box collider

src/object/components/boxcollider.cpp

@@ -1,4 +1,5 @@
 #include <object/components/boxcollider.hpp>
+#include <object/entity.hpp>
 
 namespace Game::Object::Components {
     BoxCollider::BoxCollider(const BoxCollider& other) : Component(other) {
@@ -31,5 +32,44 @@ namespace Game::Object::Components {
 
     void BoxCollider::update(float deltaTime, Object::Entity* thisEntity) {
         // Collision detection and response logic can go here
+
+        // Make box bounds
+        Transform* transform = thisEntity->getTransform();
+        float halfWidth = transform->scaleX * UNIVERSAL_SCALE_COEFFICIENT * 0.5f;
+        float halfHeight = transform->scaleY * UNIVERSAL_SCALE_COEFFICIENT * 0.5f;
+        float left = transform->x - halfWidth;
+        float right = transform->x + halfWidth;
+        float top = transform->y - halfHeight;
+        float bottom = transform->y + halfHeight;
+
+        mBounds = {left, right, top, bottom};
+
+        // Check for collisions with other entities that have box colliders
+        // For simplicity, just check each
+        std::vector<Entity*> entities = State::GameState::getInstance().getEntitiesSnapshot();
+        for (Entity* other : entities) {
+            if (other == thisEntity) continue; // Don't check collision with self
+            BoxCollider* otherCollider = other->getComponent<BoxCollider>();
+            if (!otherCollider) continue; // No collider, skip
+            BoxColliderBounds otherBounds = otherCollider->getBounds();
+            if (left < otherBounds.right && right > otherBounds.left && top < otherBounds.bottom && bottom > otherBounds.top) {
+                // Collision detected
+                if (!mIsColliding) {
+                    mIsColliding = true;
+                    thisEntity->onCollisionEnter(other);
+                    other->onCollisionEnter(thisEntity);
+                } else {
+                    thisEntity->onCollisionStay(other);
+                    other->onCollisionStay(thisEntity);
+                }
+            } else {
+                // No collision
+                if (mIsColliding) {
+                    mIsColliding = false;
+                    thisEntity->onCollisionExit(other);
+                    other->onCollisionExit(thisEntity);
+                }
+            }
+        }
     }
 }