106 lines
3.5 KiB
C++
Executable File
106 lines
3.5 KiB
C++
Executable File
/**
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* @file llvowlsky.h
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* @brief LLVOWLSky class definition
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*
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* $LicenseInfo:firstyear=2007&license=viewerlgpl$
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* Second Life Viewer Source Code
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* Copyright (C) 2010, Linden Research, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License only.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
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* $/LicenseInfo$
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*/
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#ifndef LL_VOWLSKY_H
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#define LL_VOWLSKY_H
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#include "llviewerobject.h"
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class LLVOWLSky : public LLStaticViewerObject {
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private:
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static const F32 DISTANCE_TO_STARS;
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// anything less than 3 makes it impossible to create a closed dome.
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static const U32 MIN_SKY_DETAIL;
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// anything bigger than about 180 will cause getStripsNumVerts() to exceed 65535.
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static const U32 MAX_SKY_DETAIL;
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inline static U32 getNumStacks(void);
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inline static U32 getNumSlices(void);
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inline static U32 getFanNumVerts(void);
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inline static U32 getFanNumIndices(void);
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inline static U32 getStripsNumVerts(void);
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inline static U32 getStripsNumIndices(void);
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inline static U32 getStarsNumVerts(void);
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inline static U32 getStarsNumIndices(void);
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public:
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LLVOWLSky(const LLUUID &id, const LLPCode pcode, LLViewerRegion *regionp);
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void initSunDirection(LLVector3 const & sun_direction,
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LLVector3 const & sun_angular_velocity);
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/*virtual*/ void idleUpdate(LLAgent &agent, const F64 &time);
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/*virtual*/ BOOL isActive(void) const;
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/*virtual*/ LLDrawable * createDrawable(LLPipeline *pipeline);
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/*virtual*/ BOOL updateGeometry(LLDrawable *drawable);
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void drawStars(void);
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void drawDome(void);
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void resetVertexBuffers(void);
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void cleanupGL();
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void restoreGL();
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private:
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// a tiny helper function for controlling the sky dome tesselation.
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static F32 calcPhi(U32 i);
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// helper function for initializing the stars.
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void initStars();
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// helper function for building the fan vertex buffer.
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static void buildFanBuffer(LLStrider<LLVector3> & vertices,
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LLStrider<LLVector2> & texCoords,
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LLStrider<U16> & indices);
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// helper function for building the strips vertex buffer.
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// note begin_stack and end_stack follow stl iterator conventions,
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// begin_stack is the first stack to be included, end_stack is the first
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// stack not to be included.
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static void buildStripsBuffer(U32 begin_stack, U32 end_stack,
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LLStrider<LLVector3> & vertices,
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LLStrider<LLVector2> & texCoords,
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LLStrider<U16> & indices);
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// helper function for updating the stars colors.
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void updateStarColors();
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// helper function for updating the stars geometry.
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BOOL updateStarGeometry(LLDrawable *drawable);
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private:
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LLPointer<LLVertexBuffer> mFanVerts;
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std::vector< LLPointer<LLVertexBuffer> > mStripsVerts;
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LLPointer<LLVertexBuffer> mStarsVerts;
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std::vector<LLVector3> mStarVertices; // Star verticies
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std::vector<LLColor4> mStarColors; // Star colors
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std::vector<F32> mStarIntensities; // Star intensities
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};
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#endif // LL_VOWLSKY_H
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