Isolate irrlicht references and use a singleton (#6041)

* Add Device3D class which will contain IrrlichtDevice interface

move getSupportedVideoDrivers to Device3D

Add Device3D singleton & use it in various places

Rename Device3D to Rendering engine & add helper functions to various device pointers

More singleton work

RenderingEngine owns draw_load_screen

move draw functions to RenderingEngine

Reduce IrrlichtDevice exposure and guienvironment

RenderingEngine: Expose get_timer_time() to remove device from guiEngine

Make irrlichtdevice & scene manager less exposed

* Code style fixes

* Move porting::getVideoDriverName, getVideoDriverFriendlyName, getDisplayDensity, getDisplaySize to RenderingEngine

Fix XORG_USED macro -> RenderingEngine + create_engine_device from RenderingEngine constructor directly

* enum paralax => enum parallax

1 files changed, 4 insertions, 3 deletions

diff --git a/src/sky.cpp b/src/sky.cpp
index 3176ea936..463400194 100644
--- a/src/sky.cpp
+++ b/src/sky.cpp
@@ -8,13 +8,14 @@
 #include "profiler.h"
 #include "util/numeric.h"
 #include <cmath>
+#include "client/renderingengine.h"
 #include "settings.h"
 #include "camera.h"  // CameraModes
 
 
-Sky::Sky(scene::ISceneNode* parent, scene::ISceneManager* mgr, s32 id,
-		ITextureSource *tsrc):
-		scene::ISceneNode(parent, mgr, id)
+Sky::Sky(s32 id, ITextureSource *tsrc):
+		scene::ISceneNode(RenderingEngine::get_scene_manager()->getRootSceneNode(),
+			RenderingEngine::get_scene_manager(), id)
 {
 	setAutomaticCulling(scene::EAC_OFF);
 	m_box.MaxEdge.set(0, 0, 0);