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#pragma once
#include "Runtime/Geometry/Plane.h"
#include "Runtime/Utilities/dynamic_array.h"
#include "Runtime/Utilities/dense_hash_map.h"
#include <algorithm>
static const float kVoxelHeightMultiplier = 4.f;
struct PlaneData
{
PlaneData () {}
PlaneData (const Plane& plane, int colliderInstanceID, int rigidBodyOrColliderInstanceID)
: m_Plane (plane)
, m_ColliderInstanceID (colliderInstanceID)
, m_RigidBodyOrColliderInstanceID (rigidBodyOrColliderInstanceID)
{}
Plane m_Plane;
int m_ColliderInstanceID;
int m_RigidBodyOrColliderInstanceID;
};
// Collision plane cache using the google dense hashmap
class PlaneColliderCache_dense_hashmap
{
public:
PlaneColliderCache_dense_hashmap ();
~PlaneColliderCache_dense_hashmap () {Clear();}
int Size () const { return m_PlaneHashMap.size(); };
bool Find (const Vector3f& pos, const Vector3f& dir, Plane& plane, int& colliderInstanceID, int& rigidBodyOrColliderInstanceID, float voxelSize) const;
bool Replace (const Vector3f& pos, const Vector3f& dir, const Plane& plane, int colliderInstanceID, int rigidBodyOrColliderInstanceID, float voxelSize);
void Clear ()
{
m_PlaneHashMap.clear ();
}
private:
// Hash map for cached planes
struct UInt64HashFunctor
{
inline size_t operator ()(UInt64 x) const
{
return int(x >> 32);
}
};
typedef std::pair<const UInt64, PlaneData> KeyToPlanePair;
typedef dense_hash_map<UInt64, PlaneData, UInt64HashFunctor, std::equal_to<UInt64>, STL_ALLOCATOR (kMemSTL, KeyToPlanePair) > PlaneHashMap;
PlaneHashMap m_PlaneHashMap;
};
typedef PlaneColliderCache_dense_hashmap PlaneColliderCache;
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