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Added support for osgUtil::Intersectors being in WINDOW, PROJECTION, VIEW or MODEL coordinates

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This commit is contained in:
Robert Osfield
2006-11-01 14:41:32 +00:00
parent a253e17d3e
commit 75169ad16f
3 changed files with 170 additions and 20 deletions
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86
src/osgUtil/IntersectionVisitor.cpp
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@@ -219,18 +219,40 @@ LineSegmentIntersector::LineSegmentIntersector(const osg::Vec3d& start, const os
Intersector* LineSegmentIntersector::clone(osgUtil::IntersectionVisitor& iv)
{
osg::RefMatrix* model= iv.getModelMatrix();
if (model)
{
osg::Matrix inverse;
inverse.invert(*model);
return new LineSegmentIntersector(_start * inverse, _end * inverse, this);
}
else
if (_coordinateFrame==MODEL && iv.getModelMatrix()==0)
{
return new LineSegmentIntersector(_start, _end, this);
}
// compute the matrix that takes this Intersector from its CoordinateFrame into the local MODEL coordinate frame
// that geometry in the scene graph will always be in.
osg::Matrix matrix;
switch (_coordinateFrame)
{
case(WINDOW):
if (iv.getWindowMatrix()) matrix.preMult( *iv.getWindowMatrix() );
if (iv.getProjectionMatrix()) matrix.preMult( *iv.getProjectionMatrix() );
if (iv.getViewMatrix()) matrix.preMult( *iv.getViewMatrix() );
if (iv.getModelMatrix()) matrix.preMult( *iv.getModelMatrix() );
break;
case(PROJECTION):
if (iv.getProjectionMatrix()) matrix.preMult( *iv.getProjectionMatrix() );
if (iv.getViewMatrix()) matrix.preMult( *iv.getViewMatrix() );
if (iv.getModelMatrix()) matrix.preMult( *iv.getModelMatrix() );
break;
case(VIEW):
if (iv.getViewMatrix()) matrix.preMult( *iv.getViewMatrix() );
if (iv.getModelMatrix()) matrix.preMult( *iv.getModelMatrix() );
break;
case(MODEL):
if (iv.getModelMatrix()) matrix = *iv.getModelMatrix();
break;
}
osg::Matrix inverse;
inverse.invert(matrix);
return new LineSegmentIntersector(_start * inverse, _end * inverse, this);
}
bool LineSegmentIntersector::enter(const osg::Node& node)
@@ -615,8 +637,12 @@ void IntersectionVisitor::reset()
void IntersectionVisitor::apply(osg::Node& node)
{
osg::notify(osg::NOTICE)<<"apply(Node&)"<<std::endl;
if (!enter(node)) return;
osg::notify(osg::NOTICE)<<"inside apply(Node&)"<<std::endl;
traverse(node);
leave();
@@ -633,8 +659,12 @@ void IntersectionVisitor::apply(osg::Group& group)
void IntersectionVisitor::apply(osg::Geode& geode)
{
osg::notify(osg::NOTICE)<<"apply(Geode&)"<<std::endl;
if (!enter(geode)) return;
osg::notify(osg::NOTICE)<<"inside apply(Geode&)"<<std::endl;
for(unsigned int i=0; i<geode.getNumDrawables(); ++i)
{
intersect( geode.getDrawable(i) );
@@ -699,7 +729,7 @@ void IntersectionVisitor::apply(osg::Transform& transform)
osg::ref_ptr<osg::RefMatrix> matrix = _modelStack.empty() ? new osg::RefMatrix() : new osg::RefMatrix(*_modelStack.back());
transform.computeLocalToWorldMatrix(*matrix,this);
_modelStack.push_back(matrix);
pushModelMatrix(matrix.get());
// now push an new intersector clone transform to the new local coordinates
push_clone();
@@ -709,7 +739,7 @@ void IntersectionVisitor::apply(osg::Transform& transform)
// pop the clone.
pop_clone();
_modelStack.pop_back();
popModelMatrix();
// tidy up an cached cull variabes in the current intersector.
leave();
@@ -720,7 +750,17 @@ void IntersectionVisitor::apply(osg::Projection& projection)
{
if (!enter(projection)) return;
pushProjectionMatrix(new osg::RefMatrix(projection.getMatrix()) );
// now push an new intersector clone transform to the new local coordinates
push_clone();
traverse(projection);
// pop the clone.
pop_clone();
popProjectionMatrix();
leave();
}
@@ -728,9 +768,29 @@ void IntersectionVisitor::apply(osg::Projection& projection)
void IntersectionVisitor::apply(osg::CameraNode& camera)
{
if (!enter(camera)) return;
osg::notify(osg::NOTICE)<<"apply(CameraNode&)"<<std::endl;
// if (!enter(camera)) return;
osg::notify(osg::NOTICE)<<"inside apply(CameraNode&)"<<std::endl;
if (camera.getViewport()) pushWindowMatrix( camera.getViewport() );
pushProjectionMatrix( new osg::RefMatrix(camera.getProjectionMatrix()) );
pushViewMatrix( new osg::RefMatrix(camera.getViewMatrix()) );
pushModelMatrix( new osg::RefMatrix() );
// now push an new intersector clone transform to the new local coordinates
push_clone();
traverse(camera);
// pop the clone.
pop_clone();
popModelMatrix();
popViewMatrix();
popProjectionMatrix();
if (camera.getViewport()) popWindowMatrix();
leave();
// leave();
}