Imported existing code

indra/newview/llvograss.h

@@ -0,0 +1,130 @@
+/** 
+ * @file llvograss.h
+ * @brief Description of LLVOGrass class
+ *
+ * $LicenseInfo:firstyear=2001&license=viewergpl$
+ * 
+ * Copyright (c) 2001-2009, 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_LLVOGRASS_H
+#define LL_LLVOGRASS_H
+
+#include "llviewerobject.h"
+#include "lldarray.h"
+#include <map>
+
+class LLSurfacePatch;
+class LLViewerImage;
+
+
+class LLVOGrass : public LLAlphaObject
+{
+public:
+	LLVOGrass(const LLUUID &id, const LLPCode pcode, LLViewerRegion *regionp);
+
+	// Initialize data that's only inited once per class.
+	static void initClass();
+	static void cleanupClass();
+
+	virtual U32 getPartitionType() const;
+
+	/*virtual*/ U32 processUpdateMessage(LLMessageSystem *mesgsys,
+											void **user_data,
+											U32 block_num, 
+											const EObjectUpdateType update_type,
+											LLDataPacker *dp);
+	static void import(LLFILE *file, LLMessageSystem *mesgsys, const LLVector3 &pos);
+	/*virtual*/ void exportFile(LLFILE *file, const LLVector3 &position);
+
+	void updateDrawable(BOOL force_damped);
+
+	/*virtual*/ LLDrawable* createDrawable(LLPipeline *pipeline);
+	/*virtual*/ BOOL		updateGeometry(LLDrawable *drawable);
+	/*virtual*/ void		getGeometry(S32 idx,
+								LLStrider<LLVector3>& verticesp,
+								LLStrider<LLVector3>& normalsp, 
+								LLStrider<LLVector2>& texcoordsp,
+								LLStrider<LLColor4U>& colorsp, 
+								LLStrider<U16>& indicesp);
+
+	void updateFaceSize(S32 idx) { }
+	/*virtual*/ void updateTextures();											
+	/*virtual*/ BOOL updateLOD();
+	/*virtual*/ void setPixelAreaAndAngle(LLAgent &agent); // generate accurate apparent angle and area
+
+	void plantBlades();
+
+	/*virtual*/ BOOL    isActive() const; // Whether this object needs to do an idleUpdate.
+	BOOL idleUpdate(LLAgent &agent, LLWorld &world, const F64 &time);
+
+	/*virtual*/ BOOL lineSegmentIntersect(const LLVector3& start, const LLVector3& end, 
+										  S32 face = -1,                        // which face to check, -1 = ALL_SIDES
+										  BOOL pick_transparent = FALSE,
+										  S32* face_hit = NULL,                 // which face was hit
+										  LLVector3* intersection = NULL,       // return the intersection point
+										  LLVector2* tex_coord = NULL,          // return the texture coordinates of the intersection point
+										  LLVector3* normal = NULL,             // return the surface normal at the intersection point
+										  LLVector3* bi_normal = NULL           // return the surface bi-normal at the intersection point
+		);
+
+	static S32 sMaxGrassSpecies;
+
+	struct GrassSpeciesData
+	{
+		LLUUID	mTextureID;
+		
+		F32		mBladeSizeX;
+		F32		mBladeSizeY;
+	};
+
+	typedef std::map<U32, GrassSpeciesData*> SpeciesMap;
+
+	U8				mSpecies;		// Species of grass
+	F32				mBladeSizeX;
+	F32				mBladeSizeY;
+	
+	LLSurfacePatch           *mPatch;			//  Stores the land patch where the grass is centered
+
+	U64 mLastPatchUpdateTime;
+
+	LLVector3		          mGrassBend;		// Accumulated wind (used for blowing trees)
+	LLVector3		          mGrassVel;		
+	LLVector3		          mWind;
+	F32				          mBladeWindAngle;
+	F32				          mBWAOverlap;
+
+protected:
+	~LLVOGrass();
+
+private:
+	void updateSpecies();
+	F32 mLastHeight;		// For cheap update hack
+	S32 mNumBlades;
+
+	static SpeciesMap sSpeciesTable;
+};
+#endif // LL_VO_GRASS_