/** * @file llvowlsky.h * @brief LLVOWLSky class definition * * $LicenseInfo:firstyear=2007&license=viewerlgpl$ * Second Life Viewer Source Code * Copyright (C) 2010, 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_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