Fixes

Engine/Src/Imp/CPP/Physics.cpp

@@ -0,0 +1,95 @@
+// IAEngine: 2D Game Engine by IA
+// Copyright (C) 2025 IASoft (PVT) LTD (oss@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/Engine.hpp>
+#include <Physics.hpp>
+
+namespace ia::iae
+{
+    BOOL g_physicsDebugDrawEnabled = false;
+
+    Vector<PhysicsComponent *> g_physicsComponents;
+
+    VOID Physics::Initialize()
+    {
+    }
+
+    VOID Physics::Terminate()
+    {
+    }
+
+    VOID Physics::Update()
+    {
+        if(Engine::WasInputKeyPressed(InputKey::F6))
+            g_physicsDebugDrawEnabled = !g_physicsDebugDrawEnabled;
+    }
+
+    VOID Physics::DebugDraw()
+    {
+        if (!g_physicsDebugDrawEnabled)
+            return;
+
+        for (const auto &t : g_physicsComponents)
+        {
+            for (const auto &c : t->Colliders())
+            {
+                auto color = Color{192, 0, 0, 0xFF};
+                if (c.IsTrigger)
+                    color = {64, 96, 192, 192};
+                Engine::DebugDraw_SetColor(color);
+                Engine::DebugDraw_SetStrokeWidth(2);
+                Engine::DebugDraw_StrokeRect(t->GetNode()->GetPosition() + c.Position -
+                                                 Engine::GetActiveCamera()->GetNode()->GetPosition(),
+                                             c.Size);
+            }
+        }
+    }
+
+    Handle Physics::RegisterComponent(IN PhysicsComponent *component)
+    {
+        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 pos = comp->GetNode()->GetPosition() + movement + collider.Position;
+        for (const auto &t : g_physicsComponents)
+        {
+            if (t == comp)
+                continue;
+            for (const auto &tc : t->Colliders())
+            {
+                const auto tPos = t->GetNode()->GetPosition() + tc.Position;
+                const auto xColliding = ((pos.x + collider.Size.x) >= tPos.x) && ((tPos.x + tc.Size.x) >= pos.x);
+                const auto yColliding = ((pos.y + collider.Size.y) >= tPos.y) && ((tPos.y + tc.Size.y) >= pos.y);
+                if (xColliding && yColliding)
+                {
+                    // Collision callback
+                    comp->OnCollision(t);
+                    t->OnCollision(comp);
+
+                    // Overlap block
+                    if (tc.IsTrigger)
+                        continue;
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
+} // namespace ia::iae