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diff --git a/indra/newview/llenvironment.h b/indra/newview/llenvironment.h
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+/**
+ * @file llenvmanager.h
+ * @brief Declaration of classes managing WindLight and water settings.
+ *
+ * $LicenseInfo:firstyear=2009&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2011, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_ENVIRONMENT_H
+#define LL_ENVIRONMENT_H
+
+#include "llmemory.h"
+#include "llsd.h"
+
+#include "llsettingssky.h"
+
+class LLViewerCamera;
+class LLGLSLShader;
+
+//-------------------------------------------------------------------------
+class LLEnvironment : public LLSingleton<LLEnvironment>
+{
+    LLSINGLETON(LLEnvironment);
+    LOG_CLASS(LLEnvironment);
+
+public:
+    virtual ~LLEnvironment();
+
+    LLSettingsSky::ptr_t    getCurrentSky() const { return mCurrentSky; }
+
+    void                    update(const LLViewerCamera * cam);
+
+    LLVector4               getRotatedLightDir() const { return mRotatedLight; }
+
+    void                    updateGLVariablesForSettings(LLGLSLShader *shader, const LLSettingsBase::ptr_t &psetting);
+    void                    updateShaderUniforms(LLGLSLShader *shader);
+
+    void                    addSky(const LLSettingsSky::ptr_t &sky);
+private:
+    static const F32        SUN_DELTA_YAW;
+
+    typedef std::map<std::string, LLSettingsSky::ptr_t> NamedSkyMap_t;
+    typedef std::map<LLUUID, LLSettingsSky::ptr_t> AssetSkyMap_t;
+
+    LLVector4               mRotatedLight;
+    LLVector2               mCloudScroll;
+
+    LLSettingsSky::ptr_t    mCurrentSky;
+
+    NamedSkyMap_t           mSkysByName;
+    AssetSkyMap_t           mSkysById;
+
+    void addSky(const LLUUID &id, const LLSettingsSky::ptr_t &sky);
+    void removeSky(const std::string &name);
+    void removeSky(const LLUUID &id);
+    void clearAllSkys();
+
+    void updateCloudScroll();
+};
+
+
+#endif // LL_ENVIRONMENT_H
+