Only apply air friction if the ground is never hit during the frame.

src/Engine/Collision/CollisionSystem.cpp

@@ -20,6 +20,7 @@ void CollisionSystem::UpdateComponent(EntityWrapper& entity, ComponentWrapper& c
     // Collide against octree items
     m_OctreeResult.clear();
     m_Octree->ObjectsInSameRegion(*boundingBox, m_OctreeResult);
+    bool everHitTheGround = false;
     for (auto& boxB : m_OctreeResult) {
         glm::vec3 resolutionVector;
         if (boxA.Entity == boxB.Entity) {
@@ -43,17 +44,24 @@ void CollisionSystem::UpdateComponent(EntityWrapper& entity, ComponentWrapper& c
             if (Collision::AABBvsTriangles(boxA, model->m_Vertices, model->m_Indices, modelMatrix, inOutVelocity, verticalStepHeight, isOnGround, resolutionVector)) {
                 (glm::vec3&)cTransform["Position"] += resolutionVector;
                 cPhysics["Velocity"] = inOutVelocity;
-                (bool)cPhysics["IsOnGround"] = isOnGround;
-            } else {
-                (bool)cPhysics["IsOnGround"] = false;
+                if (isOnGround) {
+                    everHitTheGround = true;
+                    (bool)cPhysics["IsOnGround"] = true;
+                }
             }
         } else if (Collision::AABBVsAABB(boxA, boxB, resolutionVector)) {
             //Enter here if boxB has no Model.
             (glm::vec3&)cTransform["Position"] += resolutionVector;
-            (bool)cPhysics["IsOnGround"] = resolutionVector.y > 0;
-            if ((bool)cPhysics["IsOnGround"]){
+            if (resolutionVector.y > 0) {
+                everHitTheGround = true;
+                (bool)cPhysics["IsOnGround"] = true;
                 ((glm::vec3&)cPhysics["Velocity"]).y = 0.f;
             }
         }
     }
+
+    //This should apply air friction and such, iff zero models were hit.
+    if (!everHitTheGround) {
+        (bool)cPhysics["IsOnGround"] = false;
+    }
 }