text: /*
      This file is part of Magnum.
  
      Original authors — credit is appreciated but not required:
  
          2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 —
              Vladimír Vondruš <mosra@centrum.cz>
  
      This is free and unencumbered software released into the public domain.
  
      Anyone is free to copy, modify, publish, use, compile, sell, or distribute
      this software, either in source code form or as a compiled binary, for any
      purpose, commercial or non-commercial, and by any means.
  
      In jurisdictions that recognize copyright laws, the author or authors of
      this software dedicate any and all copyright interest in the software to
      the public domain. We make this dedication for the benefit of the public
      at large and to the detriment of our heirs and successors. We intend this
      dedication to be an overt act of relinquishment in perpetuity of all
      present and future rights to this software under copyright law.
  
      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 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 <Corrade/PluginManager/Manager.h>
  #include <Magnum/GL/AbstractShaderProgram.h>
  #include <Magnum/GL/Buffer.h>
  #include <Magnum/GL/Context.h>
  #include <Magnum/GL/CubeMapTexture.h>
  #include <Magnum/GL/DefaultFramebuffer.h>
  #include <Magnum/GL/Extensions.h>
  #include <Magnum/GL/Mesh.h>
  #include <Magnum/GL/Renderer.h>
  #include <Magnum/GL/Texture.h>
  #include <Magnum/Platform/Sdl2Application.h>
  #include <Magnum/SceneGraph/Drawable.h>
  #include <Magnum/SceneGraph/Scene.h>
  #include <Magnum/SceneGraph/Camera.h>
  #include <Magnum/Trade/AbstractImporter.h>
  
  #include "CubeMap.h"
  #include "Reflector.h"
  #include "Types.h"
  
  namespace Magnum { namespace Examples {
  
  class CubeMapExample: public Platform::Application {
      public:
          explicit CubeMapExample(const Arguments& arguments);
  
      private:
          void viewportEvent(ViewportEvent& event) override;
          void drawEvent() override;
          void keyPressEvent(KeyEvent& event) override;
  
          CubeMapResourceManager _resourceManager;
          Scene3D _scene;
          SceneGraph::DrawableGroup3D _drawables;
          Object3D* _cameraObject;
          SceneGraph::Camera3D* _camera;
  };
  
  CubeMapExample::CubeMapExample(const Arguments& arguments): Platform::Application(arguments, Configuration().setTitle("Magnum Cube Map Example")) {
      GL::Renderer::enable(GL::Renderer::Feature::DepthTest);
      GL::Renderer::enable(GL::Renderer::Feature::FaceCulling);
  
      /* Set up perspective camera */
      (_cameraObject = new Object3D(&_scene))
          ->translate(Vector3::zAxis(3.0f));
      (_camera = new SceneGraph::Camera3D(*_cameraObject))
          ->setAspectRatioPolicy(SceneGraph::AspectRatioPolicy::Extend)
          .setProjectionMatrix(Matrix4::perspectiveProjection(Deg(55.0f), 1.0f, 0.001f, 100.0f))
          .setViewport(GL::defaultFramebuffer.viewport().size());
  
      /* Load TGA importer plugin */
      PluginManager::Manager<Trade::AbstractImporter> manager;
      std::unique_ptr<Trade::AbstractImporter> importer = manager.loadAndInstantiate("JpegImporter");
      if(!importer) std::exit(1);
  
      _resourceManager.set<Trade::AbstractImporter>("jpeg-importer",
          importer.release(), ResourceDataState::Final, ResourcePolicy::Manual);
  
      /* Add objects to scene */
      (new CubeMap(arguments.argc == 2 ? arguments.argv[1] : "", &_scene, &_drawables))
          ->scale(Vector3(20.0f));
  
      (new Reflector(&_scene, &_drawables))
          ->scale(Vector3(0.5f))
          .translate(Vector3::xAxis(-0.5f));
  
      (new Reflector(&_scene, &_drawables))
          ->scale(Vector3(0.3f))
          .rotate(Deg(37.0f), Vector3::xAxis())
          .translate(Vector3::xAxis(0.3f));
  
      /* We don't need the importer anymore */
      _resourceManager.free<Trade::AbstractImporter>();
  }
  
  void CubeMapExample::viewportEvent(ViewportEvent& event) {
      GL::defaultFramebuffer.setViewport({{}, event.framebufferSize()});
      _camera->setViewport(event.windowSize());
  }
  
  void CubeMapExample::drawEvent() {
      GL::defaultFramebuffer.clear(GL::FramebufferClear::Depth);
      GL::defaultFramebuffer.invalidate({GL::DefaultFramebuffer::InvalidationAttachment::Color});
  
      _camera->draw(_drawables);
      swapBuffers();
  }
  
  void CubeMapExample::keyPressEvent(KeyEvent& event) {
      if(event.key() == KeyEvent::Key::Up)
          _cameraObject->rotate(Deg(-10.0f), _cameraObject->transformation().right().normalized());
  
      else if(event.key() == KeyEvent::Key::Down)
          _cameraObject->rotate(Deg(10.0f), _cameraObject->transformation().right().normalized());
  
      else if(event.key() == KeyEvent::Key::Left || event.key() == KeyEvent::Key::Right) {
          Float translationY = _cameraObject->transformation().translation().y();
          _cameraObject->translate(Vector3::yAxis(-translationY))
              .rotateY(event.key() == KeyEvent::Key::Left ? Deg(10.0f) : Deg(-10.0f))
              .translate(Vector3::yAxis(translationY));
  
      } else return;
  
      redraw();
  }
  
  }}
  
  MAGNUM_APPLICATION_MAIN(Magnum::Examples::CubeMapExample)
  