7bb160d27f
Change the osg::NodeVisitor::getLocalToWorldMatrix() / getWorldToLocalMatrix() methods so it do not initilize the matrix being passed to them, and assume the the users has already initiliazed them appropriately, such as to take account of camera positions.
124 lines
3.2 KiB
C++
124 lines
3.2 KiB
C++
#include <osg/NodeVisitor>
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#include <osg/Transform>
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#include <stdlib.h>
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using namespace osg;
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NodeVisitor::NodeVisitor(TraversalMode tm)
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{
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_traversalNumber = -1;
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_traversalVisitor = NULL;
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_traversalMode = tm;
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_traversalMask = 0xffffffff;
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_nodeMaskOverride = 0x0;
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}
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NodeVisitor::~NodeVisitor()
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{
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// if (_traversalVisitor) detach from _traversalVisitor;
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}
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void NodeVisitor::setTraversalMode(const TraversalMode mode)
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{
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if (_traversalMode==mode) return;
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if (mode==TRAVERSE_VISITOR)
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{
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if (_traversalVisitor==NULL) _traversalMode = TRAVERSE_NONE;
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else _traversalMode = TRAVERSE_VISITOR;
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}
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else
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{
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if (_traversalVisitor.valid()) _traversalVisitor=NULL;
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_traversalMode = mode;
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}
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}
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void NodeVisitor::setTraversalVisitor(NodeVisitor* nv)
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{
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if (_traversalVisitor==nv) return;
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_traversalVisitor = nv;
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if (_traversalVisitor.valid()) _traversalMode = TRAVERSE_VISITOR;
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else _traversalMode = TRAVERSE_NONE;
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}
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class TransformVisitor : public NodeVisitor
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{
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public:
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enum CoordMode
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{
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WORLD_TO_LOCAL,
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LOCAL_TO_WORLD
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};
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MatrixMode _matrixMode;
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CoordMode _coordMode;
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Matrix& _matrix;
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NodeVisitor* _nodeVisitor;
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TransformVisitor(Matrix& matrix,MatrixMode matrixMode,CoordMode coordMode,NodeVisitor* nv):
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NodeVisitor(),
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_matrixMode(matrixMode),
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_coordMode(coordMode),
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_matrix(matrix),
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_nodeVisitor(nv)
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{}
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virtual void apply(Transform& transform)
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{
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bool applyTransform =
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(_matrixMode==transform.getMatrixMode()) ||
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(_matrixMode==MODELVIEW && (transform.getMatrixMode()==MODEL || transform.getMatrixMode()==VIEW));
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if (applyTransform)
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{
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if (_coordMode==LOCAL_TO_WORLD)
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{
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osg::Matrix localToWorldMat;
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transform.getLocalToWorldMatrix(localToWorldMat,_nodeVisitor);
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_matrix.preMult(localToWorldMat);
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}
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else // worldToLocal
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{
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osg::Matrix worldToLocalMat;
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transform.getWorldToLocalMatrix(worldToLocalMat,_nodeVisitor);
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_matrix.postMult(worldToLocalMat);
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}
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}
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}
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};
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const bool NodeVisitor::getLocalToWorldMatrix(Matrix& matrix, MatrixMode mode, Node* node)
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{
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TransformVisitor tv(matrix,mode,TransformVisitor::LOCAL_TO_WORLD,this);
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for(NodePath::iterator itr=_nodePath.begin();
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itr!=_nodePath.end();
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++itr)
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{
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if (*itr==node) return true; // don't account for matrix attached to specofied node
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(*itr)->accept(tv);
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}
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return true;
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}
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const bool NodeVisitor::getWorldToLocalMatrix(Matrix& matrix, MatrixMode mode, Node* node)
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{
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TransformVisitor tv(matrix,mode,TransformVisitor::WORLD_TO_LOCAL,this);
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for(NodePath::iterator itr=_nodePath.begin();
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itr!=_nodePath.end();
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++itr)
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{
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if (*itr==node) return true; // don't account for matrix attached to specofied node
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(*itr)->accept(tv);
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}
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return true;
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}
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