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Diffstat (limited to 'indra/newview/llvieweroctree.cpp')
| -rw-r--r-- | indra/newview/llvieweroctree.cpp | 1560 |
1 files changed, 1560 insertions, 0 deletions
diff --git a/indra/newview/llvieweroctree.cpp b/indra/newview/llvieweroctree.cpp new file mode 100644 index 0000000000..03c3f0fc08 --- /dev/null +++ b/indra/newview/llvieweroctree.cpp @@ -0,0 +1,1560 @@ +/** + * @file llvieweroctree.cpp + * @brief LLViewerOctreeGroup class implementation and supporting functions + * + * $LicenseInfo:firstyear=2003&license=viewerlgpl$ + * 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 "llvieweroctree.h" +#include "llviewerregion.h" +#include "pipeline.h" +#include "llviewercontrol.h" +#include "llappviewer.h" +#include "llglslshader.h" +#include "llviewershadermgr.h" + +//----------------------------------------------------------------------------------- +//static variables definitions +//----------------------------------------------------------------------------------- +U32 LLViewerOctreeEntryData::sCurVisible = 10; //reserve the low numbers for special use. +BOOL LLViewerOctreeDebug::sInDebug = FALSE; + +static LLTrace::CountStatHandle<S32> sOcclusionQueries("occlusion_queries", "Number of occlusion queries executed"), + sNumObjectsOccluded("occluded_objects", "Count of objects being occluded by a query"), + sNumObjectsUnoccluded("unoccluded_objects", "Count of objects being unoccluded by a query"); + +//----------------------------------------------------------------------------------- +//some global functions definitions +//----------------------------------------------------------------------------------- +typedef enum +{ + b000 = 0x00, + b001 = 0x01, + b010 = 0x02, + b011 = 0x03, + b100 = 0x04, + b101 = 0x05, + b110 = 0x06, + b111 = 0x07, +} eLoveTheBits; + +//contact Runitai Linden for a copy of the SL object used to write this table +//basically, you give the table a bitmask of the look-at vector to a node and it +//gives you a triangle fan index array +static U16 sOcclusionIndices[] = +{ + //000 + b111, b110, b010, b011, b001, b101, b100, b110, + //001 + b011, b010, b000, b001, b101, b111, b110, b010, + //010 + b101, b100, b110, b111, b011, b001, b000, b100, + //011 + b001, b000, b100, b101, b111, b011, b010, b000, + //100 + b110, b000, b010, b011, b111, b101, b100, b000, + //101 + b010, b100, b000, b001, b011, b111, b110, b100, + //110 + b100, b010, b110, b111, b101, b001, b000, b010, + //111 + b000, b110, b100, b101, b001, b011, b010, b110, +}; + +U32 get_box_fan_indices(LLCamera* camera, const LLVector4a& center) +{ + LLVector4a origin; + origin.load3(camera->getOrigin().mV); + + S32 cypher = center.greaterThan(origin).getGatheredBits() & 0x7; + + return cypher*8; +} + +U8* get_box_fan_indices_ptr(LLCamera* camera, const LLVector4a& center) +{ + LLVector4a origin; + origin.load3(camera->getOrigin().mV); + + S32 cypher = center.greaterThan(origin).getGatheredBits() & 0x7; + + return (U8*) (sOcclusionIndices+cypher*8); +} + +//create a vertex buffer for efficiently rendering cubes +LLVertexBuffer* ll_create_cube_vb(U32 type_mask, U32 usage) +{ + LLVertexBuffer* ret = new LLVertexBuffer(type_mask, usage); + + ret->allocateBuffer(8, 64, true); + + LLStrider<LLVector3> pos; + LLStrider<U16> idx; + + ret->getVertexStrider(pos); + ret->getIndexStrider(idx); + + pos[0] = LLVector3(-1,-1,-1); + pos[1] = LLVector3(-1,-1, 1); + pos[2] = LLVector3(-1, 1,-1); + pos[3] = LLVector3(-1, 1, 1); + pos[4] = LLVector3( 1,-1,-1); + pos[5] = LLVector3( 1,-1, 1); + pos[6] = LLVector3( 1, 1,-1); + pos[7] = LLVector3( 1, 1, 1); + + for (U32 i = 0; i < 64; i++) + { + idx[i] = sOcclusionIndices[i]; + } + + ret->flush(); + + return ret; +} + + +#define LL_TRACK_PENDING_OCCLUSION_QUERIES 0 + +const F32 SG_OCCLUSION_FUDGE = 0.25f; +#define SG_DISCARD_TOLERANCE 0.01f + + +S32 AABBSphereIntersect(const LLVector3& min, const LLVector3& max, const LLVector3 &origin, const F32 &rad) +{ + return AABBSphereIntersectR2(min, max, origin, rad*rad); +} + +S32 AABBSphereIntersectR2(const LLVector3& min, const LLVector3& max, const LLVector3 &origin, const F32 &r) +{ + F32 d = 0.f; + F32 t; + + if ((min-origin).magVecSquared() < r && + (max-origin).magVecSquared() < r) + { + return 2; + } + + for (U32 i = 0; i < 3; i++) + { + if (origin.mV[i] < min.mV[i]) + { + t = min.mV[i] - origin.mV[i]; + d += t*t; + } + else if (origin.mV[i] > max.mV[i]) + { + t = origin.mV[i] - max.mV[i]; + d += t*t; + } + + if (d > r) + { + return 0; + } + } + + return 1; +} + + +S32 AABBSphereIntersect(const LLVector4a& min, const LLVector4a& max, const LLVector3 &origin, const F32 &rad) +{ + return AABBSphereIntersectR2(min, max, origin, rad*rad); +} + +S32 AABBSphereIntersectR2(const LLVector4a& min, const LLVector4a& max, const LLVector3 &origin, const F32 &r) +{ + F32 d = 0.f; + F32 t; + + LLVector4a origina; + origina.load3(origin.mV); + + LLVector4a v; + v.setSub(min, origina); + + if (v.dot3(v) < r) + { + v.setSub(max, origina); + if (v.dot3(v) < r) + { + return 2; + } + } + + + for (U32 i = 0; i < 3; i++) + { + if (origin.mV[i] < min[i]) + { + t = min[i] - origin.mV[i]; + d += t*t; + } + else if (origin.mV[i] > max[i]) + { + t = origin.mV[i] - max[i]; + d += t*t; + } + + if (d > r) + { + return 0; + } + } + + return 1; +} + +//----------------------------------------------------------------------------------- +//class LLViewerOctreeEntry definitions +//----------------------------------------------------------------------------------- +LLViewerOctreeEntry::LLViewerOctreeEntry() +: LLTrace::MemTrackable<LLViewerOctreeEntry, 16>("LLViewerOctreeEntry"), + mGroup(NULL), + mBinRadius(0.f), + mBinIndex(-1), + mVisible(0) +{ + mPositionGroup.clear(); + mExtents[0].clear(); + mExtents[1].clear(); + + for(S32 i = 0; i < NUM_DATA_TYPE; i++) + { + mData[i] = NULL; + } +} + +LLViewerOctreeEntry::~LLViewerOctreeEntry() +{ + llassert(!mGroup); +} + +void LLViewerOctreeEntry::addData(LLViewerOctreeEntryData* data) +{ + //llassert(mData[data->getDataType()] == NULL); + llassert(data != NULL); + + mData[data->getDataType()] = data; +} + +void LLViewerOctreeEntry::removeData(LLViewerOctreeEntryData* data) +{ + //llassert(data->getDataType() != LLVOCACHEENTRY); //can not remove VOCache entry + + if(!mData[data->getDataType()]) + { + return; + } + if(mData[data->getDataType()] != data) + { + return; + } + + mData[data->getDataType()] = NULL; + + if(mGroup != NULL && !mData[LLDRAWABLE]) + { + LLViewerOctreeGroup* group = mGroup; + mGroup = NULL; + group->removeFromGroup(data); + + llassert(mBinIndex == -1); + } +} + +//called by group handleDestruction() ONLY when group is destroyed by octree. +void LLViewerOctreeEntry::nullGroup() +{ + mGroup = NULL; +} + +void LLViewerOctreeEntry::setGroup(LLViewerOctreeGroup* group) +{ + if(mGroup == group) + { + return; + } + + if(mGroup) + { + LLViewerOctreeGroup* old_group = mGroup; + mGroup = NULL; + old_group->removeFromGroup(this); + + llassert(mBinIndex == -1); + } + + mGroup = group; +} + +//----------------------------------------------------------------------------------- +//class LLViewerOctreeEntryData definitions +//----------------------------------------------------------------------------------- +LLViewerOctreeEntryData::~LLViewerOctreeEntryData() +{ + if(mEntry) + { + mEntry->removeData(this); + } +} + +LLViewerOctreeEntryData::LLViewerOctreeEntryData(LLViewerOctreeEntry::eEntryDataType_t data_type) + : mDataType(data_type), + mEntry(NULL) +{ +} + +//virtual +void LLViewerOctreeEntryData::setOctreeEntry(LLViewerOctreeEntry* entry) +{ + llassert_always(mEntry.isNull()); + + if(mEntry.notNull()) + { + return; + } + + if(!entry) + { + mEntry = new LLViewerOctreeEntry(); + } + else + { + mEntry = entry; + } + mEntry->addData(this); +} + +void LLViewerOctreeEntryData::removeOctreeEntry() +{ + if(mEntry) + { + mEntry->removeData(this); + mEntry = NULL; + } +} + +void LLViewerOctreeEntryData::setSpatialExtents(const LLVector3& min, const LLVector3& max) +{ + mEntry->mExtents[0].load3(min.mV); + mEntry->mExtents[1].load3(max.mV); +} + +void LLViewerOctreeEntryData::setSpatialExtents(const LLVector4a& min, const LLVector4a& max) +{ + mEntry->mExtents[0] = min; + mEntry->mExtents[1] = max; +} + +void LLViewerOctreeEntryData::setPositionGroup(const LLVector4a& pos) +{ + mEntry->mPositionGroup = pos; +} + +const LLVector4a* LLViewerOctreeEntryData::getSpatialExtents() const +{ + return mEntry->getSpatialExtents(); +} + +//virtual +void LLViewerOctreeEntryData::setGroup(LLViewerOctreeGroup* group) +{ + mEntry->setGroup(group); +} + +void LLViewerOctreeEntryData::shift(const LLVector4a &shift_vector) +{ + mEntry->mExtents[0].add(shift_vector); + mEntry->mExtents[1].add(shift_vector); + mEntry->mPositionGroup.add(shift_vector); +} + +LLViewerOctreeGroup* LLViewerOctreeEntryData::getGroup()const +{ + return mEntry.notNull() ? mEntry->mGroup : NULL; +} + +const LLVector4a& LLViewerOctreeEntryData::getPositionGroup() const +{ + return mEntry->getPositionGroup(); +} + +//virtual +bool LLViewerOctreeEntryData::isVisible() const +{ + if(mEntry) + { + return mEntry->mVisible == sCurVisible; + } + return false; +} + +//virtual +bool LLViewerOctreeEntryData::isRecentlyVisible() const +{ + if(!mEntry) + { + return false; + } + + if(isVisible()) + { + return true; + } + if(getGroup() && getGroup()->isRecentlyVisible()) + { + setVisible(); + return true; + } + + return false; +} + +void LLViewerOctreeEntryData::setVisible() const +{ + if(mEntry) + { + mEntry->mVisible = sCurVisible; + } +} + +void LLViewerOctreeEntryData::resetVisible() const +{ + if(mEntry) + { + mEntry->mVisible = 0; + } +} +//----------------------------------------------------------------------------------- +//class LLViewerOctreeGroup definitions +//----------------------------------------------------------------------------------- + +LLViewerOctreeGroup::~LLViewerOctreeGroup() +{ + //empty here +} + +LLViewerOctreeGroup::LLViewerOctreeGroup(OctreeNode* node) +: LLTrace::MemTrackable<LLViewerOctreeGroup, 16>("LLViewerOctreeGroup"), + mOctreeNode(node), + mAnyVisible(0), + mState(CLEAN) +{ + LLVector4a tmp; + tmp.splat(0.f); + mExtents[0] = mExtents[1] = mObjectBounds[0] = mObjectBounds[0] = mObjectBounds[1] = + mObjectExtents[0] = mObjectExtents[1] = tmp; + + mBounds[0] = node->getCenter(); + mBounds[1] = node->getSize(); + + mOctreeNode->addListener(this); +} + +bool LLViewerOctreeGroup::hasElement(LLViewerOctreeEntryData* data) +{ + if(!data->getEntry()) + { + return false; + } + return std::find(getDataBegin(), getDataEnd(), data->getEntry()) != getDataEnd(); +} + +bool LLViewerOctreeGroup::removeFromGroup(LLViewerOctreeEntryData* data) +{ + return removeFromGroup(data->getEntry()); +} + +bool LLViewerOctreeGroup::removeFromGroup(LLViewerOctreeEntry* entry) +{ + llassert(entry != NULL); + llassert(!entry->getGroup()); + + if(isDead()) //group is about to be destroyed, not need to double delete the entry. + { + entry->setBinIndex(-1); + return true; + } + + unbound(); + setState(OBJECT_DIRTY); + + if (mOctreeNode) + { + if (!mOctreeNode->remove(entry)) //this could cause *this* pointer to be destroyed, so no more function calls after this. + { + OCT_ERRS << "Could not remove LLVOCacheEntry from LLVOCacheOctreeGroup" << LL_ENDL; + return false; + } + } + + return true; +} + +//virtual +void LLViewerOctreeGroup::unbound() +{ + if (isDirty()) + { + return; + } + + setState(DIRTY); + + //all the parent nodes need to rebound this child + if (mOctreeNode) + { + OctreeNode* parent = (OctreeNode*) mOctreeNode->getParent(); + while (parent != NULL) + { + LLViewerOctreeGroup* group = (LLViewerOctreeGroup*) parent->getListener(0); + if (!group || group->isDirty()) + { + return; + } + + group->setState(DIRTY); + parent = (OctreeNode*) parent->getParent(); + } + } +} + +//virtual +void LLViewerOctreeGroup::rebound() +{ + if (!isDirty()) + { + return; + } + + if (mOctreeNode->getChildCount() == 1 && mOctreeNode->getElementCount() == 0) + { + LLViewerOctreeGroup* group = (LLViewerOctreeGroup*) mOctreeNode->getChild(0)->getListener(0); + group->rebound(); + + //copy single child's bounding box + mBounds[0] = group->mBounds[0]; + mBounds[1] = group->mBounds[1]; + mExtents[0] = group->mExtents[0]; + mExtents[1] = group->mExtents[1]; + + group->setState(SKIP_FRUSTUM_CHECK); + } + else if (mOctreeNode->isLeaf()) + { //copy object bounding box if this is a leaf + boundObjects(TRUE, mExtents[0], mExtents[1]); + mBounds[0] = mObjectBounds[0]; + mBounds[1] = mObjectBounds[1]; + } + else + { + LLVector4a& newMin = mExtents[0]; + LLVector4a& newMax = mExtents[1]; + LLViewerOctreeGroup* group = (LLViewerOctreeGroup*) mOctreeNode->getChild(0)->getListener(0); + group->clearState(SKIP_FRUSTUM_CHECK); + group->rebound(); + //initialize to first child + newMin = group->mExtents[0]; + newMax = group->mExtents[1]; + + //first, rebound children + for (U32 i = 1; i < mOctreeNode->getChildCount(); i++) + { + group = (LLViewerOctreeGroup*) mOctreeNode->getChild(i)->getListener(0); + group->clearState(SKIP_FRUSTUM_CHECK); + group->rebound(); + const LLVector4a& max = group->mExtents[1]; + const LLVector4a& min = group->mExtents[0]; + + newMax.setMax(newMax, max); + newMin.setMin(newMin, min); + } + + boundObjects(FALSE, newMin, newMax); + + mBounds[0].setAdd(newMin, newMax); + mBounds[0].mul(0.5f); + mBounds[1].setSub(newMax, newMin); + mBounds[1].mul(0.5f); + } + + clearState(DIRTY); + + return; +} + +//virtual +void LLViewerOctreeGroup::handleInsertion(const TreeNode* node, LLViewerOctreeEntry* obj) +{ + obj->setGroup(this); + unbound(); + setState(OBJECT_DIRTY); +} + +//virtual +void LLViewerOctreeGroup::handleRemoval(const TreeNode* node, LLViewerOctreeEntry* obj) +{ + unbound(); + setState(OBJECT_DIRTY); + + obj->setGroup(NULL); //this could cause *this* pointer to be destroyed. So no more function calls after this. +} + +//virtual +void LLViewerOctreeGroup::handleDestruction(const TreeNode* node) +{ + for (OctreeNode::element_iter i = mOctreeNode->getDataBegin(); i != mOctreeNode->getDataEnd(); ++i) + { + LLViewerOctreeEntry* obj = *i; + if (obj && obj->getGroup() == this) + { + obj->nullGroup(); + //obj->setGroup(NULL); + } + } + mOctreeNode = NULL; +} + +//virtual +void LLViewerOctreeGroup::handleStateChange(const TreeNode* node) +{ + //drop bounding box upon state change + if (mOctreeNode != node) + { + mOctreeNode = (OctreeNode*) node; + } + unbound(); +} + +//virtual +void LLViewerOctreeGroup::handleChildAddition(const OctreeNode* parent, OctreeNode* child) +{ + if (child->getListenerCount() == 0) + { + new LLViewerOctreeGroup(child); + } + else + { + OCT_ERRS << "LLViewerOctreeGroup redundancy detected." << LL_ENDL; + } + + unbound(); + + ((LLViewerOctreeGroup*)child->getListener(0))->unbound(); +} + +//virtual +void LLViewerOctreeGroup::handleChildRemoval(const OctreeNode* parent, const OctreeNode* child) +{ + unbound(); +} + +LLViewerOctreeGroup* LLViewerOctreeGroup::getParent() +{ + if (isDead()) + { + return NULL; + } + + if(!mOctreeNode) + { + return NULL; + } + + OctreeNode* parent = mOctreeNode->getOctParent(); + + if (parent) + { + return (LLViewerOctreeGroup*) parent->getListener(0); + } + + return NULL; +} + +//virtual +bool LLViewerOctreeGroup::boundObjects(BOOL empty, LLVector4a& minOut, LLVector4a& maxOut) +{ + const OctreeNode* node = mOctreeNode; + + if (node->isEmpty()) + { //don't do anything if there are no objects + if (empty && mOctreeNode->getParent()) + { //only root is allowed to be empty + OCT_ERRS << "Empty leaf found in octree." << LL_ENDL; + } + return false; + } + + LLVector4a& newMin = mObjectExtents[0]; + LLVector4a& newMax = mObjectExtents[1]; + + if (hasState(OBJECT_DIRTY)) + { //calculate new bounding box + clearState(OBJECT_DIRTY); + + //initialize bounding box to first element + OctreeNode::const_element_iter i = node->getDataBegin(); + LLViewerOctreeEntry* entry = *i; + const LLVector4a* minMax = entry->getSpatialExtents(); + + newMin = minMax[0]; + newMax = minMax[1]; + + for (++i; i != node->getDataEnd(); ++i) + { + entry = *i; + minMax = entry->getSpatialExtents(); + + update_min_max(newMin, newMax, minMax[0]); + update_min_max(newMin, newMax, minMax[1]); + } + + mObjectBounds[0].setAdd(newMin, newMax); + mObjectBounds[0].mul(0.5f); + mObjectBounds[1].setSub(newMax, newMin); + mObjectBounds[1].mul(0.5f); + } + + if (empty) + { + minOut = newMin; + maxOut = newMax; + } + else + { + minOut.setMin(minOut, newMin); + maxOut.setMax(maxOut, newMax); + } + + return TRUE; +} + +//virtual +BOOL LLViewerOctreeGroup::isVisible() const +{ + return mVisible[LLViewerCamera::sCurCameraID] >= LLViewerOctreeEntryData::getCurrentFrame() ? TRUE : FALSE; +} + +//virtual +BOOL LLViewerOctreeGroup::isRecentlyVisible() const +{ + return FALSE; +} + +void LLViewerOctreeGroup::setVisible() +{ + mVisible[LLViewerCamera::sCurCameraID] = LLViewerOctreeEntryData::getCurrentFrame(); + + if(LLViewerCamera::sCurCameraID < LLViewerCamera::CAMERA_WATER0) + { + mAnyVisible = LLViewerOctreeEntryData::getCurrentFrame(); + } +} + +void LLViewerOctreeGroup::checkStates() +{ +#if LL_OCTREE_PARANOIA_CHECK + //LLOctreeStateCheck checker; + //checker.traverse(mOctreeNode); +#endif +} + +//------------------------------------------------------------------------------------------- +//occulsion culling functions and classes +//------------------------------------------------------------------------------------------- +std::set<U32> LLOcclusionCullingGroup::sPendingQueries; +class LLOcclusionQueryPool : public LLGLNamePool +{ +public: + LLOcclusionQueryPool() + { + } + +protected: + + virtual GLuint allocateName() + { + GLuint ret = 0; + + glGenQueriesARB(1, &ret); + + return ret; + } + + virtual void releaseName(GLuint name) + { +#if LL_TRACK_PENDING_OCCLUSION_QUERIES + LLOcclusionCullingGroup::sPendingQueries.erase(name); +#endif + glDeleteQueriesARB(1, &name); + } +}; + +static LLOcclusionQueryPool sQueryPool; +U32 LLOcclusionCullingGroup::getNewOcclusionQueryObjectName() +{ + return sQueryPool.allocate(); +} + +void LLOcclusionCullingGroup::releaseOcclusionQueryObjectName(GLuint name) +{ + sQueryPool.release(name); +} + +//===================================== +// Occlusion State Set/Clear +//===================================== +class LLSpatialSetOcclusionState : public OctreeTraveler +{ +public: + U32 mState; + LLSpatialSetOcclusionState(U32 state) : mState(state) { } + virtual void visit(const OctreeNode* branch) + { + LLOcclusionCullingGroup* group = (LLOcclusionCullingGroup*)branch->getListener(0); + if(group) + { + group->setOcclusionState(mState); + } + } +}; + +class LLSpatialSetOcclusionStateDiff : public LLSpatialSetOcclusionState +{ +public: + LLSpatialSetOcclusionStateDiff(U32 state) : LLSpatialSetOcclusionState(state) { } + + virtual void traverse(const OctreeNode* n) + { + LLOcclusionCullingGroup* group = (LLOcclusionCullingGroup*) n->getListener(0); + + if (group && !group->isOcclusionState(mState)) + { + OctreeTraveler::traverse(n); + } + } +}; + + +LLOcclusionCullingGroup::LLOcclusionCullingGroup(OctreeNode* node, LLViewerOctreePartition* part) : + LLViewerOctreeGroup(node), + mSpatialPartition(part) +{ + part->mLODSeed = (part->mLODSeed+1)%part->mLODPeriod; + mLODHash = part->mLODSeed; + + OctreeNode* oct_parent = node->getOctParent(); + LLOcclusionCullingGroup* parent = oct_parent ? (LLOcclusionCullingGroup*) oct_parent->getListener(0) : NULL; + + for (U32 i = 0; i < LLViewerCamera::NUM_CAMERAS; i++) + { + mOcclusionQuery[i] = 0; + mOcclusionIssued[i] = 0; + mOcclusionState[i] = parent ? SG_STATE_INHERIT_MASK & parent->mOcclusionState[i] : 0; + mVisible[i] = 0; + } +} + +LLOcclusionCullingGroup::~LLOcclusionCullingGroup() +{ + releaseOcclusionQueryObjectNames(); +} + +BOOL LLOcclusionCullingGroup::needsUpdate() +{ + return (LLDrawable::getCurrentFrame() % mSpatialPartition->mLODPeriod == mLODHash) ? TRUE : FALSE; +} + +BOOL LLOcclusionCullingGroup::isRecentlyVisible() const +{ + const S32 MIN_VIS_FRAME_RANGE = 2; + return (LLDrawable::getCurrentFrame() - mVisible[LLViewerCamera::sCurCameraID]) < MIN_VIS_FRAME_RANGE ; +} + +BOOL LLOcclusionCullingGroup::isAnyRecentlyVisible() const +{ + const S32 MIN_VIS_FRAME_RANGE = 2; + return (LLDrawable::getCurrentFrame() - mAnyVisible) < MIN_VIS_FRAME_RANGE ; +} + +//virtual +void LLOcclusionCullingGroup::handleChildAddition(const OctreeNode* parent, OctreeNode* child) +{ + if (child->getListenerCount() == 0) + { + new LLOcclusionCullingGroup(child, mSpatialPartition); + } + else + { + OCT_ERRS << "LLOcclusionCullingGroup redundancy detected." << LL_ENDL; + } + + unbound(); + + ((LLViewerOctreeGroup*)child->getListener(0))->unbound(); +} + +void LLOcclusionCullingGroup::releaseOcclusionQueryObjectNames() +{ + if (gGLManager.mHasOcclusionQuery) + { + for (U32 i = 0; i < LLViewerCamera::NUM_CAMERAS; ++i) + { + if (mOcclusionQuery[i]) + { + releaseOcclusionQueryObjectName(mOcclusionQuery[i]); + mOcclusionQuery[i] = 0; + } + } + } +} + +void LLOcclusionCullingGroup::setOcclusionState(U32 state, S32 mode) +{ + if (mode > STATE_MODE_SINGLE) + { + if (mode == STATE_MODE_DIFF) + { + LLSpatialSetOcclusionStateDiff setter(state); + setter.traverse(mOctreeNode); + } + else if (mode == STATE_MODE_BRANCH) + { + LLSpatialSetOcclusionState setter(state); + setter.traverse(mOctreeNode); + } + else + { + for (U32 i = 0; i < LLViewerCamera::NUM_CAMERAS; i++) + { + mOcclusionState[i] |= state; + + if ((state & DISCARD_QUERY) && mOcclusionQuery[i]) + { + releaseOcclusionQueryObjectName(mOcclusionQuery[i]); + mOcclusionQuery[i] = 0; + } + } + } + } + else + { + if (state & OCCLUDED) + { + add(sNumObjectsOccluded, 1); + } + mOcclusionState[LLViewerCamera::sCurCameraID] |= state; + if ((state & DISCARD_QUERY) && mOcclusionQuery[LLViewerCamera::sCurCameraID]) + { + releaseOcclusionQueryObjectName(mOcclusionQuery[LLViewerCamera::sCurCameraID]); + mOcclusionQuery[LLViewerCamera::sCurCameraID] = 0; + } + } +} + +class LLSpatialClearOcclusionState : public OctreeTraveler +{ +public: + U32 mState; + + LLSpatialClearOcclusionState(U32 state) : mState(state) { } + virtual void visit(const OctreeNode* branch) + { + LLOcclusionCullingGroup* group = (LLOcclusionCullingGroup*)branch->getListener(0); + if(group) + { + group->clearOcclusionState(mState); + } + } +}; + +class LLSpatialClearOcclusionStateDiff : public LLSpatialClearOcclusionState +{ +public: + LLSpatialClearOcclusionStateDiff(U32 state) : LLSpatialClearOcclusionState(state) { } + + virtual void traverse(const OctreeNode* n) + { + LLOcclusionCullingGroup* group = (LLOcclusionCullingGroup*) n->getListener(0); + + if (group && group->isOcclusionState(mState)) + { + OctreeTraveler::traverse(n); + } + } +}; + +void LLOcclusionCullingGroup::clearOcclusionState(U32 state, S32 mode) +{ + if (mode > STATE_MODE_SINGLE) + { + if (mode == STATE_MODE_DIFF) + { + LLSpatialClearOcclusionStateDiff clearer(state); + clearer.traverse(mOctreeNode); + } + else if (mode == STATE_MODE_BRANCH) + { + LLSpatialClearOcclusionState clearer(state); + clearer.traverse(mOctreeNode); + } + else + { + for (U32 i = 0; i < LLViewerCamera::NUM_CAMERAS; i++) + { + mOcclusionState[i] &= ~state; + } + } + } + else + { + if (state & OCCLUDED) + { + add(sNumObjectsUnoccluded, 1); + } + mOcclusionState[LLViewerCamera::sCurCameraID] &= ~state; + } +} + +static LLTrace::BlockTimerStatHandle FTM_OCCLUSION_READBACK("Readback Occlusion"); +static LLTrace::BlockTimerStatHandle FTM_OCCLUSION_WAIT("Occlusion Wait"); + +BOOL LLOcclusionCullingGroup::earlyFail(LLCamera* camera, const LLVector4a* bounds) +{ + if (camera->getOrigin().isExactlyZero()) + { + return FALSE; + } + + const F32 vel = SG_OCCLUSION_FUDGE*2.f; + LLVector4a fudge; + fudge.splat(vel); + + const LLVector4a& c = bounds[0]; + LLVector4a r; + r.setAdd(bounds[1], fudge); + + /*if (r.magVecSquared() > 1024.0*1024.0) + { + return TRUE; + }*/ + + LLVector4a e; + e.load3(camera->getOrigin().mV); + + LLVector4a min; + min.setSub(c,r); + LLVector4a max; + max.setAdd(c,r); + + S32 lt = e.lessThan(min).getGatheredBits() & 0x7; + if (lt) + { + return FALSE; + } + + S32 gt = e.greaterThan(max).getGatheredBits() & 0x7; + if (gt) + { + return FALSE; + } + + return TRUE; +} + +U32 LLOcclusionCullingGroup::getLastOcclusionIssuedTime() +{ + return mOcclusionIssued[LLViewerCamera::sCurCameraID]; +} + +void LLOcclusionCullingGroup::checkOcclusion() +{ + if (LLPipeline::sUseOcclusion > 1) + { + LL_RECORD_BLOCK_TIME(FTM_OCCLUSION_READBACK); + LLOcclusionCullingGroup* parent = (LLOcclusionCullingGroup*)getParent(); + if (parent && parent->isOcclusionState(LLOcclusionCullingGroup::OCCLUDED)) + { //if the parent has been marked as occluded, the child is implicitly occluded + clearOcclusionState(QUERY_PENDING | DISCARD_QUERY); + } + else if (isOcclusionState(QUERY_PENDING)) + { //otherwise, if a query is pending, read it back + + GLuint available = 0; + if (mOcclusionQuery[LLViewerCamera::sCurCameraID]) + { + glGetQueryObjectuivARB(mOcclusionQuery[LLViewerCamera::sCurCameraID], GL_QUERY_RESULT_AVAILABLE_ARB, &available); + + static LLCachedControl<bool> wait_for_query(gSavedSettings, "RenderSynchronousOcclusion", true); + + if (wait_for_query && mOcclusionIssued[LLViewerCamera::sCurCameraID] < gFrameCount) + { //query was issued last frame, wait until it's available + S32 max_loop = 1024; + LL_RECORD_BLOCK_TIME(FTM_OCCLUSION_WAIT); + while (!available && max_loop-- > 0) + { + //do some usefu work while we wait + F32 max_time = llmin(gFrameIntervalSeconds.value()*10.f, 1.f); + LLAppViewer::instance()->updateTextureThreads(max_time); + + glGetQueryObjectuivARB(mOcclusionQuery[LLViewerCamera::sCurCameraID], GL_QUERY_RESULT_AVAILABLE_ARB, &available); + } + } + } + else + { + available = 1; + } + + if (available) + { //result is available, read it back, otherwise wait until next frame + GLuint res = 1; + if (!isOcclusionState(DISCARD_QUERY) && mOcclusionQuery[LLViewerCamera::sCurCameraID]) + { + glGetQueryObjectuivARB(mOcclusionQuery[LLViewerCamera::sCurCameraID], GL_QUERY_RESULT_ARB, &res); +#if LL_TRACK_PENDING_OCCLUSION_QUERIES + sPendingQueries.erase(mOcclusionQuery[LLViewerCamera::sCurCameraID]); +#endif + } + else if (mOcclusionQuery[LLViewerCamera::sCurCameraID]) + { //delete the query to avoid holding onto hundreds of pending queries + releaseOcclusionQueryObjectName(mOcclusionQuery[LLViewerCamera::sCurCameraID]); + mOcclusionQuery[LLViewerCamera::sCurCameraID] = 0; + } + + if (isOcclusionState(DISCARD_QUERY)) + { + res = 2; + } + + if (res > 0) + { + assert_states_valid(this); + clearOcclusionState(LLOcclusionCullingGroup::OCCLUDED, LLOcclusionCullingGroup::STATE_MODE_DIFF); + assert_states_valid(this); + } + else + { + assert_states_valid(this); + + setOcclusionState(LLOcclusionCullingGroup::OCCLUDED, LLOcclusionCullingGroup::STATE_MODE_DIFF); + + assert_states_valid(this); + } + + clearOcclusionState(QUERY_PENDING | DISCARD_QUERY); + } + } + else if (mSpatialPartition->isOcclusionEnabled() && isOcclusionState(LLOcclusionCullingGroup::OCCLUDED)) + { //check occlusion has been issued for occluded node that has not had a query issued + assert_states_valid(this); + clearOcclusionState(LLOcclusionCullingGroup::OCCLUDED, LLOcclusionCullingGroup::STATE_MODE_DIFF); + assert_states_valid(this); + } + } +} + +static LLTrace::BlockTimerStatHandle FTM_PUSH_OCCLUSION_VERTS("Push Occlusion"); +static LLTrace::BlockTimerStatHandle FTM_SET_OCCLUSION_STATE("Occlusion State"); +static LLTrace::BlockTimerStatHandle FTM_OCCLUSION_EARLY_FAIL("Occlusion Early Fail"); +static LLTrace::BlockTimerStatHandle FTM_OCCLUSION_ALLOCATE("Allocate"); +static LLTrace::BlockTimerStatHandle FTM_OCCLUSION_BUILD("Build"); +static LLTrace::BlockTimerStatHandle FTM_OCCLUSION_BEGIN_QUERY("Begin Query"); +static LLTrace::BlockTimerStatHandle FTM_OCCLUSION_END_QUERY("End Query"); +static LLTrace::BlockTimerStatHandle FTM_OCCLUSION_SET_BUFFER("Set Buffer"); +static LLTrace::BlockTimerStatHandle FTM_OCCLUSION_DRAW_WATER("Draw Water"); +static LLTrace::BlockTimerStatHandle FTM_OCCLUSION_DRAW("Draw"); + +void LLOcclusionCullingGroup::doOcclusion(LLCamera* camera, const LLVector4a* shift) +{ + if (mSpatialPartition->isOcclusionEnabled() && LLPipeline::sUseOcclusion > 1) + { + //move mBounds to the agent space if necessary + LLVector4a bounds[2]; + bounds[0] = mBounds[0]; + bounds[1] = mBounds[1]; + if(shift != NULL) + { + bounds[0].add(*shift); + } + + // Don't cull hole/edge water, unless we have the GL_ARB_depth_clamp extension + if (earlyFail(camera, bounds)) + { + LL_RECORD_BLOCK_TIME(FTM_OCCLUSION_EARLY_FAIL); + setOcclusionState(LLOcclusionCullingGroup::DISCARD_QUERY); + assert_states_valid(this); + clearOcclusionState(LLOcclusionCullingGroup::OCCLUDED, LLOcclusionCullingGroup::STATE_MODE_DIFF); + assert_states_valid(this); + } + else + { + if (!isOcclusionState(QUERY_PENDING) || isOcclusionState(DISCARD_QUERY)) + { + { //no query pending, or previous query to be discarded + LL_RECORD_BLOCK_TIME(FTM_RENDER_OCCLUSION); + + if (!mOcclusionQuery[LLViewerCamera::sCurCameraID]) + { + LL_RECORD_BLOCK_TIME(FTM_OCCLUSION_ALLOCATE); + mOcclusionQuery[LLViewerCamera::sCurCameraID] = getNewOcclusionQueryObjectName(); + } + + // Depth clamp all water to avoid it being culled as a result of being + // behind the far clip plane, and in the case of edge water to avoid + // it being culled while still visible. + bool const use_depth_clamp = gGLManager.mHasDepthClamp && + (mSpatialPartition->mDrawableType == LLDrawPool::POOL_WATER || + mSpatialPartition->mDrawableType == LLDrawPool::POOL_VOIDWATER); + + LLGLEnable clamp(use_depth_clamp ? GL_DEPTH_CLAMP : 0); + +#if !LL_DARWIN + U32 mode = gGLManager.mHasOcclusionQuery2 ? GL_ANY_SAMPLES_PASSED : GL_SAMPLES_PASSED_ARB; +#else + U32 mode = GL_SAMPLES_PASSED_ARB; +#endif + +#if LL_TRACK_PENDING_OCCLUSION_QUERIES + sPendingQueries.insert(mOcclusionQuery[LLViewerCamera::sCurCameraID]); +#endif + add(sOcclusionQueries, 1); + + { + LL_RECORD_BLOCK_TIME(FTM_PUSH_OCCLUSION_VERTS); + + //store which frame this query was issued on + mOcclusionIssued[LLViewerCamera::sCurCameraID] = gFrameCount; + + { + LL_RECORD_BLOCK_TIME(FTM_OCCLUSION_BEGIN_QUERY); + glBeginQueryARB(mode, mOcclusionQuery[LLViewerCamera::sCurCameraID]); + } + + LLGLSLShader* shader = LLGLSLShader::sCurBoundShaderPtr; + llassert(shader); + + shader->uniform3fv(LLShaderMgr::BOX_CENTER, 1, bounds[0].getF32ptr()); + shader->uniform3f(LLShaderMgr::BOX_SIZE, bounds[1][0]+SG_OCCLUSION_FUDGE, + bounds[1][1]+SG_OCCLUSION_FUDGE, + bounds[1][2]+SG_OCCLUSION_FUDGE); + + if (!use_depth_clamp && mSpatialPartition->mDrawableType == LLDrawPool::POOL_VOIDWATER) + { + LL_RECORD_BLOCK_TIME(FTM_OCCLUSION_DRAW_WATER); + + LLGLSquashToFarClip squash(glh_get_current_projection(), 1); + if (camera->getOrigin().isExactlyZero()) + { //origin is invalid, draw entire box + gPipeline.mCubeVB->drawRange(LLRender::TRIANGLE_FAN, 0, 7, 8, 0); + gPipeline.mCubeVB->drawRange(LLRender::TRIANGLE_FAN, 0, 7, 8, b111*8); + } + else + { + gPipeline.mCubeVB->drawRange(LLRender::TRIANGLE_FAN, 0, 7, 8, get_box_fan_indices(camera, bounds[0])); + } + } + else + { + LL_RECORD_BLOCK_TIME(FTM_OCCLUSION_DRAW); + if (camera->getOrigin().isExactlyZero()) + { //origin is invalid, draw entire box + gPipeline.mCubeVB->drawRange(LLRender::TRIANGLE_FAN, 0, 7, 8, 0); + gPipeline.mCubeVB->drawRange(LLRender::TRIANGLE_FAN, 0, 7, 8, b111*8); + } + else + { + gPipeline.mCubeVB->drawRange(LLRender::TRIANGLE_FAN, 0, 7, 8, get_box_fan_indices(camera, bounds[0])); + } + } + + + { + LL_RECORD_BLOCK_TIME(FTM_OCCLUSION_END_QUERY); + glEndQueryARB(mode); + } + } + } + + { + LL_RECORD_BLOCK_TIME(FTM_SET_OCCLUSION_STATE); + setOcclusionState(LLOcclusionCullingGroup::QUERY_PENDING); + clearOcclusionState(LLOcclusionCullingGroup::DISCARD_QUERY); + } + } + } + } +} +//------------------------------------------------------------------------------------------- +//end of occulsion culling functions and classes +//------------------------------------------------------------------------------------------- + +//----------------------------------------------------------------------------------- +//class LLViewerOctreePartition definitions +//----------------------------------------------------------------------------------- +LLViewerOctreePartition::LLViewerOctreePartition() : + mRegionp(NULL), + mOcclusionEnabled(TRUE), + mDrawableType(0), + mLODSeed(0), + mLODPeriod(1) +{ + LLVector4a center, size; + center.splat(0.f); + size.splat(1.f); + + mOctree = new OctreeRoot(center,size, NULL); +} + +LLViewerOctreePartition::~LLViewerOctreePartition() +{ + delete mOctree; + mOctree = NULL; +} + +BOOL LLViewerOctreePartition::isOcclusionEnabled() +{ + return mOcclusionEnabled || LLPipeline::sUseOcclusion > 2; +} + +//----------------------------------------------------------------------------------- +//class LLViewerOctreeCull definitions +//----------------------------------------------------------------------------------- + +//virtual +bool LLViewerOctreeCull::earlyFail(LLViewerOctreeGroup* group) +{ + return false; +} + +//virtual +void LLViewerOctreeCull::traverse(const OctreeNode* n) +{ + LLViewerOctreeGroup* group = (LLViewerOctreeGroup*) n->getListener(0); + + if (earlyFail(group)) + { + return; + } + + if (mRes == 2 || + (mRes && group->hasState(LLViewerOctreeGroup::SKIP_FRUSTUM_CHECK))) + { //fully in, just add everything + OctreeTraveler::traverse(n); + } + else + { + mRes = frustumCheck(group); + + if (mRes) + { //at least partially in, run on down + OctreeTraveler::traverse(n); + } + + mRes = 0; + } +} + +//------------------------------------------ +//agent space group culling +S32 LLViewerOctreeCull::AABBInFrustumNoFarClipGroupBounds(const LLViewerOctreeGroup* group) +{ + return mCamera->AABBInFrustumNoFarClip(group->mBounds[0], group->mBounds[1]); +} + +S32 LLViewerOctreeCull::AABBSphereIntersectGroupExtents(const LLViewerOctreeGroup* group) +{ + return AABBSphereIntersect(group->mExtents[0], group->mExtents[1], mCamera->getOrigin(), mCamera->mFrustumCornerDist); +} + +S32 LLViewerOctreeCull::AABBInFrustumGroupBounds(const LLViewerOctreeGroup* group) +{ + return mCamera->AABBInFrustum(group->mBounds[0], group->mBounds[1]); +} +//------------------------------------------ + +//------------------------------------------ +//agent space object set culling +S32 LLViewerOctreeCull::AABBInFrustumNoFarClipObjectBounds(const LLViewerOctreeGroup* group) +{ + return mCamera->AABBInFrustumNoFarClip(group->mObjectBounds[0], group->mObjectBounds[1]); +} + +S32 LLViewerOctreeCull::AABBSphereIntersectObjectExtents(const LLViewerOctreeGroup* group) +{ + return AABBSphereIntersect(group->mObjectExtents[0], group->mObjectExtents[1], mCamera->getOrigin(), mCamera->mFrustumCornerDist); +} + +S32 LLViewerOctreeCull::AABBInFrustumObjectBounds(const LLViewerOctreeGroup* group) +{ + return mCamera->AABBInFrustum(group->mObjectBounds[0], group->mObjectBounds[1]); +} +//------------------------------------------ + +//------------------------------------------ +//local regional space group culling +S32 LLViewerOctreeCull::AABBInRegionFrustumNoFarClipGroupBounds(const LLViewerOctreeGroup* group) +{ + return mCamera->AABBInRegionFrustumNoFarClip(group->mBounds[0], group->mBounds[1]); +} + +S32 LLViewerOctreeCull::AABBInRegionFrustumGroupBounds(const LLViewerOctreeGroup* group) +{ + return mCamera->AABBInRegionFrustum(group->mBounds[0], group->mBounds[1]); +} + +S32 LLViewerOctreeCull::AABBRegionSphereIntersectGroupExtents(const LLViewerOctreeGroup* group, const LLVector3& shift) +{ + return AABBSphereIntersect(group->mExtents[0], group->mExtents[1], mCamera->getOrigin() - shift, mCamera->mFrustumCornerDist); +} +//------------------------------------------ + +//------------------------------------------ +//local regional space object culling +S32 LLViewerOctreeCull::AABBInRegionFrustumObjectBounds(const LLViewerOctreeGroup* group) +{ + return mCamera->AABBInRegionFrustum(group->mObjectBounds[0], group->mObjectBounds[1]); +} + +S32 LLViewerOctreeCull::AABBInRegionFrustumNoFarClipObjectBounds(const LLViewerOctreeGroup* group) +{ + return mCamera->AABBInRegionFrustumNoFarClip(group->mObjectBounds[0], group->mObjectBounds[1]); +} + +S32 LLViewerOctreeCull::AABBRegionSphereIntersectObjectExtents(const LLViewerOctreeGroup* group, const LLVector3& shift) +{ + return AABBSphereIntersect(group->mObjectExtents[0], group->mObjectExtents[1], mCamera->getOrigin() - shift, mCamera->mFrustumCornerDist); +} +//------------------------------------------ +//check if the objects projection large enough + +bool LLViewerOctreeCull::checkProjectionArea(const LLVector4a& center, const LLVector4a& size, const LLVector3& shift, F32 pixel_threshold, F32 near_radius) +{ + LLVector3 local_orig = mCamera->getOrigin() - shift; + LLVector4a origin; + origin.load3(local_orig.mV); + + LLVector4a lookAt; + lookAt.setSub(center, origin); + F32 distance = lookAt.getLength3().getF32(); + if(distance <= near_radius) + { + return true; //always load close-by objects + } + + // treat object as if it were near_radius meters closer than it actually was. + // this allows us to get some temporal coherence on visibility...objects that can be reached quickly will tend to be visible + distance -= near_radius; + + F32 squared_rad = size.dot3(size).getF32(); + return squared_rad / distance > pixel_threshold; +} + +//virtual +bool LLViewerOctreeCull::checkObjects(const OctreeNode* branch, const LLViewerOctreeGroup* group) +{ + if (branch->getElementCount() == 0) //no elements + { + return false; + } + else if (branch->getChildCount() == 0) //leaf state, already checked tightest bounding box + { + return true; + } + else if (mRes == 1 && !frustumCheckObjects(group)) //no objects in frustum + { + return false; + } + + return true; +} + +//virtual +void LLViewerOctreeCull::preprocess(LLViewerOctreeGroup* group) +{ +} + +//virtual +void LLViewerOctreeCull::processGroup(LLViewerOctreeGroup* group) +{ +} + +//virtual +void LLViewerOctreeCull::visit(const OctreeNode* branch) +{ + LLViewerOctreeGroup* group = (LLViewerOctreeGroup*) branch->getListener(0); + + preprocess(group); + + if (checkObjects(branch, group)) + { + processGroup(group); + } +} + +//-------------------------------------------------------------- +//class LLViewerOctreeDebug +//virtual +void LLViewerOctreeDebug::visit(const OctreeNode* branch) +{ +#if 0 + LL_INFOS() << "Node: " << (U32)branch << " # Elements: " << branch->getElementCount() << " # Children: " << branch->getChildCount() << LL_ENDL; + for (U32 i = 0; i < branch->getChildCount(); i++) + { + LL_INFOS() << "Child " << i << " : " << (U32)branch->getChild(i) << LL_ENDL; + } +#endif + LLViewerOctreeGroup* group = (LLViewerOctreeGroup*) branch->getListener(0); + processGroup(group); +} + +//virtual +void LLViewerOctreeDebug::processGroup(LLViewerOctreeGroup* group) +{ +#if 0 + const LLVector4a* vec4 = group->getBounds(); + LLVector3 vec[2]; + vec[0].set(vec4[0].getF32ptr()); + vec[1].set(vec4[1].getF32ptr()); + LL_INFOS() << "Bounds: " << vec[0] << " : " << vec[1] << LL_ENDL; + + vec4 = group->getExtents(); + vec[0].set(vec4[0].getF32ptr()); + vec[1].set(vec4[1].getF32ptr()); + LL_INFOS() << "Extents: " << vec[0] << " : " << vec[1] << LL_ENDL; + + vec4 = group->getObjectBounds(); + vec[0].set(vec4[0].getF32ptr()); + vec[1].set(vec4[1].getF32ptr()); + LL_INFOS() << "ObjectBounds: " << vec[0] << " : " << vec[1] << LL_ENDL; + + vec4 = group->getObjectExtents(); + vec[0].set(vec4[0].getF32ptr()); + vec[1].set(vec4[1].getF32ptr()); + LL_INFOS() << "ObjectExtents: " << vec[0] << " : " << vec[1] << LL_ENDL; +#endif +} +//-------------------------------------------------------------- |