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Can add any objects that inherit from AABB into the Octree.

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This commit is contained in:
William Moberg
2016-01-19 14:50:46 +01:00
parent 621d935d7a
commit 713ebbe18c
8 changed files with 224 additions and 189 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/Engine/Collision/CollidableOctreeSystem.h
+2 -2
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@@ -8,7 +8,7 @@
class CollidableOctreeSystem : public ImpureSystem, public PureSystem
{
public:
CollidableOctreeSystem(EventBroker* eventBroker, Octree* octree)
CollidableOctreeSystem(EventBroker* eventBroker, Octree<AABB>* octree)
: System(eventBroker)
, PureSystem("Collidable")
, m_Octree(octree)
@@ -18,7 +18,7 @@ public:
virtual void UpdateComponent(World* world, EntityWrapper& entity, ComponentWrapper& component, double dt) override;
private:
Octree* m_Octree;
Octree<AABB>* m_Octree;
};
#endif
include/Engine/Collision/CollisionSystem.h
+2 -2
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@@ -13,7 +13,7 @@
class CollisionSystem : public PureSystem
{
public:
CollisionSystem(EventBroker* eventBroker, Octree* octree)
CollisionSystem(EventBroker* eventBroker, Octree<AABB>* octree)
: System(eventBroker)
, PureSystem("Collidable")
, m_Octree(octree)
@@ -26,7 +26,7 @@ public:
virtual void UpdateComponent(World* world, EntityWrapper& entity, ComponentWrapper& component, double dt) override;
private:
Octree* m_Octree;
Octree<AABB>* m_Octree;
bool zPress;
EventRelay<CollisionSystem, Events::KeyUp> m_EKeyUp;
include/Engine/Collision/TriggerSystem.h
+2 -2
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@@ -14,7 +14,7 @@ class AABB;
class TriggerSystem : public PureSystem
{
public:
TriggerSystem(EventBroker* eventBroker, Octree* octree)
TriggerSystem(EventBroker* eventBroker, Octree<AABB>* octree)
: System(eventBroker)
, PureSystem("Trigger")
, m_Octree(octree)
@@ -27,7 +27,7 @@ public:
virtual void UpdateComponent(World* world, EntityWrapper& entity, ComponentWrapper& component, double dt) override;
private:
Octree* m_Octree;
Octree<AABB>* m_Octree;
std::unordered_map<EntityID, std::unordered_set<EntityID>> m_EntitiesTouchingTrigger;
std::unordered_map<EntityID, std::unordered_set<EntityID>> m_EntitiesCompletelyInTrigger;
include/Engine/Core/Octree.h
+193 -65
View File
@@ -1,19 +1,27 @@
#ifndef Octree_h__
#define Octree_h__
#include <type_traits>
#include "../Common.h"
#include "AABB.h"
//Fwd declarations.
class Ray;
namespace OctSpace
{
struct Output;
struct ContainedObject;
struct Child;
}
//T needs to be AABB, or inherit from AABB.
//T also needs to have a default constructor.
template<typename T>
class Octree
{
public:
struct Output
{
float CollideDistance;
};
Octree() = delete;
~Octree();
//For the root Octree, [octreeBounds] should be a box containing the entire level.
@@ -25,81 +33,201 @@ public:
Octree(const Octree&& other) = delete;
Octree& operator= (const Octree& other) = delete;
//Add a dynamic object (one that moves around) into the tree.
void AddDynamicObject(const AABB& box);
void AddDynamicObject(const T& object);
//Add a static object (that does not move) into the tree.
void AddStaticObject(const AABB& box);
//Get the boxes that are in the same area as the input [box], the boxes are put in [outBoxes].
void BoxesInSameRegion(const AABB& box, std::vector<AABB>& outBoxes);
void AddStaticObject(const T& object);
//Get the objects that are in the same area as the input [box], the objects are put in [outObjects].
//The type Box must be AABB, or inherit from AABB.
template<typename Box>
void ObjectsInSameRegion(const Box& box, std::vector<T>& outObjects);
//Empty the tree of all objects, static and dynamic.
void ClearObjects();
//Empty the tree of all dynamic objects. Static objects remain in the tree.
void ClearDynamicObjects();
//Returns true if the ray collides with something in the tree. Result is written to [data].
bool RayCollides(const Ray& ray, Output& data);
bool RayCollides(const Ray& ray, OctSpace::Output& data);
//Returns true if the box collides with something in the tree.
//On collision with a box, that box is written to [outBoxIntersected].
//Note: More efficient than calling BoxesInSameRegion from outside and testing there.
//Note: More efficient than calling ObjectsInSameRegion from outside and testing there.
bool BoxCollides(const AABB& boxToTest, AABB& outBoxIntersected);
private:
struct Child; //Fwd declaration;
struct ContainedObject
{
ContainedObject()
: Box(AABB())
, Checked(false)
{}
ContainedObject(AABB box)
: Box(box)
, Checked(false)
{}
AABB Box;
bool Checked;
};
Child* m_Root;
std::vector<ContainedObject> m_StaticObjects;
std::vector<ContainedObject> m_DynamicObjects;
bool m_UpdatedOnce;
unsigned int m_BoxID;
glm::vec3 m_PrevPos;
glm::quat m_PrevOri;
OctSpace::Child* m_Root;
std::vector<OctSpace::ContainedObject> m_StaticObjects;
std::vector<OctSpace::ContainedObject> m_DynamicObjects;
void falsifyObjectChecks();
struct Child
{
~Child();
Child(const AABB& octTreeBounds,
int subDivisions,
std::vector<Octree::ContainedObject>& staticObjects,
std::vector<Octree::ContainedObject>& dynamicObjects);
Child(const Child& other) = delete;
Child(const Child&& other) = delete;
Child& operator= (const Child& other) = delete;
void AddDynamicObject(const AABB& box);
void AddStaticObject(const AABB& box);
void BoxesInSameRegion(const AABB& box, std::vector<AABB>& outBoxes) const;
void ClearObjects();
void ClearDynamicObjects();
bool RayCollides(const Ray& ray, Output& data) const;
bool BoxCollides(const AABB& boxToTest, AABB& outBoxIntersected) const;
Child* m_Children[8];
//Indices into the lists in Octree.
std::vector<int> m_StaticObjIndices;
std::vector<int> m_DynamicObjIndices;
AABB m_Box;
//Reference to the lists in Octree.
std::vector<Octree::ContainedObject>& m_StaticObjectsRef;
std::vector<Octree::ContainedObject>& m_DynamicObjectsRef;
inline bool hasChildren() const;
int childIndexContainingPoint(const glm::vec3& point) const;
std::vector<int> childIndicesContainingBox(const AABB& box) const;
};
};
namespace OctSpace
{
struct Output
{
float CollideDistance;
};
struct ContainedObject
{
ContainedObject()
: Box(nullptr)
, Checked(false)
{}
template<typename BoxlikeObject>
ContainedObject(const BoxlikeObject& box)
: Box(new BoxlikeObject(box))
, Checked(false)
{}
std::unique_ptr<AABB> Box;
bool Checked;
};
struct Child
{
~Child();
Child(const AABB& octTreeBounds,
int subDivisions,
std::vector<ContainedObject>& staticObjects,
std::vector<ContainedObject>& dynamicObjects);
Child(const Child& other) = delete;
Child(const Child&& other) = delete;
Child& operator= (const Child& other) = delete;
void AddDynamicObject(const AABB& box);
void AddStaticObject(const AABB& box);
template<typename T, typename Box>
void ObjectsInSameRegion(const Box& box, std::vector<T>& outObjects) const;
void ClearObjects();
void ClearDynamicObjects();
bool RayCollides(const Ray& ray, Output& data) const;
bool BoxCollides(const AABB& boxToTest, AABB& outBoxIntersected) const;
Child* m_Children[8];
//Indices into the lists in Octree.
std::vector<int> m_StaticObjIndices;
std::vector<int> m_DynamicObjIndices;
AABB m_Box;
//Reference to the lists in Octree.
std::vector<ContainedObject>& m_StaticObjectsRef;
std::vector<ContainedObject>& m_DynamicObjectsRef;
inline bool hasChildren() const;
int childIndexContainingPoint(const glm::vec3& point) const;
std::vector<int> childIndicesContainingBox(const AABB& box) const;
};
}
template<typename T>
Octree<T>::Octree(const AABB& octTreeBounds, int subDivisions)
: m_Root(new OctSpace::Child(octTreeBounds, subDivisions, m_StaticObjects, m_DynamicObjects))
{
static_assert(std::is_base_of<AABB, T>::value, "template argument type T in Octree must be a subclass of AABB.");
}
template<typename T>
Octree<T>::~Octree()
{
delete m_Root;
}
template<typename T>
void Octree<T>::AddDynamicObject(const T& object)
{
m_Root->AddDynamicObject(object);
m_DynamicObjects.emplace_back(object);
}
template<typename T>
void Octree<T>::AddStaticObject(const T& object)
{
m_Root->AddStaticObject(object);
m_StaticObjects.emplace_back(object);
}
template<typename T>
template<typename Box>
void Octree<T>::ObjectsInSameRegion(const Box& box, std::vector<T>& outObjects)
{
static_assert(std::is_base_of<AABB, Box>::value, "template argument type Box in Octree<T>::ObjectsInSameRegion must be a subclass of AABB.");
falsifyObjectChecks();
m_Root->ObjectsInSameRegion(box, outObjects);
}
template<typename T>
void Octree<T>::ClearObjects()
{
m_StaticObjects.clear();
m_DynamicObjects.clear();
m_Root->ClearObjects();
}
template<typename T>
void Octree<T>::ClearDynamicObjects()
{
m_DynamicObjects.clear();
m_Root->ClearDynamicObjects();
}
template<typename T>
bool Octree<T>::RayCollides(const Ray& ray, OctSpace::Output& data)
{
falsifyObjectChecks();
data.CollideDistance = -1;
return m_Root->RayCollides(ray, data);
}
template<typename T>
bool Octree<T>::BoxCollides(const AABB& boxToTest, AABB& outBoxIntersected)
{
falsifyObjectChecks();
return m_Root->BoxCollides(boxToTest, outBoxIntersected);
}
template<typename T>
void Octree<T>::falsifyObjectChecks()
{
for (auto& obj : m_StaticObjects) {
obj.Checked = false;
}
for (auto& obj : m_DynamicObjects) {
obj.Checked = false;
}
}
template<typename T, typename Box>
void OctSpace::Child::ObjectsInSameRegion(const Box& box, std::vector<T>& outObjects) const
{
if (hasChildren()) {
for (auto i : childIndicesContainingBox(box)) {
m_Children[i]->ObjectsInSameRegion(box, outObjects);
}
} else {
size_t startIndex = outObjects.size();
int numDuplicates = 0;
outObjects.resize(outObjects.size() + m_StaticObjIndices.size() + m_DynamicObjIndices.size());
for (size_t i = 0; i < m_StaticObjIndices.size(); ++i) {
ContainedObject& obj = m_StaticObjectsRef[m_StaticObjIndices[i]];
if (obj.Checked) {
++numDuplicates;
} else {
obj.Checked = true;
outObjects[startIndex + i - numDuplicates] = *static_cast<T*>(obj.Box.get());
}
}
for (size_t i = 0; i < m_DynamicObjIndices.size(); ++i) {
ContainedObject& obj = m_DynamicObjectsRef[m_DynamicObjIndices[i]];
if (obj.Checked) {
++numDuplicates;
} else {
obj.Checked = true;
outObjects[startIndex + i - numDuplicates] = *static_cast<T*>(obj.Box.get());
}
}
for (size_t i = 0; i < numDuplicates; ++i) {
outObjects.pop_back();
}
}
}
#endif
include/Game/Game.h
+2 -2
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@@ -47,8 +47,8 @@ private:
InputProxy* m_InputProxy;
GUI::Frame* m_FrameStack;
World* m_World;
Octree* m_OctreeCollision;
Octree* m_OctreeFrustrumCulling;
Octree<AABB>* m_OctreeCollision;
Octree<AABB>* m_OctreeFrustrumCulling;
SystemPipeline* m_SystemPipeline;
RenderFrame* m_RenderFrame;
// Network variables
src/Engine/Collision/CollisionSystem.cpp
+1 -1
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@@ -23,7 +23,7 @@ void CollisionSystem::UpdateComponent(World* world, EntityWrapper& entity, Compo
// Collide against octree
std::vector<AABB> octreeResult;
m_Octree->BoxesInSameRegion(*boundingBox, octreeResult);
m_Octree->ObjectsInSameRegion(*boundingBox, octreeResult);
for (auto& boxB : octreeResult) {
glm::vec3 resolutionVector;
if (Collision::IsSameBoxProbably(boxA, boxB)) {
src/Engine/Core/Octree.cpp
+20 -113
View File
@@ -21,72 +21,11 @@ bool isFirstLower(const ChildInfo& first, const ChildInfo& second)
}
Octree::Octree(const AABB& octTreeBounds, int subDivisions)
: m_Root(new Child(octTreeBounds, subDivisions, m_StaticObjects, m_DynamicObjects))
, m_UpdatedOnce(false)
{ }
Octree::~Octree()
namespace OctSpace
{
delete m_Root;
}
void Octree::AddDynamicObject(const AABB& box)
{
m_Root->AddDynamicObject(box);
m_DynamicObjects.push_back(box);
}
void Octree::AddStaticObject(const AABB& box)
{
m_Root->AddStaticObject(box);
m_StaticObjects.push_back(box);
}
void Octree::BoxesInSameRegion(const AABB& box, std::vector<AABB>& outBoxes)
{
falsifyObjectChecks();
m_Root->BoxesInSameRegion(box, outBoxes);
}
void Octree::ClearObjects()
{
m_StaticObjects.clear();
m_DynamicObjects.clear();
m_Root->ClearObjects();
}
void Octree::ClearDynamicObjects()
{
m_DynamicObjects.clear();
m_Root->ClearDynamicObjects();
}
bool Octree::RayCollides(const Ray& ray, Output& data)
{
falsifyObjectChecks();
data.CollideDistance = -1;
return m_Root->RayCollides(ray, data);
}
bool Octree::BoxCollides(const AABB& boxToTest, AABB& outBoxIntersected)
{
falsifyObjectChecks();
return m_Root->BoxCollides(boxToTest, outBoxIntersected);
}
void Octree::falsifyObjectChecks()
{
for (auto& obj : m_StaticObjects) {
obj.Checked = false;
}
for (auto& obj : m_DynamicObjects) {
obj.Checked = false;
}
}
Octree::Child::Child(const AABB& octTreeBounds,
int subDivisions,
Child::Child(const AABB& octTreeBounds,
int subDivisions,
std::vector<ContainedObject>& staticObjects,
std::vector<ContainedObject>& dynamicObjects)
: m_Box(octTreeBounds)
@@ -135,7 +74,7 @@ Octree::Child::Child(const AABB& octTreeBounds,
}
}
Octree::Child::~Child()
Child::~Child()
{
for (Child*& c : m_Children) {
if (c != nullptr) {
@@ -145,7 +84,7 @@ Octree::Child::~Child()
}
}
bool Octree::Child::BoxCollides(const AABB& boxToTest, AABB& outBoxIntersected) const
bool Child::BoxCollides(const AABB& boxToTest, AABB& outBoxIntersected) const
{
if (hasChildren()) {
for (int i : childIndicesContainingBox(boxToTest)) {
@@ -155,7 +94,7 @@ bool Octree::Child::BoxCollides(const AABB& boxToTest, AABB& outBoxIntersected)
} else {
for (int i : m_StaticObjIndices) {
if (!m_StaticObjectsRef[i].Checked) {
const AABB& objBox = m_StaticObjectsRef[i].Box;
const AABB& objBox = *m_StaticObjectsRef[i].Box;
if (Collision::AABBVsAABB(boxToTest, objBox)) {
outBoxIntersected = objBox;
return true;
@@ -165,7 +104,7 @@ bool Octree::Child::BoxCollides(const AABB& boxToTest, AABB& outBoxIntersected)
}
for (int i : m_DynamicObjIndices) {
if (!m_DynamicObjectsRef[i].Checked) {
const AABB& objBox = m_DynamicObjectsRef[i].Box;
const AABB& objBox = *m_DynamicObjectsRef[i].Box;
if (!Collision::IsSameBoxProbably(boxToTest, objBox) &&
Collision::AABBVsAABB(boxToTest, objBox)) {
outBoxIntersected = objBox;
@@ -178,7 +117,7 @@ bool Octree::Child::BoxCollides(const AABB& boxToTest, AABB& outBoxIntersected)
return false;
}
bool Octree::Child::RayCollides(const Ray& ray, Output& data) const
bool Child::RayCollides(const Ray& ray, OctSpace::Output& data) const
{
//If the node AABB is missed, everything it contains is missed.
if (Collision::RayAABBIntr(ray, m_Box)) {
@@ -205,7 +144,7 @@ bool Octree::Child::RayCollides(const Ray& ray, Output& data) const
float dist;
//If we haven't tested against this object before, and the ray hits.
if (!m_StaticObjectsRef[i].Checked &&
Collision::RayVsAABB(ray, m_StaticObjectsRef[i].Box, dist)) {
Collision::RayVsAABB(ray, *m_StaticObjectsRef[i].Box, dist)) {
minDist = std::min(dist, minDist);
intersected = true;
}
@@ -215,7 +154,7 @@ bool Octree::Child::RayCollides(const Ray& ray, Output& data) const
float dist;
//If we haven't tested against this object before, and the ray hits.
if (!m_DynamicObjectsRef[i].Checked &&
Collision::RayVsAABB(ray, m_DynamicObjectsRef[i].Box, dist)) {
Collision::RayVsAABB(ray, *m_DynamicObjectsRef[i].Box, dist)) {
minDist = std::min(dist, minDist);
intersected = true;
}
@@ -230,7 +169,7 @@ bool Octree::Child::RayCollides(const Ray& ray, Output& data) const
}
void Octree::Child::AddDynamicObject(const AABB& box)
void Child::AddDynamicObject(const AABB& box)
{
if (hasChildren()) {
for (auto i : childIndicesContainingBox(box)) {
@@ -242,7 +181,7 @@ void Octree::Child::AddDynamicObject(const AABB& box)
}
}
void Octree::Child::AddStaticObject(const AABB& box)
void Child::AddStaticObject(const AABB& box)
{
if (hasChildren()) {
for (auto i : childIndicesContainingBox(box)) {
@@ -254,41 +193,7 @@ void Octree::Child::AddStaticObject(const AABB& box)
}
}
void Octree::Child::BoxesInSameRegion(const AABB& box, std::vector<AABB>& outBoxes) const
{
if (hasChildren()) {
for (auto i : childIndicesContainingBox(box)) {
m_Children[i]->BoxesInSameRegion(box, outBoxes);
}
} else {
size_t startIndex = outBoxes.size();
int numDuplicates = 0;
outBoxes.resize(outBoxes.size() + m_StaticObjIndices.size() + m_DynamicObjIndices.size());
for (size_t i = 0; i < m_StaticObjIndices.size(); ++i){
ContainedObject& obj = m_StaticObjectsRef[m_StaticObjIndices[i]];
if (obj.Checked) {
++numDuplicates;
} else {
obj.Checked = true;
outBoxes[startIndex + i - numDuplicates] = obj.Box;
}
}
for (size_t i = 0; i < m_DynamicObjIndices.size(); ++i) {
ContainedObject& obj = m_DynamicObjectsRef[m_DynamicObjIndices[i]];
if (obj.Checked) {
++numDuplicates;
} else {
obj.Checked = true;
outBoxes[startIndex + i - numDuplicates] = obj.Box;
}
}
for (size_t i = 0; i < numDuplicates; ++i) {
outBoxes.pop_back();
}
}
}
void Octree::Child::ClearObjects()
void Child::ClearObjects()
{
if (hasChildren()) {
for (Child*& c : m_Children) {
@@ -300,11 +205,11 @@ void Octree::Child::ClearObjects()
}
}
void Octree::Child::ClearDynamicObjects()
void Child::ClearDynamicObjects()
{
if (hasChildren()) {
for (Child*& c : m_Children) {
c->ClearObjects();
c->ClearDynamicObjects();
}
} else {
m_DynamicObjIndices.clear();
@@ -323,13 +228,13 @@ void Octree::Child::ClearDynamicObjects()
// x : - - - - + + + +
// y : - - + + - - + +
// z : - + - + - + - +
int Octree::Child::childIndexContainingPoint(const glm::vec3& point) const
int Child::childIndexContainingPoint(const glm::vec3& point) const
{
const glm::vec3& c = m_Box.Origin();
return (1 << 2) * (point.x >= c.x) | (1 << 1) * (point.y >= c.y) | (point.z >= c.z);
}
std::vector<int> Octree::Child::childIndicesContainingBox(const AABB& box) const
std::vector<int> Child::childIndicesContainingBox(const AABB& box) const
{
int minInd = childIndexContainingPoint(box.MinCorner());
int maxInd = childIndexContainingPoint(box.MaxCorner());
@@ -371,7 +276,9 @@ std::vector<int> Octree::Child::childIndicesContainingBox(const AABB& box) const
}
}
inline bool Octree::Child::hasChildren() const
inline bool Child::hasChildren() const
{
return m_Children[0] != nullptr;
}
}
src/Game/Game.cpp
+2 -2
View File
@@ -68,8 +68,8 @@ Game::Game(int argc, char* argv[])
m_Renderer->m_World = m_World;
// Create Octrees
m_OctreeCollision = new Octree(AABB(glm::vec3(-100), glm::vec3(100)), 4);
m_OctreeFrustrumCulling = new Octree(AABB(glm::vec3(-100), glm::vec3(100)), 4);
m_OctreeCollision = new Octree<AABB>(AABB(glm::vec3(-100), glm::vec3(100)), 4);
m_OctreeFrustrumCulling = new Octree<AABB>(AABB(glm::vec3(-100), glm::vec3(100)), 4);
// Create system pipeline
m_SystemPipeline = new SystemPipeline(m_EventBroker);