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Basic collisions using Octree. Seems buggy over octree boundaries.

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This commit is contained in:
sippeangelo
2016-01-13 15:34:43 +01:00
parent 8ed4ba1219
commit d6ef527f25
33 changed files with 290 additions and 267 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/Engine/Collision/CollidableOctreeSystem.cpp
+20
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@@ -0,0 +1,20 @@
#include "Collision/CollidableOctreeSystem.h"
void CollidableOctreeSystem::Update(World* world, double dt)
{
m_Octree->ClearDynamicObjects();
}
void CollidableOctreeSystem::UpdateComponent(World* world, ComponentWrapper& cCollidable, double dt)
{
EntityID entity = cCollidable.EntityID;
if (world->HasComponent(entity, "AABB")) {
boost::optional<AABB> absoluteAABB = Collision::EntityAbsoluteAABB(world, entity);
if (absoluteAABB) {
m_Octree->AddDynamicObject(*absoluteAABB);
}
} else if (world->HasComponent(entity, "Model")) {
// TODO: Derive AABB from model
}
}
src/Engine/Collision/Collision.cpp
+15 -37
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@@ -13,7 +13,7 @@ bool RayAABBIntr(const Ray& ray, const AABB& box)
{
glm::vec3 w = 75.0f * ray.Direction();
glm::vec3 v = glm::abs(w);
glm::vec3 c = ray.Origin() - box.Center() + w;
glm::vec3 c = ray.Origin() - box.Origin() + w;
glm::vec3 half = box.HalfSize();
if (abs(c.x) > v.x + half.x) {
@@ -68,8 +68,8 @@ bool RayVsAABB(const Ray& ray, const AABB& box, float& outDistance)
bool AABBVsAABB(const AABB& a, const AABB& b)
{
const glm::vec3& aCenter = a.Center();
const glm::vec3& bCenter = b.Center();
const glm::vec3& aCenter = a.Origin();
const glm::vec3& bCenter = b.Origin();
const glm::vec3& aHSize = a.HalfSize();
const glm::vec3& bHSize = b.HalfSize();
//Test will probably exit because of the X and Z axes more often, so test them first.
@@ -202,8 +202,8 @@ bool RayVsModel(const Ray& ray,
bool IsSameBoxProbably(const AABB& first, const AABB& second, const float epsilon)
{
const glm::vec3& ma1 = first.MaxCorner();
const glm::vec3& ma2 = first.MaxCorner();
const glm::vec3& mi1 = second.MinCorner();
const glm::vec3& ma2 = second.MaxCorner();
const glm::vec3& mi1 = first.MinCorner();
const glm::vec3& mi2 = second.MinCorner();
return (std::abs(ma1.x - ma2.x) < epsilon) &&
(std::abs(mi1.x - mi2.x) < epsilon) &&
@@ -238,45 +238,23 @@ bool attachAABBComponentFromModel(World* world, EntityID id)
mini.y = std::min(wPos.y, mini.y);
mini.z = std::min(wPos.z, mini.z);
}
collision["BoxCenter"] = 0.5f * (maxi + mini);
collision["BoxSize"] = maxi - mini;
collision["Origin"] = 0.5f * (maxi + mini);
collision["Size"] = maxi - mini;
return true;
}
bool GetEntityBox(World* world, ComponentWrapper& AABBComponent, AABB& outBox)
{
ComponentWrapper& cTrans = world->GetComponent(AABBComponent.EntityID, "Transform");
ComponentWrapper model = world->GetComponent(AABBComponent.EntityID, "Model");
Model* modelRes = ResourceManager::Load<Model>(model["Resource"]);
outBox.CreateFromCenter(AABBComponent["BoxCenter"], AABBComponent["BoxSize"]);
glm::vec3 mini = outBox.MinCorner();
glm::vec3 maxi = outBox.MaxCorner();
if (modelRes == nullptr) {
return false;
}
glm::mat4 modelMatrix = modelRes->m_Matrix *
glm::translate(glm::mat4(), (glm::vec3)cTrans["Position"]) *
glm::scale((glm::vec3)cTrans["Scale"]);
outBox = AABB(modelMatrix * glm::vec4(mini.x, mini.y, mini.z, 1),
modelMatrix * glm::vec4(maxi.x, maxi.y, maxi.z, 1));
return true;
}
bool GetEntityBox(World* world, EntityID entity, AABB& outBox, bool forceBoxFromModel)
boost::optional<AABB> EntityAbsoluteAABB(World* world, EntityID entity)
{
if (!world->HasComponent(entity, "AABB")) {
if (forceBoxFromModel) {
if (!attachAABBComponentFromModel(world, entity))
return false;
} else {
return false;
}
return boost::none;
}
ComponentWrapper& cBox = world->GetComponent(entity, "AABB");
return GetEntityBox(world, cBox, outBox);
ComponentWrapper& cAABB = world->GetComponent(entity, "AABB");
glm::vec3 absPosition = RenderQueueFactory::AbsolutePosition(world, entity);
glm::vec3 absScale = RenderQueueFactory::AbsoluteScale(world, entity);
glm::vec3 origin = absPosition + (glm::vec3)cAABB["Origin"];
glm::vec3 size = (glm::vec3)cAABB["Size"] * absScale;
return AABB::FromOriginSize(origin, size);
}
}
src/Engine/Collision/CollisionSystem.cpp
+15 -16
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@@ -2,31 +2,30 @@
#include "Collision/CollisionSystem.h"
#include "Core/AABB.h"
void CollisionSystem::UpdateComponent(World * world, ComponentWrapper & cAABB, double dt)
void CollisionSystem::UpdateComponent(World* world, ComponentWrapper& cAABB, double dt)
{
//Right now, cAABB is a component attached to any entity that should be collideable.
AABB thisBox;
if (!Collision::GetEntityBox(world, cAABB, thisBox)) {
EntityID entity = cAABB.EntityID;
boost::optional<AABB> boundingBox = Collision::EntityAbsoluteAABB(world, entity);
if (!boundingBox) {
return;
}
ComponentWrapper& cTransform = world->GetComponent(entity, "Transform");
AABB& boxA = *boundingBox;
//Press 'Z' to enable/disable collision.
if (zPress) {
return;
}
//Here, mover should be an object that moves, currently only players.
for (auto& mover : *world->GetComponents("Player")) {
if (cAABB.EntityID == mover.EntityID) {
std::vector<AABB> octreeResult;
m_Octree->BoxesInSameRegion(*boundingBox, octreeResult);
for (auto& boxB : octreeResult) {
glm::vec3 resolutionVector;
if (Collision::IsSameBoxProbably(boxA, boxB)) {
continue;
}
AABB otherBox;
if (!Collision::GetEntityBox(world, mover.EntityID, otherBox)) {
continue;
}
glm::vec3 resolveTranslation;
if (Collision::AABBVsAABB(otherBox, thisBox, resolveTranslation)) {
ComponentWrapper& trans = world->GetComponent(mover.EntityID, "Transform");
//TODO: Special treatment if both are movers.
trans["Position"] = (glm::vec3)trans["Position"] + resolveTranslation;
if (Collision::AABBVsAABB(boxA, boxB, resolutionVector)) {
(glm::vec3&)cTransform["Position"] += resolutionVector;
}
}
}
src/Engine/Collision/TriggerSystem.cpp
+10 -11
View File
@@ -3,27 +3,27 @@
#include "Core/AABB.h"
#include "Rendering/Model.h"
void TriggerSystem::UpdateComponent(World* world, ComponentWrapper& trigger, double dt)
void TriggerSystem::UpdateComponent(World* world, ComponentWrapper& cTrigger, double dt)
{
//Currently only players can trigger things.
auto players = world->GetComponents("Player");
if (players == nullptr) {
return;
}
EntityID tId = trigger.EntityID;
AABB triggerBox;
EntityID tId = cTrigger.EntityID;
boost::optional<AABB> triggerBox = Collision::EntityAbsoluteAABB(world, tId);
//The trigger *should* have a bounding box, or something, to test against so it can be triggered.
if (!Collision::GetEntityBox(world, tId, triggerBox, true)) {
if (!triggerBox) {
return;
}
for (auto& pc : *players) {
EntityID pId = pc.EntityID;
AABB playerBox;
boost::optional<AABB> playerBox = Collision::EntityAbsoluteAABB(world, pId);
//The player can't trigger anything without an AABB.
if (!Collision::GetEntityBox(world, pId, playerBox, true)) {
if (!playerBox) {
continue;
}
if (!Collision::AABBVsAABB(triggerBox, playerBox)) {
if (!Collision::AABBVsAABB(*triggerBox, *playerBox)) {
//Entity is not touching the trigger,
//Throw event if it was previously.
if (throwLeaveIfWasInTrigger(m_EntitiesTouchingTrigger[tId], pId, tId)) {
@@ -34,10 +34,9 @@ void TriggerSystem::UpdateComponent(World* world, ComponentWrapper& trigger, dou
throwLeaveIfWasInTrigger(m_EntitiesCompletelyInTrigger[tId], pId, tId);
} else {
//Entity is at least touching the trigger.
AABB completelyInsideBox;
completelyInsideBox.CreateFromCenter(triggerBox.Center(), triggerBox.Size() - 2.0f * playerBox.Size());
if (Collision::AABBVsAABB(completelyInsideBox, playerBox) &&
glm::all(glm::greaterThan(triggerBox.Size(), playerBox.Size()))) {
AABB completelyInsideBox = AABB::FromOriginSize((*triggerBox).Origin(), (*triggerBox).Size() - 2.0f * (*playerBox).Size());
if (Collision::AABBVsAABB(completelyInsideBox, *playerBox) &&
glm::all(glm::greaterThan((*triggerBox).Size(), (*playerBox).Size()))) {
//Entity is completely inside the trigger.
//If it was only touching before, it is erased.
m_EntitiesTouchingTrigger[tId].erase(pId);
src/Engine/Core/AABB.cpp
+5 -8
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@@ -4,7 +4,7 @@
AABB::AABB(const glm::vec3& minPos, const glm::vec3& maxPos)
: m_MinCorner(minPos)
, m_MaxCorner(maxPos)
, m_Center(0.5f * (maxPos + minPos))
, m_Origin(0.5f * (maxPos + minPos))
, m_HalfSize(0.5f * (maxPos - minPos))
{
DEBUG_IF(glm::any(glm::lessThan(m_MaxCorner, m_MinCorner))) {
@@ -20,15 +20,12 @@ AABB::AABB(const glm::vec3& minPos, const glm::vec3& maxPos)
AABB::AABB(const glm::vec4& minPos, const glm::vec4& maxPos)
: AABB(glm::vec3(minPos), glm::vec3(maxPos))
{}
{ }
void AABB::CreateFromCenter(const glm::vec3& center, const glm::vec3& size)
AABB AABB::FromOriginSize(const glm::vec3& origin, const glm::vec3& size)
{
m_Center = center;
m_HalfSize = 0.5f * size;
m_MinCorner = m_Center - m_HalfSize;
m_MaxCorner = m_Center + m_HalfSize;
return AABB(origin - (size/2.f), origin + (size/2.f));
}
AABB::~AABB()
{}
{ }
src/Engine/Core/Octree.cpp
+4 -8
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@@ -21,14 +21,10 @@ bool isFirstLower(const ChildInfo& first, const ChildInfo& second)
}
Octree::Octree()
: Octree(AABB(), 0)
{}
Octree::Octree(const AABB& octTreeBounds, int subDivisions)
: m_Root(new Child(octTreeBounds, subDivisions, m_StaticObjects, m_DynamicObjects))
, m_UpdatedOnce(false)
{}
{ }
Octree::~Octree()
{
@@ -107,7 +103,7 @@ Octree::Child::Child(const AABB& octTreeBounds,
glm::vec3 minPos, maxPos;
const glm::vec3& parentMin = m_Box.MinCorner();
const glm::vec3& parentMax = m_Box.MaxCorner();
const glm::vec3& parentCenter = m_Box.Center();
const glm::vec3& parentCenter = m_Box.Origin();
std::bitset<3> bits(i);
//If child is 4,5,6,7.
if (bits.test(2)) {
@@ -192,7 +188,7 @@ bool Octree::Child::RayCollides(const Ray& ray, Output& data) const
std::vector<ChildInfo> childInfos;
childInfos.reserve(8);
for (int i = 0; i < 8; ++i) {
childInfos.push_back({ i, glm::distance(ray.Origin(), m_Children[i]->m_Box.Center()) });
childInfos.push_back({ i, glm::distance(ray.Origin(), m_Children[i]->m_Box.Origin()) });
}
std::sort(childInfos.begin(), childInfos.end(), isFirstLower);
//Loop through the children, starting with the one closest to the ray origin. I.e the first to be hit.
@@ -329,7 +325,7 @@ void Octree::Child::ClearDynamicObjects()
// z : - + - + - + - +
int Octree::Child::childIndexContainingPoint(const glm::vec3& point) const
{
const glm::vec3& c = m_Box.Center();
const glm::vec3& c = m_Box.Origin();
return (1 << 2) * (point.x >= c.x) | (1 << 1) * (point.y >= c.y) | (point.z >= c.z);
}
src/Engine/Editor/EditorSystem.cpp
+2 -1
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@@ -3,7 +3,8 @@
#include <imgui/imgui_internal.h>
EditorSystem::EditorSystem(EventBroker* eventBroker, IRenderer* renderer)
: ImpureSystem(eventBroker)
: System(eventBroker)
, ImpureSystem()
, m_Renderer(renderer)
{
auto config = ResourceManager::Load<ConfigFile>("Config.ini");