Second Life viewer sources 1.19.1.0

1 files changed, 110 insertions, 0 deletions

diff --git a/linden/indra/newview/llvowlsky.h b/linden/indra/newview/llvowlsky.h
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+++ b/linden/indra/newview/llvowlsky.h
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+/** 
+ * @file llvowlsky.h
+ * @brief LLVOWLSky class definition
+ *
+ * $LicenseInfo:firstyear=2007&license=viewergpl$
+ * 
+ * Copyright (c) 2007-2008, Linden Research, Inc.
+ * 
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_VOWLSKY_H
+#define LL_VOWLSKY_H
+
+#include "llviewerobject.h"
+
+class LLVOWLSky : public LLStaticViewerObject {
+private:
+        static const F32 DISTANCE_TO_STARS;
+
+        // anything less than 3 makes it impossible to create a closed dome.
+        static const U32 MIN_SKY_DETAIL;
+        // anything bigger than about 180 will cause getStripsNumVerts() to exceed 65535.
+        static const U32 MAX_SKY_DETAIL;
+
+        inline static U32 getNumStacks(void);
+        inline static U32 getNumSlices(void);
+        inline static U32 getFanNumVerts(void);
+        inline static U32 getFanNumIndices(void);
+        inline static U32 getStripsNumVerts(void);
+        inline static U32 getStripsNumIndices(void);
+        inline static U32 getStarsNumVerts(void);
+        inline static U32 getStarsNumIndices(void);
+
+public:
+        LLVOWLSky(const LLUUID &id, const LLPCode pcode, LLViewerRegion *regionp);
+
+        void initSunDirection(LLVector3 const & sun_direction,
+                LLVector3 const & sun_angular_velocity);
+
+        /*virtual*/ BOOL                 idleUpdate(LLAgent &agent, LLWorld &world, const F64 &time);
+        /*virtual*/ BOOL                 isActive(void) const;
+        /*virtual*/ LLDrawable * createDrawable(LLPipeline *pipeline);
+        /*virtual*/ BOOL                 updateGeometry(LLDrawable *drawable);
+
+        void drawStars(void);
+        void drawDome(void);
+        void resetVertexBuffers(void);
+        
+        void cleanupGL();
+        void restoreGL();
+
+private:
+        // a tiny helper function for controlling the sky dome tesselation.
+        static F32 calcPhi(U32 i);
+
+        // helper function for initializing the stars.
+        void initStars();
+
+        // helper function for building the fan vertex buffer.
+        static void buildFanBuffer(LLStrider<LLVector3> & vertices,
+                                                           LLStrider<LLVector2> & texCoords,
+                                                           LLStrider<U16> & indices);
+
+        // helper function for building the strips vertex buffer.
+        // note begin_stack and end_stack follow stl iterator conventions,
+        // begin_stack is the first stack to be included, end_stack is the first
+        // stack not to be included.
+        static void buildStripsBuffer(U32 begin_stack, U32 end_stack,
+                                                                  LLStrider<LLVector3> & vertices,
+                                                                  LLStrider<LLVector2> & texCoords,
+                                                                  LLStrider<U16> & indices);
+
+        // helper function for updating the stars colors.
+        void updateStarColors();
+
+        // helper function for updating the stars geometry.
+        BOOL updateStarGeometry(LLDrawable *drawable);
+
+private:
+        LLPointer<LLVertexBuffer>                                       mFanVerts;
+        std::vector< LLPointer<LLVertexBuffer> >        mStripsVerts;
+        LLPointer<LLVertexBuffer>                                       mStarsVerts;
+
+        std::vector<LLVector3>  mStarVertices;                          // Star verticies
+        std::vector<LLColor4>   mStarColors;                            // Star colors
+        std::vector<F32>                mStarIntensities;                       // Star intensities
+};
+
+#endif // LL_VOWLSKY_H