/indra/newview/llhudeffectlookat.cpp
C++ | 671 lines | 463 code | 90 blank | 118 comment | 109 complexity | 058b700f5f821c053c24ae1d45bcec6b MD5 | raw file
Possible License(s): LGPL-2.1
1/** 2 * @file llhudeffectlookat.cpp 3 * @brief LLHUDEffectLookAt class implementation 4 * 5 * $LicenseInfo:firstyear=2002&license=viewerlgpl$ 6 * Second Life Viewer Source Code 7 * Copyright (C) 2010, Linden Research, Inc. 8 * 9 * This library is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU Lesser General Public 11 * License as published by the Free Software Foundation; 12 * version 2.1 of the License only. 13 * 14 * This library is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 * Lesser General Public License for more details. 18 * 19 * You should have received a copy of the GNU Lesser General Public 20 * License along with this library; if not, write to the Free Software 21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 22 * 23 * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA 24 * $/LicenseInfo$ 25 */ 26 27#include "llviewerprecompiledheaders.h" 28 29#include "llhudeffectlookat.h" 30 31#include "llrender.h" 32 33#include "message.h" 34#include "llagent.h" 35#include "llagentcamera.h" 36#include "llvoavatar.h" 37#include "lldrawable.h" 38#include "llviewerobjectlist.h" 39#include "llrendersphere.h" 40#include "llselectmgr.h" 41#include "llglheaders.h" 42 43 44#include "llxmltree.h" 45 46 47BOOL LLHUDEffectLookAt::sDebugLookAt = FALSE; 48 49// packet layout 50const S32 SOURCE_AVATAR = 0; 51const S32 TARGET_OBJECT = 16; 52const S32 TARGET_POS = 32; 53const S32 LOOKAT_TYPE = 56; 54const S32 PKT_SIZE = 57; 55 56// throttle 57const F32 MAX_SENDS_PER_SEC = 4.f; 58 59const F32 MIN_DELTAPOS_FOR_UPDATE_SQUARED = 0.05f * 0.05f; 60const F32 MIN_TARGET_OFFSET_SQUARED = 0.0001f; 61 62 63// can't use actual F32_MAX, because we add this to the current frametime 64const F32 MAX_TIMEOUT = F32_MAX / 2.f; 65 66/** 67 * Simple data class holding values for a particular type of attention. 68 */ 69class LLAttention 70{ 71public: 72 LLAttention() 73 : mTimeout(0.f), 74 mPriority(0.f) 75 {} 76 LLAttention(F32 timeout, F32 priority, const std::string& name, LLColor3 color) : 77 mTimeout(timeout), mPriority(priority), mName(name), mColor(color) 78 { 79 } 80 F32 mTimeout, mPriority; 81 std::string mName; 82 LLColor3 mColor; 83}; 84 85/** 86 * Simple data class holding a list of attentions, one for every type. 87 */ 88class LLAttentionSet 89{ 90public: 91 LLAttentionSet(const LLAttention attentions[]) 92 { 93 for(int i=0; i<LOOKAT_NUM_TARGETS; i++) 94 { 95 mAttentions[i] = attentions[i]; 96 } 97 } 98 LLAttention mAttentions[LOOKAT_NUM_TARGETS]; 99 LLAttention& operator[](int idx) { return mAttentions[idx]; } 100}; 101 102// Default attribute set data. 103// Used to initialize the global attribute set objects, one of which will be 104// refered to by the hud object at any given time. 105// Note that the values below are only the default values and that any or all of them 106// can be overwritten with customizing data from the XML file. The actual values below 107// are those that will give exactly the same look-at behavior as before the ability 108// to customize was added. - MG 109static const 110 LLAttention 111 BOY_ATTS[] = { // default set of masculine attentions 112 LLAttention(MAX_TIMEOUT, 0, "None", LLColor3(0.3f, 0.3f, 0.3f)), // LOOKAT_TARGET_NONE 113 LLAttention(3.f, 1, "Idle", LLColor3(0.5f, 0.5f, 0.5f)), // LOOKAT_TARGET_IDLE 114 LLAttention(4.f, 3, "AutoListen", LLColor3(0.5f, 0.5f, 0.5f)), // LOOKAT_TARGET_AUTO_LISTEN 115 LLAttention(2.f, 2, "FreeLook", LLColor3(0.5f, 0.5f, 0.9f)), // LOOKAT_TARGET_FREELOOK 116 LLAttention(4.f, 3, "Respond", LLColor3(0.0f, 0.0f, 0.0f)), // LOOKAT_TARGET_RESPOND 117 LLAttention(1.f, 4, "Hover", LLColor3(0.5f, 0.9f, 0.5f)), // LOOKAT_TARGET_HOVER 118 LLAttention(MAX_TIMEOUT, 0, "Conversation", LLColor3(0.1f, 0.1f, 0.5f)), // LOOKAT_TARGET_CONVERSATION 119 LLAttention(MAX_TIMEOUT, 6, "Select", LLColor3(0.9f, 0.5f, 0.5f)), // LOOKAT_TARGET_SELECT 120 LLAttention(MAX_TIMEOUT, 6, "Focus", LLColor3(0.9f, 0.5f, 0.9f)), // LOOKAT_TARGET_FOCUS 121 LLAttention(MAX_TIMEOUT, 7, "Mouselook", LLColor3(0.9f, 0.9f, 0.5f)), // LOOKAT_TARGET_MOUSELOOK 122 LLAttention(0.f, 8, "Clear", LLColor3(1.0f, 1.0f, 1.0f)), // LOOKAT_TARGET_CLEAR 123 }, 124 GIRL_ATTS[] = { // default set of feminine attentions 125 LLAttention(MAX_TIMEOUT, 0, "None", LLColor3(0.3f, 0.3f, 0.3f)), // LOOKAT_TARGET_NONE 126 LLAttention(3.f, 1, "Idle", LLColor3(0.5f, 0.5f, 0.5f)), // LOOKAT_TARGET_IDLE 127 LLAttention(4.f, 3, "AutoListen", LLColor3(0.5f, 0.5f, 0.5f)), // LOOKAT_TARGET_AUTO_LISTEN 128 LLAttention(2.f, 2, "FreeLook", LLColor3(0.5f, 0.5f, 0.9f)), // LOOKAT_TARGET_FREELOOK 129 LLAttention(4.f, 3, "Respond", LLColor3(0.0f, 0.0f, 0.0f)), // LOOKAT_TARGET_RESPOND 130 LLAttention(1.f, 4, "Hover", LLColor3(0.5f, 0.9f, 0.5f)), // LOOKAT_TARGET_HOVER 131 LLAttention(MAX_TIMEOUT, 0, "Conversation", LLColor3(0.1f, 0.1f, 0.5f)), // LOOKAT_TARGET_CONVERSATION 132 LLAttention(MAX_TIMEOUT, 6, "Select", LLColor3(0.9f, 0.5f, 0.5f)), // LOOKAT_TARGET_SELECT 133 LLAttention(MAX_TIMEOUT, 6, "Focus", LLColor3(0.9f, 0.5f, 0.9f)), // LOOKAT_TARGET_FOCUS 134 LLAttention(MAX_TIMEOUT, 7, "Mouselook", LLColor3(0.9f, 0.9f, 0.5f)), // LOOKAT_TARGET_MOUSELOOK 135 LLAttention(0.f, 8, "Clear", LLColor3(1.0f, 1.0f, 1.0f)), // LOOKAT_TARGET_CLEAR 136 }; 137 138static LLAttentionSet 139 gBoyAttentions(BOY_ATTS), 140 gGirlAttentions(GIRL_ATTS); 141 142 143static BOOL loadGender(LLXmlTreeNode* gender) 144{ 145 if( !gender) 146 { 147 return FALSE; 148 } 149 std::string str; 150 gender->getAttributeString("name", str); 151 LLAttentionSet& attentions = (str.compare("Masculine") == 0) ? gBoyAttentions : gGirlAttentions; 152 for (LLXmlTreeNode* attention_node = gender->getChildByName( "param" ); 153 attention_node; 154 attention_node = gender->getNextNamedChild()) 155 { 156 attention_node->getAttributeString("attention", str); 157 LLAttention* attention; 158 if (str == "idle") attention = &attentions[LOOKAT_TARGET_IDLE]; 159 else if(str == "auto_listen") attention = &attentions[LOOKAT_TARGET_AUTO_LISTEN]; 160 else if(str == "freelook") attention = &attentions[LOOKAT_TARGET_FREELOOK]; 161 else if(str == "respond") attention = &attentions[LOOKAT_TARGET_RESPOND]; 162 else if(str == "hover") attention = &attentions[LOOKAT_TARGET_HOVER]; 163 else if(str == "conversation") attention = &attentions[LOOKAT_TARGET_CONVERSATION]; 164 else if(str == "select") attention = &attentions[LOOKAT_TARGET_SELECT]; 165 else if(str == "focus") attention = &attentions[LOOKAT_TARGET_FOCUS]; 166 else if(str == "mouselook") attention = &attentions[LOOKAT_TARGET_MOUSELOOK]; 167 else return FALSE; 168 169 F32 priority, timeout; 170 attention_node->getAttributeF32("priority", priority); 171 attention_node->getAttributeF32("timeout", timeout); 172 if(timeout < 0) timeout = MAX_TIMEOUT; 173 attention->mPriority = priority; 174 attention->mTimeout = timeout; 175 } 176 return TRUE; 177} 178 179static BOOL loadAttentions() 180{ 181 static BOOL first_time = TRUE; 182 if( ! first_time) 183 { 184 return TRUE; // maybe not ideal but otherwise it can continue to fail forever. 185 } 186 first_time = FALSE; 187 188 std::string filename; 189 filename = gDirUtilp->getExpandedFilename(LL_PATH_CHARACTER,"attentions.xml"); 190 LLXmlTree xml_tree; 191 BOOL success = xml_tree.parseFile( filename, FALSE ); 192 if( !success ) 193 { 194 return FALSE; 195 } 196 LLXmlTreeNode* root = xml_tree.getRoot(); 197 if( !root ) 198 { 199 return FALSE; 200 } 201 202 //------------------------------------------------------------------------- 203 // <linden_attentions version="1.0"> (root) 204 //------------------------------------------------------------------------- 205 if( !root->hasName( "linden_attentions" ) ) 206 { 207 llwarns << "Invalid linden_attentions file header: " << filename << llendl; 208 return FALSE; 209 } 210 211 std::string version; 212 static LLStdStringHandle version_string = LLXmlTree::addAttributeString("version"); 213 if( !root->getFastAttributeString( version_string, version ) || (version != "1.0") ) 214 { 215 llwarns << "Invalid linden_attentions file version: " << version << llendl; 216 return FALSE; 217 } 218 219 //------------------------------------------------------------------------- 220 // <gender> 221 //------------------------------------------------------------------------- 222 for (LLXmlTreeNode* child = root->getChildByName( "gender" ); 223 child; 224 child = root->getNextNamedChild()) 225 { 226 if( !loadGender( child ) ) 227 { 228 return FALSE; 229 } 230 } 231 232 return TRUE; 233} 234 235 236 237 238//----------------------------------------------------------------------------- 239// LLHUDEffectLookAt() 240//----------------------------------------------------------------------------- 241LLHUDEffectLookAt::LLHUDEffectLookAt(const U8 type) : 242 LLHUDEffect(type), 243 mKillTime(0.f), 244 mLastSendTime(0.f) 245{ 246 clearLookAtTarget(); 247 // parse the default sets 248 loadAttentions(); 249 // initialize current attention set. switches when avatar sex changes. 250 mAttentions = &gGirlAttentions; 251} 252 253//----------------------------------------------------------------------------- 254// ~LLHUDEffectLookAt() 255//----------------------------------------------------------------------------- 256LLHUDEffectLookAt::~LLHUDEffectLookAt() 257{ 258} 259 260//----------------------------------------------------------------------------- 261// packData() 262//----------------------------------------------------------------------------- 263void LLHUDEffectLookAt::packData(LLMessageSystem *mesgsys) 264{ 265 // Pack the default data 266 LLHUDEffect::packData(mesgsys); 267 268 // Pack the type-specific data. Uses a fun packed binary format. Whee! 269 U8 packed_data[PKT_SIZE]; 270 memset(packed_data, 0, PKT_SIZE); 271 272 if (mSourceObject) 273 { 274 htonmemcpy(&(packed_data[SOURCE_AVATAR]), mSourceObject->mID.mData, MVT_LLUUID, 16); 275 } 276 else 277 { 278 htonmemcpy(&(packed_data[SOURCE_AVATAR]), LLUUID::null.mData, MVT_LLUUID, 16); 279 } 280 281 // pack both target object and position 282 // position interpreted as offset if target object is non-null 283 if (mTargetObject) 284 { 285 htonmemcpy(&(packed_data[TARGET_OBJECT]), mTargetObject->mID.mData, MVT_LLUUID, 16); 286 } 287 else 288 { 289 htonmemcpy(&(packed_data[TARGET_OBJECT]), LLUUID::null.mData, MVT_LLUUID, 16); 290 } 291 292 htonmemcpy(&(packed_data[TARGET_POS]), mTargetOffsetGlobal.mdV, MVT_LLVector3d, 24); 293 294 U8 lookAtTypePacked = (U8)mTargetType; 295 296 htonmemcpy(&(packed_data[LOOKAT_TYPE]), &lookAtTypePacked, MVT_U8, 1); 297 298 mesgsys->addBinaryDataFast(_PREHASH_TypeData, packed_data, PKT_SIZE); 299 300 mLastSendTime = mTimer.getElapsedTimeF32(); 301} 302 303//----------------------------------------------------------------------------- 304// unpackData() 305//----------------------------------------------------------------------------- 306void LLHUDEffectLookAt::unpackData(LLMessageSystem *mesgsys, S32 blocknum) 307{ 308 LLVector3d new_target; 309 U8 packed_data[PKT_SIZE]; 310 311 LLUUID dataId; 312 mesgsys->getUUIDFast(_PREHASH_Effect, _PREHASH_ID, dataId, blocknum); 313 314 if (!gAgentCamera.mLookAt.isNull() && dataId == gAgentCamera.mLookAt->getID()) 315 { 316 return; 317 } 318 319 LLHUDEffect::unpackData(mesgsys, blocknum); 320 LLUUID source_id; 321 LLUUID target_id; 322 S32 size = mesgsys->getSizeFast(_PREHASH_Effect, blocknum, _PREHASH_TypeData); 323 if (size != PKT_SIZE) 324 { 325 llwarns << "LookAt effect with bad size " << size << llendl; 326 return; 327 } 328 mesgsys->getBinaryDataFast(_PREHASH_Effect, _PREHASH_TypeData, packed_data, PKT_SIZE, blocknum); 329 330 htonmemcpy(source_id.mData, &(packed_data[SOURCE_AVATAR]), MVT_LLUUID, 16); 331 332 LLViewerObject *objp = gObjectList.findObject(source_id); 333 if (objp && objp->isAvatar()) 334 { 335 setSourceObject(objp); 336 } 337 else 338 { 339 //llwarns << "Could not find source avatar for lookat effect" << llendl; 340 return; 341 } 342 343 htonmemcpy(target_id.mData, &(packed_data[TARGET_OBJECT]), MVT_LLUUID, 16); 344 345 objp = gObjectList.findObject(target_id); 346 347 htonmemcpy(new_target.mdV, &(packed_data[TARGET_POS]), MVT_LLVector3d, 24); 348 349 if (objp) 350 { 351 setTargetObjectAndOffset(objp, new_target); 352 } 353 else if (target_id.isNull()) 354 { 355 setTargetPosGlobal(new_target); 356 } 357 else 358 { 359 //llwarns << "Could not find target object for lookat effect" << llendl; 360 } 361 362 U8 lookAtTypeUnpacked = 0; 363 htonmemcpy(&lookAtTypeUnpacked, &(packed_data[LOOKAT_TYPE]), MVT_U8, 1); 364 mTargetType = (ELookAtType)lookAtTypeUnpacked; 365 366 if (mTargetType == LOOKAT_TARGET_NONE) 367 { 368 clearLookAtTarget(); 369 } 370} 371 372//----------------------------------------------------------------------------- 373// setTargetObjectAndOffset() 374//----------------------------------------------------------------------------- 375void LLHUDEffectLookAt::setTargetObjectAndOffset(LLViewerObject *objp, LLVector3d offset) 376{ 377 mTargetObject = objp; 378 mTargetOffsetGlobal = offset; 379} 380 381//----------------------------------------------------------------------------- 382// setTargetPosGlobal() 383//----------------------------------------------------------------------------- 384void LLHUDEffectLookAt::setTargetPosGlobal(const LLVector3d &target_pos_global) 385{ 386 mTargetObject = NULL; 387 mTargetOffsetGlobal = target_pos_global; 388} 389 390//----------------------------------------------------------------------------- 391// setLookAt() 392// called by agent logic to set look at behavior locally, and propagate to sim 393//----------------------------------------------------------------------------- 394BOOL LLHUDEffectLookAt::setLookAt(ELookAtType target_type, LLViewerObject *object, LLVector3 position) 395{ 396 if (!mSourceObject) 397 { 398 return FALSE; 399 } 400 401 if (target_type >= LOOKAT_NUM_TARGETS) 402 { 403 llwarns << "Bad target_type " << (int)target_type << " - ignoring." << llendl; 404 return FALSE; 405 } 406 407 // must be same or higher priority than existing effect 408 if ((*mAttentions)[target_type].mPriority < (*mAttentions)[mTargetType].mPriority) 409 { 410 return FALSE; 411 } 412 413 F32 current_time = mTimer.getElapsedTimeF32(); 414 415 // type of lookat behavior or target object has changed 416 BOOL lookAtChanged = (target_type != mTargetType) || (object != mTargetObject); 417 418 // lookat position has moved a certain amount and we haven't just sent an update 419 lookAtChanged = lookAtChanged || ((dist_vec_squared(position, mLastSentOffsetGlobal) > MIN_DELTAPOS_FOR_UPDATE_SQUARED) && 420 ((current_time - mLastSendTime) > (1.f / MAX_SENDS_PER_SEC))); 421 422 if (lookAtChanged) 423 { 424 mLastSentOffsetGlobal = position; 425 F32 timeout = (*mAttentions)[target_type].mTimeout; 426 setDuration(timeout); 427 setNeedsSendToSim(TRUE); 428 } 429 430 if (target_type == LOOKAT_TARGET_CLEAR) 431 { 432 clearLookAtTarget(); 433 } 434 else 435 { 436 mTargetType = target_type; 437 mTargetObject = object; 438 if (object) 439 { 440 mTargetOffsetGlobal.setVec(position); 441 } 442 else 443 { 444 mTargetOffsetGlobal = gAgent.getPosGlobalFromAgent(position); 445 } 446 mKillTime = mTimer.getElapsedTimeF32() + mDuration; 447 448 update(); 449 } 450 return TRUE; 451} 452 453//----------------------------------------------------------------------------- 454// clearLookAtTarget() 455//----------------------------------------------------------------------------- 456void LLHUDEffectLookAt::clearLookAtTarget() 457{ 458 mTargetObject = NULL; 459 mTargetOffsetGlobal.clearVec(); 460 mTargetType = LOOKAT_TARGET_NONE; 461 if (mSourceObject.notNull()) 462 { 463 ((LLVOAvatar*)(LLViewerObject*)mSourceObject)->stopMotion(ANIM_AGENT_HEAD_ROT); 464 } 465} 466 467//----------------------------------------------------------------------------- 468// markDead() 469//----------------------------------------------------------------------------- 470void LLHUDEffectLookAt::markDead() 471{ 472 if (mSourceObject.notNull()) 473 { 474 ((LLVOAvatar*)(LLViewerObject*)mSourceObject)->removeAnimationData("LookAtPoint"); 475 } 476 477 mSourceObject = NULL; 478 clearLookAtTarget(); 479 LLHUDEffect::markDead(); 480} 481 482void LLHUDEffectLookAt::setSourceObject(LLViewerObject* objectp) 483{ 484 // restrict source objects to avatars 485 if (objectp && objectp->isAvatar()) 486 { 487 LLHUDEffect::setSourceObject(objectp); 488 } 489} 490 491//----------------------------------------------------------------------------- 492// render() 493//----------------------------------------------------------------------------- 494void LLHUDEffectLookAt::render() 495{ 496 if (sDebugLookAt && mSourceObject.notNull()) 497 { 498 gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE); 499 500 LLVector3 target = mTargetPos + ((LLVOAvatar*)(LLViewerObject*)mSourceObject)->mHeadp->getWorldPosition(); 501 gGL.matrixMode(LLRender::MM_MODELVIEW); 502 gGL.pushMatrix(); 503 gGL.translatef(target.mV[VX], target.mV[VY], target.mV[VZ]); 504 gGL.scalef(0.3f, 0.3f, 0.3f); 505 gGL.begin(LLRender::LINES); 506 { 507 LLColor3 color = (*mAttentions)[mTargetType].mColor; 508 gGL.color3f(color.mV[VRED], color.mV[VGREEN], color.mV[VBLUE]); 509 gGL.vertex3f(-1.f, 0.f, 0.f); 510 gGL.vertex3f(1.f, 0.f, 0.f); 511 512 gGL.vertex3f(0.f, -1.f, 0.f); 513 gGL.vertex3f(0.f, 1.f, 0.f); 514 515 gGL.vertex3f(0.f, 0.f, -1.f); 516 gGL.vertex3f(0.f, 0.f, 1.f); 517 } gGL.end(); 518 gGL.popMatrix(); 519 } 520} 521 522//----------------------------------------------------------------------------- 523// update() 524//----------------------------------------------------------------------------- 525void LLHUDEffectLookAt::update() 526{ 527 // If the target object is dead, set the target object to NULL 528 if (!mTargetObject.isNull() && mTargetObject->isDead()) 529 { 530 clearLookAtTarget(); 531 } 532 533 // if source avatar is null or dead, mark self as dead and return 534 if (mSourceObject.isNull() || mSourceObject->isDead()) 535 { 536 markDead(); 537 return; 538 } 539 540 // make sure the proper set of avatar attention are currently being used. 541 LLVOAvatar* source_avatar = (LLVOAvatar*)(LLViewerObject*)mSourceObject; 542 // for now the first cut will just switch on sex. future development could adjust 543 // timeouts according to avatar age and/or other features. 544 mAttentions = (source_avatar->getSex() == SEX_MALE) ? &gBoyAttentions : &gGirlAttentions; 545 //printf("updated to %s\n", (source_avatar->getSex() == SEX_MALE) ? "male" : "female"); 546 547 F32 time = mTimer.getElapsedTimeF32(); 548 549 // clear out the effect if time is up 550 if (mKillTime != 0.f && time > mKillTime) 551 { 552 if (mTargetType != LOOKAT_TARGET_NONE) 553 { 554 clearLookAtTarget(); 555 // look at timed out (only happens on own avatar), so tell everyone 556 setNeedsSendToSim(TRUE); 557 } 558 } 559 560 if (mTargetType != LOOKAT_TARGET_NONE) 561 { 562 if (calcTargetPosition()) 563 { 564 LLMotion* head_motion = ((LLVOAvatar*)(LLViewerObject*)mSourceObject)->findMotion(ANIM_AGENT_HEAD_ROT); 565 if (!head_motion || head_motion->isStopped()) 566 { 567 ((LLVOAvatar*)(LLViewerObject*)mSourceObject)->startMotion(ANIM_AGENT_HEAD_ROT); 568 } 569 } 570 } 571 572 if (sDebugLookAt) 573 { 574 ((LLVOAvatar*)(LLViewerObject*)mSourceObject)->addDebugText((*mAttentions)[mTargetType].mName); 575 } 576} 577 578/** 579 * Initializes the mTargetPos member from the current mSourceObjec and mTargetObject 580 * (and possibly mTargetOffsetGlobal). 581 * When mTargetObject is another avatar, it sets mTargetPos to be their eyes. 582 * 583 * Has the side-effect of also calling setAnimationData("LookAtPoint") with the new 584 * mTargetPos on the source object which is assumed to be an avatar. 585 * 586 * Returns whether we successfully calculated a finite target position. 587 */ 588bool LLHUDEffectLookAt::calcTargetPosition() 589{ 590 LLViewerObject *target_obj = (LLViewerObject *)mTargetObject; 591 LLVector3 local_offset; 592 593 if (target_obj) 594 { 595 local_offset.setVec(mTargetOffsetGlobal); 596 } 597 else 598 { 599 local_offset = gAgent.getPosAgentFromGlobal(mTargetOffsetGlobal); 600 } 601 602 LLVOAvatar* source_avatar = (LLVOAvatar*)(LLViewerObject*)mSourceObject; 603 if (!source_avatar->isBuilt()) 604 return false; 605 606 if (target_obj && target_obj->mDrawable.notNull()) 607 { 608 LLQuaternion target_rot; 609 if (target_obj->isAvatar()) 610 { 611 LLVOAvatar *target_av = (LLVOAvatar *)target_obj; 612 613 BOOL looking_at_self = source_avatar->isSelf() && target_av->isSelf(); 614 615 // if selecting self, stare forward 616 if (looking_at_self && mTargetOffsetGlobal.magVecSquared() < MIN_TARGET_OFFSET_SQUARED) 617 { 618 //sets the lookat point in front of the avatar 619 mTargetOffsetGlobal.setVec(5.0, 0.0, 0.0); 620 local_offset.setVec(mTargetOffsetGlobal); 621 } 622 623 // look the other avatar in the eye. note: what happens if target is self? -MG 624 mTargetPos = target_av->mHeadp->getWorldPosition(); 625 if (mTargetType == LOOKAT_TARGET_MOUSELOOK || mTargetType == LOOKAT_TARGET_FREELOOK) 626 { 627 // mouselook and freelook target offsets are absolute 628 target_rot = LLQuaternion::DEFAULT; 629 } 630 else if (looking_at_self && gAgentCamera.cameraCustomizeAvatar()) 631 { 632 // *NOTE: We have to do this because animation 633 // overrides do not set lookat behavior. 634 // *TODO: animation overrides for lookat behavior. 635 target_rot = target_av->mPelvisp->getWorldRotation(); 636 } 637 else 638 { 639 target_rot = target_av->mRoot.getWorldRotation(); 640 } 641 } 642 else // target obj is not an avatar 643 { 644 if (target_obj->mDrawable->getGeneration() == -1) 645 { 646 mTargetPos = target_obj->getPositionAgent(); 647 target_rot = target_obj->getWorldRotation(); 648 } 649 else 650 { 651 mTargetPos = target_obj->getRenderPosition(); 652 target_rot = target_obj->getRenderRotation(); 653 } 654 } 655 656 mTargetPos += (local_offset * target_rot); 657 } 658 else // no target obj or it's not drawable 659 { 660 mTargetPos = local_offset; 661 } 662 663 mTargetPos -= source_avatar->mHeadp->getWorldPosition(); 664 665 if (!mTargetPos.isFinite()) 666 return false; 667 668 source_avatar->setAnimationData("LookAtPoint", (void *)&mTargetPos); 669 670 return true; 671}