Merge branch 'jaro/collision-system' of github.com:lonkaars/crepe

15 files changed, 1034 insertions, 46 deletions

diff --git a/src/crepe/Collider.cpp b/src/crepe/Collider.cpp
index bbec488..77e11c8 100644
--- a/src/crepe/Collider.cpp
+++ b/src/crepe/Collider.cpp
@@ -2,4 +2,4 @@
 
 using namespace crepe;
 
-Collider::Collider(game_object_id_t id) : Component(id) {}
+Collider::Collider(game_object_id_t id, const vec2 & offset) : Component(id), offset(offset) {}
diff --git a/src/crepe/Collider.h b/src/crepe/Collider.h
index 827f83d..a08a68e 100644
--- a/src/crepe/Collider.h
+++ b/src/crepe/Collider.h
@@ -1,14 +1,23 @@
 #pragma once
 
 #include "Component.h"
+#include "types.h"
 
 namespace crepe {
 
 class Collider : public Component {
 public:
-	Collider(game_object_id_t id);
+	Collider(game_object_id_t id, const vec2 & offset);
 
-	int size;
+public:
+	/**
+	* \brief Offset of the collider relative to the rigidbody position.
+	*
+	* The `offset` defines the positional shift applied to the collider relative to the position of the rigidbody it is attached to.
+	* This allows the collider to be placed at a different position than the rigidbody.
+	* 
+	*/
+	vec2 offset;
 };
 
 } // namespace crepe
diff --git a/src/crepe/api/BoxCollider.cpp b/src/crepe/api/BoxCollider.cpp
new file mode 100644
index 0000000..c097a24
--- /dev/null
+++ b/src/crepe/api/BoxCollider.cpp
@@ -0,0 +1,10 @@
+#include "BoxCollider.h"
+
+#include "../Collider.h"
+
+using namespace crepe;
+
+BoxCollider::BoxCollider(game_object_id_t game_object_id, const vec2 & offset,
+						 const vec2 & dimensions)
+	: Collider(game_object_id, offset),
+	  dimensions(dimensions) {}
diff --git a/src/crepe/api/BoxCollider.h b/src/crepe/api/BoxCollider.h
new file mode 100644
index 0000000..89e43d8
--- /dev/null
+++ b/src/crepe/api/BoxCollider.h
@@ -0,0 +1,22 @@
+#pragma once
+
+#include "../Collider.h"
+#include "Vector2.h"
+#include "types.h"
+
+namespace crepe {
+
+/**
+ * \brief A class representing a box-shaped collider.
+ * 
+ * This class is used for collision detection with other colliders (e.g., CircleCollider).
+ */
+class BoxCollider : public Collider {
+public:
+	BoxCollider(game_object_id_t game_object_id, const vec2 & offset, const vec2 & dimensions);
+
+	//! Width and height of the box collider
+	vec2 dimensions;
+};
+
+} // namespace crepe
diff --git a/src/crepe/api/CMakeLists.txt b/src/crepe/api/CMakeLists.txt
index ac8f301..b2e3df8 100644
--- a/src/crepe/api/CMakeLists.txt
+++ b/src/crepe/api/CMakeLists.txt
@@ -13,6 +13,8 @@ target_sources(crepe PUBLIC
 	Metadata.cpp
 	Camera.cpp
 	Animator.cpp
+	BoxCollider.cpp
+	CircleCollider.cpp
 	IKeyListener.cpp
 	IMouseListener.cpp
 	LoopManager.cpp
@@ -44,6 +46,8 @@ target_sources(crepe PUBLIC FILE_SET HEADERS FILES
 	Metadata.h
 	Camera.h
 	Animator.h
+	BoxCollider.h
+	CircleCollider.h
 	EventHandler.h
 	EventHandler.hpp
 	Event.h
diff --git a/src/crepe/api/CircleCollider.cpp b/src/crepe/api/CircleCollider.cpp
new file mode 100644
index 0000000..a4271e9
--- /dev/null
+++ b/src/crepe/api/CircleCollider.cpp
@@ -0,0 +1,8 @@
+#include "CircleCollider.h"
+
+using namespace crepe;
+
+CircleCollider::CircleCollider(game_object_id_t game_object_id, const vec2 & offset,
+							   float radius)
+	: Collider(game_object_id, offset),
+	  radius(radius) {}
diff --git a/src/crepe/api/CircleCollider.h b/src/crepe/api/CircleCollider.h
index e77a592..ebd1cb2 100644
--- a/src/crepe/api/CircleCollider.h
+++ b/src/crepe/api/CircleCollider.h
@@ -1,14 +1,22 @@
 #pragma once
+
+#include "Vector2.h"
+
 #include "../Collider.h"
 
 namespace crepe {
 
+/**
+ * \brief A class representing a circle-shaped collider.
+ * 
+ * This class is used for collision detection with other colliders (e.g., BoxCollider).
+ */
 class CircleCollider : public Collider {
 public:
-	CircleCollider(game_object_id_t game_object_id, int radius)
-		: Collider(game_object_id),
-		  radius(radius) {}
-	int radius;
+	CircleCollider(game_object_id_t game_object_id, const vec2 & offset, float radius);
+
+	//! Radius of the circle collider.
+	float radius;
 };
 
 } // namespace crepe
diff --git a/src/crepe/api/Event.h b/src/crepe/api/Event.h
index 6298118..f2f3daf 100644
--- a/src/crepe/api/Event.h
+++ b/src/crepe/api/Event.h
@@ -112,10 +112,6 @@ public:
 	//! scroll amount in y axis (from and away from the person).
 	float scroll_delta = 0;
 };
-/**
- * \brief Event triggered during a collision between objects.
- */
-class CollisionEvent : public Event {};
 
 /**
  * \brief Event triggered when text is submitted, e.g., from a text input.
diff --git a/src/crepe/api/LoopManager.cpp b/src/crepe/api/LoopManager.cpp
index 8fef0c4..8ccc0a4 100644
--- a/src/crepe/api/LoopManager.cpp
+++ b/src/crepe/api/LoopManager.cpp
@@ -5,6 +5,7 @@
 #include "../system/PhysicsSystem.h"
 #include "../system/RenderSystem.h"
 #include "../system/ScriptSystem.h"
+#include "manager/EventManager.h"
 
 #include "LoopManager.h"
 
@@ -29,7 +30,14 @@ void LoopManager::start() {
 }
 void LoopManager::set_running(bool running) { this->game_running = running; }
 
-void LoopManager::fixed_update() {}
+void LoopManager::fixed_update() {
+	// TODO: retrieve EventManager from direct member after singleton refactor
+	EventManager & ev = this->mediator.event_manager;
+	ev.dispatch_events();
+	this->get_system<ScriptSystem>().update();
+	this->get_system<PhysicsSystem>().update();
+	this->get_system<CollisionSystem>().update();
+}
 
 void LoopManager::loop() {
 	LoopTimer & timer = this->loop_timer;
@@ -53,8 +61,8 @@ void LoopManager::loop() {
 
 void LoopManager::setup() {
 	LoopTimer & timer = this->loop_timer;
-
 	this->game_running = true;
+	this->scene_manager.load_next_scene();
 	timer.start();
 	timer.set_fps(200);
 }
diff --git a/src/crepe/api/Rigidbody.cpp b/src/crepe/api/Rigidbody.cpp
index 576ca45..8213afb 100644
--- a/src/crepe/api/Rigidbody.cpp
+++ b/src/crepe/api/Rigidbody.cpp
@@ -10,6 +10,4 @@ void crepe::Rigidbody::add_force_linear(const vec2 & force) {
 	this->data.linear_velocity += force;
 }
 
-void crepe::Rigidbody::add_force_angular(double force) {
-	this->data.angular_velocity += force;
-}
+void crepe::Rigidbody::add_force_angular(float force) { this->data.angular_velocity += force; }
diff --git a/src/crepe/api/Rigidbody.h b/src/crepe/api/Rigidbody.h
index 3b0588f..8265ba5 100644
--- a/src/crepe/api/Rigidbody.h
+++ b/src/crepe/api/Rigidbody.h
@@ -1,5 +1,8 @@
 #pragma once
 
+#include <cmath>
+#include <set>
+
 #include "../Component.h"
 
 #include "types.h"
@@ -34,11 +37,11 @@ public:
 	 * the systems will not move the object.
 	 */
 	struct PhysicsConstraints {
-		//! X constraint
+		//! Prevent movement along X axis
 		bool x = false;
-		//! Y constraint
+		//! Prevent movement along Y axis
 		bool y = false;
-		//! rotation constraint
+		//! Prevent rotation
 		bool rotation = false;
 	};
 
@@ -50,29 +53,93 @@ public:
 	 */
 	struct Data {
 		//! objects mass
-		double mass = 0.0;
-		//! gravtiy scale
-		double gravity_scale = 0.0;
-		//! Changes if physics apply
+		float mass = 0.0;
+		/**
+		* \brief Gravity scale factor.
+		*
+		* The `gravity_scale` controls how much gravity affects the object. It is a multiplier applied to the default
+		* gravity force, allowing for fine-grained control over how the object responds to gravity.
+		* 
+		*/
+		float gravity_scale = 0;
+
+		//! Defines the type of the physics body, which determines how the physics system interacts with the object.
 		BodyType body_type = BodyType::DYNAMIC;
-		//! linear velocity of object
+
+		/**
+		* \name Linear (positional) motion
+		*
+		* These variables define the linear motion (movement along the position) of an object.
+		* The linear velocity is applied to the object's position in each update of the PhysicsSystem.
+		* The motion is affected by the object's linear velocity, its maximum velocity, and a coefficient
+		* that can scale the velocity over time.
+		*
+		* \{
+		*/
+		//! Linear velocity of the object (speed and direction).
 		vec2 linear_velocity;
-		//! maximum linear velocity of object
-		vec2 max_linear_velocity;
-		//! linear damping of object
-		vec2 linear_damping;
-		//! angular velocity of object
-		double angular_velocity = 0.0;
-		//! max angular velocity of object
-		double max_angular_velocity = 0.0;
-		//! angular damping of object
-		double angular_damping = 0.0;
-		//! movements constraints of object
+		//! Maximum linear velocity of the object. This limits the object's speed.
+		vec2 max_linear_velocity = {INFINITY, INFINITY};
+		//! Linear velocity coefficient. This scales the object's velocity for adjustment or damping.
+		vec2 linear_velocity_coefficient = {1, 1};
+		//! \}
+
+		/**
+		* \name Angular (rotational) motion
+		*
+		* These variables define the angular motion (rotation) of an object.
+		* The angular velocity determines how quickly the object rotates, while the maximum angular velocity
+		* sets a limit on the rotation speed. The angular velocity coefficient applies damping or scaling
+		* to the angular velocity, which can be used to simulate friction or other effects that slow down rotation.
+		*
+		* \{
+		*/
+		//! Angular velocity of the object, representing the rate of rotation (in degrees).
+		float angular_velocity = 0;
+		//! Maximum angular velocity of the object. This limits the maximum rate of rotation.
+		float max_angular_velocity = INFINITY;
+		//! Angular velocity coefficient. This scales the object's angular velocity, typically used for damping.
+		float angular_velocity_coefficient = 1;
+		//! \}
+
+		/**
+		* \brief Movement constraints for an object.
+		*
+		* The `PhysicsConstraints` struct defines the constraints that restrict an object's movement
+		* in certain directions or prevent rotation. These constraints effect only the physics system
+		* to prevent the object from moving or rotating in specified ways.
+		* 
+		*/
 		PhysicsConstraints constraints;
-		//! if gravity applies
-		bool use_gravity = true;
-		//! if object bounces
-		bool bounce = false;
+
+		/**
+		* \brief Elasticity factor of the material (bounce factor).
+		*
+		* The `elasticity_coefficient` controls how much of the object's velocity is retained after a collision.
+		* It represents the material's ability to bounce or recover velocity upon impact. The coefficient is a value
+		* above 0.0.
+		*
+		*/
+		float elastisity_coefficient = 0.0;
+
+		/**
+		* \brief Offset of all colliders relative to the object's transform position.
+		*
+		* The `offset` defines a positional shift applied to all colliders associated with the object, relative to the object's
+		* transform position. This allows for the colliders to be placed at a different position than the object's actual
+		* position, without modifying the object's transform itself.
+		* 
+		*/
+		vec2 offset;
+
+		/**
+		 * \brief Defines the collision layers of a GameObject.
+		 *
+		 * The `collision_layers` specifies the layers that the GameObject will collide with.
+		 * Each element represents a layer ID, and the GameObject will only detect 
+		 * collisions with other GameObjects that belong to these layers.
+		 */
+		std::set<int> collision_layers;
 	};
 
 public:
@@ -96,7 +163,16 @@ public:
 	 * 
 	 * \param force Vector2 that is added to the angular force.
 	 */
-	void add_force_angular(double force);
+	void add_force_angular(float force);
+
+protected:
+	/**
+	* Ensures there is at most one Rigidbody component per entity.
+	* \return Always returns 1, indicating this constraint.
+	*/
+	virtual int get_instances_max() const { return 1; }
+	//! ComponentManager instantiates all components
+	friend class ComponentManager;
 };
 
 } // namespace crepe
diff --git a/src/crepe/api/Script.h b/src/crepe/api/Script.h
index 1b339b0..d1be1dc 100644
--- a/src/crepe/api/Script.h
+++ b/src/crepe/api/Script.h
@@ -4,6 +4,7 @@
 
 #include "../manager/EventManager.h"
 #include "../manager/Mediator.h"
+#include "../system/CollisionSystem.h"
 #include "../types.h"
 #include "../util/OptionalRef.h"
 
diff --git a/src/crepe/system/CollisionSystem.cpp b/src/crepe/system/CollisionSystem.cpp
index c74ca1d..44a0431 100644
--- a/src/crepe/system/CollisionSystem.cpp
+++ b/src/crepe/system/CollisionSystem.cpp
@@ -1,5 +1,551 @@
+#include <algorithm>
+#include <cmath>
+#include <cstddef>
+#include <functional>
+#include <optional>
+#include <utility>
+#include <variant>
+
+#include "../manager/ComponentManager.h"
+#include "../manager/EventManager.h"
+#include "api/BoxCollider.h"
+#include "api/CircleCollider.h"
+#include "api/Event.h"
+#include "api/Metadata.h"
+#include "api/Rigidbody.h"
+#include "api/Transform.h"
+#include "api/Vector2.h"
+
+#include "Collider.h"
 #include "CollisionSystem.h"
+#include "types.h"
+#include "util/OptionalRef.h"
 
 using namespace crepe;
 
-void CollisionSystem::update() {}
+void CollisionSystem::update() {
+	std::vector<CollisionInternal> all_colliders;
+	game_object_id_t id = 0;
+	ComponentManager & mgr = this->mediator.component_manager;
+	RefVector<Rigidbody> rigidbodies = mgr.get_components_by_type<Rigidbody>();
+	// Collisions can only happen on object with a rigidbody
+	for (Rigidbody & rigidbody : rigidbodies) {
+		if (!rigidbody.active) continue;
+		id = rigidbody.game_object_id;
+		Transform & transform = mgr.get_components_by_id<Transform>(id).front().get();
+		// Check if the boxcollider is active and has the same id as the rigidbody.
+		RefVector<BoxCollider> boxcolliders = mgr.get_components_by_type<BoxCollider>();
+		for (BoxCollider & boxcollider : boxcolliders) {
+			if (boxcollider.game_object_id != id) continue;
+			if (!boxcollider.active) continue;
+			all_colliders.push_back({.id = id,
+									 .collider = collider_variant{boxcollider},
+									 .transform = transform,
+									 .rigidbody = rigidbody});
+		}
+		// Check if the circlecollider is active and has the same id as the rigidbody.
+		RefVector<CircleCollider> circlecolliders
+			= mgr.get_components_by_type<CircleCollider>();
+		for (CircleCollider & circlecollider : circlecolliders) {
+			if (circlecollider.game_object_id != id) continue;
+			if (!circlecollider.active) continue;
+			all_colliders.push_back({.id = id,
+									 .collider = collider_variant{circlecollider},
+									 .transform = transform,
+									 .rigidbody = rigidbody});
+		}
+	}
+
+	// Check between all colliders if there is a collision
+	std::vector<std::pair<CollisionInternal, CollisionInternal>> collided
+		= this->gather_collisions(all_colliders);
+
+	// For both objects call the collision handler
+	for (auto & collision_pair : collided) {
+		this->collision_handler_request(collision_pair.first, collision_pair.second);
+		this->collision_handler_request(collision_pair.second, collision_pair.first);
+	}
+}
+
+void CollisionSystem::collision_handler_request(CollisionInternal & this_data,
+												CollisionInternal & other_data) {
+
+	CollisionInternalType type
+		= this->get_collider_type(this_data.collider, other_data.collider);
+	std::pair<vec2, CollisionSystem::Direction> resolution_data
+		= this->collision_handler(this_data, other_data, type);
+	ComponentManager & mgr = this->mediator.component_manager;
+	OptionalRef<Metadata> this_metadata
+		= mgr.get_components_by_id<Metadata>(this_data.id).front().get();
+	OptionalRef<Metadata> other_metadata
+		= mgr.get_components_by_id<Metadata>(other_data.id).front().get();
+	OptionalRef<Collider> this_collider;
+	OptionalRef<Collider> other_collider;
+	switch (type) {
+		case CollisionInternalType::BOX_BOX: {
+			this_collider = std::get<std::reference_wrapper<BoxCollider>>(this_data.collider);
+			other_collider
+				= std::get<std::reference_wrapper<BoxCollider>>(other_data.collider);
+			break;
+		}
+		case CollisionInternalType::BOX_CIRCLE: {
+			this_collider = std::get<std::reference_wrapper<BoxCollider>>(this_data.collider);
+			other_collider
+				= std::get<std::reference_wrapper<CircleCollider>>(other_data.collider);
+			break;
+		}
+		case CollisionInternalType::CIRCLE_BOX: {
+			this_collider
+				= std::get<std::reference_wrapper<CircleCollider>>(this_data.collider);
+			other_collider
+				= std::get<std::reference_wrapper<BoxCollider>>(other_data.collider);
+			break;
+		}
+		case CollisionInternalType::CIRCLE_CIRCLE: {
+			this_collider
+				= std::get<std::reference_wrapper<CircleCollider>>(this_data.collider);
+			other_collider
+				= std::get<std::reference_wrapper<CircleCollider>>(other_data.collider);
+			break;
+		}
+	}
+
+	// collision info
+	crepe::CollisionSystem::CollisionInfo collision_info{
+		.this_collider = this_collider,
+		.this_transform = this_data.transform,
+		.this_rigidbody = this_data.rigidbody,
+		.this_metadata = this_metadata,
+		.other_collider = other_collider,
+		.other_transform = other_data.transform,
+		.other_rigidbody = other_data.rigidbody,
+		.other_metadata = other_metadata,
+		.resolution = resolution_data.first,
+		.resolution_direction = resolution_data.second,
+	};
+
+	// Determine if static needs to be called
+	this->determine_collision_handler(collision_info);
+}
+
+std::pair<vec2, CollisionSystem::Direction>
+CollisionSystem::collision_handler(CollisionInternal & data1, CollisionInternal & data2,
+								   CollisionInternalType type) {
+	vec2 resolution;
+	switch (type) {
+		case CollisionInternalType::BOX_BOX: {
+			const BoxCollider & collider1
+				= std::get<std::reference_wrapper<BoxCollider>>(data1.collider);
+			const BoxCollider & collider2
+				= std::get<std::reference_wrapper<BoxCollider>>(data2.collider);
+			vec2 collider_pos1 = this->get_current_position(collider1.offset, data1.transform,
+															data1.rigidbody);
+			vec2 collider_pos2 = this->get_current_position(collider2.offset, data2.transform,
+															data2.rigidbody);
+			resolution = this->get_box_box_resolution(collider1, collider2, collider_pos1,
+													  collider_pos2);
+			break;
+		}
+		case CollisionInternalType::BOX_CIRCLE: {
+			const BoxCollider & collider1
+				= std::get<std::reference_wrapper<BoxCollider>>(data1.collider);
+			const CircleCollider & collider2
+				= std::get<std::reference_wrapper<CircleCollider>>(data2.collider);
+			vec2 collider_pos1 = this->get_current_position(collider1.offset, data1.transform,
+															data1.rigidbody);
+			vec2 collider_pos2 = this->get_current_position(collider2.offset, data2.transform,
+															data2.rigidbody);
+			resolution = -this->get_circle_box_resolution(collider2, collider1, collider_pos2,
+														  collider_pos1);
+			break;
+		}
+		case CollisionInternalType::CIRCLE_CIRCLE: {
+			const CircleCollider & collider1
+				= std::get<std::reference_wrapper<CircleCollider>>(data1.collider);
+			const CircleCollider & collider2
+				= std::get<std::reference_wrapper<CircleCollider>>(data2.collider);
+			vec2 collider_pos1 = this->get_current_position(collider1.offset, data1.transform,
+															data1.rigidbody);
+			vec2 collider_pos2 = this->get_current_position(collider2.offset, data2.transform,
+															data2.rigidbody);
+			resolution = this->get_circle_circle_resolution(collider1, collider2,
+															collider_pos1, collider_pos2);
+			break;
+		}
+		case CollisionInternalType::CIRCLE_BOX: {
+			const CircleCollider & collider1
+				= std::get<std::reference_wrapper<CircleCollider>>(data1.collider);
+			const BoxCollider & collider2
+				= std::get<std::reference_wrapper<BoxCollider>>(data2.collider);
+			vec2 collider_pos1 = this->get_current_position(collider1.offset, data1.transform,
+															data1.rigidbody);
+			vec2 collider_pos2 = this->get_current_position(collider2.offset, data2.transform,
+															data2.rigidbody);
+			resolution = this->get_circle_box_resolution(collider1, collider2, collider_pos1,
+														 collider_pos2);
+			break;
+		}
+	}
+
+	Direction resolution_direction = Direction::NONE;
+	if (resolution.x != 0 && resolution.y != 0) {
+		resolution_direction = Direction::BOTH;
+	} else if (resolution.x != 0) {
+		resolution_direction = Direction::X_DIRECTION;
+		if (data1.rigidbody.data.linear_velocity.y != 0)
+			resolution.y = data1.rigidbody.data.linear_velocity.y
+						   * (resolution.x / data1.rigidbody.data.linear_velocity.x);
+	} else if (resolution.y != 0) {
+		resolution_direction = Direction::Y_DIRECTION;
+		if (data1.rigidbody.data.linear_velocity.x != 0)
+			resolution.x = data1.rigidbody.data.linear_velocity.x
+						   * (resolution.y / data1.rigidbody.data.linear_velocity.y);
+	}
+
+	return std::make_pair(resolution, resolution_direction);
+}
+
+vec2 CollisionSystem::get_box_box_resolution(const BoxCollider & box_collider1,
+											 const BoxCollider & box_collider2,
+											 const vec2 & final_position1,
+											 const vec2 & final_position2) const {
+	vec2 resolution; // Default resolution vector
+	vec2 delta = final_position2 - final_position1;
+
+	// Compute half-dimensions of the boxes
+	float half_width1 = box_collider1.dimensions.x / 2.0;
+	float half_height1 = box_collider1.dimensions.y / 2.0;
+	float half_width2 = box_collider2.dimensions.x / 2.0;
+	float half_height2 = box_collider2.dimensions.y / 2.0;
+
+	// Calculate overlaps along X and Y axes
+	float overlap_x = (half_width1 + half_width2) - std::abs(delta.x);
+	float overlap_y = (half_height1 + half_height2) - std::abs(delta.y);
+
+	// Check if there is a collision should always be true
+	if (overlap_x > 0 && overlap_y > 0) {
+		// Determine the direction of resolution
+		if (overlap_x < overlap_y) {
+			// Resolve along the X-axis (smallest overlap)
+			resolution.x = (delta.x > 0) ? -overlap_x : overlap_x;
+		} else if (overlap_y < overlap_x) {
+			// Resolve along the Y-axis (smallest overlap)
+			resolution.y = (delta.y > 0) ? -overlap_y : overlap_y;
+		} else {
+			// Equal overlap, resolve both directions with preference
+			resolution.x = (delta.x > 0) ? -overlap_x : overlap_x;
+			resolution.y = (delta.y > 0) ? -overlap_y : overlap_y;
+		}
+	}
+
+	return resolution;
+}
+
+vec2 CollisionSystem::get_circle_circle_resolution(const CircleCollider & circle_collider1,
+												   const CircleCollider & circle_collider2,
+												   const vec2 & final_position1,
+												   const vec2 & final_position2) const {
+	vec2 delta = final_position2 - final_position1;
+
+	// Compute the distance between the two circle centers
+	float distance = std::sqrt(delta.x * delta.x + delta.y * delta.y);
+
+	// Compute the combined radii of the two circles
+	float combined_radius = circle_collider1.radius + circle_collider2.radius;
+
+	// Compute the penetration depth
+	float penetration_depth = combined_radius - distance;
+
+	// Normalize the delta vector to get the collision direction
+	vec2 collision_normal = delta / distance;
+
+	// Compute the resolution vector
+	vec2 resolution = -collision_normal * penetration_depth;
+
+	return resolution;
+}
+
+vec2 CollisionSystem::get_circle_box_resolution(const CircleCollider & circle_collider,
+												const BoxCollider & box_collider,
+												const vec2 & circle_position,
+												const vec2 & box_position) const {
+	vec2 delta = circle_position - box_position;
+
+	// Compute half-dimensions of the box
+	float half_width = box_collider.dimensions.x / 2.0f;
+	float half_height = box_collider.dimensions.y / 2.0f;
+
+	// Clamp circle center to the nearest point on the box
+	vec2 closest_point;
+	closest_point.x = std::clamp(delta.x, -half_width, half_width);
+	closest_point.y = std::clamp(delta.y, -half_height, half_height);
+
+	// Find the vector from the circle center to the closest point
+	vec2 closest_delta = delta - closest_point;
+
+	// Normalize the delta to get the collision direction
+	float distance
+		= std::sqrt(closest_delta.x * closest_delta.x + closest_delta.y * closest_delta.y);
+	vec2 collision_normal = closest_delta / distance;
+
+	// Compute penetration depth
+	float penetration_depth = circle_collider.radius - distance;
+
+	// Compute the resolution vector
+	vec2 resolution = collision_normal * penetration_depth;
+
+	return resolution;
+}
+
+void CollisionSystem::determine_collision_handler(CollisionInfo & info) {
+	// Check rigidbody type for static
+	if (info.this_rigidbody.data.body_type == Rigidbody::BodyType::STATIC) return;
+	// If second body is static perform the static collision handler in this system
+	if (info.other_rigidbody.data.body_type == Rigidbody::BodyType::STATIC) {
+		this->static_collision_handler(info);
+	};
+	// Call collision event for user
+	CollisionEvent data(info);
+	EventManager & emgr = this->mediator.event_manager;
+	emgr.trigger_event<CollisionEvent>(data, info.this_collider.game_object_id);
+}
+
+void CollisionSystem::static_collision_handler(CollisionInfo & info) {
+	// Move object back using calculate move back value
+	info.this_transform.position += info.resolution;
+
+	// If bounce is enabled mirror velocity
+	if (info.this_rigidbody.data.elastisity_coefficient > 0) {
+		if (info.resolution_direction == Direction::BOTH) {
+			info.this_rigidbody.data.linear_velocity.y
+				= -info.this_rigidbody.data.linear_velocity.y
+				  * info.this_rigidbody.data.elastisity_coefficient;
+			info.this_rigidbody.data.linear_velocity.x
+				= -info.this_rigidbody.data.linear_velocity.x
+				  * info.this_rigidbody.data.elastisity_coefficient;
+		} else if (info.resolution_direction == Direction::Y_DIRECTION) {
+			info.this_rigidbody.data.linear_velocity.y
+				= -info.this_rigidbody.data.linear_velocity.y
+				  * info.this_rigidbody.data.elastisity_coefficient;
+		} else if (info.resolution_direction == Direction::X_DIRECTION) {
+			info.this_rigidbody.data.linear_velocity.x
+				= -info.this_rigidbody.data.linear_velocity.x
+				  * info.this_rigidbody.data.elastisity_coefficient;
+		}
+	}
+	// Stop movement if bounce is disabled
+	else {
+		info.this_rigidbody.data.linear_velocity = {0, 0};
+	}
+}
+
+std::vector<std::pair<CollisionSystem::CollisionInternal, CollisionSystem::CollisionInternal>>
+CollisionSystem::gather_collisions(std::vector<CollisionInternal> & colliders) {
+
+	// TODO:
+	// If no colliders skip
+	// Check if colliders has rigidbody if not skip
+
+	// TODO:
+	// If amount is higer than lets say 16 for now use quadtree otwerwise skip
+	// Quadtree code
+	// Quadtree is placed over the input vector
+
+	// Return data of collided colliders which are variants
+	std::vector<std::pair<CollisionInternal, CollisionInternal>> collisions_ret;
+	//using visit to visit the variant to access the active and id.
+	for (size_t i = 0; i < colliders.size(); ++i) {
+		for (size_t j = i + 1; j < colliders.size(); ++j) {
+			if (colliders[i].id == colliders[j].id) continue;
+			if (!have_common_layer(colliders[i].rigidbody.data.collision_layers,
+								   colliders[j].rigidbody.data.collision_layers))
+				continue;
+			CollisionInternalType type
+				= get_collider_type(colliders[i].collider, colliders[j].collider);
+			if (!get_collision(
+					{
+						.collider = colliders[i].collider,
+						.transform = colliders[i].transform,
+						.rigidbody = colliders[i].rigidbody,
+					},
+					{
+						.collider = colliders[j].collider,
+						.transform = colliders[j].transform,
+						.rigidbody = colliders[j].rigidbody,
+					},
+					type))
+				continue;
+			collisions_ret.emplace_back(colliders[i], colliders[j]);
+		}
+	}
+
+	return collisions_ret;
+}
+
+bool CollisionSystem::have_common_layer(const std::set<int> & layers1,
+										const std::set<int> & layers2) {
+
+	// Check if any number is equal in the layers
+	for (int num : layers1) {
+		if (layers2.contains(num)) {
+			// Common layer found
+			return true;
+			break;
+		}
+	}
+	// No common layer found
+	return false;
+}
+
+CollisionSystem::CollisionInternalType
+CollisionSystem::get_collider_type(const collider_variant & collider1,
+								   const collider_variant & collider2) const {
+	if (std::holds_alternative<std::reference_wrapper<CircleCollider>>(collider1)) {
+		if (std::holds_alternative<std::reference_wrapper<CircleCollider>>(collider2)) {
+			return CollisionInternalType::CIRCLE_CIRCLE;
+		} else {
+			return CollisionInternalType::CIRCLE_BOX;
+		}
+	} else {
+		if (std::holds_alternative<std::reference_wrapper<CircleCollider>>(collider2)) {
+			return CollisionInternalType::BOX_CIRCLE;
+		} else {
+			return CollisionInternalType::BOX_BOX;
+		}
+	}
+}
+
+bool CollisionSystem::get_collision(const CollisionInternal & first_info,
+									const CollisionInternal & second_info,
+									CollisionInternalType type) const {
+	switch (type) {
+		case CollisionInternalType::BOX_BOX: {
+			const BoxCollider & box_collider1
+				= std::get<std::reference_wrapper<BoxCollider>>(first_info.collider);
+			const BoxCollider & box_collider2
+				= std::get<std::reference_wrapper<BoxCollider>>(second_info.collider);
+			return this->get_box_box_collision(box_collider1, box_collider2,
+											   first_info.transform, second_info.transform,
+											   second_info.rigidbody, second_info.rigidbody);
+		}
+		case CollisionInternalType::BOX_CIRCLE: {
+			const BoxCollider & box_collider
+				= std::get<std::reference_wrapper<BoxCollider>>(first_info.collider);
+			const CircleCollider & circle_collider
+				= std::get<std::reference_wrapper<CircleCollider>>(second_info.collider);
+			return this->get_box_circle_collision(
+				box_collider, circle_collider, first_info.transform, second_info.transform,
+				second_info.rigidbody, second_info.rigidbody);
+		}
+		case CollisionInternalType::CIRCLE_CIRCLE: {
+			const CircleCollider & circle_collider1
+				= std::get<std::reference_wrapper<CircleCollider>>(first_info.collider);
+			const CircleCollider & circle_collider2
+				= std::get<std::reference_wrapper<CircleCollider>>(second_info.collider);
+			return this->get_circle_circle_collision(
+				circle_collider1, circle_collider2, first_info.transform,
+				second_info.transform, second_info.rigidbody, second_info.rigidbody);
+		}
+		case CollisionInternalType::CIRCLE_BOX: {
+			const CircleCollider & circle_collider
+				= std::get<std::reference_wrapper<CircleCollider>>(first_info.collider);
+			const BoxCollider & box_collider
+				= std::get<std::reference_wrapper<BoxCollider>>(second_info.collider);
+			return this->get_box_circle_collision(
+				box_collider, circle_collider, first_info.transform, second_info.transform,
+				second_info.rigidbody, second_info.rigidbody);
+		}
+	}
+	return false;
+}
+
+bool CollisionSystem::get_box_box_collision(const BoxCollider & box1, const BoxCollider & box2,
+											const Transform & transform1,
+											const Transform & transform2,
+											const Rigidbody & rigidbody1,
+											const Rigidbody & rigidbody2) const {
+	// Get current positions of colliders
+	vec2 final_position1 = this->get_current_position(box1.offset, transform1, rigidbody1);
+	vec2 final_position2 = this->get_current_position(box2.offset, transform2, rigidbody2);
+
+	// Calculate half-extents (half width and half height)
+	float half_width1 = box1.dimensions.x / 2.0;
+	float half_height1 = box1.dimensions.y / 2.0;
+	float half_width2 = box2.dimensions.x / 2.0;
+	float half_height2 = box2.dimensions.y / 2.0;
+
+	// Check if the boxes overlap along the X and Y axes
+	return (final_position1.x + half_width1 > final_position2.x - half_width2
+			&& final_position1.x - half_width1 < final_position2.x + half_width2
+			&& final_position1.y + half_height1 > final_position2.y - half_height2
+			&& final_position1.y - half_height1 < final_position2.y + half_height2);
+}
+
+bool CollisionSystem::get_box_circle_collision(const BoxCollider & box1,
+											   const CircleCollider & circle2,
+											   const Transform & transform1,
+											   const Transform & transform2,
+											   const Rigidbody & rigidbody1,
+											   const Rigidbody & rigidbody2) const {
+	// Get current positions of colliders
+	vec2 final_position1 = this->get_current_position(box1.offset, transform1, rigidbody1);
+	vec2 final_position2 = this->get_current_position(circle2.offset, transform2, rigidbody2);
+
+	// Calculate box half-extents
+	float half_width = box1.dimensions.x / 2.0;
+	float half_height = box1.dimensions.y / 2.0;
+
+	// Find the closest point on the box to the circle's center
+	float closest_x = std::max(final_position1.x - half_width,
+							   std::min(final_position2.x, final_position1.x + half_width));
+	float closest_y = std::max(final_position1.y - half_height,
+							   std::min(final_position2.y, final_position1.y + half_height));
+
+	// Calculate the distance squared between the circle's center and the closest point on the box
+	float distance_x = final_position2.x - closest_x;
+	float distance_y = final_position2.y - closest_y;
+	float distance_squared = distance_x * distance_x + distance_y * distance_y;
+
+	// Compare distance squared with the square of the circle's radius
+	return distance_squared < circle2.radius * circle2.radius;
+}
+
+bool CollisionSystem::get_circle_circle_collision(const CircleCollider & circle1,
+												  const CircleCollider & circle2,
+												  const Transform & transform1,
+												  const Transform & transform2,
+												  const Rigidbody & rigidbody1,
+												  const Rigidbody & rigidbody2) const {
+	// Get current positions of colliders
+	vec2 final_position1 = this->get_current_position(circle1.offset, transform1, rigidbody1);
+	vec2 final_position2 = this->get_current_position(circle2.offset, transform2, rigidbody2);
+
+	float distance_x = final_position1.x - final_position2.x;
+	float distance_y = final_position1.y - final_position2.y;
+	float distance_squared = distance_x * distance_x + distance_y * distance_y;
+
+	// Calculate the sum of the radii
+	float radius_sum = circle1.radius + circle2.radius;
+
+	// Check if the distance between the centers is less than or equal to the sum of the radii
+	return distance_squared < radius_sum * radius_sum;
+}
+
+vec2 CollisionSystem::get_current_position(const vec2 & collider_offset,
+										   const Transform & transform,
+										   const Rigidbody & rigidbody) const {
+	// Get the rotation in radians
+	float radians1 = transform.rotation * (M_PI / 180.0);
+
+	// Calculate total offset with scale
+	vec2 total_offset = (rigidbody.data.offset + collider_offset) * transform.scale;
+
+	// Rotate
+	float rotated_total_offset_x1
+		= total_offset.x * cos(radians1) - total_offset.y * sin(radians1);
+	float rotated_total_offset_y1
+		= total_offset.x * sin(radians1) + total_offset.y * cos(radians1);
+
+	// Final positions considering scaling and rotation
+	return (transform.position + vec2(rotated_total_offset_x1, rotated_total_offset_y1));
+}
diff --git a/src/crepe/system/CollisionSystem.h b/src/crepe/system/CollisionSystem.h
index c1a70d8..7e893c8 100644
--- a/src/crepe/system/CollisionSystem.h
+++ b/src/crepe/system/CollisionSystem.h
@@ -1,13 +1,312 @@
 #pragma once
 
+#include <optional>
+#include <variant>
+#include <vector>
+
+#include "api/BoxCollider.h"
+#include "api/CircleCollider.h"
+#include "api/Event.h"
+#include "api/Metadata.h"
+#include "api/Rigidbody.h"
+#include "api/Transform.h"
+#include "api/Vector2.h"
+
+#include "Collider.h"
 #include "System.h"
 
 namespace crepe {
 
+//! A system responsible for detecting and handling collisions between colliders.
 class CollisionSystem : public System {
 public:
 	using System::System;
+
+private:
+	//! A variant type that can hold either a BoxCollider or a CircleCollider.
+	using collider_variant = std::variant<std::reference_wrapper<BoxCollider>,
+										  std::reference_wrapper<CircleCollider>>;
+
+	//! Enum representing the types of collider pairs for collision detection.
+	enum class CollisionInternalType {
+		BOX_BOX,
+		CIRCLE_CIRCLE,
+		BOX_CIRCLE,
+		CIRCLE_BOX,
+	};
+
+	/**
+		* \brief A structure to store the collision data of a single collider.
+		* 
+		* This structure all components and id that are for needed within this system when calculating or handeling collisions.
+		* The transform and rigidbody are mostly needed for location and rotation.
+		* In rigidbody additional info is written about what the body of the object is,
+		* and how it should respond on a collision.
+		*/
+	struct CollisionInternal {
+		game_object_id_t id = 0;
+		collider_variant collider;
+		Transform & transform;
+		Rigidbody & rigidbody;
+	};
+
+	//! Enum representing movement directions during collision resolution.
+	enum class Direction {
+		//! No movement required.
+		NONE,
+		//! Movement in the X direction.
+		X_DIRECTION,
+		//! Movement in the Y direction.
+		Y_DIRECTION,
+		//! Movement in both X and Y directions.
+		BOTH
+	};
+
+public:
+	/**
+		* \brief Structure representing detailed collision information between two colliders.
+		* 
+		* Includes information about the colliding objects and the resolution data for handling the collision.
+		*/
+	struct CollisionInfo {
+		Collider & this_collider;
+		Transform & this_transform;
+		Rigidbody & this_rigidbody;
+		Metadata & this_metadata;
+		Collider & other_collider;
+		Transform & other_transform;
+		Rigidbody & other_rigidbody;
+		Metadata & other_metadata;
+		//! The resolution vector for the collision.
+		vec2 resolution;
+		//! The direction of movement for resolving the collision.
+		Direction resolution_direction = Direction::NONE;
+	};
+
+public:
+	//! Updates the collision system by checking for collisions between colliders and handling them.
 	void update() override;
+
+private:
+	/**
+		* \brief Determines the type of collider pair from two colliders.
+		* 
+		* Uses std::holds_alternative to identify the types of the provided colliders.
+		* 
+		* \param collider1 First collider variant (BoxCollider or CircleCollider).
+		* \param collider2 Second collider variant (BoxCollider or CircleCollider).
+		* \return The combined type of the two colliders.
+		*/
+	CollisionInternalType get_collider_type(const collider_variant & collider1,
+											const collider_variant & collider2) const;
+
+	/**
+		* \brief Calculates the current position of a collider.
+		* 
+		* Combines the Collider offset, Transform position, and Rigidbody offset to compute the position of the collider.
+		* 
+		* \param collider_offset The offset of the collider.
+		* \param transform The Transform of the associated game object.
+		* \param rigidbody The Rigidbody of the associated game object.
+		* \return The calculated position of the collider.
+		*/
+	vec2 get_current_position(const vec2 & collider_offset, const Transform & transform,
+							  const Rigidbody & rigidbody) const;
+
+private:
+	/**
+		* \brief Handles collision resolution between two colliders.
+		* 
+		* Processes collision data and adjusts objects to resolve collisions and/or calls the user oncollision script function.
+		* 
+		* \param data1 Collision data for the first collider.
+		* \param data2 Collision data for the second collider.
+		*/
+	void collision_handler_request(CollisionInternal & data1, CollisionInternal & data2);
+
+	/**
+		* \brief Resolves collision between two colliders and calculates the movement required.
+		* 
+		* Determines the displacement and direction needed to separate colliders based on their types.
+		* 
+		* \param data1 Collision data for the first collider.
+		* \param data2 Collision data for the second collider.
+		* \param type The type of collider pair.
+		* \return A pair containing the resolution vector and direction for the first collider.
+		*/
+	std::pair<vec2, Direction> collision_handler(CollisionInternal & data1,
+												 CollisionInternal & data2,
+												 CollisionInternalType type);
+
+	/**
+		* \brief Calculates the resolution vector for two BoxColliders.
+		* 
+		* Computes the displacement required to separate two overlapping BoxColliders.
+		* 
+		* \param box_collider1 The first BoxCollider.
+		* \param box_collider2 The second BoxCollider.
+		* \param position1 The position of the first BoxCollider.
+		* \param position2 The position of the second BoxCollider.
+		* \return The resolution vector for the collision.
+		*/
+	vec2 get_box_box_resolution(const BoxCollider & box_collider1,
+								const BoxCollider & box_collider2, const vec2 & position1,
+								const vec2 & position2) const;
+
+	/**
+		* \brief Calculates the resolution vector for two CircleCollider.
+		* 
+		* Computes the displacement required to separate two overlapping CircleCollider.
+		* 
+		* \param circle_collider1 The first CircleCollider.
+		* \param circle_collider2 The second CircleCollider.
+		* \param position1 The position of the first CircleCollider.
+		* \param position2 The position of the second CircleCollider.
+		* \return The resolution vector for the collision.
+		*/
+	vec2 get_circle_circle_resolution(const CircleCollider & circle_collider1,
+									  const CircleCollider & circle_collider2,
+									  const vec2 & final_position1,
+									  const vec2 & final_position2) const;
+
+	/**
+		* \brief Calculates the resolution vector for two CircleCollider.
+		* 
+		* Computes the displacement required to separate two overlapping CircleCollider.
+		* 
+		* \param circle_collider The first CircleCollider.
+		* \param box_collider The second CircleCollider.
+		* \param circle_position The position of the CircleCollider.
+		* \param box_position The position of the BoxCollider.
+		* \param inverse Inverted true if box circle collision, false if circle box collision (inverts the direction).
+		* \return The resolution vector for the collision.
+		*/
+	vec2 get_circle_box_resolution(const CircleCollider & circle_collider,
+								   const BoxCollider & box_collider,
+								   const vec2 & circle_position,
+								   const vec2 & box_position) const;
+
+	/**
+		* \brief Determines the appropriate collision handler for a collision.
+		* 
+		* Decides the correct resolution process based on the dynamic or static nature of the colliders involved.
+		* 
+		* \param info Collision information containing data about both colliders.
+		*/
+	void determine_collision_handler(CollisionInfo & info);
+
+	/**
+		* \brief Handles collisions involving static objects.
+		* 
+		* Resolves collisions by adjusting positions and modifying velocities if bounce is enabled.
+		* 
+		* \param info Collision information containing data about both colliders.
+		*/
+	void static_collision_handler(CollisionInfo & info);
+
+private:
+	/**
+		* \brief Checks for collisions between colliders.
+		* 
+		* Identifies collisions and generates pairs of colliding objects for further processing.
+		* 
+		* \param colliders A collection of all active colliders.
+		* \return A list of collision pairs with their associated data.
+		*/
+	std::vector<std::pair<CollisionInternal, CollisionInternal>>
+	gather_collisions(std::vector<CollisionInternal> & colliders);
+
+	/**
+	 * \brief Checks if two collision layers have at least one common layer.
+	 * 
+	 * This function checks if there is any overlapping layer between the two inputs.
+	 * It compares each layer from the first input to see 
+	 * if it exists in the second input. If at least one common layer is found, 
+	 * the function returns true, indicating that the two colliders share a common 
+	 * collision layer.
+	 * 
+	 * \param layers1 all collision layers for the first collider.
+	 * \param layers2 all collision layers for the second collider.
+	 * \return Returns true if there is at least one common layer, false otherwise.
+	 */
+
+	bool have_common_layer(const std::set<int> & layers1, const std::set<int> & layers2);
+
+	/**
+		* \brief Checks for collision between two colliders.
+		* 
+		* Calls the appropriate collision detection function based on the collider types.
+		* 
+		* \param first_info Collision data for the first collider.
+		* \param second_info Collision data for the second collider.
+		* \param type The type of collider pair.
+		* \return True if a collision is detected, otherwise false.
+		*/
+	bool get_collision(const CollisionInternal & first_info,
+					   const CollisionInternal & second_info,
+					   CollisionInternalType type) const;
+
+	/**
+		* \brief Detects collisions between two BoxColliders.
+		* 
+		* \param box1 The first BoxCollider.
+		* \param box2 The second BoxCollider.
+		* \param transform1 Transform of the first object.
+		* \param transform2 Transform of the second object.
+		* \param rigidbody1 Rigidbody of the first object.
+		* \param rigidbody2 Rigidbody of the second object.
+		* \return True if a collision is detected, otherwise false.
+		*/
+	bool get_box_box_collision(const BoxCollider & box1, const BoxCollider & box2,
+							   const Transform & transform1, const Transform & transform2,
+							   const Rigidbody & rigidbody1,
+							   const Rigidbody & rigidbody2) const;
+
+	/**
+	 * \brief Check collision for box on circle collider
+	 *
+	 * \param box1 The BoxCollider
+	 * \param circle2 The CircleCollider
+	 * \param transform1 Transform of the first object.
+	 * \param transform2 Transform of the second object.
+	 * \param rigidbody1 Rigidbody of the first object.
+	 * \param rigidbody2 Rigidbody of the second object.
+	 * \return True if a collision is detected, otherwise false.
+	 */
+	bool get_box_circle_collision(const BoxCollider & box1, const CircleCollider & circle2,
+								  const Transform & transform1, const Transform & transform2,
+								  const Rigidbody & rigidbody1,
+								  const Rigidbody & rigidbody2) const;
+
+	/**
+	 * \brief Check collision for circle on circle collider
+	 *
+	 * \param circle1 First CircleCollider
+	 * \param circle2 Second CircleCollider
+	 * \param transform1 Transform of the first object.
+	 * \param transform2 Transform of the second object.
+	 * \param rigidbody1 Rigidbody of the first object.
+	 * \param rigidbody2 Rigidbody of the second object.
+	 * \return True if a collision is detected, otherwise false.
+	 *
+	 * \return status of collision
+	 */
+	bool get_circle_circle_collision(const CircleCollider & circle1,
+									 const CircleCollider & circle2,
+									 const Transform & transform1,
+									 const Transform & transform2,
+									 const Rigidbody & rigidbody1,
+									 const Rigidbody & rigidbody2) const;
+};
+
+/**
+ * \brief Event triggered during a collision between objects.
+ */
+class CollisionEvent : public Event {
+public:
+	crepe::CollisionSystem::CollisionInfo info;
+	CollisionEvent(const crepe::CollisionSystem::CollisionInfo & collisionInfo)
+		: info(collisionInfo) {}
 };
 
 } // namespace crepe
diff --git a/src/crepe/system/PhysicsSystem.cpp b/src/crepe/system/PhysicsSystem.cpp
index bebcf3d..ebf4439 100644
--- a/src/crepe/system/PhysicsSystem.cpp
+++ b/src/crepe/system/PhysicsSystem.cpp
@@ -25,17 +25,20 @@ void PhysicsSystem::update() {
 					if (transform.game_object_id == rigidbody.game_object_id) {
 
 						// Add gravity
-						if (rigidbody.data.use_gravity) {
+						if (rigidbody.data.gravity_scale > 0) {
 							rigidbody.data.linear_velocity.y
 								+= (rigidbody.data.mass * rigidbody.data.gravity_scale
 									* gravity);
 						}
 						// Add damping
-						if (rigidbody.data.angular_damping != 0) {
-							rigidbody.data.angular_velocity *= rigidbody.data.angular_damping;
+						if (rigidbody.data.angular_velocity_coefficient > 0) {
+							rigidbody.data.angular_velocity
+								*= rigidbody.data.angular_velocity_coefficient;
 						}
-						if (rigidbody.data.linear_damping != vec2{0, 0}) {
-							rigidbody.data.linear_velocity *= rigidbody.data.linear_damping;
+						if (rigidbody.data.linear_velocity_coefficient.x > 0
+							&& rigidbody.data.linear_velocity_coefficient.y > 0) {
+							rigidbody.data.linear_velocity
+								*= rigidbody.data.linear_velocity_coefficient;
 						}
 
 						// Max velocity check