The physics engine manages creating and destroying physics objects for the physics simulation. More...

#include <PhysicsEngine.h>

Public Member Functions
	PhysicsEngine ()
	~PhysicsEngine ()
void	onPhysicsComponentDestroyed (entt::registry &registry, entt::entity entity)
	Cleans up the hit box pointers and motion state if applicable.
void	update (float deltaTimeSeconds)
	Steps the physics simulation by 1/120th of a second. The idea of the engine is that it should run on 120hz so the update rate of the physics engine should be quite close to it.
btDiscreteDynamicsWorld *	getDynamicsWorld () const
	Gets the world where the physics simulation is performed inside.
btRigidBody *	createRigidBody (const RigidBodyCreateInfo &info) const
	Creates a rigid body for the physics simulation.
void	removeRigidBody (btRigidBody *body) const
	Removes a rigid body from the physics simulation.

Static Public Member Functions
static btCollisionShape *	createBoxShape (const glm::vec3 &halfExtents)
	Creates a collision box.
static btCollisionShape *	createSphereShape (float radius)
	Creates a collision sphere.
static btCollisionShape *	createCapsuleShape (float radius, float height)
	creates a capsule with a height and a radius.
static btCollisionShape *	createPlaneShape (const glm::vec3 &surfaceNormal, float distanceFromOrigin)
	Creates a plane from.

Private Attributes
btBroadphaseInterface *	broadphase
btCollisionConfiguration *	collisionConfiguration
btCollisionDispatcher *	dispatcher
btConstraintSolver *	solver
btDiscreteDynamicsWorld *	dynamicsWorld

Detailed Description

The physics engine manages creating and destroying physics objects for the physics simulation.

Author: Konstantin Passig

Date: 31.12.2025

Definition at line 32 of file PhysicsEngine.h.

Constructor & Destructor Documentation

◆ PhysicsEngine()

EngineCore::PhysicsEngine::PhysicsEngine ( )

Definition at line 11 of file PhysicsEngine.cpp.

References broadphase, collisionConfiguration, dispatcher, dynamicsWorld, Ecs::RegistryManager::get(), and solver.

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◆ ~PhysicsEngine()

EngineCore::PhysicsEngine::~PhysicsEngine ( )

Definition at line 24 of file PhysicsEngine.cpp.

References broadphase, collisionConfiguration, dispatcher, dynamicsWorld, and solver.

Member Function Documentation

◆ createBoxShape()

btCollisionShape * EngineCore::PhysicsEngine::createBoxShape ( const glm::vec3 & halfExtents )

static

Creates a collision box.

Parameters

halfExtents xyz half extents

Returns: Pointer to the created collision shape. Needs to be cleaned up by hand

Definition at line 75 of file PhysicsEngine.cpp.

References bt::getVec3().

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◆ createCapsuleShape()

btCollisionShape * EngineCore::PhysicsEngine::createCapsuleShape	(	float	radius,
		float	height )

static

creates a capsule with a height and a radius.

Parameters

radius	in meters
height	in meters

Returns: Pointer to the created collision shape. Needs to be cleaned up by hand

Definition at line 85 of file PhysicsEngine.cpp.

◆ createPlaneShape()

btCollisionShape * EngineCore::PhysicsEngine::createPlaneShape	(	const glm::vec3 &	surfaceNormal,
		float	distanceFromOrigin )

static

Creates a plane from.

Parameters

surfaceNormal	surface normal of the plane
distanceFromOrigin	how much to move the plane along the surface

Returns: Pointer to the created collision shape. Needs to be cleaned up by hand

Definition at line 90 of file PhysicsEngine.cpp.

References bt::getVec3().

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◆ createRigidBody()

btRigidBody * EngineCore::PhysicsEngine::createRigidBody ( const RigidBodyCreateInfo & info ) const

nodiscard

Creates a rigid body for the physics simulation.

Parameters

info	create info which defines how the rigid body should behave in the simulation

Returns: Pointer to the created collision shape. Needs to be cleaned up manually by hand

Definition at line 95 of file PhysicsEngine.cpp.

References dynamicsWorld, EngineCore::RigidBodyCreateInfo::friction, EngineCore::RigidBodyCreateInfo::mass, EngineCore::RigidBodyCreateInfo::restitution, EngineCore::RigidBodyCreateInfo::shape, and EngineCore::RigidBodyCreateInfo::transform.

Referenced by EngineCore::PhysicsBodyComponent::createRigidBody().

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◆ createSphereShape()

btCollisionShape * EngineCore::PhysicsEngine::createSphereShape ( float radius )

static

Creates a collision sphere.

Parameters

radius in meters

Returns: Pointer to the created collision shape. Needs to be cleaned up by hand

Definition at line 80 of file PhysicsEngine.cpp.

◆ getDynamicsWorld()

btDiscreteDynamicsWorld * EngineCore::PhysicsEngine::getDynamicsWorld ( ) const

nodiscard

Gets the world where the physics simulation is performed inside.

Returns: Pointer to the physics world

Definition at line 70 of file PhysicsEngine.cpp.

References dynamicsWorld.

Referenced by EngineCore::PhysicsBodyComponent::processCollisions(), EngineCore::PhysicsBodyComponent::registerCollision(), and EngineCore::PhysicsBodyComponent::unregisterCollision().

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◆ onPhysicsComponentDestroyed()

void EngineCore::PhysicsEngine::onPhysicsComponentDestroyed	(	entt::registry &	registry,
		entt::entity	entity )

Cleans up the hit box pointers and motion state if applicable.

Parameters

registry	which registry the element was destroyed from
entity	which entity the component belonged to

Definition at line 48 of file PhysicsEngine.cpp.

References dynamicsWorld.

◆ removeRigidBody()

void EngineCore::PhysicsEngine::removeRigidBody ( btRigidBody * body ) const

Removes a rigid body from the physics simulation.

Parameters

body	ptr to the rigid body to remove

Definition at line 118 of file PhysicsEngine.cpp.

References dynamicsWorld.

Referenced by EngineCore::PhysicsBodyComponent::destroyRigidBody().

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◆ update()

void EngineCore::PhysicsEngine::update ( float deltaTimeSeconds )

Steps the physics simulation by 1/120th of a second. The idea of the engine is that it should run on 120hz so the update rate of the physics engine should be quite close to it.

Parameters

deltaTimeSeconds time between this and the last frame in seconds

Definition at line 64 of file PhysicsEngine.cpp.

References dynamicsWorld, and TRACY_ZONE_SCOPED_NAMED.

Referenced by EngineCore::Engine::update().

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Member Data Documentation

◆ broadphase

btBroadphaseInterface* EngineCore::PhysicsEngine::broadphase

private

Definition at line 99 of file PhysicsEngine.h.

Referenced by PhysicsEngine(), and ~PhysicsEngine().

◆ collisionConfiguration

btCollisionConfiguration* EngineCore::PhysicsEngine::collisionConfiguration

private

Definition at line 100 of file PhysicsEngine.h.

Referenced by PhysicsEngine(), and ~PhysicsEngine().

◆ dispatcher

btCollisionDispatcher* EngineCore::PhysicsEngine::dispatcher

private

Definition at line 101 of file PhysicsEngine.h.

Referenced by PhysicsEngine(), and ~PhysicsEngine().

◆ dynamicsWorld

btDiscreteDynamicsWorld* EngineCore::PhysicsEngine::dynamicsWorld

private

Definition at line 103 of file PhysicsEngine.h.

Referenced by createRigidBody(), getDynamicsWorld(), onPhysicsComponentDestroyed(), PhysicsEngine(), removeRigidBody(), update(), and ~PhysicsEngine().

◆ solver

btConstraintSolver* EngineCore::PhysicsEngine::solver

private

Definition at line 102 of file PhysicsEngine.h.

Referenced by PhysicsEngine(), and ~PhysicsEngine().

The documentation for this class was generated from the following files:

/home/magerbeton/Documents/gl3-vulkan/Engine/include/Engine/Physics/PhysicsEngine.h
/home/magerbeton/Documents/gl3-vulkan/Engine/src/Engine/Physics/PhysicsEngine.cpp

Public Member Functions

Static Public Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ PhysicsEngine()

◆ ~PhysicsEngine()

Member Function Documentation

◆ createBoxShape()

◆ createCapsuleShape()

◆ createPlaneShape()

◆ createRigidBody()

◆ createSphereShape()

◆ getDynamicsWorld()

◆ onPhysicsComponentDestroyed()

◆ removeRigidBody()

◆ update()

Member Data Documentation

◆ broadphase

◆ collisionConfiguration

◆ dispatcher

◆ dynamicsWorld

◆ solver