = 0;
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}
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~SOctTreeNode()
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{
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for (u32 i=0; i!=8; ++i)
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delete Child[i];
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}
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core::array<core::triangle3df> Triangles;
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SOctTreeNode* Child[8];
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core::aabbox3d<f32> Box;
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};
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void constructOctTree(SOctTreeNode* node);
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void deleteEmptyNodes(SOctTreeNode* node);
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void getTrianglesFromOctTree(SOctTreeNode* node, s32& trianglesWritten,
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s32 maximumSize, const core::aabbox3d<f32>& box,
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const core::matrix4* transform,
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core::triangle3df* triangles) const;
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void getTrianglesFromOctTree(SOctTreeNode* node, s32& trianglesWritten,
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s32 maximumSize, const core::line3d<f32>& line,
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const core::matrix4* transform,
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core::triangle3df* triangles) const;
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SOctTreeNode* Root;
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s32 NodeCount;
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s32 MinimalPolysPerNode;
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};
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} // end namespace scene
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} // end namespace irr
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#endif
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