llvowlsky.h
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- /**
- * @file llvowlsky.h
- * @brief LLVOWLSky class definition
- *
- * $LicenseInfo:firstyear=2007&license=viewergpl$
- *
- * Copyright (c) 2007-2010, 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