Collision 2/2

Src/IAESandbox/imp/cpp/Game.cpp

@@ -2,9 +2,9 @@
 
 #include <IAEngine/Input.hpp>
 #include <IAEngine/Rendering/Camera.hpp>
-#include <IAEngine/Components/PhysicsBody2D.hpp>
+#include <IAEngine/Rendering/DebugDraw.hpp>
-#include <IAEngine/Components/BoxCollider2D.hpp>
 #include <IAEngine/Components/SpriteRenderer.hpp>
+#include <IAEngine/Components/Physics.hpp>
 
 #include <IACore/File.hpp>
 
@@ -13,7 +13,7 @@ namespace ia::iae::game
     RefPtr<Scene> scene;
 
     RefPtr<Node> g_player;
-    PhysicsBody2DComponent* g_playerPhysicsBody{};
+    PhysicsComponent* g_playerPhysics;
 
     VOID Game::Initialize()
     {
@@ -34,20 +34,18 @@ namespace ia::iae::game
             });
             t->BakeAnimations();
         }
-        {
+        g_playerPhysics = g_player->AddComponent<PhysicsComponent>();
-            g_playerPhysicsBody = g_player->AddComponent<PhysicsBody2DComponent>();
+        g_playerPhysics->AddCollider({
-            g_playerPhysicsBody->IsDynamic() = true;
+            .IsTrigger = false,
-            const auto collider = g_player->AddComponent<BoxCollider2DComponent>();
+            .Position = {
-            collider->Rect() = {
+                0.0f, 0.0f,
-                0, 
+            },
-                0,
+            .Size = {
-                g_player->DrawnSize().x,
+                25.0f, 25.0f
-                g_player->DrawnSize().y,
+            }
-            };
+        });
-            collider->IsDebugDrawEnabled() = true;
-        }
         g_player->Tags() = NODE_TAG_PLAYER;
-        g_player->SetLocalPosition({200, 200});
+        g_player->SetLocalPosition({200, 300});
 
         const auto obstacle = MakeRefPtr<Node>();
         {
@@ -56,23 +54,23 @@ namespace ia::iae::game
                 .ShouldLoop = true,
                 .Keys = {
                     SpriteRendererComponent::AnimationKeyFrame {
-                        .Scale = {3.0f, 0.5f},
+                        .Scale = {1.0f, 0.5f},
                         .ColorOverlay = {0.75f, 0.0f, 0.0f, 1.0f}
                     }
                 },
             });
             t->BakeAnimations();
         }
-        {
+        const auto obstaclePhysics = obstacle->AddComponent<PhysicsComponent>();
-            obstacle->AddComponent<PhysicsBody2DComponent>();
+        obstaclePhysics->AddCollider({
-            const auto collider = obstacle->AddComponent<BoxCollider2DComponent>();
+            .IsTrigger = false,
-            collider->Rect() = {
+            .Position = {
-                0, 0,
+                0.0f, 0.0f,
-                obstacle->DrawnSize().x,
+            },
-                obstacle->DrawnSize().y
+            .Size = {
-            };
+                100.0f, 50.0f
-            collider->IsDebugDrawEnabled() = true;
+            }
-        }
+        });
         obstacle->Tags() = NODE_TAG_GROUND;
         obstacle->SetLocalSortIndex(20);
         obstacle->SetLocalPosition({200, 400});
@@ -89,8 +87,7 @@ namespace ia::iae::game
 
     VOID Game::Update()
     {
-        if(Input::WasKeyPressed(Input::KEY_SPACE))
+        const auto d = Input::GetDirectionalInput();
-            g_playerPhysicsBody->Jump(200.0f);   
+        g_playerPhysics->Move(d);
-        g_playerPhysicsBody->SetVelocityX(Input::GetDirectionalInput().x * 100.0f);
     }
 }

Src/IAEngine/CMakeLists.txt

@@ -13,9 +13,11 @@ set(IAEngine_Sources
     imp/cpp/Rendering/Renderer.cpp
     imp/cpp/Rendering/GPUBuffer.cpp
     imp/cpp/Rendering/GPUTexture.cpp
+    imp/cpp/Rendering/DebugDraw.cpp
 
     imp/cpp/Rendering/Pipeline/Pipeline.cpp
     imp/cpp/Rendering/Pipeline/UnlitMesh.cpp
+    imp/cpp/Rendering/Pipeline/PostProcess.cpp
 
     imp/cpp/Physics/Physics.cpp
 
@@ -25,12 +27,11 @@ set(IAEngine_Sources
     imp/cpp/Nodes/Node.cpp
 
     imp/cpp/Components/AtlasRenderer.cpp
-    imp/cpp/Components/BoxCollider2D.cpp
     imp/cpp/Components/SpriteRenderer.cpp
     imp/cpp/Components/SoundEmitter.cpp
     imp/cpp/Components/ParticleEmitter.cpp
-    imp/cpp/Components/PhysicsBody2D.cpp
     imp/cpp/Components/TextureRenderer.cpp
+    imp/cpp/Components/Physics.cpp
 )
 
 add_library(IAEngine STATIC ${IAEngine_Sources})
@@ -39,4 +40,4 @@ target_include_directories(IAEngine PUBLIC inc/)
 target_include_directories(IAEngine PRIVATE imp/hpp)
 
 target_link_libraries(IAEngine PUBLIC IACore ImGui glm::glm)
-target_link_libraries(IAEngine PRIVATE SDL3::SDL3 SDL3_mixer::SDL3_mixer box2d RmlUi::RmlUi)
+target_link_libraries(IAEngine PRIVATE SDL3::SDL3 SDL3_mixer::SDL3_mixer RmlUi::RmlUi)

Src/IAEngine/imp/cpp/Components/BoxCollider2D.cpp

@@ -1,62 +0,0 @@
-// IAEngine: 2D Game Engine by IA
-// Copyright (C) 2025 IAS (ias@iasoft.dev)
-//
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-#include <IAEngine/Components/BoxCollider2D.hpp>
-#include <IAEngine/Components/PhysicsBody2D.hpp>
-#include <IAEngine/Components/TextureRenderer.hpp>
-#include <IAEngine/Rendering/Renderer.hpp>
-#include <IAEngine/Physics/Physics.hpp>
-#include <IAEngine/Nodes/Node.hpp>
-
-namespace ia::iae
-{
-    EXTERN Texture g_whiteStrokeTexture;
-
-    BoxCollider2DComponent::BoxCollider2DComponent(IN Node *node) : IComponent(node)
-    {
-        IA_RELEASE_ASSERT(m_body = node->GetComponent<PhysicsBody2DComponent>());
-        m_physicsHandle = Physics::AddColliderToBody(m_body->PhysicsHandle(), this);
-    }
-
-    VOID BoxCollider2DComponent::Draw()
-    {
-        if (!m_isDebugDrawEnabled)
-            return;
-        Renderer::Draw(Renderer::GetMesh_Quad(), g_whiteStrokeTexture.GetHandle(), m_node->GetPosition() + glm::vec2{m_rect.x, m_rect.y},
-                       glm::vec2{m_rect.z, m_rect.w}, 0, Renderer::MAX_LAYER_INDEX,
-                       0, {1.0f, 1.0f, 1.0f, 1.0f});
-    }
-
-    VOID BoxCollider2DComponent::Update()
-    {
-    }
-
-    VOID BoxCollider2DComponent::OnCollisionEnter(IN Node *other)
-    {
-        if (other->HasTag(NODE_TAG_GROUND))
-            m_body->IsGrounded() = true;
-        if(m_collisionEnterCallback)
-            m_collisionEnterCallback(other);
-    }
-
-    VOID BoxCollider2DComponent::OnCollisionExit(IN Node *other)
-    {
-        if (other->HasTag(NODE_TAG_GROUND))
-            m_body->IsGrounded() = false;
-        if(m_collisionExitCallback)
-            m_collisionExitCallback(other);
-    }
-} // namespace ia::iae

Src/IAEngine/imp/cpp/Components/Physics.cpp

@@ -0,0 +1,75 @@
+// IAEngine: 2D Game Engine by IA
+// Copyright (C) 2025 IAS (ias@iasoft.dev)
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#include <IAEngine/Components/Physics.hpp>
+#include <IAEngine/Physics/Physics.hpp>
+#include <IAEngine/Nodes/Node.hpp>
+
+namespace ia::iae
+{
+    PhysicsComponent::PhysicsComponent(IN Node *node) : IComponent(node)
+    {
+        m_physicsHandle = Physics::RegisterComponent(this);
+    }
+
+    PhysicsComponent::~PhysicsComponent()
+    {
+    }
+
+    VOID PhysicsComponent::Draw()
+    {
+    }
+
+    VOID PhysicsComponent::Update()
+    {
+    }
+
+    Handle PhysicsComponent::CreateCollider()
+    {
+        m_colliders.pushBack({});
+        return m_colliders.size() - 1;
+    }
+
+    Handle PhysicsComponent::AddCollider(IN Collider collider)
+    {
+        m_colliders.pushBack(collider);
+        return m_colliders.size() - 1;
+    }
+
+    PhysicsComponent::Collider &PhysicsComponent::GetCollider(IN Handle handle)
+    {
+        return m_colliders[handle];
+    }
+
+    VOID PhysicsComponent::Move(IN glm::vec2 direction)
+    {
+        const auto v = direction * m_movementSpeed;
+        for(const auto& t: m_colliders)
+        {
+            if(!Physics::CanMove(m_physicsHandle, t, v))
+                return;
+        }
+        m_node->SetLocalPosition(m_node->GetLocalPosition() + v);
+    }
+
+    VOID PhysicsComponent::Jump(IN FLOAT32 force)
+    {
+    }
+
+    VOID PhysicsComponent::OnCollision(IN PhysicsComponent *other)
+    {
+    }
+} // namespace ia::iae

Src/IAEngine/imp/cpp/Components/PhysicsBody2D.cpp

@@ -1,66 +0,0 @@
-// IAEngine: 2D Game Engine by IA
-// Copyright (C) 2025 IAS (ias@iasoft.dev)
-//
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-#include <IAEngine/Components/BoxCollider2D.hpp>
-#include <IAEngine/Components/PhysicsBody2D.hpp>
-#include <IAEngine/Nodes/Node.hpp>
-#include <IAEngine/Physics/Physics.hpp>
-
-namespace ia::iae
-{
-    PhysicsBody2DComponent::PhysicsBody2DComponent(IN Node *node) : IComponent(node)
-    {
-        m_physicsHandle = Physics::AddBody(this);
-    }
-
-    VOID PhysicsBody2DComponent::Draw()
-    {
-    }
-
-    VOID PhysicsBody2DComponent::Update()
-    {
-        if (m_isDynamic)
-            m_node->SetLocalPosition(Physics::GetBodyPosition(m_physicsHandle));
-        if (!m_isRotationLocked)
-            m_node->SetLocalRotation(Physics::GetBodyRotation(m_physicsHandle));
-    }
-
-    VOID PhysicsBody2DComponent::SetVelocity(IN glm::vec2 v)
-    {
-        Physics::SetBodyVelocity(m_physicsHandle, v);
-    }
-
-    VOID PhysicsBody2DComponent::SetVelocityX(IN FLOAT32 v)
-    {
-        Physics::SetBodyVelocityX(m_physicsHandle, v);
-    }
-
-    VOID PhysicsBody2DComponent::SetVelocityY(IN FLOAT32 v)
-    {
-        Physics::SetBodyVelocityY(m_physicsHandle, v);
-    }
-
-    VOID PhysicsBody2DComponent::ApplyForce(IN glm::vec2 force)
-    {
-        Physics::ApplyBodyForce(m_physicsHandle, force);
-    }
-
-    VOID PhysicsBody2DComponent::Jump(IN FLOAT32 velocity)
-    {
-        if(m_isGrounded)
-            Physics::SetBodyVelocityY(m_physicsHandle, -velocity);
-    }
-} // namespace ia::iae

Src/IAEngine/imp/cpp/IAEngine.cpp

@@ -132,11 +132,12 @@ namespace ia::iae
 
     VOID Engine::UpdateGame()
     {
+        Physics::Update();
+
         if B_LIKELY (g_activeScene)
             g_activeScene->Update();
 
         UI::Update();
-        Physics::Update();
     }
 
     VOID Engine::RenderGame()

Src/IAEngine/imp/cpp/Physics/Physics.cpp

@@ -19,171 +19,118 @@
 
 #include <IAEngine/Nodes/Node.hpp>
 
-#include <box2d/box2d.h>
-
 #include <map>
 
 namespace ia::iae
 {
-    struct Body
+    Vector<PhysicsComponent *> g_physicsComponents;
-    {
-        struct Collider
-        {
-            b2ShapeId ShapeId{};
-            BoxCollider2DComponent *ColliderComponent{};
-        };
 
-        b2BodyId BodyId{.world0 = 0xFFFF};
+    FLOAT32 Sq(IN FLOAT32 v)
-        PhysicsBody2DComponent *BodyComponent;
+    {
-        Vector<Collider> Colliders;
+        return v * v;
+    }
+
+    enum class RectSide
+    {
+        NONE,
+        LEFT,
+        RIGHT,
+        TOP,
+        BOTTOM,
     };
 
-    b2WorldId g_worldId{};
+    RectSide GetRectSide(IN glm::vec2 d)
-    Vector<Body> g_bodies;
-    std::map<Handle, BoxCollider2DComponent*> g_shapeColliders;
-
-    INLINE Handle ShapeIdToHandle(IN b2ShapeId id)
     {
-        return *reinterpret_cast<Handle*>(&id.index1);
+        const auto dX = abs(d.x);
+        const auto dY = abs(d.y);
+        if (d.x >= 0)
+        {
+            if (dX >= dY)
+            {
+                return RectSide::RIGHT;
+            }
+            else
+            {
+                return (d.y < 0) ? RectSide::TOP : RectSide::BOTTOM;
+            }
+        }
+        else
+        {
+            if (dX >= dY)
+            {
+                return RectSide::LEFT;
+            }
+            else
+            {
+                return (d.y < 0) ? RectSide::TOP : RectSide::BOTTOM;
+            }
+        }
+        return RectSide::NONE;
     }
 
     VOID Physics::Initialize()
     {
-        auto worldDef = b2DefaultWorldDef();
-        worldDef.gravity = b2Vec2{0.0f, 1000.0f};
-        g_worldId = b2CreateWorld(&worldDef);
     }
 
     VOID Physics::Terminate()
     {
-        b2DestroyWorld(g_worldId);
     }
 
     VOID Physics::Update()
     {
-        CONSTEXPR FLOAT32 TIME_STEP = 1.0f / 60.0f;
-        CONSTEXPR INT32 SUB_STEP_COUNT = 4;
-        b2World_Step(g_worldId, TIME_STEP, SUB_STEP_COUNT);
-
-        // Process contact events
-        const auto contactEvents = b2World_GetContactEvents(g_worldId);
-        for(INT32 i = 0; i < contactEvents.beginCount; i++)
-        {
-            const auto& shapeA = g_shapeColliders[ShapeIdToHandle(contactEvents.beginEvents[i].shapeIdA)];
-            const auto& shapeB = g_shapeColliders[ShapeIdToHandle(contactEvents.beginEvents[i].shapeIdB)];
-            shapeA->OnCollisionEnter(shapeB->GetNode());
-            shapeB->OnCollisionEnter(shapeA->GetNode());
-        }
-        for(INT32 i = 0; i < contactEvents.endCount; i++)
-        {
-            const auto& shapeA = g_shapeColliders[ShapeIdToHandle(contactEvents.endEvents[i].shapeIdA)];
-            const auto& shapeB = g_shapeColliders[ShapeIdToHandle(contactEvents.endEvents[i].shapeIdB)];
-            shapeA->OnCollisionExit(shapeB->GetNode());
-            shapeB->OnCollisionExit(shapeA->GetNode());
-        }
-
-        // Process sensor events
-        const auto sensorEvents = b2World_GetSensorEvents(g_worldId);
-        for(INT32 i = 0; i < sensorEvents.beginCount; i++)
-        {
-            const auto& shapeA = g_shapeColliders[ShapeIdToHandle(sensorEvents.beginEvents[i].sensorShapeId)];
-            const auto& shapeB = g_shapeColliders[ShapeIdToHandle(sensorEvents.beginEvents[i].visitorShapeId)];
-            shapeA->OnCollisionEnter(shapeB->GetNode());
-            shapeB->OnCollisionEnter(shapeA->GetNode());
-        }
-        for(INT32 i = 0; i < sensorEvents.endCount; i++)
-        {
-            const auto& shapeA = g_shapeColliders[ShapeIdToHandle(sensorEvents.endEvents[i].sensorShapeId)];
-            const auto& shapeB = g_shapeColliders[ShapeIdToHandle(sensorEvents.endEvents[i].visitorShapeId)];
-            shapeA->OnCollisionExit(shapeB->GetNode());
-            shapeB->OnCollisionExit(shapeA->GetNode());
-        }
     }
 
-    VOID Physics::Bake()
+    Handle Physics::RegisterComponent(IN PhysicsComponent *component)
     {
-        for (auto &b : g_bodies)
+        g_physicsComponents.pushBack(component);
+        return g_physicsComponents.size() - 1;
+    }
+
+    BOOL Physics::CanMove(IN Handle handle, IN CONST PhysicsComponent::Collider &collider, IN glm::vec2 movement)
+    {
+        const auto comp = g_physicsComponents[handle];
+        const auto middle = comp->GetNode()->GetPosition() + movement + collider.Position + collider.Size / 2.0f;
+        const auto halfSize = collider.Size / 2.0f;
+        for (const auto &t : g_physicsComponents)
         {
-            const auto drawnSize = b.BodyComponent->GetNode()->DrawnSize();
+            if (t == comp)
-            const auto pos = b.BodyComponent->GetNode()->GetPosition();
+                continue;
-
+            for (const auto &tc : t->Colliders())
-            auto bodyDef = b2DefaultBodyDef();
-            if (b.BodyComponent->IsDynamic())
-                bodyDef.type = b2_dynamicBody;
-            bodyDef.position = b2Vec2{pos.x + drawnSize.x/2.0f, pos.y + drawnSize.y/2.0f};
-            if (b.BodyId.world0 != 0xFFFF)
-                b2DestroyBody(b.BodyId);
-            b.BodyId = b2CreateBody(g_worldId, &bodyDef);
-
-            for (auto &c : b.Colliders)
             {
-                const auto rect = c.ColliderComponent->Rect();
+                BOOL isColliding = false;
-                const auto halfW = rect.z/2.0f;
+                const auto tMiddle = t->GetNode()->GetPosition() + tc.Position + tc.Size / 2.0f;
-                const auto halfH = rect.w/2.0f;
+                const auto tHalfSize = tc.Size / 2.0f;
-                const auto box = b2MakeOffsetBox(halfW, halfH, {rect.x, rect.y}, b2MakeRot(0));
+                const auto rectSide = GetRectSide(tMiddle - middle);
-                auto boxShapeDef = b2DefaultShapeDef();
+                const auto distance = Sq(tMiddle.x - middle.x) + Sq(tMiddle.y - middle.y);
-                boxShapeDef.density = 1.0f;
+                switch (rectSide)
-                boxShapeDef.isSensor = c.ColliderComponent->IsTrigger();
+                {
-                boxShapeDef.enableContactEvents = c.ColliderComponent->CollisionsEnabled();
+                case RectSide::LEFT:
-                boxShapeDef.enableSensorEvents = boxShapeDef.enableContactEvents;
+                case RectSide::RIGHT:
-                c.ShapeId = b2CreatePolygonShape(b.BodyId, &boxShapeDef, &box);
+                    isColliding = (Sq(tHalfSize.x + halfSize.x) >= distance);
-                g_shapeColliders[ShapeIdToHandle(c.ShapeId)] = c.ColliderComponent;
+                    break;
+
+                case RectSide::TOP:
+                case RectSide::BOTTOM:
+                    isColliding = (Sq(tHalfSize.y + halfSize.y) >= distance);
+                    break;
+
+                default:
+                    isColliding = false;
+                    break;
+                }
+                if (isColliding)
+                {
+                    // Collision callback
+                    comp->OnCollision(t);
+                    t->OnCollision(comp);
+
+                    // Overlap block
+                    if (tc.IsTrigger)
+                        continue;
+                    return false;
+                }
             }
         }
-    }
+        return true;
-
-    Handle Physics::AddBody(IN PhysicsBody2DComponent *body)
-    {
-        g_bodies.pushBack(Body{
-            .BodyComponent = body,
-        });
-        return g_bodies.size() - 1;
-    }
-
-    Handle Physics::AddColliderToBody(IN Handle bodyHandle, IN BoxCollider2DComponent *collider)
-    {
-        auto &b = g_bodies[bodyHandle];
-        b.Colliders.pushBack(Body::Collider{
-            .ColliderComponent = collider,
-        });
-        return b.Colliders.size() - 1;
-    }
-
-    FLOAT32 Physics::GetBodyRotation(IN Handle handle)
-    {
-        const auto &b = g_bodies[handle];
-        return acosf(b2Body_GetRotation(b.BodyId).c);
-    }
-
-    glm::vec2 Physics::GetBodyPosition(IN Handle handle)
-    {
-        const auto &b = g_bodies[handle];
-        const auto drawnSize = b.BodyComponent->GetNode()->DrawnSize();
-        const auto v = b2Body_GetPosition(b.BodyId);
-        return {v.x - drawnSize.x/2.0f, v.y - drawnSize.y/2.0f};
-    }
-
-    VOID Physics::ApplyBodyForce(IN Handle handle, IN glm::vec2 force)
-    {
-        const auto &b = g_bodies[handle];
-        b2Body_ApplyForce(b.BodyId, {force.x, force.y}, b2Body_GetLocalCenterOfMass(b.BodyId), true);
-    }
-
-    VOID Physics::SetBodyVelocity(IN Handle handle, IN glm::vec2 v)
-    {
-        const auto &b = g_bodies[handle];
-        b2Body_SetLinearVelocity(b.BodyId, {v.x, v.y});
-    }
-
-    VOID Physics::SetBodyVelocityX(IN Handle handle, IN FLOAT32 v)
-    {
-        const auto &b = g_bodies[handle];
-        b2Body_SetLinearVelocity(b.BodyId, {v, b2Body_GetLinearVelocity(b.BodyId).y});
-    }
-
-    VOID Physics::SetBodyVelocityY(IN Handle handle, IN FLOAT32 v)
-    {
-        const auto &b = g_bodies[handle];
-        b2Body_SetLinearVelocity(b.BodyId, {b2Body_GetLinearVelocity(b.BodyId).x, v});
     }
 } // namespace ia::iae

Src/IAEngine/imp/cpp/Rendering/DebugDraw.cpp

@@ -0,0 +1,189 @@
+// IAEngine: 2D Game Engine by IA
+// Copyright (C) 2025 IAS (ias@iasoft.dev)
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#include <IAEngine/IAEngine.hpp>
+#include <IAEngine/Rendering/Camera.hpp>
+#include <IAEngine/Rendering/DebugDraw.hpp>
+#include <IAEngine/Rendering/GPUBuffer.hpp>
+#include <IAEngine/Rendering/GPUTexture.hpp>
+#include <IAEngine/Rendering/Pipeline/UnlitMesh.hpp>
+#include <IAEngine/Rendering/Renderer.hpp>
+
+#include <SDL3/SDL_gpu.h>
+
+#include <backends/imgui_impl_sdl3.h>
+#include <backends/imgui_impl_sdlgpu3.h>
+
+namespace ia::iae
+{
+    EXTERN SDL_Window *g_windowHandle;
+    EXTERN SDL_GPUDevice *g_gpuDevice;
+
+    ImGuiIO g_imGUIIO{};
+
+    struct ShapeLine
+    {
+        ImVec2 To{};
+        ImVec2 From{};
+        ImColor Color{};
+        FLOAT32 Thickness{1.0f};
+        BOOL Visibility{true};
+    };
+
+    struct ShapeRect
+    {
+        ImVec2 TopLeft{};
+        ImVec2 BottomRight{};
+        ImColor Color{};
+        BOOL Visibility{true};
+    };
+
+    struct UIWindow
+    {
+        PCCHAR Title{""};
+        glm::vec2 Position{};
+        glm::vec2 Size{};
+        std::function<VOID()> ContentDrawCallback{};
+        BOOL Visibility{true};
+    };
+
+    Vector<UIWindow> g_debugUIWindows;
+    Vector<ShapeLine> g_lineShapes;
+    Vector<ShapeRect> g_rectShapes;
+
+    VOID DebugDraw::Initailize()
+    {
+        const auto mainScale = SDL_GetDisplayContentScale(SDL_GetPrimaryDisplay());
+
+        IMGUI_CHECKVERSION();
+        ImGui::CreateContext();
+        g_imGUIIO = ImGui::GetIO();
+        g_imGUIIO.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;
+        g_imGUIIO.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;
+
+        ImGui::StyleColorsClassic();
+
+        ImGuiStyle &style = ImGui::GetStyle();
+        style.ScaleAllSizes(mainScale);
+        style.FontScaleDpi = mainScale;
+
+        ImGui_ImplSDLGPU3_InitInfo initInfo{.Device = g_gpuDevice,
+                                            .ColorTargetFormat =
+                                                SDL_GetGPUSwapchainTextureFormat(g_gpuDevice, g_windowHandle),
+                                            .PresentMode = SDL_GPU_PRESENTMODE_VSYNC};
+        ImGui_ImplSDL3_InitForSDLGPU(g_windowHandle);
+        ImGui_ImplSDLGPU3_Init(&initInfo);
+    }
+
+    VOID DebugDraw::Terminate()
+    {
+        ImGui_ImplSDL3_Shutdown();
+        ImGui_ImplSDLGPU3_Shutdown();
+        ImGui::DestroyContext();
+    }
+
+    VOID DebugDraw::Draw()
+    {
+        for (const auto &w : g_debugUIWindows)
+        {
+            if (!w.Visibility)
+                continue;
+            ImGui::Begin(w.Title);
+            ImGui::SetWindowPos({w.Position.x, w.Position.y});
+            ImGui::SetWindowSize({w.Size.x, w.Size.y});
+            w.ContentDrawCallback();
+            ImGui::End();
+        }
+        const auto drawList = ImGui::GetForegroundDrawList();
+        for (const auto &t : g_lineShapes)
+        {
+            if (!t.Visibility)
+                continue;
+            drawList->AddLine(t.From, t.To, t.Color, t.Thickness);
+        }
+        for (const auto &t : g_rectShapes)
+        {
+            if (!t.Visibility)
+                continue;
+            drawList->AddRectFilled(t.TopLeft, t.BottomRight, t.Color);
+        }
+    }
+
+    Handle DebugDraw::AddLine(IN CONST glm::vec2 &from, IN CONST glm::vec2 &to, IN CONST glm::vec4 &color,
+                              IN FLOAT32 thickness)
+    {
+        g_lineShapes.pushBack(ShapeLine{.To = ImVec2{to.x, to.y},
+                                        .From = ImVec2{from.x, from.y},
+                                        .Color = IM_COL32(color.x * 255, color.y * 255, color.z * 255, color.w * 255),
+                                        .Thickness = thickness});
+        return g_lineShapes.size() - 1;
+    }
+
+    Handle DebugDraw::AddRect(IN CONST glm::vec2 &position, IN CONST glm::vec2 &size, IN CONST glm::vec4 &color)
+    {
+        g_rectShapes.pushBack({
+            .TopLeft =
+                ImVec2{
+                    position.x,
+                    position.y,
+                },
+            .BottomRight =
+                ImVec2{
+                    position.x + size.x,
+                    position.y + size.y,
+                },
+            .Color = IM_COL32(color.x * 255, color.y * 255, color.z * 255, color.w * 255),
+        });
+        return g_rectShapes.size() - 1;
+    }
+
+    Handle DebugDraw::AddUIWindow(IN PCCHAR title, IN CONST glm::vec2 &position, IN CONST glm::vec2 &size,
+                                  IN std::function<VOID()> contentDrawCallback)
+    {
+        g_debugUIWindows.pushBack(UIWindow{title, position, size, contentDrawCallback});
+        return g_debugUIWindows.size() - 1;
+    }
+
+    VOID DebugDraw::SetLineVisibility(IN Handle handle, IN BOOL visible)
+    {
+        g_lineShapes[handle].Visibility = visible;
+    }
+
+    VOID DebugDraw::SetRectVisibility(IN Handle handle, IN BOOL visible)
+    {
+        g_rectShapes[handle].Visibility = visible;
+    }
+
+    VOID DebugDraw::SetUIWindowVisibility(IN Handle handle, IN BOOL visible)
+    {
+        g_debugUIWindows[handle].Visibility = visible;
+    }
+
+    VOID DebugDraw::ToggleLineVisibility(IN Handle handle)
+    {
+        g_lineShapes[handle].Visibility = !g_lineShapes[handle].Visibility;
+    }
+
+    VOID DebugDraw::ToggleRectVisibility(IN Handle handle)
+    {
+        g_rectShapes[handle].Visibility = !g_rectShapes[handle].Visibility;
+    }
+
+    VOID DebugDraw::ToggleUIWindowVisibility(IN Handle handle)
+    {
+        g_debugUIWindows[handle].Visibility = !g_debugUIWindows[handle].Visibility;
+    }
+} // namespace ia::iae

Src/IAEngine/imp/cpp/Rendering/Pipeline/PostProcess.cpp

@@ -0,0 +1,81 @@
+// IAEngine: 2D Game Engine by IA
+// Copyright (C) 2025 IAS (ias@iasoft.dev)
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#include <IAEngine/Rendering/Pipeline/PostProcess.hpp>
+
+#include <SDL3/SDL_gpu.h>
+
+#include <EmbeddedShaders.hpp>
+
+namespace ia::iae
+{
+    EXTERN SDL_GPUDevice *g_gpuDevice;
+    EXTERN SDL_Window *g_windowHandle;
+
+    Pipeline_PostProcess::~Pipeline_PostProcess()
+    {
+        if (m_handle)
+            SDL_ReleaseGPUGraphicsPipeline(g_gpuDevice, (SDL_GPUGraphicsPipeline *) m_handle);
+    }
+
+    RefPtr<Pipeline_PostProcess> Pipeline_PostProcess::Create()
+    {
+        const auto res = MakeRefPtr<Pipeline_PostProcess>();
+
+        const auto vertexShader = LoadShaderFromMemory(ShaderStage::VERTEX, SHADER_SOURCE_POSTPROCESS_VERT,
+                                                       sizeof(SHADER_SOURCE_POSTPROCESS_VERT), 0, 0, 0, 0);
+        const auto pixelShader = LoadShaderFromMemory(ShaderStage::PIXEL, SHADER_SOURCE_POSTPROCESS_FRAG,
+                                                      sizeof(SHADER_SOURCE_POSTPROCESS_FRAG), 2, 0, 0, 0);
+
+        SDL_GPUColorTargetDescription colorTargets[] = {{
+            .format = SDL_GetGPUSwapchainTextureFormat(g_gpuDevice, g_windowHandle),
+        }};
+        SDL_GPUGraphicsPipelineCreateInfo createInfo = {
+            .vertex_shader = (SDL_GPUShader *) vertexShader,
+            .fragment_shader = (SDL_GPUShader *) pixelShader,
+            .vertex_input_state = SDL_GPUVertexInputState{.vertex_buffer_descriptions = nullptr,
+                                                          .num_vertex_buffers = 0,
+                                                          .vertex_attributes = nullptr,
+                                                          .num_vertex_attributes = 0},
+            .primitive_type = SDL_GPU_PRIMITIVETYPE_TRIANGLELIST,
+            .rasterizer_state = SDL_GPURasterizerState{.fill_mode = SDL_GPU_FILLMODE_FILL,
+                                                       .cull_mode = SDL_GPU_CULLMODE_NONE,
+                                                       .front_face = SDL_GPU_FRONTFACE_COUNTER_CLOCKWISE},
+            .target_info = {.color_target_descriptions = colorTargets,
+                            .num_color_targets = sizeof(colorTargets) / sizeof(colorTargets[0]),
+                            .has_depth_stencil_target = false},
+        };
+
+        SDL_GPUGraphicsPipeline *handle{};
+        if (!(handle = SDL_CreateGPUGraphicsPipeline(g_gpuDevice, &createInfo)))
+        {
+            IAE_LOG_ERROR("Failed to create a SDL graphics pipeline: ", SDL_GetError());
+            return nullptr;
+        }
+
+        UnloadShader(pixelShader);
+        UnloadShader(vertexShader);
+
+        res->m_handle = (Handle) handle;
+
+        return res;
+    }
+
+    VOID Pipeline_PostProcess::Bind(IN Handle renderPassHandle)
+    {
+        SDL_BindGPUGraphicsPipeline((SDL_GPURenderPass *) renderPassHandle, (SDL_GPUGraphicsPipeline *) m_handle);
+    }
+} // namespace ia::iae

Src/IAEngine/imp/cpp/Rendering/Renderer.cpp

@@ -16,8 +16,10 @@
 
 #include <IAEngine/IAEngine.hpp>
 #include <IAEngine/Rendering/Camera.hpp>
+#include <IAEngine/Rendering/DebugDraw.hpp>
 #include <IAEngine/Rendering/GPUBuffer.hpp>
 #include <IAEngine/Rendering/GPUTexture.hpp>
+#include <IAEngine/Rendering/Pipeline/PostProcess.hpp>
 #include <IAEngine/Rendering/Pipeline/UnlitMesh.hpp>
 #include <IAEngine/Rendering/Renderer.hpp>
 
@@ -45,7 +47,7 @@ namespace ia::iae
         SDL_Rect Scissor{0, 0, 0, 0};
     };
 
-    Vector<Mesh*> g_meshes{};
+    Vector<Mesh *> g_meshes{};
     RenderState g_renderState{};
 } // namespace ia::iae
 
@@ -55,21 +57,21 @@ namespace ia::iae
 
     INT32 Renderer::s_width{};
     INT32 Renderer::s_height{};
-    Vector<Renderer::DebugUIWindow> Renderer::s_debugUIWindows;
 
     SDL_GPUDevice *g_gpuDevice{};
 
+    ImDrawData *g_imDrawData{};
+
     // Render State
     SDL_GPUCommandBuffer *g_cmdBuffer{};
     SDL_GPURenderPass *g_renderPass{};
     SDL_GPUTexture *g_swpChainTexture{};
     SDL_GPUTexture *g_depthBufferTexture{};
-
+    SDL_GPUTexture *g_sceneDrawBufferTexture{};
-    // ImGUI State
+    SDL_GPUTexture *g_debugDrawBufferTexture{};
-    ImGuiIO g_imGUIIO{};
-    ImDrawData *g_imDrawData{};
 
     RefPtr<Pipeline_UnlitMesh> g_pipelineUnlitMesh;
+    RefPtr<Pipeline_PostProcess> g_pipelinePostProcess;
 
     Camera2D g_camera{};
 
@@ -86,6 +88,9 @@ namespace ia::iae
     Texture g_whiteFillTexture{};
     Texture g_whiteStrokeTexture{};
 
+    SDL_GPUColorTargetInfo colorTargetInfo = {0};
+    SDL_GPUDepthStencilTargetInfo depthStencilTargetInfo = {0};
+
     BOOL Renderer::Initialize()
     {
         SDL_GetWindowSizeInPixels(g_windowHandle, &s_width, &s_height);
@@ -104,30 +109,24 @@ namespace ia::iae
         SDL_SetGPUSwapchainParameters(g_gpuDevice, g_windowHandle, SDL_GPU_SWAPCHAINCOMPOSITION_SDR,
                                       SDL_GPU_PRESENTMODE_VSYNC);
 
-        const auto mainScale = SDL_GetDisplayContentScale(SDL_GetPrimaryDisplay());
+        DebugDraw::Initailize();
-
-        IMGUI_CHECKVERSION();
-        ImGui::CreateContext();
-        g_imGUIIO = ImGui::GetIO();
-        g_imGUIIO.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;
-        g_imGUIIO.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;
-
-        ImGui::StyleColorsClassic();
-
-        ImGuiStyle &style = ImGui::GetStyle();
-        style.ScaleAllSizes(mainScale);
-        style.FontScaleDpi = mainScale;
-
-        ImGui_ImplSDLGPU3_InitInfo initInfo{.Device = g_gpuDevice,
-                                            .ColorTargetFormat =
-                                                SDL_GetGPUSwapchainTextureFormat(g_gpuDevice, g_windowHandle),
-                                            .PresentMode = SDL_GPU_PRESENTMODE_VSYNC};
-        ImGui_ImplSDL3_InitForSDLGPU(g_windowHandle);
-        ImGui_ImplSDLGPU3_Init(&initInfo);
 
         if (!GPUBuffer::InitializeStagingBuffer())
             return false;
 
+        {
+            SDL_GPUTextureCreateInfo createInfo{.type = SDL_GPU_TEXTURETYPE_2D,
+                                                .format = SDL_GetGPUSwapchainTextureFormat(g_gpuDevice, g_windowHandle),
+                                                .usage =
+                                                    SDL_GPU_TEXTUREUSAGE_COLOR_TARGET | SDL_GPU_TEXTUREUSAGE_SAMPLER,
+                                                .width = (UINT32) s_width,
+                                                .height = (UINT32) s_height,
+                                                .layer_count_or_depth = 1,
+                                                .num_levels = 1,
+                                                .sample_count = SDL_GPU_SAMPLECOUNT_1};
+            g_sceneDrawBufferTexture = SDL_CreateGPUTexture(g_gpuDevice, &createInfo);
+            g_debugDrawBufferTexture = SDL_CreateGPUTexture(g_gpuDevice, &createInfo);
+        }
         {
             SDL_GPUTextureCreateInfo createInfo{.type = SDL_GPU_TEXTURETYPE_2D,
                                                 .format = SDL_GPU_TEXTUREFORMAT_D16_UNORM,
@@ -143,6 +142,7 @@ namespace ia::iae
         GPUTexture::Initialize();
 
         g_pipelineUnlitMesh = Pipeline_UnlitMesh::Create();
+        g_pipelinePostProcess = Pipeline_PostProcess::Create();
 
         matProjection = glm::orthoLH(0.0f, (FLOAT32) s_width, (FLOAT32) s_height, 0.0f, -2097152.0f, 2097152.0f);
 
@@ -182,6 +182,18 @@ namespace ia::iae
             },
             {0, 1, 2, 2, 3, 0});
 
+        colorTargetInfo.clear_color = SDL_FColor{0.33f, 0.33f, 0.33f, 1.0f};
+        colorTargetInfo.load_op = SDL_GPU_LOADOP_CLEAR;
+        colorTargetInfo.store_op = SDL_GPU_STOREOP_STORE;
+
+        depthStencilTargetInfo.cycle = true;
+        depthStencilTargetInfo.clear_depth = 0;
+        depthStencilTargetInfo.clear_stencil = 0;
+        depthStencilTargetInfo.load_op = SDL_GPU_LOADOP_CLEAR;
+        depthStencilTargetInfo.store_op = SDL_GPU_STOREOP_STORE;
+        depthStencilTargetInfo.stencil_load_op = SDL_GPU_LOADOP_CLEAR;
+        depthStencilTargetInfo.stencil_store_op = SDL_GPU_STOREOP_STORE;
+
         return true;
     }
 
@@ -197,77 +209,32 @@ namespace ia::iae
         }
 
         g_pipelineUnlitMesh.reset();
+        g_pipelinePostProcess.reset();
 
         GPUTexture::Terminate();
 
         GPUBuffer::TerminateStagingBuffer();
 
         SDL_ReleaseGPUTexture(g_gpuDevice, g_depthBufferTexture);
+        SDL_ReleaseGPUTexture(g_gpuDevice, g_sceneDrawBufferTexture);
+        SDL_ReleaseGPUTexture(g_gpuDevice, g_debugDrawBufferTexture);
 
-        ImGui_ImplSDL3_Shutdown();
+        DebugDraw::Terminate();
-        ImGui_ImplSDLGPU3_Shutdown();
-        ImGui::DestroyContext();
 
         SDL_ReleaseWindowFromGPUDevice(g_gpuDevice, g_windowHandle);
         SDL_DestroyGPUDevice(g_gpuDevice);
     }
 
-    VOID Renderer::AddDebugUIWindow(IN PCCHAR title, IN CONST glm::vec2 &position, IN CONST glm::vec2 &size,
-                                    IN std::function<VOID()> contentDrawCallback)
-    {
-        s_debugUIWindows.pushBack(DebugUIWindow{title, position, size, contentDrawCallback});
-    }
-
     VOID Renderer::BeginFrame()
     {
-        ImGui_ImplSDLGPU3_NewFrame();
-        ImGui_ImplSDL3_NewFrame();
-        ImGui::NewFrame();
-        for (const auto &w : s_debugUIWindows)
-        {
-            ImGui::Begin(w.Title);
-            ImGui::SetWindowPos({w.Position.x, w.Position.y});
-            ImGui::SetWindowSize({w.Size.x, w.Size.y});
-            w.ContentDrawCallback();
-            ImGui::End();
-        }
-        ImGui::Render();
-
         if (!(g_cmdBuffer = SDL_AcquireGPUCommandBuffer(g_gpuDevice)))
         {
             IAE_LOG_ERROR("Couldn't acquire SDL3 GPU command buffer: ", SDL_GetError());
             return;
         }
 
-        if (!SDL_WaitAndAcquireGPUSwapchainTexture(g_cmdBuffer, g_windowHandle, &g_swpChainTexture, (PUINT32) &s_width,
+        colorTargetInfo.texture = g_sceneDrawBufferTexture;
-                                                   (PUINT32) &s_height))
-        {
-            IAE_LOG_ERROR("Couldn't acquire SDL3 GPU Swapchain texture: ", SDL_GetError());
-            return;
-        }
-
-        if (!g_swpChainTexture)
-            return;
-
-        g_imDrawData = ImGui::GetDrawData();
-
-        ImGui_ImplSDLGPU3_PrepareDrawData(g_imDrawData, g_cmdBuffer);
-
-        SDL_GPUColorTargetInfo colorTargetInfo = {0};
-        colorTargetInfo.texture = g_swpChainTexture;
-        colorTargetInfo.clear_color = SDL_FColor{0.33f, 0.33f, 0.33f, 1.0f};
-        colorTargetInfo.load_op = SDL_GPU_LOADOP_CLEAR;
-        colorTargetInfo.store_op = SDL_GPU_STOREOP_STORE;
-
-        SDL_GPUDepthStencilTargetInfo depthStencilTargetInfo = {0};
         depthStencilTargetInfo.texture = g_depthBufferTexture;
-        depthStencilTargetInfo.cycle = true;
-        depthStencilTargetInfo.clear_depth = 0;
-        depthStencilTargetInfo.clear_stencil = 0;
-        depthStencilTargetInfo.load_op = SDL_GPU_LOADOP_CLEAR;
-        depthStencilTargetInfo.store_op = SDL_GPU_STOREOP_STORE;
-        depthStencilTargetInfo.stencil_load_op = SDL_GPU_LOADOP_CLEAR;
-        depthStencilTargetInfo.stencil_store_op = SDL_GPU_STOREOP_STORE;
 
         g_renderPass = SDL_BeginGPURenderPass(g_cmdBuffer, &colorTargetInfo, 1, &depthStencilTargetInfo);
 
@@ -279,11 +246,48 @@ namespace ia::iae
 
     VOID Renderer::EndFrame()
     {
+        SDL_EndGPURenderPass(g_renderPass);
+
+        ImGui_ImplSDLGPU3_NewFrame();
+        ImGui_ImplSDL3_NewFrame();
+        ImGui::NewFrame();
+        DebugDraw::Draw();
+        ImGui::Render();
+        g_imDrawData = ImGui::GetDrawData();
+        ImGui_ImplSDLGPU3_PrepareDrawData(g_imDrawData, g_cmdBuffer);
+        colorTargetInfo.texture = g_debugDrawBufferTexture;
+        g_renderPass = SDL_BeginGPURenderPass(g_cmdBuffer, &colorTargetInfo, 1, nullptr);
+        ImGui_ImplSDLGPU3_RenderDrawData(g_imDrawData, g_cmdBuffer, g_renderPass);
+        SDL_EndGPURenderPass(g_renderPass);
+
+        if (!SDL_WaitAndAcquireGPUSwapchainTexture(g_cmdBuffer, g_windowHandle, &g_swpChainTexture, (PUINT32) &s_width,
+                                                   (PUINT32) &s_height))
+        {
+            IAE_LOG_ERROR("Couldn't acquire SDL3 GPU Swapchain texture: ", SDL_GetError());
+            return;
+        }
+
         if (!g_swpChainTexture)
             return;
 
-        ImGui_ImplSDLGPU3_RenderDrawData(g_imDrawData, g_cmdBuffer, g_renderPass);
+        colorTargetInfo.texture = g_swpChainTexture;
+
+        g_renderPass = SDL_BeginGPURenderPass(g_cmdBuffer, &colorTargetInfo, 1, nullptr);
+        g_pipelinePostProcess->Bind((Handle) g_renderPass);
+        SDL_GPUTextureSamplerBinding textureBindings[2] = {
+            {
+                .texture = g_sceneDrawBufferTexture,
+                .sampler = (SDL_GPUSampler*)GPUTexture::GetDefaultSampler()
+            },
+            {
+                .texture = g_debugDrawBufferTexture,
+                .sampler = (SDL_GPUSampler*)GPUTexture::GetDefaultSampler()
+            },
+        };
+        SDL_BindGPUFragmentSamplers(g_renderPass, 0, textureBindings, 2);
+        SDL_DrawGPUPrimitives(g_renderPass, 6, 1, 0, 0);
         SDL_EndGPURenderPass(g_renderPass);
+
         SDL_SubmitGPUCommandBuffer(g_cmdBuffer);
     }
 
@@ -336,7 +340,7 @@ namespace ia::iae
     Handle Renderer::CreateMesh(IN CONST Vector<MeshVertex> &vertices, IN CONST Vector<INT32> &indices)
     {
         const auto mesh = CreateUnmanagedMesh(vertices, indices);
-        g_meshes.pushBack((Mesh*)mesh);
+        g_meshes.pushBack((Mesh *) mesh);
         return mesh;
     }
 
@@ -344,16 +348,16 @@ namespace ia::iae
     {
         const auto mesh = new Mesh();
         mesh->VertexBuffer = GPUBuffer::Create(GPUBuffer::Usage::VERTEX, vertices.data(),
-                                              static_cast<UINT32>(vertices.size() * sizeof(vertices[0])));
+                                               static_cast<UINT32>(vertices.size() * sizeof(vertices[0])));
         mesh->IndexBuffer = GPUBuffer::Create(GPUBuffer::Usage::INDEX, indices.data(),
-                                             static_cast<UINT32>(indices.size() * sizeof(indices[0])));
+                                              static_cast<UINT32>(indices.size() * sizeof(indices[0])));
         mesh->IndexCount = static_cast<UINT32>(indices.size());
-        return (Handle)mesh;
+        return (Handle) mesh;
     }
 
     VOID Renderer::DestroyUnmanagedMesh(IN Handle handle)
     {
-        delete ((Mesh*)handle);
+        delete ((Mesh *) handle);
     }
 
     VOID Renderer::Draw(IN Handle meshHandle, IN Handle textureHandle, IN CONST glm::vec2 &position,
@@ -402,7 +406,7 @@ namespace ia::iae
         else
             SDL_SetGPUScissor(g_renderPass, &g_defaultScissor);
 
-        const auto mesh = (Mesh*)meshHandle;
+        const auto mesh = (Mesh *) meshHandle;
         SDL_GPUBufferBinding bufferBindings[] = {
             {.buffer = (SDL_GPUBuffer *) mesh->VertexBuffer->GetHandle(), .offset = 0},
             {.buffer = (SDL_GPUBuffer *) mesh->IndexBuffer->GetHandle(), .offset = 0}};

Src/IAEngine/imp/cpp/Scene.cpp

@@ -27,7 +27,6 @@ namespace ia::iae
 
     VOID Scene::OnActivate()
     {
-        Physics::Bake();
     }
 
     VOID Scene::OnDeactivate()

Src/IAEngine/imp/glsl/PostProcessing/PostProcess.frag

@@ -0,0 +1,23 @@
+#version 450
+#extension GL_ARB_separate_shader_objects : enable
+
+layout(location = 0) in vec2 inTexCoord;
+
+layout(set = 2, binding = 0) uniform sampler2D sceneDrawTexture;
+layout(set = 2, binding = 1) uniform sampler2D debugDrawTexture;
+
+layout(location = 0) out vec4 outColor;
+
+vec4 overlay(vec4 background, vec4 foreground) {
+    return mix(
+        2.0 * background * foreground,
+        1.0 - 2.0 * (1.0 - background) * (1.0 - foreground),
+        step(0.5, background)
+    );
+}
+
+void main()
+{
+    vec2 uv = vec2(inTexCoord.x, 1.0 - inTexCoord.y);
+    outColor = overlay(texture(debugDrawTexture, uv), texture(sceneDrawTexture, uv));
+}

Src/IAEngine/imp/glsl/PostProcessing/PostProcess.vert

@@ -0,0 +1,10 @@
+#version 450
+#extension GL_ARB_separate_shader_objects : enable
+
+layout(location = 0) out vec2 outTexCoord;
+
+void main()
+{
+    outTexCoord = vec2((gl_VertexIndex << 1) & 2, gl_VertexIndex & 2);
+	gl_Position = vec4(outTexCoord * 2.0f - 1.0f, 0.0f, 1.0f);
+}

Src/IAEngine/inc/IAEngine/Components/BoxCollider2D.hpp

@@ -1,85 +0,0 @@
-// IAEngine: 2D Game Engine by IA
-// Copyright (C) 2025 IAS (ias@iasoft.dev)
-//
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-#pragma once
-
-#include <IAEngine/Components/Component.hpp>
-
-namespace ia::iae
-{
-    class Physics;
-    class PhysicsBody2DComponent;
-
-    class BoxCollider2DComponent : public IComponent
-    {
-      public:
-        BoxCollider2DComponent(IN Node *node);
-
-        VOID OnCollisionEnter(IN Node *other);
-        VOID OnCollisionExit(IN Node *other);
-
-      public:
-        VOID SetCollisionEnterCallback(IN std::function<VOID(IN Node *)> callback)
-        {
-            m_collisionEnterCallback = callback;
-        }
-
-        VOID SetCollisionExitCallback(IN std::function<VOID(IN Node *)> callback)
-        {
-            m_collisionExitCallback = callback;
-        }
-
-      public:
-        BOOL &IsDebugDrawEnabled()
-        {
-            return m_isDebugDrawEnabled;
-        }
-
-        BOOL &CollisionsEnabled()
-        {
-            return m_collisionsEnabled;
-        }
-
-        BOOL &IsTrigger()
-        {
-            return m_isTrigger;
-        }
-
-        glm::vec4 &Rect()
-        {
-            return m_rect;
-        }
-
-        Handle PhysicsHandle() CONST
-        {
-            return m_physicsHandle;
-        }
-
-      public:
-        VOID Draw();
-        VOID Update();
-
-      private:
-        glm::vec4 m_rect{};
-        BOOL m_isTrigger{false};
-        BOOL m_isDebugDrawEnabled{false};
-        BOOL m_collisionsEnabled{true};
-        Handle m_physicsHandle{INVALID_HANDLE};
-        PhysicsBody2DComponent *m_body{};
-        std::function<VOID(IN Node *)> m_collisionEnterCallback{};
-        std::function<VOID(IN Node *)> m_collisionExitCallback{};
-    };
-} // namespace ia::iae

Src/IAEngine/inc/IAEngine/Components/Physics.hpp

@@ -20,37 +20,42 @@
 
 namespace ia::iae
 {
-    class PhysicsBody2DComponent : public IComponent
+    class PhysicsComponent : public IComponent
     {
       public:
-        PhysicsBody2DComponent(IN Node *node);
+        struct Collider
-
+        {
-        VOID SetVelocity(IN glm::vec2 v);
+            BOOL IsTrigger{false};
-        VOID SetVelocityX(IN FLOAT32 v);
+            glm::vec2 Position{};
-        VOID SetVelocityY(IN FLOAT32 v);
+            glm::vec2 Size{};
-        VOID ApplyForce(IN glm::vec2 force);
+        };
-
-        VOID Jump(IN FLOAT32 velocity);
 
       public:
-        BOOL &IsGrounded()
+        PhysicsComponent(IN Node *node);
-        {
+        ~PhysicsComponent();
-            return m_isGrounded;
-        }
 
+        Handle CreateCollider();
+        Handle AddCollider(IN Collider collider);
+        Collider &GetCollider(IN Handle handle);
+
+        VOID Move(IN glm::vec2 direction);
+
+        VOID Jump(IN FLOAT32 force);
+
+      public:
         BOOL &IsDynamic()
         {
             return m_isDynamic;
         }
 
-        BOOL &IsRotationLocked()
+        FLOAT32 &MovementSpeed()
         {
-            return m_isRotationLocked;
+            return m_movementSpeed;
         }
 
-        Handle PhysicsHandle() CONST
+        Vector<Collider> &Colliders()
         {
-            return m_physicsHandle;
+            return m_colliders;
         }
 
       public:
@@ -58,9 +63,13 @@ namespace ia::iae
         VOID Update();
 
       private:
-        BOOL m_isDynamic{};
+        BOOL m_isDynamic{false};
-        BOOL m_isGrounded{};
+        FLOAT32 m_movementSpeed{2.0f};
-        BOOL m_isRotationLocked{true};
+        Vector<Collider> m_colliders;
         Handle m_physicsHandle{INVALID_HANDLE};
+
+        VOID OnCollision(IN PhysicsComponent *other);
+
+        friend class Physics;
     };
 } // namespace ia::iae

Src/IAEngine/inc/IAEngine/Nodes/Transform.hpp

@@ -23,6 +23,30 @@ namespace ia::iae
     template<typename _node_type> class Transform
     {
       public:
+        VOID Translate(IN glm::vec2 v)
+        {
+            m_local.Position += v;
+            RecalculatePosition();
+        }
+
+        VOID Scale(IN FLOAT32 v)
+        {
+            m_local.Scale *= v;
+            RecalculateScale();
+        }
+
+        VOID Scale(IN glm::vec2 v)
+        {
+            m_local.Scale *= v;
+            RecalculateScale();
+        }
+
+        VOID Rotate(IN FLOAT32 v)
+        {
+            m_local.Rotation += v;
+            RecalculateRotation();
+        }
+
         VOID SetLocalSortIndex(IN INT16 index)
         {
             m_local.SortIndex = index;

Src/IAEngine/inc/IAEngine/Physics/Physics.hpp

@@ -16,29 +16,24 @@
 
 #pragma once
 
-#include <IAEngine/Components/BoxCollider2D.hpp>
+#include <IAEngine/Physics/Physics.hpp>
-#include <IAEngine/Components/PhysicsBody2D.hpp>
+#include <IAEngine/Components/Physics.hpp>
 
 namespace ia::iae
 {
     class Physics
     {
     public:
+        STATIC Handle RegisterComponent(IN PhysicsComponent* component);
+
+        STATIC BOOL CanMove(IN Handle handle, IN CONST PhysicsComponent::Collider& collider, IN glm::vec2 movement);
+
+    private:
         STATIC VOID Initialize();
         STATIC VOID Terminate();
 
-        STATIC VOID Bake();
-
         STATIC VOID Update();
 
-        STATIC Handle AddBody(IN PhysicsBody2DComponent* body);
+        friend class Engine;
-        STATIC Handle AddColliderToBody(IN Handle bodyHandle, IN BoxCollider2DComponent* collider);
-
-        STATIC FLOAT32 GetBodyRotation(IN Handle handle);
-        STATIC glm::vec2 GetBodyPosition(IN Handle handle);
-        STATIC VOID SetBodyVelocity(IN Handle handle, IN glm::vec2 v);
-        STATIC VOID SetBodyVelocityX(IN Handle handle, IN FLOAT32 v);
-        STATIC VOID SetBodyVelocityY(IN Handle handle, IN FLOAT32 v);
-        STATIC VOID ApplyBodyForce(IN Handle handle, IN glm::vec2 force);
     };
 }

Src/IAEngine/inc/IAEngine/Rendering/DebugDraw.hpp

@@ -0,0 +1,47 @@
+// IAEngine: 2D Game Engine by IA
+// Copyright (C) 2025 IAS (ias@iasoft.dev)
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#pragma once
+
+#include <IAEngine/Rendering/Types.hpp>
+
+namespace ia::iae
+{
+    class DebugDraw
+    {
+      public:
+        STATIC Handle AddLine(IN CONST glm::vec2& from, IN CONST glm::vec2& to, IN CONST glm::vec4& color, IN FLOAT32 thickness = 1.0f);
+        STATIC Handle AddRect(IN CONST glm::vec2& position, IN CONST glm::vec2& size, IN CONST glm::vec4& color);
+        STATIC Handle AddUIWindow(IN PCCHAR title, IN CONST glm::vec2 &position, IN CONST glm::vec2 &size,
+                                     IN std::function<VOID()> contentDrawCallback);
+
+        STATIC VOID SetLineVisibility(IN Handle handle, IN BOOL visible);
+        STATIC VOID SetRectVisibility(IN Handle handle, IN BOOL visible);
+        STATIC VOID SetUIWindowVisibility(IN Handle handle, IN BOOL visible);
+
+        STATIC VOID ToggleLineVisibility(IN Handle handle);
+        STATIC VOID ToggleRectVisibility(IN Handle handle);
+        STATIC VOID ToggleUIWindowVisibility(IN Handle handle);
+
+      private:
+        STATIC VOID Initailize();
+        STATIC VOID Terminate();
+
+        STATIC VOID Draw();
+
+        friend class Renderer;
+    };
+} // namespace ia::iae

Src/IAEngine/inc/IAEngine/Rendering/Pipeline/PostProcess.hpp

@@ -0,0 +1,35 @@
+// IAEngine: 2D Game Engine by IA
+// Copyright (C) 2025 IAS (ias@iasoft.dev)
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#pragma once
+
+#include <IAEngine/Rendering/Pipeline/Pipeline.hpp>
+
+namespace ia::iae
+{
+    class Pipeline_PostProcess: public IPipeline
+    {
+    public:
+        ~Pipeline_PostProcess();
+
+        STATIC RefPtr<Pipeline_PostProcess> Create();
+
+        VOID Bind(IN Handle renderPassHandle);
+
+    private:
+        Handle m_handle{INVALID_HANDLE};
+    };
+}

Src/IAEngine/inc/IAEngine/Rendering/Renderer.hpp

@@ -24,14 +24,6 @@ namespace ia::iae
 
     class Renderer
     {
-        struct DebugUIWindow
-        {
-            PCCHAR Title{""};
-            glm::vec2 Position{};
-            glm::vec2 Size{};
-            std::function<VOID()> ContentDrawCallback{};
-        };
-
       public:
         STATIC CONSTEXPR UINT8 MAX_LAYER_INDEX = 255;
 
@@ -39,10 +31,6 @@ namespace ia::iae
         STATIC BOOL Initialize();
         STATIC VOID Terminate();
 
-      public:
-        STATIC VOID AddDebugUIWindow(IN PCCHAR title, IN CONST glm::vec2 &position, IN CONST glm::vec2 &size,
-                                     IN std::function<VOID()> contentDrawCallback);
-
       public:
         STATIC VOID BeginFrame();
         STATIC VOID EndFrame();
@@ -82,6 +70,5 @@ namespace ia::iae
       private:
         STATIC INT32 s_width;
         STATIC INT32 s_height;
-        STATIC Vector<DebugUIWindow> s_debugUIWindows;
     };
 } // namespace ia::iae

Src/IAEngine/srcgen/embed_shaders.py

@@ -34,7 +34,9 @@ SHADER_SOURCE_PATH = "Src/IAEngine/imp/glsl"
 
 SHADER_SOURCE_FILES = [
     "UnlitMesh/UnlitMesh.vert",
-    "UnlitMesh/UnlitMesh.frag"
+    "UnlitMesh/UnlitMesh.frag",
+    "PostProcessing/PostProcess.vert",
+    "PostProcessing/PostProcess.frag"
 ]
 
 def file_to_source_array(arrayName, filePath):

Vendor/CMakeLists.txt

@@ -54,7 +54,3 @@ add_library(Freetype::Freetype ALIAS freetype)
 # -----------------------------------------------
 add_subdirectory(RmlUI/)
 
-# -----------------------------------------------
-#  Box2D
-# -----------------------------------------------
-add_subdirectory(box2d/)