text: //
  // Copyright (c) 2008-2020 the Urho3D project.
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the "Software"), to deal
  // in the Software without restriction, including without limitation the rights
  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  // copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included in
  // all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  // THE SOFTWARE.
  //
  
  #include "../Precompiled.h"
  
  #include "../Core/Context.h"
  #include "../Urho2D/CollisionCircle2D.h"
  #include "../Urho2D/PhysicsUtils2D.h"
  
  #include "../DebugNew.h"
  
  namespace Urho3D
  {
  
  extern const char* URHO2D_CATEGORY;
  static const float DEFAULT_CLRCLE_RADIUS(0.01f);
  
  CollisionCircle2D::CollisionCircle2D(Context* context) :
      CollisionShape2D(context),
      radius_(DEFAULT_CLRCLE_RADIUS),
      center_(Vector2::ZERO)
  {
      circleShape_.m_radius = DEFAULT_CLRCLE_RADIUS * cachedWorldScale_.x_;
      fixtureDef_.shape = &circleShape_;
  }
  
  CollisionCircle2D::~CollisionCircle2D() = default;
  
  void CollisionCircle2D::RegisterObject(Context* context)
  {
      context->RegisterFactory<CollisionCircle2D>(URHO2D_CATEGORY);
  
      URHO3D_ACCESSOR_ATTRIBUTE("Is Enabled", IsEnabled, SetEnabled, bool, true, AM_DEFAULT);
      URHO3D_ACCESSOR_ATTRIBUTE("Radius", GetRadius, SetRadius, float, DEFAULT_CLRCLE_RADIUS, AM_DEFAULT);
      URHO3D_ACCESSOR_ATTRIBUTE("Center", GetCenter, SetCenter, Vector2, Vector2::ZERO, AM_DEFAULT);
      URHO3D_COPY_BASE_ATTRIBUTES(CollisionShape2D);
  }
  
  void CollisionCircle2D::SetRadius(float radius)
  {
      if (radius == radius_)
          return;
  
      radius_ = radius;
  
      RecreateFixture();
      MarkNetworkUpdate();
  }
  
  void CollisionCircle2D::SetCenter(const Vector2& center)
  {
      if (center == center_)
          return;
  
      center_ = center;
  
      RecreateFixture();
      MarkNetworkUpdate();
  }
  
  void CollisionCircle2D::SetCenter(float x, float y)
  {
      SetCenter(Vector2(x, y));
  }
  
  void CollisionCircle2D::ApplyNodeWorldScale()
  {
      RecreateFixture();
  }
  
  void CollisionCircle2D::RecreateFixture()
  {
      ReleaseFixture();
  
      // Only use scale in x axis for circle
      float worldScale = cachedWorldScale_.x_;
      circleShape_.m_radius = radius_ * worldScale;
      circleShape_.m_p = ToB2Vec2(center_ * worldScale);
  
      CreateFixture();
  }
  
  }
  