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Added support in osg::computeWorldToLocal and compteLocalToWorld functions for automatically

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stripping any absolute or root CameraNode's from the NodePaths.

Added osg::Node::getWorldMatrices() convinience method.
This commit is contained in:
Robert Osfield
2006-02-27 19:48:34 +00:00
parent 8f2ffb7c2d
commit 1dcf4fe81f
4 changed files with 79 additions and 19 deletions
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57
src/osg/Transform.cpp
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@@ -11,6 +11,9 @@
* OpenSceneGraph Public License for more details.
*/
#include <osg/Transform>
#include <osg/CameraNode>
#include <osg/Notify>
using namespace osg;
@@ -27,11 +30,13 @@ class TransformVisitor : public NodeVisitor
CoordMode _coordMode;
Matrix& _matrix;
bool _ignoreCameraNodes;
TransformVisitor(Matrix& matrix,CoordMode coordMode):
TransformVisitor(Matrix& matrix,CoordMode coordMode, bool ignoreCameraNodes):
NodeVisitor(),
_coordMode(coordMode),
_matrix(matrix)
_matrix(matrix),
_ignoreCameraNodes(ignoreCameraNodes)
{}
virtual void apply(Transform& transform)
@@ -48,46 +53,68 @@ class TransformVisitor : public NodeVisitor
void accumulate(const NodePath& nodePath)
{
NodePath& non_const_nodePath = const_cast<NodePath&>(nodePath);
for(NodePath::iterator itr=non_const_nodePath.begin();
itr!=non_const_nodePath.end();
++itr)
if (nodePath.empty()) return;
unsigned int i = 0;
if (_ignoreCameraNodes)
{
(*itr)->accept(*this);
// we need to found out the last absolute CameraNode in NodePath and
// set the i index to after it so the final accumulation set ignores it.
i = nodePath.size();
NodePath::const_reverse_iterator ritr;
for(ritr = nodePath.rbegin();
ritr != nodePath.rend();
++ritr, --i)
{
const osg::CameraNode* camera = dynamic_cast<const osg::CameraNode*>(*ritr);
if (camera &&
(camera->getReferenceFrame()==osg::Transform::ABSOLUTE_RF || camera->getParents().empty()))
{
break;
}
}
}
// do the accumulation of the active part of nodepath.
for(;
i<nodePath.size();
++i)
{
const_cast<Node*>(nodePath[i])->accept(*this);
}
}
};
Matrix osg::computeLocalToWorld(const NodePath& nodePath)
Matrix osg::computeLocalToWorld(const NodePath& nodePath, bool ignoreCameraNodes)
{
Matrix matrix;
TransformVisitor tv(matrix,TransformVisitor::LOCAL_TO_WORLD);
TransformVisitor tv(matrix,TransformVisitor::LOCAL_TO_WORLD,ignoreCameraNodes);
tv.accumulate(nodePath);
return matrix;
}
Matrix osg::computeWorldToLocal(const NodePath& nodePath)
Matrix osg::computeWorldToLocal(const NodePath& nodePath, bool ignoreCameraNodes)
{
osg::Matrix matrix;
TransformVisitor tv(matrix,TransformVisitor::WORLD_TO_LOCAL);
TransformVisitor tv(matrix,TransformVisitor::WORLD_TO_LOCAL,ignoreCameraNodes);
tv.accumulate(nodePath);
return matrix;
}
Matrix osg::computeLocalToEye(const Matrix& modelview,const NodePath& nodePath)
Matrix osg::computeLocalToEye(const Matrix& modelview,const NodePath& nodePath, bool ignoreCameraNodes)
{
Matrix matrix(modelview);
TransformVisitor tv(matrix,TransformVisitor::LOCAL_TO_WORLD);
TransformVisitor tv(matrix,TransformVisitor::LOCAL_TO_WORLD,ignoreCameraNodes);
tv.accumulate(nodePath);
return matrix;
}
Matrix osg::computeEyeToLocal(const Matrix& modelview,const NodePath& nodePath)
Matrix osg::computeEyeToLocal(const Matrix& modelview,const NodePath& nodePath, bool ignoreCameraNodes)
{
Matrix matrix;
matrix.invert(modelview);
TransformVisitor tv(matrix,TransformVisitor::WORLD_TO_LOCAL);
TransformVisitor tv(matrix,TransformVisitor::WORLD_TO_LOCAL,ignoreCameraNodes);
tv.accumulate(nodePath);
return matrix;
}