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Diffstat (limited to 'indra/newview/llvowlsky.h')
| -rw-r--r-- | indra/newview/llvowlsky.h | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/indra/newview/llvowlsky.h b/indra/newview/llvowlsky.h new file mode 100644 index 0000000000..dcb4b851a2 --- /dev/null +++ b/indra/newview/llvowlsky.h @@ -0,0 +1,110 @@ +/** + * @file llvowlsky.h + * @brief LLVOWLSky class definition + * + * $LicenseInfo:firstyear=2007&license=viewergpl$ + * + * Copyright (c) 2007-2007, 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://secondlife.com/developers/opensource/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://secondlife.com/developers/opensource/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 |