/* ----------------------------------------------------------------------------- This source file is part of OGRE (Object-oriented Graphics Rendering Engine) For the latest info, see http://www.ogre3d.org/ Copyright (c) 2000-2009 Torus Knot Software Ltd Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ----------------------------------------------------------------------------- */ #include "OgreStableHeaders.h" #include "OgreNode.h" #include "OgreException.h" #include "OgreMath.h" // Dependencies on render-related types due to ability to render node #include "OgreMaterialManager.h" #include "OgreMeshManager.h" #include "OgreMesh.h" #include "OgreSubMesh.h" #include "OgreCamera.h" #include "OgreTechnique.h" #include "OgrePass.h" #include "OgreManualObject.h" namespace Ogre { NameGenerator Node::msNameGenerator("Unnamed_"); Node::QueuedUpdates Node::msQueuedUpdates; //----------------------------------------------------------------------- Node::Node() :mParent(0), mNeedParentUpdate(false), mNeedChildUpdate(false), mParentNotified(false), mQueuedForUpdate(false), mOrientation(Quaternion::IDENTITY), mPosition(Vector3::ZERO), mScale(Vector3::UNIT_SCALE), mInheritOrientation(true), mInheritScale(true), mDerivedOrientation(Quaternion::IDENTITY), mDerivedPosition(Vector3::ZERO), mDerivedScale(Vector3::UNIT_SCALE), mInitialPosition(Vector3::ZERO), mInitialOrientation(Quaternion::IDENTITY), mInitialScale(Vector3::UNIT_SCALE), mCachedTransformOutOfDate(true), mListener(0), mDebug(0) { // Generate a name mName = msNameGenerator.generate(); needUpdate(); } //----------------------------------------------------------------------- Node::Node(const String& name) : mParent(0), mNeedParentUpdate(false), mNeedChildUpdate(false), mParentNotified(false), mQueuedForUpdate(false), mName(name), mOrientation(Quaternion::IDENTITY), mPosition(Vector3::ZERO), mScale(Vector3::UNIT_SCALE), mInheritOrientation(true), mInheritScale(true), mDerivedOrientation(Quaternion::IDENTITY), mDerivedPosition(Vector3::ZERO), mDerivedScale(Vector3::UNIT_SCALE), mInitialPosition(Vector3::ZERO), mInitialOrientation(Quaternion::IDENTITY), mInitialScale(Vector3::UNIT_SCALE), mCachedTransformOutOfDate(true), mListener(0), mDebug(0) { needUpdate(); } //----------------------------------------------------------------------- Node::~Node() { OGRE_DELETE mDebug; mDebug = 0; // Call listener (note, only called if there's something to do) if (mListener) { mListener->nodeDestroyed(this); } removeAllChildren(); if(mParent) mParent->removeChild(this); if (mQueuedForUpdate) { // Erase from queued updates QueuedUpdates::iterator it = std::find(msQueuedUpdates.begin(), msQueuedUpdates.end(), this); assert(it != msQueuedUpdates.end()); if (it != msQueuedUpdates.end()) { // Optimised algorithm to erase an element from unordered vector. *it = msQueuedUpdates.back(); msQueuedUpdates.pop_back(); } } } //----------------------------------------------------------------------- Node* Node::getParent(void) const { return mParent; } //----------------------------------------------------------------------- void Node::setParent(Node* parent) { bool different = (parent != mParent); mParent = parent; // Request update from parent mParentNotified = false ; needUpdate(); // Call listener (note, only called if there's something to do) if (mListener && different) { if (mParent) mListener->nodeAttached(this); else mListener->nodeDetached(this); } } //----------------------------------------------------------------------- const Matrix4& Node::_getFullTransform(void) const { if (mCachedTransformOutOfDate) { // Use derived values mCachedTransform.makeTransform( _getDerivedPosition(), _getDerivedScale(), _getDerivedOrientation()); mCachedTransformOutOfDate = false; } return mCachedTransform; } //----------------------------------------------------------------------- void Node::_update(bool updateChildren, bool parentHasChanged) { // always clear information about parent notification mParentNotified = false ; // Short circuit the off case if (!updateChildren && !mNeedParentUpdate && !mNeedChildUpdate && !parentHasChanged ) { return; } // See if we should process everyone if (mNeedParentUpdate || parentHasChanged) { // Update transforms from parent _updateFromParent(); } if (mNeedChildUpdate || parentHasChanged) { ChildNodeMap::iterator it, itend; itend = mChildren.end(); for (it = mChildren.begin(); it != itend; ++it) { Node* child = it->second; child->_update(true, true); } mChildrenToUpdate.clear(); } else { // Just update selected children ChildUpdateSet::iterator it, itend; itend = mChildrenToUpdate.end(); for(it = mChildrenToUpdate.begin(); it != itend; ++it) { Node* child = *it; child->_update(true, false); } mChildrenToUpdate.clear(); } mNeedChildUpdate = false; } //----------------------------------------------------------------------- void Node::_updateFromParent(void) const { updateFromParentImpl(); // Call listener (note, this method only called if there's something to do) if (mListener) { mListener->nodeUpdated(this); } } //----------------------------------------------------------------------- void Node::updateFromParentImpl(void) const { if (mParent) { // Update orientation const Quaternion& parentOrientation = mParent->_getDerivedOrientation(); if (mInheritOrientation) { // Combine orientation with that of parent mDerivedOrientation = parentOrientation * mOrientation; } else { // No inheritance mDerivedOrientation = mOrientation; } // Update scale const Vector3& parentScale = mParent->_getDerivedScale(); if (mInheritScale) { // Scale own position by parent scale, NB just combine // as equivalent axes, no shearing mDerivedScale = parentScale * mScale; } else { // No inheritance mDerivedScale = mScale; } // Change position vector based on parent's orientation & scale mDerivedPosition = parentOrientation * (parentScale * mPosition); // Add altered position vector to parents mDerivedPosition += mParent->_getDerivedPosition(); } else { // Root node, no parent mDerivedOrientation = mOrientation; mDerivedPosition = mPosition; mDerivedScale = mScale; } mCachedTransformOutOfDate = true; mNeedParentUpdate = false; } //----------------------------------------------------------------------- Node* Node::createChild(const Vector3& inTranslate, const Quaternion& inRotate) { Node* newNode = createChildImpl(); newNode->translate(inTranslate); newNode->rotate(inRotate); this->addChild(newNode); return newNode; } //----------------------------------------------------------------------- Node* Node::createChild(const String& name, const Vector3& inTranslate, const Quaternion& inRotate) { Node* newNode = createChildImpl(name); newNode->translate(inTranslate); newNode->rotate(inRotate); this->addChild(newNode); return newNode; } //----------------------------------------------------------------------- void Node::addChild(Node* child) { if (child->mParent) { OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "Node '" + child->getName() + "' already was a child of '" + child->mParent->getName() + "'.", "Node::addChild"); } mChildren.insert(ChildNodeMap::value_type(child->getName(), child)); child->setParent(this); } //----------------------------------------------------------------------- unsigned short Node::numChildren(void) const { return static_cast< unsigned short >( mChildren.size() ); } //----------------------------------------------------------------------- Node* Node::getChild(unsigned short index) const { if( index < mChildren.size() ) { ChildNodeMap::const_iterator i = mChildren.begin(); while (index--) ++i; return i->second; } else return NULL; } //----------------------------------------------------------------------- Node* Node::removeChild(unsigned short index) { Node* ret; if (index < mChildren.size()) { ChildNodeMap::iterator i = mChildren.begin(); while (index--) ++i; ret = i->second; // cancel any pending update cancelUpdate(ret); mChildren.erase(i); ret->setParent(NULL); return ret; } else { OGRE_EXCEPT( Exception::ERR_INVALIDPARAMS, "Child index out of bounds.", "Node::getChild" ); } return 0; } //----------------------------------------------------------------------- Node* Node::removeChild(Node* child) { if (child) { ChildNodeMap::iterator i = mChildren.find(child->getName()); // ensure it's our child if (i != mChildren.end() && i->second == child) { // cancel any pending update cancelUpdate(child); mChildren.erase(i); child->setParent(NULL); } } return child; } //----------------------------------------------------------------------- const Quaternion& Node::getOrientation() const { return mOrientation; } //----------------------------------------------------------------------- void Node::setOrientation( const Quaternion & q ) { assert(!q.isNaN() && "Invalid orientation supplied as parameter"); mOrientation = q; mOrientation.normalise(); needUpdate(); } //----------------------------------------------------------------------- void Node::setOrientation( Real w, Real x, Real y, Real z) { setOrientation(Quaternion(w, x, y, z)); } //----------------------------------------------------------------------- void Node::resetOrientation(void) { mOrientation = Quaternion::IDENTITY; needUpdate(); } //----------------------------------------------------------------------- void Node::setPosition(const Vector3& pos) { assert(!pos.isNaN() && "Invalid vector supplied as parameter"); mPosition = pos; needUpdate(); } //----------------------------------------------------------------------- void Node::setPosition(Real x, Real y, Real z) { Vector3 v(x,y,z); setPosition(v); } //----------------------------------------------------------------------- const Vector3 & Node::getPosition(void) const { return mPosition; } //----------------------------------------------------------------------- Matrix3 Node::getLocalAxes(void) const { Vector3 axisX = Vector3::UNIT_X; Vector3 axisY = Vector3::UNIT_Y; Vector3 axisZ = Vector3::UNIT_Z; axisX = mOrientation * axisX; axisY = mOrientation * axisY; axisZ = mOrientation * axisZ; return Matrix3(axisX.x, axisY.x, axisZ.x, axisX.y, axisY.y, axisZ.y, axisX.z, axisY.z, axisZ.z); } //----------------------------------------------------------------------- void Node::translate(const Vector3& d, TransformSpace relativeTo) { switch(relativeTo) { case TS_LOCAL: // position is relative to parent so transform downwards mPosition += mOrientation * d; break; case TS_WORLD: // position is relative to parent so transform upwards if (mParent) { mPosition += (mParent->_getDerivedOrientation().Inverse() * d) / mParent->_getDerivedScale(); } else { mPosition += d; } break; case TS_PARENT: mPosition += d; break; } needUpdate(); } //----------------------------------------------------------------------- void Node::translate(Real x, Real y, Real z, TransformSpace relativeTo) { Vector3 v(x,y,z); translate(v, relativeTo); } //----------------------------------------------------------------------- void Node::translate(const Matrix3& axes, const Vector3& move, TransformSpace relativeTo) { Vector3 derived = axes * move; translate(derived, relativeTo); } //----------------------------------------------------------------------- void Node::translate(const Matrix3& axes, Real x, Real y, Real z, TransformSpace relativeTo) { Vector3 d(x,y,z); translate(axes,d,relativeTo); } //----------------------------------------------------------------------- void Node::roll(const Radian& angle, TransformSpace relativeTo) { rotate(Vector3::UNIT_Z, angle, relativeTo); } //----------------------------------------------------------------------- void Node::pitch(const Radian& angle, TransformSpace relativeTo) { rotate(Vector3::UNIT_X, angle, relativeTo); } //----------------------------------------------------------------------- void Node::yaw(const Radian& angle, TransformSpace relativeTo) { rotate(Vector3::UNIT_Y, angle, relativeTo); } //----------------------------------------------------------------------- void Node::rotate(const Vector3& axis, const Radian& angle, TransformSpace relativeTo) { Quaternion q; q.FromAngleAxis(angle,axis); rotate(q, relativeTo); } //----------------------------------------------------------------------- void Node::rotate(const Quaternion& q, TransformSpace relativeTo) { // Normalise quaternion to avoid drift Quaternion qnorm = q; qnorm.normalise(); switch(relativeTo) { case TS_PARENT: // Rotations are normally relative to local axes, transform up mOrientation = qnorm * mOrientation; break; case TS_WORLD: // Rotations are normally relative to local axes, transform up mOrientation = mOrientation * _getDerivedOrientation().Inverse() * qnorm * _getDerivedOrientation(); break; case TS_LOCAL: // Note the order of the mult, i.e. q comes after mOrientation = mOrientation * qnorm; break; } needUpdate(); } //----------------------------------------------------------------------- void Node::_setDerivedPosition( const Vector3& pos ) { //find where the node would end up in parent's local space setPosition( mParent->convertWorldToLocalPosition( pos ) ); } //----------------------------------------------------------------------- void Node::_setDerivedOrientation( const Quaternion& q ) { //find where the node would end up in parent's local space setOrientation( mParent->convertWorldToLocalOrientation( q ) ); } //----------------------------------------------------------------------- const Quaternion & Node::_getDerivedOrientation(void) const { if (mNeedParentUpdate) { _updateFromParent(); } return mDerivedOrientation; } //----------------------------------------------------------------------- const Vector3 & Node::_getDerivedPosition(void) const { if (mNeedParentUpdate) { _updateFromParent(); } return mDerivedPosition; } //----------------------------------------------------------------------- const Vector3 & Node::_getDerivedScale(void) const { if (mNeedParentUpdate) { _updateFromParent(); } return mDerivedScale; } //----------------------------------------------------------------------- Vector3 Node::convertWorldToLocalPosition( const Vector3 &worldPos ) { if (mNeedParentUpdate) { _updateFromParent(); } return mDerivedOrientation.Inverse() * (worldPos - mDerivedPosition) / mDerivedScale; } //----------------------------------------------------------------------- Vector3 Node::convertLocalToWorldPosition( const Vector3 &localPos ) { if (mNeedParentUpdate) { _updateFromParent(); } return (mDerivedOrientation * localPos * mDerivedScale) + mDerivedPosition; } //----------------------------------------------------------------------- Quaternion Node::convertWorldToLocalOrientation( const Quaternion &worldOrientation ) { if (mNeedParentUpdate) { _updateFromParent(); } return mDerivedOrientation.Inverse() * worldOrientation; } //----------------------------------------------------------------------- Quaternion Node::convertLocalToWorldOrientation( const Quaternion &localOrientation ) { if (mNeedParentUpdate) { _updateFromParent(); } return mDerivedOrientation * localOrientation; } //----------------------------------------------------------------------- void Node::removeAllChildren(void) { ChildNodeMap::iterator i, iend; iend = mChildren.end(); for (i = mChildren.begin(); i != iend; ++i) { i->second->setParent(0); } mChildren.clear(); mChildrenToUpdate.clear(); } //----------------------------------------------------------------------- void Node::setScale(const Vector3& inScale) { assert(!inScale.isNaN() && "Invalid vector supplied as parameter"); mScale = inScale; needUpdate(); } //----------------------------------------------------------------------- void Node::setScale(Real x, Real y, Real z) { setScale(Vector3(x, y, z)); } //----------------------------------------------------------------------- const Vector3 & Node::getScale(void) const { return mScale; } //----------------------------------------------------------------------- void Node::setInheritOrientation(bool inherit) { mInheritOrientation = inherit; needUpdate(); } //----------------------------------------------------------------------- bool Node::getInheritOrientation(void) const { return mInheritOrientation; } //----------------------------------------------------------------------- void Node::setInheritScale(bool inherit) { mInheritScale = inherit; needUpdate(); } //----------------------------------------------------------------------- bool Node::getInheritScale(void) const { return mInheritScale; } //----------------------------------------------------------------------- void Node::scale(const Vector3& inScale) { mScale = mScale * inScale; needUpdate(); } //----------------------------------------------------------------------- void Node::scale(Real x, Real y, Real z) { mScale.x *= x; mScale.y *= y; mScale.z *= z; needUpdate(); } //----------------------------------------------------------------------- const String& Node::getName(void) const { return mName; } //----------------------------------------------------------------------- void Node::setInitialState(void) { mInitialPosition = mPosition; mInitialOrientation = mOrientation; mInitialScale = mScale; } //----------------------------------------------------------------------- void Node::resetToInitialState(void) { mPosition = mInitialPosition; mOrientation = mInitialOrientation; mScale = mInitialScale; needUpdate(); } //----------------------------------------------------------------------- const Vector3& Node::getInitialPosition(void) const { return mInitialPosition; } //----------------------------------------------------------------------- const Quaternion& Node::getInitialOrientation(void) const { return mInitialOrientation; } //----------------------------------------------------------------------- const Vector3& Node::getInitialScale(void) const { return mInitialScale; } //----------------------------------------------------------------------- Node* Node::getChild(const String& name) const { ChildNodeMap::const_iterator i = mChildren.find(name); if (i == mChildren.end()) { OGRE_EXCEPT(Exception::ERR_ITEM_NOT_FOUND, "Child node named " + name + " does not exist.", "Node::getChild"); } return i->second; } //----------------------------------------------------------------------- Node* Node::removeChild(const String& name) { ChildNodeMap::iterator i = mChildren.find(name); if (i == mChildren.end()) { OGRE_EXCEPT(Exception::ERR_ITEM_NOT_FOUND, "Child node named " + name + " does not exist.", "Node::removeChild"); } Node* ret = i->second; // Cancel any pending update cancelUpdate(ret); mChildren.erase(i); ret->setParent(NULL); return ret; } //----------------------------------------------------------------------- Node::ChildNodeIterator Node::getChildIterator(void) { return ChildNodeIterator(mChildren.begin(), mChildren.end()); } //----------------------------------------------------------------------- Node::ConstChildNodeIterator Node::getChildIterator(void) const { return ConstChildNodeIterator(mChildren.begin(), mChildren.end()); } //----------------------------------------------------------------------- Real Node::getSquaredViewDepth(const Camera* cam) const { Vector3 diff = _getDerivedPosition() - cam->getDerivedPosition(); // NB use squared length rather than real depth to avoid square root return diff.squaredLength(); } //----------------------------------------------------------------------- void Node::needUpdate(bool forceParentUpdate) { mNeedParentUpdate = true; mNeedChildUpdate = true; mCachedTransformOutOfDate = true; // Make sure we're not root and parent hasn't been notified before if (mParent && (!mParentNotified || forceParentUpdate)) { mParent->requestUpdate(this, forceParentUpdate); mParentNotified = true ; } // all children will be updated mChildrenToUpdate.clear(); } //----------------------------------------------------------------------- void Node::requestUpdate(Node* child, bool forceParentUpdate) { // If we're already going to update everything this doesn't matter if (mNeedChildUpdate) { return; } mChildrenToUpdate.insert(child); // Request selective update of me, if we didn't do it before if (mParent && (!mParentNotified || forceParentUpdate)) { mParent->requestUpdate(this, forceParentUpdate); mParentNotified = true ; } } //----------------------------------------------------------------------- void Node::cancelUpdate(Node* child) { mChildrenToUpdate.erase(child); // Propagate this up if we're done if (mChildrenToUpdate.empty() && mParent && !mNeedChildUpdate) { mParent->cancelUpdate(this); mParentNotified = false ; } } //----------------------------------------------------------------------- void Node::queueNeedUpdate(Node* n) { // Don't queue the node more than once if (!n->mQueuedForUpdate) { n->mQueuedForUpdate = true; msQueuedUpdates.push_back(n); } } //----------------------------------------------------------------------- void Node::processQueuedUpdates(void) { for (QueuedUpdates::iterator i = msQueuedUpdates.begin(); i != msQueuedUpdates.end(); ++i) { // Update, and force parent update since chances are we've ended // up with some mixed state in there due to re-entrancy Node* n = *i; n->mQueuedForUpdate = false; n->needUpdate(true); } msQueuedUpdates.clear(); } //--------------------------------------------------------------------- Node::DebugRenderable* Node::getDebugRenderable(Real scaling) { if (!mDebug) { mDebug = OGRE_NEW DebugRenderable(this); } mDebug->setScaling(scaling); return mDebug; } //--------------------------------------------------------------------- //----------------------------------------------------------------------- Node::DebugRenderable::DebugRenderable(Node* parent) : mParent(parent) { String matName = "Ogre/Debug/AxesMat"; mMat = MaterialManager::getSingleton().getByName(matName); if (mMat.isNull()) { mMat = MaterialManager::getSingleton().create(matName, ResourceGroupManager::INTERNAL_RESOURCE_GROUP_NAME); Pass* p = mMat->getTechnique(0)->getPass(0); p->setLightingEnabled(false); p->setPolygonModeOverrideable(false); p->setVertexColourTracking(TVC_AMBIENT); p->setSceneBlending(SBT_TRANSPARENT_ALPHA); p->setCullingMode(CULL_NONE); p->setDepthWriteEnabled(false); } String meshName = "Ogre/Debug/AxesMesh"; mMeshPtr = MeshManager::getSingleton().getByName(meshName); if (mMeshPtr.isNull()) { ManualObject mo("tmp"); mo.begin(mMat->getName()); /* 3 axes, each made up of 2 of these (base plane = XY) * .------------|\ * '------------|/ */ mo.estimateVertexCount(7 * 2 * 3); mo.estimateIndexCount(3 * 2 * 3); Quaternion quat[6]; ColourValue col[3]; // x-axis quat[0] = Quaternion::IDENTITY; quat[1].FromAxes(Vector3::UNIT_X, Vector3::NEGATIVE_UNIT_Z, Vector3::UNIT_Y); col[0] = ColourValue::Red; col[0].a = 0.8; // y-axis quat[2].FromAxes(Vector3::UNIT_Y, Vector3::NEGATIVE_UNIT_X, Vector3::UNIT_Z); quat[3].FromAxes(Vector3::UNIT_Y, Vector3::UNIT_Z, Vector3::UNIT_X); col[1] = ColourValue::Green; col[1].a = 0.8; // z-axis quat[4].FromAxes(Vector3::UNIT_Z, Vector3::UNIT_Y, Vector3::NEGATIVE_UNIT_X); quat[5].FromAxes(Vector3::UNIT_Z, Vector3::UNIT_X, Vector3::UNIT_Y); col[2] = ColourValue::Blue; col[2].a = 0.8; Vector3 basepos[7] = { // stalk Vector3(0, 0.05, 0), Vector3(0, -0.05, 0), Vector3(0.7, -0.05, 0), Vector3(0.7, 0.05, 0), // head Vector3(0.7, -0.15, 0), Vector3(1, 0, 0), Vector3(0.7, 0.15, 0) }; // vertices // 6 arrows for (size_t i = 0; i < 6; ++i) { // 7 points for (size_t p = 0; p < 7; ++p) { Vector3 pos = quat[i] * basepos[p]; mo.position(pos); mo.colour(col[i / 2]); } } // indices // 6 arrows for (size_t i = 0; i < 6; ++i) { size_t base = i * 7; mo.triangle(base + 0, base + 1, base + 2); mo.triangle(base + 0, base + 2, base + 3); mo.triangle(base + 4, base + 5, base + 6); } mo.end(); mMeshPtr = mo.convertToMesh(meshName, ResourceGroupManager::INTERNAL_RESOURCE_GROUP_NAME); } } //--------------------------------------------------------------------- Node::DebugRenderable::~DebugRenderable() { } //----------------------------------------------------------------------- const MaterialPtr& Node::DebugRenderable::getMaterial(void) const { return mMat; } //--------------------------------------------------------------------- void Node::DebugRenderable::getRenderOperation(RenderOperation& op) { return mMeshPtr->getSubMesh(0)->_getRenderOperation(op); } //----------------------------------------------------------------------- void Node::DebugRenderable::getWorldTransforms(Matrix4* xform) const { // Assumes up to date *xform = mParent->_getFullTransform(); if (!Math::RealEqual(mScaling, 1.0)) { Matrix4 m = Matrix4::IDENTITY; Vector3 s(mScaling, mScaling, mScaling); m.setScale(s); *xform = (*xform) * m; } } //----------------------------------------------------------------------- Real Node::DebugRenderable::getSquaredViewDepth(const Camera* cam) const { return mParent->getSquaredViewDepth(cam); } //----------------------------------------------------------------------- const LightList& Node::DebugRenderable::getLights(void) const { // Nodes should not be lit by the scene, this will not get called static LightList ll; return ll; } }