Second Life viewer sources 1.13.2.12

1 files changed, 1296 insertions, 0 deletions

diff --git a/linden/indra/llmessage/partsyspacket.cpp b/linden/indra/llmessage/partsyspacket.cpp
new file mode 100644
index 0000000..d491540
--- /dev/null
+++ b/linden/indra/llmessage/partsyspacket.cpp
@@ -0,0 +1,1296 @@
+/** 
+ * @file partsyspacket.cpp
+ * @brief Object for packing particle system initialization parameters
+ * before sending them over the network.
+ *
+ * Copyright (c) 2000-2007, Linden Research, Inc.
+ * 
+ * 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.
+ */
+
+#include "linden_common.h"
+
+#include "partsyspacket.h"
+#include "imageids.h"
+
+// this function is global
+void gSetInitDataDefaults(LLPartInitData *setMe)
+{
+        U32 i;
+
+        //for(i = 0; i < 18; i++) 
+        //{
+        //      setMe->k[i] = 0.0f;
+        //}
+
+        //setMe->kill_p[0] = setMe->kill_p[1] = setMe->kill_p[2] = 0.0f;
+        //setMe->kill_p[3] = -0.2f; // time parameter, die when t= 5.0f
+        //setMe->kill_p[4] = 1.0f;
+        //setMe->kill_p[5] = -0.5f; // or radius == 2 (contracting)
+        
+        //setMe->bounce_p[0] = setMe->bounce_p[1] = 
+        //      setMe->bounce_p[2] = setMe->bounce_p[3] = 0.0f;
+        //setMe->bounce_p[4] = 1.0f;
+        
+        setMe->bounce_b = 1.0f;
+        // i just changed the meaning of bounce_b
+        // its now the attenuation from revlecting your velocity across the normal
+        // set by bounce_p
+        
+        //setMe->pos_ranges[0] = setMe->pos_ranges[2] = setMe->pos_ranges[4] = -1.0f;
+        //setMe->pos_ranges[1] = setMe->pos_ranges[3] = setMe->pos_ranges[5] =  1.0f;
+
+        //setMe->vel_ranges[0] = setMe->vel_ranges[2] = setMe->vel_ranges[4] = -1.0f;
+        //setMe->vel_ranges[1] = setMe->vel_ranges[3] = setMe->vel_ranges[5] =  1.0f;
+
+        for(i = 0; i < 3; i++) 
+        {
+                setMe->diffEqAlpha[i] = 0.0f;
+                setMe->diffEqScale[i] = 0.0f;
+        }
+
+        setMe->scale_range[0] = 1.00f;
+        setMe->scale_range[1] = 5.00f;
+        setMe->scale_range[2] = setMe->scale_range[3] = 0.0f;
+
+        setMe->alpha_range[0] = setMe->alpha_range[1] = 1.0f;
+        setMe->alpha_range[2] = setMe->alpha_range[3] = 0.0f;
+
+        setMe->vel_offset[0] = 0.0f; 
+        setMe->vel_offset[1] = 0.0f;
+        setMe->vel_offset[2] = 0.0f; 
+
+        // start dropping particles when I'm more then one sim away
+        setMe->mDistBeginFadeout = 256.0f;
+        setMe->mDistEndFadeout = 1.414f * 512.0f; 
+        // stop displaying particles when I'm more then two sim diagonals away
+
+        setMe->mImageUuid = IMG_SHOT;
+
+        for(i = 0; i < 8; i++)
+        {
+                setMe->mFlags[i] = 0x00;
+        }
+
+        setMe->createMe = TRUE;
+
+        setMe->maxParticles = 25;
+        setMe->initialParticles = 25;
+
+        //These defaults are for an explosion - a short lived set of debris affected by gravity.
+                //Action flags default to PART_SYS_AFFECTED_BY_WIND + PART_SYS_AFFECTED_BY_GRAVITY + PART_SYS_DISTANCE_DEATH 
+        setMe->mFlags[PART_SYS_ACTION_BYTE] = PART_SYS_AFFECTED_BY_WIND | PART_SYS_AFFECTED_BY_GRAVITY | PART_SYS_DISTANCE_DEATH;
+        setMe->mFlags[PART_SYS_KILL_BYTE] = PART_SYS_DISTANCE_DEATH + PART_SYS_TIME_DEATH;
+
+        setMe->killPlaneNormal[0] = 0.0f;setMe->killPlaneNormal[1] = 0.0f;setMe->killPlaneNormal[2] = 1.0f;             //Straight up
+        setMe->killPlaneZ = 0.0f;       //get local ground z as an approximation if turn on PART_SYS_KILL_PLANE
+        setMe->bouncePlaneNormal[0] = 0.0f;setMe->bouncePlaneNormal[1] = 0.0f;setMe->bouncePlaneNormal[2] = 1.0f;       //Straight up
+        setMe->bouncePlaneZ = 0.0f;     //get local ground z as an approximation if turn on PART_SYS_BOUNCE
+        setMe->spawnRange = 1.0f;
+        setMe->spawnFrequency = 0.0f;   //Create the instant one dies
+        setMe->spawnFreqencyRange = 0.0f;
+        setMe->spawnDirection[0] = 0.0f;setMe->spawnDirection[1] = 0.0f;setMe->spawnDirection[2] = 1.0f;                //Straight up
+        setMe->spawnDirectionRange = 1.0f;      //global scattering
+        setMe->spawnVelocity = 0.75f;
+        setMe->spawnVelocityRange = 0.25f;      //velocity +/- 0.25
+        setMe->speedLimit = 1.0f;
+
+        setMe->windWeight = 0.5f;       //0.0f means looks like a heavy object (if gravity is on), 1.0f means light and fluffy
+        setMe->currentGravity[0] = 0.0f;setMe->currentGravity[1] = 0.0f;setMe->currentGravity[2] = -9.81f;
+                //This has to be constant to allow for compression
+                
+        setMe->gravityWeight = 0.5f;    //0.0f means boyed by air, 1.0f means it's a lead weight
+        setMe->globalLifetime = 0.0f;   //Arbitrary, but default is no global die, so doesn't matter
+        setMe->individualLifetime = 5.0f;
+        setMe->individualLifetimeRange = 1.0f;  //Particles last 5 secs +/- 1
+        setMe->alphaDecay = 1.0f;       //normal alpha fadeout
+        setMe->scaleDecay = 0.0f;       //no scale decay
+        setMe->distanceDeath = 10.0f;   //die if hit unit radius
+        setMe->dampMotionFactor = 0.0f;
+
+        setMe->windDiffusionFactor[0] = 0.0f; 
+        setMe->windDiffusionFactor[1] = 0.0f;
+        setMe->windDiffusionFactor[2] = 0.0f; 
+}
+
+LLPartSysCompressedPacket::LLPartSysCompressedPacket()
+{
+        // default constructor for mDefaults called implicitly/automatically here
+        for(int i = 0; i < MAX_PART_SYS_PACKET_SIZE; i++) 
+        {
+                mData[i] = '\0';
+        }
+
+        gSetInitDataDefaults(&mDefaults);
+}
+
+LLPartSysCompressedPacket::~LLPartSysCompressedPacket()
+{
+        // no dynamic data is stored by this class, do nothing.
+}
+
+void LLPartSysCompressedPacket::writeFlagByte(LLPartInitData *in)
+{
+                mData[0] =  mData[1] = mData[2] = '\0';
+
+        U32 i;
+        //for(i = 1; i < 18; i++) {
+        //      if(in->k[i] != mDefaults.k[i])
+        //      {
+        //              mData[0] |= PART_SYS_K_MASK;
+        //              break;
+        //      }
+        //}
+
+        if(in->killPlaneZ != mDefaults.killPlaneZ ||
+                in->killPlaneNormal[0] != mDefaults.killPlaneNormal[0] || 
+                in->killPlaneNormal[1] != mDefaults.killPlaneNormal[1] ||
+                in->killPlaneNormal[2] != mDefaults.killPlaneNormal[2] ||
+                in->distanceDeath != mDefaults.distanceDeath)
+        {
+                mData[0] |= PART_SYS_KILL_P_MASK;
+        }
+
+        
+        
+        if(in->bouncePlaneZ != mDefaults.bouncePlaneZ ||
+                in->bouncePlaneNormal[0] != mDefaults.bouncePlaneNormal[0] || 
+                in->bouncePlaneNormal[1] != mDefaults.bouncePlaneNormal[1] ||
+                in->bouncePlaneNormal[2] != mDefaults.bouncePlaneNormal[2])
+        {
+                mData[0] |= PART_SYS_BOUNCE_P_MASK;
+        }
+        
+        if(in->bounce_b != mDefaults.bounce_b)
+        {
+                mData[0] |= PART_SYS_BOUNCE_B_MASK;
+        }
+
+        
+        //if(in->pos_ranges[0] != mDefaults.pos_ranges[0] || in->pos_ranges[1] != mDefaults.pos_ranges[1] ||
+        //      in->pos_ranges[2] != mDefaults.pos_ranges[2] || in->pos_ranges[3] != mDefaults.pos_ranges[3] ||
+        //      in->pos_ranges[4] != mDefaults.pos_ranges[4] || in->pos_ranges[5] != mDefaults.pos_ranges[5])
+        //{
+        //      mData[0] |= PART_SYS_POS_RANGES_MASK;
+        //}
+        
+        //if(in->vel_ranges[0] != mDefaults.vel_ranges[0] || in->vel_ranges[1] != mDefaults.vel_ranges[1] ||
+        //      in->vel_ranges[2] != mDefaults.vel_ranges[2] || in->vel_ranges[3] != mDefaults.vel_ranges[3] ||
+        //      in->vel_ranges[4] != mDefaults.vel_ranges[4] || in->vel_ranges[5] != mDefaults.vel_ranges[5])
+        //{
+//              mData[0] |= PART_SYS_VEL_RANGES_MASK;
+        //}
+
+
+        if(in->diffEqAlpha[0] != mDefaults.diffEqAlpha[0] || 
+                in->diffEqAlpha[1] != mDefaults.diffEqAlpha[1] ||
+                in->diffEqAlpha[2] != mDefaults.diffEqAlpha[2] ||
+                in->diffEqScale[0] != mDefaults.diffEqScale[0] || 
+                in->diffEqScale[1] != mDefaults.diffEqScale[1] ||
+                in->diffEqScale[2] != mDefaults.diffEqScale[2])
+        {
+                mData[0] |= PART_SYS_ALPHA_SCALE_DIFF_MASK;
+        }
+
+
+        if(in->scale_range[0] != mDefaults.scale_range[0] || 
+                in->scale_range[1] != mDefaults.scale_range[1] ||
+                in->scale_range[2] != mDefaults.scale_range[2] ||
+                in->scale_range[3] != mDefaults.scale_range[3])
+        {
+                mData[0] |= PART_SYS_SCALE_RANGE_MASK;
+        }
+
+        
+        if(in->alpha_range[0] != mDefaults.alpha_range[0] || 
+                in->alpha_range[1] != mDefaults.alpha_range[1] ||
+                in->alpha_range[2] != mDefaults.alpha_range[2] ||
+                in->alpha_range[3] != mDefaults.alpha_range[3])
+        {
+                mData[2] |= PART_SYS_BYTE_3_ALPHA_MASK;
+        }
+
+        if(in->vel_offset[0] != mDefaults.vel_offset[0] || 
+                in->vel_offset[1] != mDefaults.vel_offset[1] ||
+                in->vel_offset[2] != mDefaults.vel_offset[2])
+        {
+                mData[0] |= PART_SYS_VEL_OFFSET_MASK;
+        }
+
+
+        if(in->mImageUuid != mDefaults.mImageUuid)
+        {
+                mData[0] |= PART_SYS_M_IMAGE_UUID_MASK;
+        }
+
+        for( i = 0; i < 8; i++)
+        {
+                if(in->mFlags[i])
+                {
+                        mData[1] |= 1<<i;
+//                      llprintline("Flag \"%x\" gets byte \"%x\"\n", i<<i, in->mFlags[i]);
+                }
+        }
+
+
+        if(in->spawnRange != mDefaults.spawnRange ||
+                in->spawnFrequency != mDefaults.spawnFrequency ||
+                in->spawnFreqencyRange != mDefaults.spawnFreqencyRange ||
+                in->spawnDirection[0] != mDefaults.spawnDirection[0] || 
+                in->spawnDirection[1] != mDefaults.spawnDirection[1] ||
+                in->spawnDirection[2] != mDefaults.spawnDirection[2] ||
+                in->spawnDirectionRange != mDefaults.spawnDirectionRange ||
+                in->spawnVelocity != mDefaults.spawnVelocity ||
+                in->spawnVelocityRange != mDefaults.spawnVelocityRange)
+        {
+                mData[3] |= PART_SYS_BYTE_SPAWN_MASK;
+        }
+
+
+        if(in->windWeight != mDefaults.windWeight ||
+                in->currentGravity[0] != mDefaults.currentGravity[0] || 
+                in->currentGravity[1] != mDefaults.currentGravity[1] ||
+                in->currentGravity[2] != mDefaults.currentGravity[2] ||
+                in->gravityWeight != mDefaults.gravityWeight)
+        {
+                mData[3] |= PART_SYS_BYTE_ENVIRONMENT_MASK;
+        }
+
+        
+        if(in->globalLifetime != mDefaults.globalLifetime ||
+                in->individualLifetime != mDefaults.individualLifetime ||
+                in->individualLifetimeRange != mDefaults.individualLifetimeRange)
+        {
+                mData[3] |= PART_SYS_BYTE_LIFESPAN_MASK;
+        }
+
+        
+        if(in->speedLimit != mDefaults.speedLimit ||
+                in->alphaDecay != mDefaults.alphaDecay ||
+                in->scaleDecay != mDefaults.scaleDecay ||
+                in->dampMotionFactor != mDefaults.dampMotionFactor)
+        {
+                mData[3] |= PART_SYS_BYTE_DECAY_DAMP_MASK;
+        }
+
+        if(in->windDiffusionFactor[0] != mDefaults.windDiffusionFactor[0] || 
+                in->windDiffusionFactor[1] != mDefaults.windDiffusionFactor[1] ||
+                in->windDiffusionFactor[2] != mDefaults.windDiffusionFactor[2])
+        {
+                mData[3] |= PART_SYS_BYTE_WIND_DIFF_MASK;
+        }
+}
+
+F32 floatFromTwoBytes(S8 bMant, S8 bExp)
+{
+        F32 result = bMant;
+        while(bExp > 0) 
+        {
+                result *= 2.0f;
+                bExp--;
+        }
+        while(bExp < 0) 
+        {
+                result *= 0.5f;
+                bExp++;
+        }
+        return result;
+}
+
+void twoBytesFromFloat(F32 fIn, S8 &bMant, S8 &bExp)
+{
+        bExp = 0;
+        if(fIn > 127.0f)
+        {
+                fIn = 127.0f;
+        }
+        if(fIn < -127.0f)
+        {
+                fIn = -127.0f;
+        }
+        while(fIn < 64 && fIn > -64 && bExp > -127) 
+        {
+                fIn *= 2.0f;
+                bExp--;
+        }
+        while((fIn > 128 || fIn < -128) && bExp < 127)
+        {
+                fIn *= 0.5f;
+                bExp++;
+        }
+        bMant = (S8)fIn;
+}
+
+        
+
+/*
+U32 LLPartSysCompressedPacket::writeK(LLPartInitData *in, U32 startByte)
+{
+        U32 i, kFlag, i_mod_eight;
+        S8 bMant, bExp;
+
+        kFlag = startByte;
+
+        startByte += 3; // 3 bytes contain enough room for 18 flag bits
+        mData[kFlag] = 0x00;
+//      llprintline("In the writeK\n");
+
+        i_mod_eight = 0;
+        for(i = 0; i < 18; i++) 
+        {
+                if(in->k[i] != mDefaults.k[i]) 
+                {
+
+                        mData[kFlag] |= 1<<i_mod_eight;
+                        twoBytesFromFloat(in->k[i], bMant, bExp);
+
+                        mData[startByte++] = bMant;
+                        mData[startByte++] = bExp;
+                }
+                i_mod_eight++;
+                while(i_mod_eight >= 8) 
+                {
+                        kFlag++;
+                        i_mod_eight -= 8;
+                }
+        }
+        
+        return startByte;
+}*/
+
+U32 LLPartSysCompressedPacket::writeKill_p(LLPartInitData *in, U32 startByte)
+{
+        S8 bMant, bExp;
+
+        twoBytesFromFloat(in->killPlaneNormal[0], bMant, bExp);
+        mData[startByte++] = bMant;
+        mData[startByte++] = bExp;
+        twoBytesFromFloat(in->killPlaneNormal[1], bMant, bExp);
+        mData[startByte++] = bMant;
+        mData[startByte++] = bExp;
+        twoBytesFromFloat(in->killPlaneNormal[2], bMant, bExp);
+        mData[startByte++] = bMant;
+        mData[startByte++] = bExp;
+        
+        twoBytesFromFloat(in->killPlaneZ, bMant, bExp);
+        mData[startByte++] = bMant;
+        mData[startByte++] = bExp;
+        twoBytesFromFloat(in->distanceDeath, bMant, bExp);
+        mData[startByte++] = bMant;
+        mData[startByte++] = bExp;
+
+        return startByte;
+}
+
+U32 LLPartSysCompressedPacket::writeBounce_p(LLPartInitData *in, U32 startByte)
+{
+        S8 bMant, bExp;
+
+        twoBytesFromFloat(in->bouncePlaneNormal[0], bMant, bExp);
+        mData[startByte++] = bMant;
+        mData[startByte++] = bExp;
+        twoBytesFromFloat(in->bouncePlaneNormal[1], bMant, bExp);
+        mData[startByte++] = bMant;
+        mData[startByte++] = bExp;
+        twoBytesFromFloat(in->bouncePlaneNormal[2], bMant, bExp);
+        mData[startByte++] = bMant;
+        mData[startByte++] = bExp;
+        
+
+        twoBytesFromFloat(in->bouncePlaneZ, bMant, bExp);
+        mData[startByte++] = bMant;
+        mData[startByte++] = bExp;
+
+        return startByte;
+}
+
+U32 LLPartSysCompressedPacket::writeBounce_b(LLPartInitData *in, U32 startByte)
+{
+        S8 bMant, bExp;
+        twoBytesFromFloat(in->bounce_b, bMant, bExp);
+        mData[startByte++] = bMant;
+        mData[startByte++] = bExp;
+        return startByte;
+}
+
+//U32 LLPartSysCompressedPacket::writePos_ranges(LLPartInitData *in, U32 startByte)
+//{
+//      S8 tmp;
+//      int i;
+//      for(i = 0; i < 6; i++)
+//      {
+//              tmp = (S8) in->pos_ranges[i]; // float to int conversion (keep the sign)
+//              mData[startByte++] = (U8)tmp; // signed to unsigned typecast
+//      }
+//      return startByte;
+//}
+
+//U32 LLPartSysCompressedPacket::writeVel_ranges(LLPartInitData *in, U32 startByte)
+//{
+//      S8 tmp;
+//      int i;
+//      for(i = 0; i < 6; i++)
+//      {
+//              tmp = (S8) in->vel_ranges[i]; // float to int conversion (keep the sign)
+//              mData[startByte++] = (U8)tmp; // signed to unsigned typecast
+//      }
+//      return startByte;
+//}
+
+U32 LLPartSysCompressedPacket::writeAlphaScaleDiffEqn_range(LLPartInitData *in, U32 startByte)
+{
+        S8 bExp, bMant;
+        int i;
+        for(i = 0; i < 3; i++)
+        {
+                twoBytesFromFloat(in->diffEqAlpha[i], bMant, bExp);
+                mData[startByte++] = bMant;
+                mData[startByte++] = bExp;
+        }
+        for(i = 0; i < 3; i++)
+        {
+                twoBytesFromFloat(in->diffEqScale[i], bMant, bExp);
+                mData[startByte++] = bMant;
+                mData[startByte++] = bExp;
+        }
+        return startByte;
+}
+
+U32 LLPartSysCompressedPacket::writeScale_range(LLPartInitData *in, U32 startByte)
+{
+        S8 bExp, bMant;
+        int i;
+        for(i = 0; i < 4; i++)
+        {
+                twoBytesFromFloat(in->scale_range[i], bMant, bExp);
+                mData[startByte++] = bMant;
+                mData[startByte++] = bExp;
+        }
+        return startByte;
+}
+
+
+U32 LLPartSysCompressedPacket::writeAlpha_range(LLPartInitData *in, U32 startByte)
+{
+        S8 bExp, bMant;
+        int i;
+        for(i = 0; i < 4; i++)
+        {
+                twoBytesFromFloat(in->alpha_range[i], bMant, bExp);
+                mData[startByte++] = bMant;
+                mData[startByte++] = bExp;
+        }
+        return startByte;
+}
+
+U32 LLPartSysCompressedPacket::writeVelocityOffset(LLPartInitData *in, U32 startByte)
+{
+        S8 bExp, bMant;
+        int i;
+        for(i = 0; i < 3; i++)
+        {
+                twoBytesFromFloat(in->vel_offset[i], bMant, bExp);
+                mData[startByte++] = bMant;
+                mData[startByte++] = bExp;
+        }
+        return startByte;
+}
+
+U32 LLPartSysCompressedPacket::writeUUID(LLPartInitData *in, U32 startByte)
+{
+        U8 * bufPtr = mData + startByte;
+        if(in->mImageUuid == IMG_SHOT) {
+                mData[startByte++] = 0x01;
+                return startByte;
+        }
+
+        if(in->mImageUuid == IMG_SPARK) {
+                mData[startByte++] = 0x02;
+                return startByte;
+        }
+
+        
+        if(in->mImageUuid == IMG_BIG_EXPLOSION_1) {
+                mData[startByte++] = 0x03;
+                return startByte;
+        }
+
+        if(in->mImageUuid == IMG_BIG_EXPLOSION_2) {
+                mData[startByte++] = 0x04;
+                return startByte;
+        }
+
+
+        if(in->mImageUuid == IMG_SMOKE_POOF) {
+                mData[startByte++] = 0x05;
+                return startByte;
+        }
+
+        if(in->mImageUuid == IMG_FIRE) {
+                mData[startByte++] = 0x06;
+                return startByte;
+        }
+
+        
+        if(in->mImageUuid == IMG_EXPLOSION) {
+                mData[startByte++] = 0x07;
+                return startByte;
+        }
+
+        if(in->mImageUuid == IMG_EXPLOSION_2) {
+                mData[startByte++] = 0x08;
+                return startByte;
+        }
+
+        
+        if(in->mImageUuid == IMG_EXPLOSION_3) {
+                mData[startByte++] = 0x09;
+                return startByte;
+        }
+
+        if(in->mImageUuid == IMG_EXPLOSION_4) {
+                mData[startByte++] = 0x0A;
+                return startByte;
+        }
+
+        mData[startByte++] = 0x00; // flag for "read whole UUID"
+
+        memcpy(bufPtr, in->mImageUuid.mData, 16);               /* Flawfinder: ignore */
+        return (startByte+16);
+}
+
+U32 LLPartSysCompressedPacket::writeSpawn(LLPartInitData *in, U32 startByte)
+{
+        S8 bExp, bMant;
+        int i;
+
+        twoBytesFromFloat(in->spawnRange, bMant, bExp);
+        mData[startByte++] = bMant;
+        mData[startByte++] = bExp;
+        twoBytesFromFloat(in->spawnFrequency, bMant, bExp);
+        mData[startByte++] = bMant;
+        mData[startByte++] = bExp;
+        twoBytesFromFloat(in->spawnFreqencyRange, bMant, bExp);
+        mData[startByte++] = bMant;
+        mData[startByte++] = bExp;
+
+        
+        
+        for(i = 0; i < 3; i++)
+        {
+                twoBytesFromFloat(in->spawnDirection[i], bMant, bExp);
+                mData[startByte++] = bMant;
+                mData[startByte++] = bExp;
+        }
+
+        twoBytesFromFloat(in->spawnDirectionRange, bMant, bExp);
+        mData[startByte++] = bMant;
+        mData[startByte++] = bExp;
+        twoBytesFromFloat(in->spawnVelocity, bMant, bExp);
+        mData[startByte++] = bMant;
+        mData[startByte++] = bExp;
+        twoBytesFromFloat(in->spawnVelocityRange, bMant, bExp);
+        mData[startByte++] = bMant;
+        mData[startByte++] = bExp;
+
+        return startByte;
+}
+
+U32 LLPartSysCompressedPacket::writeEnvironment(LLPartInitData *in, U32 startByte)
+{
+        S8 bExp, bMant;
+        int i;
+
+        twoBytesFromFloat(in->windWeight, bMant, bExp);
+        mData[startByte++] = bMant;
+        mData[startByte++] = bExp;
+
+        for(i = 0; i < 3; i++)
+        {
+                twoBytesFromFloat(in->currentGravity[i], bMant, bExp);
+                mData[startByte++] = bMant;
+                mData[startByte++] = bExp;
+        }
+
+        twoBytesFromFloat(in->gravityWeight, bMant, bExp);
+        mData[startByte++] = bMant;
+        mData[startByte++] = bExp;
+        return startByte;
+}       
+        
+U32 LLPartSysCompressedPacket::writeLifespan(LLPartInitData *in, U32 startByte)
+{
+        S8 bExp, bMant;
+
+        twoBytesFromFloat(in->globalLifetime, bMant, bExp);
+        mData[startByte++] = bMant;
+        mData[startByte++] = bExp;
+
+        twoBytesFromFloat(in->individualLifetime, bMant, bExp);
+        mData[startByte++] = bMant;
+        mData[startByte++] = bExp;
+
+        twoBytesFromFloat(in->individualLifetimeRange, bMant, bExp);
+        mData[startByte++] = bMant;
+        mData[startByte++] = bExp;
+
+        return startByte;
+}
+        
+
+U32 LLPartSysCompressedPacket::writeDecayDamp(LLPartInitData *in, U32 startByte)
+{
+        S8 bExp, bMant;
+
+        twoBytesFromFloat(in->speedLimit, bMant, bExp);
+        mData[startByte++] = bMant;
+        mData[startByte++] = bExp;
+
+        twoBytesFromFloat(in->alphaDecay, bMant, bExp);
+        mData[startByte++] = bMant;
+        mData[startByte++] = bExp;
+
+        twoBytesFromFloat(in->scaleDecay, bMant, bExp);
+        mData[startByte++] = bMant;
+        mData[startByte++] = bExp;
+
+        twoBytesFromFloat(in->dampMotionFactor, bMant, bExp);
+        mData[startByte++] = bMant;
+        mData[startByte++] = bExp;
+
+        return startByte;
+}
+
+U32 LLPartSysCompressedPacket::writeWindDiffusionFactor(LLPartInitData *in, U32 startByte)
+{
+        S8 bExp, bMant;
+
+        twoBytesFromFloat(in->windDiffusionFactor[0], bMant, bExp);
+        mData[startByte++] = bMant;
+        mData[startByte++] = bExp;
+
+        twoBytesFromFloat(in->windDiffusionFactor[1], bMant, bExp);
+        mData[startByte++] = bMant;
+        mData[startByte++] = bExp;
+
+        twoBytesFromFloat(in->windDiffusionFactor[2], bMant, bExp);
+        mData[startByte++] = bMant;
+        mData[startByte++] = bExp;
+
+        return startByte;
+}
+
+
+
+
+
+        
+/*
+U32 LLPartSysCompressedPacket::readK(LLPartInitData *in, U32 startByte)
+{
+        U32 i, i_mod_eight, kFlag;
+        S8 bMant, bExp; // 1 bytes mantissa and exponent for a float
+        kFlag = startByte;
+        startByte += 3; // 3 bytes has enough room for 18 bits
+
+        i_mod_eight = 0;
+        for(i = 0; i < 18; i++) 
+        {
+                if(mData[kFlag]&(1<<i_mod_eight))  
+                {
+
+                        
+                
+                        bMant = mData[startByte++];
+                        bExp = mData[startByte++];
+                
+                        
+                        in->k[i] = floatFromTwoBytes(bMant, bExp); // much tighter platform-independent
+                        //                                            way to ship floats
+
+                }
+                i_mod_eight++;
+                if(i_mod_eight >= 8)
+                {
+                        i_mod_eight -= 8;
+                        kFlag++;
+                }
+        }
+        
+        return startByte;
+}
+*/
+
+U32 LLPartSysCompressedPacket::readKill_p(LLPartInitData *in, U32 startByte)
+{
+        S8 bMant, bExp;
+
+        bMant = mData[startByte++];
+        bExp = mData[startByte++];
+        in->killPlaneNormal[0] = floatFromTwoBytes(bMant, bExp);
+        bMant = mData[startByte++];
+        bExp = mData[startByte++];
+        in->killPlaneNormal[1] = floatFromTwoBytes(bMant, bExp);
+        bMant = mData[startByte++];
+        bExp = mData[startByte++];
+        in->killPlaneNormal[2] = floatFromTwoBytes(bMant, bExp);
+
+        bMant = mData[startByte++];
+        bExp = mData[startByte++];
+        in->killPlaneZ = floatFromTwoBytes(bMant, bExp);
+        bMant = mData[startByte++];
+        bExp = mData[startByte++];
+        in->distanceDeath = floatFromTwoBytes(bMant, bExp);
+
+        return startByte;
+}
+
+U32 LLPartSysCompressedPacket::readBounce_p(LLPartInitData *in, U32 startByte)
+{
+
+        S8 bMant, bExp;
+
+        bMant = mData[startByte++];
+        bExp = mData[startByte++];
+        in->bouncePlaneNormal[0] = floatFromTwoBytes(bMant, bExp);
+        bMant = mData[startByte++];
+        bExp = mData[startByte++];
+        in->bouncePlaneNormal[1] = floatFromTwoBytes(bMant, bExp);
+        bMant = mData[startByte++];
+        bExp = mData[startByte++];
+        in->bouncePlaneNormal[2] = floatFromTwoBytes(bMant, bExp);
+
+        bMant = mData[startByte++];
+        bExp = mData[startByte++];
+        in->bouncePlaneZ = floatFromTwoBytes(bMant, bExp);
+
+        return startByte;
+}
+
+U32 LLPartSysCompressedPacket::readBounce_b(LLPartInitData *in, U32 startByte)
+{
+        S8 bMant, bExp;
+        bMant = mData[startByte++];
+        bExp = mData[startByte++];
+        in->bounce_b = floatFromTwoBytes(bMant, bExp);
+        return startByte;
+}
+
+
+//U32 LLPartSysCompressedPacket::readPos_ranges(LLPartInitData *in, U32 startByte)
+//{
+//      S8 tmp;
+//      int i;
+//      for(i = 0; i < 6; i++)
+//      {
+//              tmp = (S8)mData[startByte++];
+//              in->pos_ranges[i] = tmp;
+//      }
+//      return startByte;
+//}
+
+//U32 LLPartSysCompressedPacket::readVel_ranges(LLPartInitData *in, U32 startByte)
+//{
+//      S8 tmp;
+//      int i;
+//      for(i = 0; i < 6; i++)
+//      {
+//              tmp = (S8)mData[startByte++];
+//              in->vel_ranges[i] = tmp;
+//      }
+//      return startByte;
+//}
+
+
+
+U32 LLPartSysCompressedPacket::readAlphaScaleDiffEqn_range(LLPartInitData *in, U32 startByte)
+{
+        int i;
+        S8 bMant, bExp;
+        for(i = 0; i < 3; i++)
+        {
+                bMant = mData[startByte++];
+                bExp = mData[startByte++];
+                in->diffEqAlpha[i] = floatFromTwoBytes(bMant, bExp);
+        }
+        for(i = 0; i < 3; i++)
+        {
+                bMant = mData[startByte++];
+                bExp = mData[startByte++];
+                in->diffEqScale[i] = floatFromTwoBytes(bMant, bExp);
+        }
+        return startByte;
+}
+
+U32 LLPartSysCompressedPacket::readAlpha_range(LLPartInitData *in, U32 startByte)
+{
+        int i;
+        S8 bMant, bExp;
+        for(i = 0; i < 4; i++)
+        {
+                bMant = mData[startByte++];
+                bExp = mData[startByte++];
+                in->alpha_range[i] = floatFromTwoBytes(bMant, bExp);
+        }
+        return startByte;
+}
+
+U32 LLPartSysCompressedPacket::readScale_range(LLPartInitData *in, U32 startByte)
+{
+        int i;
+        S8 bMant, bExp;
+        for(i = 0; i < 4; i++)
+        {
+                bMant = mData[startByte++];
+                bExp = mData[startByte++];
+                in->scale_range[i] = floatFromTwoBytes(bMant, bExp);
+        }
+        return startByte;
+}
+
+U32 LLPartSysCompressedPacket::readVelocityOffset(LLPartInitData *in, U32 startByte)
+{
+        int i;
+        S8 bMant, bExp;
+        for(i = 0; i < 3; i++)
+        {
+                bMant = mData[startByte++];
+                bExp = mData[startByte++];
+                in->vel_offset[i] = floatFromTwoBytes(bMant, bExp);
+        }
+        return startByte;
+}
+
+U32 LLPartSysCompressedPacket::readUUID(LLPartInitData *in, U32 startByte)
+{
+        U8 * bufPtr = mData + startByte;
+        
+        if(mData[startByte] == 0x01)
+        {
+                in->mImageUuid = IMG_SHOT;
+                return startByte+1;
+        }
+        if(mData[startByte] == 0x02)
+        {
+                in->mImageUuid = IMG_SPARK;
+                return startByte+1;
+        }
+        if(mData[startByte] == 0x03)
+        {
+                in->mImageUuid = IMG_BIG_EXPLOSION_1;
+                return startByte+1;
+        }
+        if(mData[startByte] == 0x04)
+        {
+                in->mImageUuid = IMG_BIG_EXPLOSION_2;
+                return startByte+1;
+        }
+        if(mData[startByte] == 0x05)
+        {
+                in->mImageUuid = IMG_SMOKE_POOF;
+                return startByte+1;
+        }
+        if(mData[startByte] == 0x06)
+        {
+                in->mImageUuid = IMG_FIRE;
+                return startByte+1;
+        }
+        if(mData[startByte] == 0x07)
+        {
+                in->mImageUuid = IMG_EXPLOSION;
+                return startByte+1;
+        }
+        if(mData[startByte] == 0x08)
+        {
+                in->mImageUuid = IMG_EXPLOSION_2;
+                return startByte+1;
+        }
+        if(mData[startByte] == 0x09)
+        {
+                in->mImageUuid = IMG_EXPLOSION_3;
+                return startByte+1;
+        }
+        if(mData[startByte] == 0x0A)
+        {
+                in->mImageUuid = IMG_EXPLOSION_4;
+                return startByte+1;
+        }
+
+        startByte++; // cause we actually have to read the UUID now.
+        memcpy(in->mImageUuid.mData, bufPtr, 16);               /* Flawfinder: ignore */
+        return (startByte+16);
+}
+
+
+
+
+U32 LLPartSysCompressedPacket::readSpawn(LLPartInitData *in, U32 startByte)
+{
+        S8 bMant, bExp;
+        U32     i;
+
+        bMant = mData[startByte++];
+        bExp = mData[startByte++];
+        in->spawnRange = floatFromTwoBytes(bMant, bExp);
+        bMant = mData[startByte++];
+        bExp = mData[startByte++];
+        in->spawnFrequency = floatFromTwoBytes(bMant, bExp);
+        bMant = mData[startByte++];
+        bExp = mData[startByte++];
+        in->spawnFreqencyRange = floatFromTwoBytes(bMant, bExp);
+
+        for(i = 0; i < 3; i++)
+        {
+                bMant = mData[startByte++];
+                bExp = mData[startByte++];
+                in->spawnDirection[i] = floatFromTwoBytes(bMant, bExp);
+        }
+
+        bMant = mData[startByte++];
+        bExp = mData[startByte++];
+        in->spawnDirectionRange = floatFromTwoBytes(bMant, bExp);
+        bMant = mData[startByte++];
+        bExp = mData[startByte++];
+        in->spawnVelocity = floatFromTwoBytes(bMant, bExp);
+        bMant = mData[startByte++];
+        bExp = mData[startByte++];
+        in->spawnVelocityRange = floatFromTwoBytes(bMant, bExp);
+
+        return startByte;
+}
+
+U32 LLPartSysCompressedPacket::readEnvironment(LLPartInitData *in, U32 startByte)
+{
+        S8 bMant, bExp;
+        U32     i;
+
+
+        bMant = mData[startByte++];
+        bExp = mData[startByte++];
+        in->windWeight = floatFromTwoBytes(bMant, bExp);
+
+        for(i = 0; i < 3; i++)
+        {
+                bMant = mData[startByte++];
+                bExp = mData[startByte++];
+                in->currentGravity[i] = floatFromTwoBytes(bMant, bExp);
+        }
+
+        bMant = mData[startByte++];
+        bExp = mData[startByte++];
+        in->gravityWeight = floatFromTwoBytes(bMant, bExp);
+
+        return startByte;
+}
+
+U32 LLPartSysCompressedPacket::readLifespan(LLPartInitData *in, U32 startByte)
+{
+        S8 bMant, bExp;
+
+        bMant = mData[startByte++];
+        bExp = mData[startByte++];
+        in->globalLifetime = floatFromTwoBytes(bMant, bExp);
+        bMant = mData[startByte++];
+        bExp = mData[startByte++];
+        in->individualLifetime = floatFromTwoBytes(bMant, bExp);
+        bMant = mData[startByte++];
+        bExp = mData[startByte++];
+        in->individualLifetimeRange = floatFromTwoBytes(bMant, bExp);
+
+        return startByte;
+}
+
+U32 LLPartSysCompressedPacket::readDecayDamp(LLPartInitData *in, U32 startByte)
+{
+        S8 bMant, bExp;
+
+        bMant = mData[startByte++];
+        bExp = mData[startByte++];
+        in->speedLimit = floatFromTwoBytes(bMant, bExp);
+        bMant = mData[startByte++];
+        bExp = mData[startByte++];
+        in->alphaDecay = floatFromTwoBytes(bMant, bExp);
+        bMant = mData[startByte++];
+        bExp = mData[startByte++];
+        in->scaleDecay = floatFromTwoBytes(bMant, bExp);
+        bMant = mData[startByte++];
+        bExp = mData[startByte++];
+        in->dampMotionFactor = floatFromTwoBytes(bMant, bExp);
+
+        return startByte;
+}
+
+U32 LLPartSysCompressedPacket::readWindDiffusionFactor(LLPartInitData *in, U32 startByte)
+{
+        int i;
+        S8 bMant, bExp;
+        for(i = 0; i < 3; i++)
+        {
+                bMant = mData[startByte++];
+                bExp = mData[startByte++];
+                in->windDiffusionFactor[i] = floatFromTwoBytes(bMant, bExp);
+        }
+        return startByte;
+}
+
+BOOL LLPartSysCompressedPacket::fromLLPartInitData(LLPartInitData *in, U32 &bytesUsed)
+{
+
+        writeFlagByte(in);
+        U32 currByte = 4;
+        
+//      llprintline("calling \"fromLLPartInitData\"\n");
+
+        //if(mData[0] & PART_SYS_K_MASK)
+        //{
+        //      currByte = writeK(in, 3); // first 3 bytes are reserved for header data
+        //}
+        
+
+
+        if(mData[0] & PART_SYS_KILL_P_MASK)
+        {
+                currByte = writeKill_p(in, currByte);
+        }
+        
+        if(mData[0] & PART_SYS_BOUNCE_P_MASK)
+        {
+                currByte = writeBounce_p(in, currByte);
+        }
+        
+        if(mData[0] & PART_SYS_BOUNCE_B_MASK)
+        {
+                currByte = writeBounce_b(in, currByte);
+        }
+        
+        //if(mData[0] & PART_SYS_POS_RANGES_MASK)
+        //{
+        //      currByte = writePos_ranges(in, currByte);
+        //}
+        
+        //if(mData[0] & PART_SYS_VEL_RANGES_MASK)
+        //{
+        //      currByte = writeVel_ranges(in, currByte);
+        //}
+
+        if(mData[0] & PART_SYS_ALPHA_SCALE_DIFF_MASK)
+        {
+                currByte = writeAlphaScaleDiffEqn_range(in, currByte);
+        }
+        
+        if(mData[0] & PART_SYS_SCALE_RANGE_MASK)
+        {
+                currByte = writeScale_range(in, currByte);
+        }
+        
+        if(mData[0] & PART_SYS_VEL_OFFSET_MASK)
+        {
+                currByte = writeVelocityOffset(in, currByte);
+        }
+
+        if(mData[0] & PART_SYS_M_IMAGE_UUID_MASK)
+        {
+                currByte = writeUUID(in, currByte);
+        }
+        
+
+        if(mData[3] & PART_SYS_BYTE_SPAWN_MASK)
+        {
+                currByte = writeSpawn(in, currByte);
+        }
+        
+        if(mData[3] & PART_SYS_BYTE_ENVIRONMENT_MASK)
+        {
+                currByte = writeEnvironment(in, currByte);
+        }
+        
+        if(mData[3] & PART_SYS_BYTE_LIFESPAN_MASK)
+        {
+                currByte = writeLifespan(in, currByte);
+        }
+        
+        if(mData[3] & PART_SYS_BYTE_DECAY_DAMP_MASK)
+        {
+                currByte = writeDecayDamp(in, currByte);
+        }
+        
+        if(mData[3] & PART_SYS_BYTE_WIND_DIFF_MASK)
+        {
+                currByte = writeWindDiffusionFactor(in, currByte);
+        }
+        
+
+        if(mData[2] & PART_SYS_BYTE_3_ALPHA_MASK)
+        {
+                currByte = writeAlpha_range(in, currByte);
+        }
+
+        mData[currByte++] = (U8)in->maxParticles;
+        mData[currByte++] = (U8)in->initialParticles;
+
+
+        U32 flagFlag = 1; // flag indicating which flag bytes are non-zero
+        //                   yeah, I know, the name sounds funny
+        for(U32 i = 0; i < 8; i++)
+        {
+        
+//              llprintline("Flag \"%x\" gets byte \"%x\"\n", flagFlag, in->mFlags[i]);
+                if(mData[1] & flagFlag)
+                {
+                        mData[currByte++] = in->mFlags[i];
+//                      llprintline("and is valid...\n");
+                }
+                flagFlag <<= 1;
+        }
+
+        bytesUsed = mNumBytes = currByte;
+        
+        
+        
+//      llprintline("returning from \"fromLLPartInitData\" with %d bytes\n", bytesUsed);
+        
+        return TRUE;
+}
+
+BOOL LLPartSysCompressedPacket::toLLPartInitData(LLPartInitData *out, U32 *bytesUsed)
+{
+        U32 currByte = 4;
+
+        gSetInitDataDefaults(out);
+
+        if(mData[0] & PART_SYS_KILL_P_MASK)
+        {
+                currByte = readKill_p(out, currByte);
+        }
+        
+        if(mData[0] & PART_SYS_BOUNCE_P_MASK)
+        {
+                currByte = readBounce_p(out, currByte);
+        }
+        
+        if(mData[0] & PART_SYS_BOUNCE_B_MASK)
+        {
+                currByte = readBounce_b(out, currByte);
+        }
+        
+        if(mData[0] & PART_SYS_ALPHA_SCALE_DIFF_MASK)
+        {
+                currByte = readAlphaScaleDiffEqn_range(out, currByte);
+        }
+        
+        if(mData[0] & PART_SYS_SCALE_RANGE_MASK)
+        {
+                currByte = readScale_range(out, currByte);
+        }
+        
+        if(mData[0] & PART_SYS_VEL_OFFSET_MASK)
+        {
+                currByte = readVelocityOffset(out, currByte);
+        }
+        
+        if(mData[0] & PART_SYS_M_IMAGE_UUID_MASK)
+        {
+                currByte = readUUID(out, currByte);
+        }
+        
+
+        if(mData[3] & PART_SYS_BYTE_SPAWN_MASK)
+        {
+                currByte = readSpawn(out, currByte);
+        }
+        
+        if(mData[3] & PART_SYS_BYTE_ENVIRONMENT_MASK)
+        {
+                currByte = readEnvironment(out, currByte);
+        }
+        
+        if(mData[3] & PART_SYS_BYTE_LIFESPAN_MASK)
+        {
+                currByte = readLifespan(out, currByte);
+        }
+        
+        if(mData[3] & PART_SYS_BYTE_DECAY_DAMP_MASK)
+        {
+                currByte = readDecayDamp(out, currByte);
+        }
+        
+        if(mData[3] & PART_SYS_BYTE_WIND_DIFF_MASK)
+        {
+                currByte = readWindDiffusionFactor(out, currByte);
+        }
+        
+        if(mData[2] & PART_SYS_BYTE_3_ALPHA_MASK)
+        {
+                currByte = readAlpha_range(out, currByte);
+        }
+
+        out->maxParticles = mData[currByte++];
+        out->initialParticles = mData[currByte++];
+
+        U32 flagFlag = 1; // flag indicating which flag bytes are non-zero
+        //                   yeah, I know, the name sounds funny
+        for(U32 i = 0; i < 8; i++)
+        {
+                flagFlag = 1<<i;
+        
+                if((mData[1] & flagFlag))
+                {
+                        out->mFlags[i] = mData[currByte++];
+                }
+        }
+
+        *bytesUsed = currByte;
+        return TRUE;
+}
+
+BOOL LLPartSysCompressedPacket::fromUnsignedBytes(U8 *in, U32 bytesUsed)
+{
+        if ((in != NULL) && (bytesUsed <= sizeof(mData)))
+        {
+                memcpy(mData, in, bytesUsed);
+                mNumBytes = bytesUsed;
+                return TRUE;
+        }
+        else
+        {
+                llerrs << "NULL input data or number of bytes exceed mData size" << llendl;
+                return FALSE;
+        }
+}               
+        
+
+U32 LLPartSysCompressedPacket::bufferSize()
+{
+        return mNumBytes;
+}
+
+BOOL LLPartSysCompressedPacket::toUnsignedBytes(U8 *out)
+{
+        memcpy(out, mData, mNumBytes);          /* Flawfinder: ignore */
+        return TRUE;
+}
+
+U8 * LLPartSysCompressedPacket::getBytePtr()
+{
+        return mData;
+}
+
+