112 lines
3.9 KiB
C++
112 lines
3.9 KiB
C++
/**
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* @file llvowlsky.h
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* @brief LLVOWLSky class definition
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*
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* $LicenseInfo:firstyear=2007&license=viewergpl$
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*
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* Copyright (c) 2007-2009, Linden Research, Inc.
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*
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* Second Life Viewer Source Code
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* The source code in this file ("Source Code") is provided by Linden Lab
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* to you under the terms of the GNU General Public License, version 2.0
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* ("GPL"), unless you have obtained a separate licensing agreement
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* ("Other License"), formally executed by you and Linden Lab. Terms of
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* the GPL can be found in doc/GPL-license.txt in this distribution, or
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* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
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*
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* There are special exceptions to the terms and conditions of the GPL as
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* it is applied to this Source Code. View the full text of the exception
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* in the file doc/FLOSS-exception.txt in this software distribution, or
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* online at
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* http://secondlifegrid.net/programs/open_source/licensing/flossexception
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*
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* By copying, modifying or distributing this software, you acknowledge
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* that you have read and understood your obligations described above,
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* and agree to abide by those obligations.
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*
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* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
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* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
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* COMPLETENESS OR PERFORMANCE.
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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*/ BOOL idleUpdate(LLAgent &agent, LLWorld &world, 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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