William Moberg
55 lines
2.0 KiB
C++
55 lines
2.0 KiB
C++
#ifndef OctTree_h__
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#define OctTree_h__
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#include "Core/AABB.h"
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struct Ray;
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class OctTree
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{
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public:
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struct Output
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{
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float CollideDistance;
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};
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OctTree();
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~OctTree();
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//For the root OctTree, [octTreeBounds] should be a box containing the entire level.
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OctTree(const AABB& octTreeBounds, int subDivisions);
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//We should only ever need one OctTree in the game, and it should not need to be copied.
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//Define these if the OctTree suddenly needs to be copied, think of the children OctTree* ptrs.
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OctTree(const OctTree& other) = delete;
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OctTree(const OctTree&& other) = delete;
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OctTree& operator= (const OctTree& other) = delete;
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void AddDynamicObject(const AABB& box);
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void AddStaticObject(const AABB& box);
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void BoxesInSameRegion(const AABB& box, std::vector<AABB>& outBoxes) const;
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void ClearObjects();
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void ClearDynamicObjects();
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//Returns true if the ray collides with something in the tree. Result is written to [data].
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bool RayCollides(const Ray& ray, Output& data) const;
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//Returns true if the box collides with something in the tree.
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//On collision with a box, that box is written to [outBoxIntersected].
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bool BoxCollides(const AABB& boxToTest, AABB& outBoxIntersected) const;
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private:
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OctTree* m_Children[8];
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//WTODO: Do -derived class from AABB- struct containing AABB, with a bool Tested, falsify at
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//start of Collision test, set on check, don't check if set already. Solves duplicate boxes in tree.
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//Store indices in the struct, pointing to grand ancestor list of boxes, need the same AABB not copies to save Tested.
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//WTODO: Boxes collide with themselves? Fix somehow, maybe float epsilon stuff.
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std::vector<AABB> m_StaticObjects;
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std::vector<AABB> m_DynamicObjects;
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AABB m_Box;
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inline bool hasChildren() const;
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int childIndexContainingPoint(const glm::vec3& point) const;
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std::vector<int> childIndicesContainingBox(const AABB& box) const;
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};
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#endif |