/** * @file llviewerpartsource.cpp * @brief LLViewerPartSource class implementation * * $LicenseInfo:firstyear=2003&license=viewerlgpl$ * 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 * $/LicenseInfo$ */ #include "llviewerprecompiledheaders.h" #include "llviewerpartsource.h" #include "llviewercontrol.h" #include "llrender.h" #include "llagent.h" #include "lldrawable.h" #include "llviewercamera.h" #include "llviewertexturelist.h" #include "llviewerobject.h" #include "llviewerobjectlist.h" #include "llvoavatar.h" #include "llworld.h" #include "pipeline.h" static LLVOAvatar* find_avatar(const LLUUID& id) { LLViewerObject *obj = gObjectList.findObject(id); while (obj && obj->isAttachment()) { obj = (LLViewerObject *)obj->getParent(); } if (obj && obj->isAvatar()) { return (LLVOAvatar*)obj; } else { return NULL; } } LLViewerPartSource::LLViewerPartSource(const U32 type) : mType(type), mOwnerUUID(LLUUID::null), mPartFlags(0) { mLastUpdateTime = 0.f; mLastPartTime = 0.f; mIsDead = FALSE; mIsSuspended = FALSE; static U32 id_seed = 0; mID = ++id_seed; mLastPart = NULL; mDelay = 0 ; } void LLViewerPartSource::setDead() { mIsDead = TRUE; } void LLViewerPartSource::updatePart(LLViewerPart &part, const F32 dt) { } void LLViewerPartSource::update(const F32 dt) { LL_ERRS() << "Creating default part source!" << LL_ENDL; } LLUUID LLViewerPartSource::getImageUUID() const { LLViewerTexture* imagep = mImagep; if(imagep) { return imagep->getID(); } return LLUUID::null; } void LLViewerPartSource::setStart() { //cancel delaying to start a new added particle source, because some particle source just emits for a short time. //however, canceling this might cause overall particle emmitting fluctuate for a while because the new added source jumps to //the current particle emmitting settings instantly. -->bao mDelay = 0 ; //99 } LLViewerPartSourceScript::LLViewerPartSourceScript(LLViewerObject *source_objp) : LLViewerPartSource(LL_PART_SOURCE_SCRIPT) { llassert(source_objp); mSourceObjectp = source_objp; mPosAgent = mSourceObjectp->getPositionAgent(); mImagep = LLViewerTextureManager::getFetchedTextureFromFile("pixiesmall.j2c"); mImagep->setAddressMode(LLTexUnit::TAM_CLAMP); } void LLViewerPartSourceScript::setDead() { mIsDead = TRUE; mSourceObjectp = NULL; mTargetObjectp = NULL; } void LLViewerPartSourceScript::update(const F32 dt) { if( mIsSuspended ) return; if (mOwnerAvatarp.isNull() && mOwnerUUID != LLUUID::null) { mOwnerAvatarp = find_avatar(mOwnerUUID); } if (mOwnerAvatarp.notNull() && LLVOAvatar::AOA_NORMAL != mOwnerAvatarp->getOverallAppearance()) { return; } F32 old_update_time = mLastUpdateTime; mLastUpdateTime += dt; F32 ref_rate_travelspeed = llmin(LLViewerPartSim::getInstance()->getRefRate(), 1.f); F32 dt_update = mLastUpdateTime - mLastPartTime; // Update this for objects which have the follow flag set... if (!mSourceObjectp.isNull()) { if (mSourceObjectp->isDead()) { mSourceObjectp = NULL; } else if (mSourceObjectp->mDrawable.notNull()) { mPosAgent = mSourceObjectp->getRenderPosition(); } } if (mTargetObjectp.isNull() && mPartSysData.mTargetUUID.notNull()) { // // Hmm, missing object, let's see if we can find it... // LLViewerObject *target_objp = gObjectList.findObject(mPartSysData.mTargetUUID); setTargetObject(target_objp); } if (!mTargetObjectp.isNull()) { if (mTargetObjectp->isDead()) { mTargetObjectp = NULL; } else if (mTargetObjectp->mDrawable.notNull()) { mTargetPosAgent = mTargetObjectp->getRenderPosition(); } } if (!mTargetObjectp) { mTargetPosAgent = mPosAgent; } if (mPartSysData.mMaxAge && ((mPartSysData.mStartAge + mLastUpdateTime + dt_update) > mPartSysData.mMaxAge)) { // Kill particle source because it has outlived its max age... setDead(); return; } if (gPipeline.hasRenderDebugMask(LLPipeline::RENDER_DEBUG_PARTICLES)) { if (mSourceObjectp.notNull()) { std::ostringstream ostr; ostr << mPartSysData; mSourceObjectp->setDebugText(ostr.str()); } } BOOL first_run = FALSE; if (old_update_time <= 0.f) { first_run = TRUE; } F32 max_time = llmax(1.f, 10.f*mPartSysData.mBurstRate); dt_update = llmin(max_time, dt_update); while ((dt_update > mPartSysData.mBurstRate) || first_run) { first_run = FALSE; // Update the rotation of the particle source by the angular velocity // First check to see if there is still an angular velocity. F32 angular_velocity_mag = mPartSysData.mAngularVelocity.magVec(); if (angular_velocity_mag != 0.0f) { F32 av_angle = dt * angular_velocity_mag; LLQuaternion dquat(av_angle, mPartSysData.mAngularVelocity); mRotation *= dquat; } else { // No angular velocity. Reset our rotation. mRotation.setQuat(0, 0, 0); } if (LLViewerPartSim::getInstance()->aboveParticleLimit()) { // Don't bother doing any more updates if we're above the particle limit, // just give up. mLastPartTime = mLastUpdateTime; break; } // find the greatest length that the shortest side of a system // particle is expected to have F32 max_short_side = llmax( llmax(llmin(mPartSysData.mPartData.mStartScale[0], mPartSysData.mPartData.mStartScale[1]), llmin(mPartSysData.mPartData.mEndScale[0], mPartSysData.mPartData.mEndScale[1])), llmin((mPartSysData.mPartData.mStartScale[0] + mPartSysData.mPartData.mEndScale[0])/2, (mPartSysData.mPartData.mStartScale[1] + mPartSysData.mPartData.mEndScale[1])/2)); F32 pixel_meter_ratio = LLViewerCamera::getInstance()->getPixelMeterRatio(); // Maximum distance at which spawned particles will be viewable F32 max_dist = max_short_side * pixel_meter_ratio; if (max_dist < 0.25f) { // < 1 pixel wide at a distance of >=25cm. Particles // this tiny are useless and mostly spawned by buggy // sources mLastPartTime = mLastUpdateTime; break; } // Distance from camera F32 dist = (mPosAgent - LLViewerCamera::getInstance()->getOrigin()).magVec(); // Particle size vs distance vs maxage throttling F32 limited_rate=0.f; if (dist - max_dist > 0.f) { if((dist - max_dist) * ref_rate_travelspeed > mPartSysData.mPartData.mMaxAge - 0.2f ) { // You need to travel faster than 1 divided by reference rate m/s directly towards these particles to see them at least 0.2s mLastPartTime = mLastUpdateTime; break; } limited_rate = ((dist - max_dist) * ref_rate_travelspeed) / mPartSysData.mPartData.mMaxAge; } if(mDelay) { limited_rate = llmax(limited_rate, 0.01f * mDelay--) ; } S32 i; for (i = 0; i < mPartSysData.mBurstPartCount; i++) { if (ll_frand() < llmax(1.0f - LLViewerPartSim::getInstance()->getBurstRate(), limited_rate)) { // Limit particle generation continue; } LLViewerPart* part = new LLViewerPart(); part->init(this, mImagep, NULL); part->mFlags = mPartSysData.mPartData.mFlags; if (!mSourceObjectp.isNull() && mSourceObjectp->isHUDAttachment()) { part->mFlags |= LLPartData::LL_PART_HUD; } if (part->mFlags & LLPartData::LL_PART_RIBBON_MASK && mLastPart) { //set previous particle's parent to this particle to chain ribbon together mLastPart->mParent = part; part->mChild = mLastPart; part->mAxis = LLVector3(0,0,1); if (mSourceObjectp.notNull()) { LLQuaternion rot = mSourceObjectp->getRenderRotation(); part->mAxis *= rot; } } mLastPart = part; part->mMaxAge = mPartSysData.mPartData.mMaxAge; part->mStartColor = mPartSysData.mPartData.mStartColor; part->mEndColor = mPartSysData.mPartData.mEndColor; part->mColor = part->mStartColor; part->mStartScale = mPartSysData.mPartData.mStartScale; part->mEndScale = mPartSysData.mPartData.mEndScale; part->mScale = part->mStartScale; part->mAccel = mPartSysData.mPartAccel; part->mBlendFuncDest = mPartSysData.mPartData.mBlendFuncDest; part->mBlendFuncSource = mPartSysData.mPartData.mBlendFuncSource; part->mStartGlow = mPartSysData.mPartData.mStartGlow; part->mEndGlow = mPartSysData.mPartData.mEndGlow; part->mGlow = LLColor4U(0, 0, 0, (U8) ll_round(part->mStartGlow*255.f)); if (mPartSysData.mPattern & LLPartSysData::LL_PART_SRC_PATTERN_DROP) { part->mPosAgent = mPosAgent; part->mVelocity.setVec(0.f, 0.f, 0.f); } else if (mPartSysData.mPattern & LLPartSysData::LL_PART_SRC_PATTERN_EXPLODE) { part->mPosAgent = mPosAgent; LLVector3 part_dir_vector; F32 mvs; do { part_dir_vector.mV[VX] = ll_frand(2.f) - 1.f; part_dir_vector.mV[VY] = ll_frand(2.f) - 1.f; part_dir_vector.mV[VZ] = ll_frand(2.f) - 1.f; mvs = part_dir_vector.magVecSquared(); } while ((mvs > 1.f) || (mvs < 0.01f)); part_dir_vector.normVec(); part->mPosAgent += mPartSysData.mBurstRadius*part_dir_vector; part->mVelocity = part_dir_vector; F32 speed = mPartSysData.mBurstSpeedMin + ll_frand(mPartSysData.mBurstSpeedMax - mPartSysData.mBurstSpeedMin); part->mVelocity *= speed; } else if (mPartSysData.mPattern & LLPartSysData::LL_PART_SRC_PATTERN_ANGLE || mPartSysData.mPattern & LLPartSysData::LL_PART_SRC_PATTERN_ANGLE_CONE) { part->mPosAgent = mPosAgent; // original implemenetation for part_dir_vector was just: LLVector3 part_dir_vector(0.0, 0.0, 1.0); // params from the script... // outer = outer cone angle // inner = inner cone angle // between outer and inner there will be particles F32 innerAngle = mPartSysData.mInnerAngle; F32 outerAngle = mPartSysData.mOuterAngle; // generate a random angle within the given space... F32 angle = innerAngle + ll_frand(outerAngle - innerAngle); // split which side it will go on randomly... if (ll_frand() < 0.5) { angle = -angle; } // Both patterns rotate around the x-axis first: part_dir_vector.rotVec(angle, 1.0, 0.0, 0.0); // If this is a cone pattern, rotate again to create the cone. if (mPartSysData.mPattern & LLPartSysData::LL_PART_SRC_PATTERN_ANGLE_CONE) { part_dir_vector.rotVec(ll_frand(4*F_PI), 0.0, 0.0, 1.0); } // Only apply this rotation if using the deprecated angles. if (! (mPartSysData.mFlags & LLPartSysData::LL_PART_USE_NEW_ANGLE)) { // Deprecated... part_dir_vector.rotVec(outerAngle, 1.0, 0.0, 0.0); } if (mSourceObjectp) { part_dir_vector = part_dir_vector * mSourceObjectp->getRenderRotation(); } part_dir_vector = part_dir_vector * mRotation; part->mPosAgent += mPartSysData.mBurstRadius*part_dir_vector; part->mVelocity = part_dir_vector; F32 speed = mPartSysData.mBurstSpeedMin + ll_frand(mPartSysData.mBurstSpeedMax - mPartSysData.mBurstSpeedMin); part->mVelocity *= speed; } else { part->mPosAgent = mPosAgent; part->mVelocity.setVec(0.f, 0.f, 0.f); //LL_WARNS() << "Unknown source pattern " << (S32)mPartSysData.mPattern << LL_ENDL; } if (part->mFlags & LLPartData::LL_PART_FOLLOW_SRC_MASK || // SVC-193, VWR-717 part->mFlags & LLPartData::LL_PART_TARGET_LINEAR_MASK) { mPartSysData.mBurstRadius = 0; } LLViewerPartSim::getInstance()->addPart(part); } mLastPartTime = mLastUpdateTime; dt_update -= mPartSysData.mBurstRate; } } // static LLPointer<LLViewerPartSourceScript> LLViewerPartSourceScript::unpackPSS(LLViewerObject *source_objp, LLPointer<LLViewerPartSourceScript> pssp, const S32 block_num) { if (!pssp) { if (LLPartSysData::isNullPS(block_num)) { return NULL; } LLPointer<LLViewerPartSourceScript> new_pssp = new LLViewerPartSourceScript(source_objp); if (!new_pssp->mPartSysData.unpackBlock(block_num)) { return NULL; } if (new_pssp->mPartSysData.mTargetUUID.notNull()) { LLViewerObject *target_objp = gObjectList.findObject(new_pssp->mPartSysData.mTargetUUID); new_pssp->setTargetObject(target_objp); } return new_pssp; } else { if (LLPartSysData::isNullPS(block_num)) { return NULL; } F32 prev_max_age = pssp->mPartSysData.mMaxAge; F32 prev_start_age = pssp->mPartSysData.mStartAge; if (!pssp->mPartSysData.unpackBlock(block_num)) { return NULL; } else if (pssp->mPartSysData.mMaxAge && (prev_max_age != pssp->mPartSysData.mMaxAge || prev_start_age != pssp->mPartSysData.mStartAge)) { // reusing existing pss, so reset time to allow particles to start again pssp->mLastUpdateTime = 0.f; pssp->mLastPartTime = 0.f; } if (pssp->mPartSysData.mTargetUUID.notNull()) { LLViewerObject *target_objp = gObjectList.findObject(pssp->mPartSysData.mTargetUUID); pssp->setTargetObject(target_objp); } return pssp; } } LLPointer<LLViewerPartSourceScript> LLViewerPartSourceScript::unpackPSS(LLViewerObject *source_objp, LLPointer<LLViewerPartSourceScript> pssp, LLDataPacker &dp, bool legacy) { if (!pssp) { LLPointer<LLViewerPartSourceScript> new_pssp = new LLViewerPartSourceScript(source_objp); if (legacy) { if (!new_pssp->mPartSysData.unpackLegacy(dp)) { return NULL; } } else { if (!new_pssp->mPartSysData.unpack(dp)) { return NULL; } } if (new_pssp->mPartSysData.mTargetUUID.notNull()) { LLViewerObject *target_objp = gObjectList.findObject(new_pssp->mPartSysData.mTargetUUID); new_pssp->setTargetObject(target_objp); } return new_pssp; } else { if (legacy) { if (!pssp->mPartSysData.unpackLegacy(dp)) { return NULL; } } else { if (!pssp->mPartSysData.unpack(dp)) { return NULL; } } if (pssp->mPartSysData.mTargetUUID.notNull()) { LLViewerObject *target_objp = gObjectList.findObject(pssp->mPartSysData.mTargetUUID); pssp->setTargetObject(target_objp); } return pssp; } } /* static */ LLPointer<LLViewerPartSourceScript> LLViewerPartSourceScript::createPSS(LLViewerObject *source_objp, const LLPartSysData& particle_parameters) { LLPointer<LLViewerPartSourceScript> new_pssp = new LLViewerPartSourceScript(source_objp); new_pssp->mPartSysData = particle_parameters; if (new_pssp->mPartSysData.mTargetUUID.notNull()) { LLViewerObject *target_objp = gObjectList.findObject(new_pssp->mPartSysData.mTargetUUID); new_pssp->setTargetObject(target_objp); } return new_pssp; } void LLViewerPartSourceScript::setImage(LLViewerTexture *imagep) { mImagep = imagep; } void LLViewerPartSourceScript::setTargetObject(LLViewerObject *objp) { mTargetObjectp = objp; } LLViewerPartSourceSpiral::LLViewerPartSourceSpiral(const LLVector3 &pos) : LLViewerPartSource(LL_PART_SOURCE_CHAT) { mPosAgent = pos; } void LLViewerPartSourceSpiral::setDead() { mIsDead = TRUE; mSourceObjectp = NULL; } void LLViewerPartSourceSpiral::updatePart(LLViewerPart &part, const F32 dt) { F32 frac = part.mLastUpdateTime/part.mMaxAge; LLVector3 center_pos; LLPointer<LLViewerPartSource>& ps = part.mPartSourcep; LLViewerPartSourceSpiral *pss = (LLViewerPartSourceSpiral *)ps.get(); if (!pss->mSourceObjectp.isNull() && !pss->mSourceObjectp->mDrawable.isNull()) { part.mPosAgent = pss->mSourceObjectp->getRenderPosition(); } else { part.mPosAgent = pss->mPosAgent; } F32 x = sin(F_TWO_PI*frac + part.mParameter); F32 y = cos(F_TWO_PI*frac + part.mParameter); part.mPosAgent.mV[VX] += x; part.mPosAgent.mV[VY] += y; part.mPosAgent.mV[VZ] += -0.5f + frac; } void LLViewerPartSourceSpiral::update(const F32 dt) { if (!mImagep) { mImagep = LLViewerTextureManager::getFetchedTextureFromFile("pixiesmall.j2c"); } const F32 RATE = 0.025f; mLastUpdateTime += dt; F32 dt_update = mLastUpdateTime - mLastPartTime; F32 max_time = llmax(1.f, 10.f*RATE); dt_update = llmin(max_time, dt_update); if (dt_update > RATE) { mLastPartTime = mLastUpdateTime; if (!LLViewerPartSim::getInstance()->shouldAddPart()) { // Particle simulation says we have too many particles, skip all this return; } if (!mSourceObjectp.isNull() && !mSourceObjectp->mDrawable.isNull()) { mPosAgent = mSourceObjectp->getRenderPosition(); } LLViewerPart* part = new LLViewerPart(); part->init(this, mImagep, updatePart); part->mStartColor = mColor; part->mEndColor = mColor; part->mEndColor.mV[3] = 0.f; part->mPosAgent = mPosAgent; part->mMaxAge = 1.f; part->mFlags = LLViewerPart::LL_PART_INTERP_COLOR_MASK; part->mLastUpdateTime = 0.f; part->mScale.mV[0] = 0.25f; part->mScale.mV[1] = 0.25f; part->mParameter = ll_frand(F_TWO_PI); part->mBlendFuncDest = LLRender::BF_ONE_MINUS_SOURCE_ALPHA; part->mBlendFuncSource = LLRender::BF_SOURCE_ALPHA; part->mStartGlow = 0.f; part->mEndGlow = 0.f; part->mGlow = LLColor4U(0, 0, 0, 0); LLViewerPartSim::getInstance()->addPart(part); } } void LLViewerPartSourceSpiral::setSourceObject(LLViewerObject *objp) { mSourceObjectp = objp; } void LLViewerPartSourceSpiral::setColor(const LLColor4 &color) { mColor = color; } LLViewerPartSourceBeam::LLViewerPartSourceBeam() : LLViewerPartSource(LL_PART_SOURCE_BEAM) { } LLViewerPartSourceBeam::~LLViewerPartSourceBeam() { } void LLViewerPartSourceBeam::setDead() { mIsDead = TRUE; mSourceObjectp = NULL; mTargetObjectp = NULL; } void LLViewerPartSourceBeam::setColor(const LLColor4 &color) { mColor = color; } void LLViewerPartSourceBeam::updatePart(LLViewerPart &part, const F32 dt) { F32 frac = part.mLastUpdateTime/part.mMaxAge; LLViewerPartSource *ps = (LLViewerPartSource*)part.mPartSourcep; LLViewerPartSourceBeam *psb = (LLViewerPartSourceBeam *)ps; if (psb->mSourceObjectp.isNull()) { part.mFlags = LLPartData::LL_PART_DEAD_MASK; return; } LLVector3 source_pos_agent; LLVector3 target_pos_agent; if (!psb->mSourceObjectp.isNull() && !psb->mSourceObjectp->mDrawable.isNull()) { if (psb->mSourceObjectp->isAvatar()) { LLViewerObject *objp = psb->mSourceObjectp; LLVOAvatar *avp = (LLVOAvatar *)objp; source_pos_agent = avp->mWristLeftp->getWorldPosition(); } else { source_pos_agent = psb->mSourceObjectp->getRenderPosition(); } } if (!psb->mTargetObjectp.isNull() && !psb->mTargetObjectp->mDrawable.isNull()) { target_pos_agent = psb->mTargetObjectp->getRenderPosition(); } part.mPosAgent = (1.f - frac) * source_pos_agent; if (psb->mTargetObjectp.isNull()) { part.mPosAgent += frac * (gAgent.getPosAgentFromGlobal(psb->mLKGTargetPosGlobal)); } else { part.mPosAgent += frac * target_pos_agent; } } void LLViewerPartSourceBeam::update(const F32 dt) { const F32 RATE = 0.025f; mLastUpdateTime += dt; if (!mSourceObjectp.isNull() && !mSourceObjectp->mDrawable.isNull()) { if (mSourceObjectp->isAvatar()) { LLViewerObject *objp = mSourceObjectp; LLVOAvatar *avp = (LLVOAvatar *)objp; mPosAgent = avp->mWristLeftp->getWorldPosition(); } else { mPosAgent = mSourceObjectp->getRenderPosition(); } } if (!mTargetObjectp.isNull() && !mTargetObjectp->mDrawable.isNull()) { mTargetPosAgent = mTargetObjectp->getRenderPosition(); } else if (!mLKGTargetPosGlobal.isExactlyZero()) { mTargetPosAgent = gAgent.getPosAgentFromGlobal(mLKGTargetPosGlobal); } F32 dt_update = mLastUpdateTime - mLastPartTime; F32 max_time = llmax(1.f, 10.f*RATE); dt_update = llmin(max_time, dt_update); if (dt_update > RATE) { mLastPartTime = mLastUpdateTime; if (!LLViewerPartSim::getInstance()->shouldAddPart()) { // Particle simulation says we have too many particles, skip all this return; } if (!mImagep) { mImagep = LLViewerTextureManager::getFetchedTextureFromFile("pixiesmall.j2c"); } LLViewerPart* part = new LLViewerPart(); part->init(this, mImagep, updatePart); part->mFlags = LLPartData::LL_PART_INTERP_COLOR_MASK | LLPartData::LL_PART_INTERP_SCALE_MASK | LLPartData::LL_PART_TARGET_POS_MASK | LLPartData::LL_PART_FOLLOW_VELOCITY_MASK; part->mMaxAge = 0.5f; part->mStartColor = mColor; part->mEndColor = part->mStartColor; part->mEndColor.mV[3] = 0.4f; part->mColor = part->mStartColor; part->mStartScale = LLVector2(0.1f, 0.1f); part->mEndScale = LLVector2(0.1f, 0.1f); part->mScale = part->mStartScale; part->mPosAgent = mPosAgent; part->mVelocity = mTargetPosAgent - mPosAgent; part->mBlendFuncDest = LLRender::BF_ONE_MINUS_SOURCE_ALPHA; part->mBlendFuncSource = LLRender::BF_SOURCE_ALPHA; part->mStartGlow = 0.f; part->mEndGlow = 0.f; part->mGlow = LLColor4U(0, 0, 0, 0); LLViewerPartSim::getInstance()->addPart(part); } } void LLViewerPartSourceBeam::setSourceObject(LLViewerObject* objp) { mSourceObjectp = objp; } void LLViewerPartSourceBeam::setTargetObject(LLViewerObject* objp) { mTargetObjectp = objp; } LLViewerPartSourceChat::LLViewerPartSourceChat(const LLVector3 &pos) : LLViewerPartSource(LL_PART_SOURCE_SPIRAL) { mPosAgent = pos; } void LLViewerPartSourceChat::setDead() { mIsDead = TRUE; mSourceObjectp = NULL; } void LLViewerPartSourceChat::updatePart(LLViewerPart &part, const F32 dt) { F32 frac = part.mLastUpdateTime/part.mMaxAge; LLVector3 center_pos; LLViewerPartSource *ps = (LLViewerPartSource*)part.mPartSourcep; LLViewerPartSourceChat *pss = (LLViewerPartSourceChat *)ps; if (!pss->mSourceObjectp.isNull() && !pss->mSourceObjectp->mDrawable.isNull()) { part.mPosAgent = pss->mSourceObjectp->getRenderPosition(); } else { part.mPosAgent = pss->mPosAgent; } F32 x = sin(F_TWO_PI*frac + part.mParameter); F32 y = cos(F_TWO_PI*frac + part.mParameter); part.mPosAgent.mV[VX] += x; part.mPosAgent.mV[VY] += y; part.mPosAgent.mV[VZ] += -0.5f + frac; } void LLViewerPartSourceChat::update(const F32 dt) { if (!mImagep) { mImagep = LLViewerTextureManager::getFetchedTextureFromFile("pixiesmall.j2c"); } const F32 RATE = 0.025f; mLastUpdateTime += dt; if (mLastUpdateTime > 2.f) { // Kill particle source because it has outlived its max age... setDead(); return; } F32 dt_update = mLastUpdateTime - mLastPartTime; // Clamp us to generating at most one second's worth of particles on a frame. F32 max_time = llmax(1.f, 10.f*RATE); dt_update = llmin(max_time, dt_update); if (dt_update > RATE) { mLastPartTime = mLastUpdateTime; if (!LLViewerPartSim::getInstance()->shouldAddPart()) { // Particle simulation says we have too many particles, skip all this return; } if (!mSourceObjectp.isNull() && !mSourceObjectp->mDrawable.isNull()) { mPosAgent = mSourceObjectp->getRenderPosition(); } LLViewerPart* part = new LLViewerPart(); part->init(this, mImagep, updatePart); part->mStartColor = mColor; part->mEndColor = mColor; part->mEndColor.mV[3] = 0.f; part->mPosAgent = mPosAgent; part->mMaxAge = 1.f; part->mFlags = LLViewerPart::LL_PART_INTERP_COLOR_MASK; part->mLastUpdateTime = 0.f; part->mScale.mV[0] = 0.25f; part->mScale.mV[1] = 0.25f; part->mParameter = ll_frand(F_TWO_PI); part->mBlendFuncDest = LLRender::BF_ONE_MINUS_SOURCE_ALPHA; part->mBlendFuncSource = LLRender::BF_SOURCE_ALPHA; part->mStartGlow = 0.f; part->mEndGlow = 0.f; part->mGlow = LLColor4U(0, 0, 0, 0); LLViewerPartSim::getInstance()->addPart(part); } } void LLViewerPartSourceChat::setSourceObject(LLViewerObject *objp) { mSourceObjectp = objp; } void LLViewerPartSourceChat::setColor(const LLColor4 &color) { mColor = color; }