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Added support for CullVisitor::clampProjectionMatrixCallback

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This commit is contained in:
Robert Osfield
2004-01-28 10:49:23 +00:00
parent 21633a9b8f
commit 39d7afaed2
3 changed files with 70 additions and 4 deletions
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68
include/osgUtil/CullVisitor
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@@ -214,8 +214,70 @@ class OSGUTIL_EXPORT CullVisitor : public osg::NodeVisitor, public osg::CullStac
/** reimplement CullStack's popProjectionMatrix() adding clamping of the projection matrix to the computed near and far.*/
virtual void popProjectionMatrix();
bool clampProjectionMatrix(osg::Matrixf& projection, value_type& znear, value_type& zfar) const;
bool clampProjectionMatrix(osg::Matrixd& projection, value_type& znear, value_type& zfar) const;
/** Callback for overriding the CullVisitor's default clamping of the projection matrix to computed near and far values.
* Note, both Matrixf and Matrixd versions of clampProjectionMatrixImplementation must be implemented as the CullVisitor
* can target either Matrix data type, configured at compile time.*/
struct ClampProjectionMatrixCallback : public osg::Referenced
{
virtual bool clampProjectionMatrixImplementation(osg::Matrixf& projection, double& znear, double& zfar) const = 0;
virtual bool clampProjectionMatrixImplementation(osg::Matrixd& projection, double& znear, double& zfar) const = 0;
};
/** set the ClampProjectionMatrixCallback.*/
void setClampProjectionMatrixCallback(ClampProjectionMatrixCallback* cpmc) { _clampProjectionMatrixCallback = cpmc; }
/** get the non const ClampProjectionMatrixCallback.*/
ClampProjectionMatrixCallback* getClampProjectionMatrixCallback() { return _clampProjectionMatrixCallback.get(); }
/** get the const ClampProjectionMatrixCallback.*/
const ClampProjectionMatrixCallback* getClampProjectionMatrixCallback() const { return _clampProjectionMatrixCallback.get(); }
/** CullVisitor's default clamping of the projection float matrix to computed near and far values.
* Note, do not call this method directly, use clampProjectionMatrix(..) instead, unless you want to bypass the callback.*/
virtual bool clampProjectionMatrixImplementation(osg::Matrixf& projection, double& znear, double& zfar) const;
/** CullVisitor's default clamping of the projection double matrix to computed near and far values.
* Note, do not call this method directly, use clampProjectionMatrix(..) instead, unless you want to bypass the callback.*/
virtual bool clampProjectionMatrixImplementation(osg::Matrixd& projection, double& znear, double& zfar) const;
/** clamp the projection float matrix to computed near and far values, use callback if it exists, otherwise use default CullVisitro implemntation.*/
inline bool clampProjectionMatrix(osg::Matrixf& projection, value_type& znear, value_type& zfar) const
{
double zn = znear;
double zf = zfar;
bool result = false;
if (_clampProjectionMatrixCallback.valid()) result = _clampProjectionMatrixCallback->clampProjectionMatrixImplementation(projection, zn, zf);
else result = clampProjectionMatrixImplementation(projection, zn, zf);
if (result)
{
znear = zn;
zfar = zn;
return true;
}
else
return false;
}
/** clamp the projection double matrix to computed near and far values, use callback if it exists, otherwise use default CullVisitro implemntation.*/
inline bool clampProjectionMatrix(osg::Matrixd& projection, value_type& znear, value_type& zfar) const
{
double zn = znear;
double zf = zfar;
bool result = false;
if (_clampProjectionMatrixCallback.valid()) result = _clampProjectionMatrixCallback->clampProjectionMatrixImplementation(projection, zn, zf);
else result = clampProjectionMatrixImplementation(projection, zn, zf);
if (result)
{
znear = zn;
zfar = zn;
return true;
}
else
return false;
}
void setState(osg::State* state) { _state = state; }
osg::State* getState() { return _state.get(); }
@@ -260,6 +322,8 @@ class OSGUTIL_EXPORT CullVisitor : public osg::NodeVisitor, public osg::CullStac
value_type _computed_znear;
value_type _computed_zfar;
osg::ref_ptr<ClampProjectionMatrixCallback> _clampProjectionMatrixCallback;
osg::ref_ptr<const osg::ClearNode> _clearNode;
bool _impostorActive;

4
src/osgUtil/CullVisitor.cpp
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@@ -251,12 +251,12 @@ bool _clampProjectionMatrix(matrix_type& projection, value_type& znear, value_ty
}
bool CullVisitor::clampProjectionMatrix(osg::Matrixf& projection, value_type& znear, value_type& zfar) const
bool CullVisitor::clampProjectionMatrixImplementation(osg::Matrixf& projection, double& znear, double& zfar) const
{
return _clampProjectionMatrix( projection, znear, zfar, _nearFarRatio );
}
bool CullVisitor::clampProjectionMatrix(osg::Matrixd& projection, value_type& znear, value_type& zfar) const
bool CullVisitor::clampProjectionMatrixImplementation(osg::Matrixd& projection, double& znear, double& zfar) const
{
return _clampProjectionMatrix( projection, znear, zfar, _nearFarRatio );
}

2
src/osgUtil/SceneView.cpp
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@@ -424,12 +424,14 @@ void SceneView::cull()
if (!_renderStageRight.valid()) _renderStageRight = dynamic_cast<RenderStage*>(_renderStage->clone(osg::CopyOp::DEEP_COPY_ALL));
_cullVisitorLeft->setDatabaseRequestHandler(_cullVisitor->getDatabaseRequestHandler());
_cullVisitorLeft->setClampProjectionMatrixCallback(_cullVisitor->getClampProjectionMatrixCallback());
_cullVisitorLeft->setTraversalMask(_cullMaskLeft);
cullStage(computeLeftEyeProjection(_projectionMatrix),computeLeftEyeView(_viewMatrix),_cullVisitorLeft.get(),_rendergraphLeft.get(),_renderStageLeft.get());
// set up the right eye.
_cullVisitorRight->setDatabaseRequestHandler(_cullVisitor->getDatabaseRequestHandler());
_cullVisitorRight->setClampProjectionMatrixCallback(_cullVisitor->getClampProjectionMatrixCallback());
_cullVisitorRight->setTraversalMask(_cullMaskRight);
cullStage(computeRightEyeProjection(_projectionMatrix),computeRightEyeView(_viewMatrix),_cullVisitorRight.get(),_rendergraphRight.get(),_renderStageRight.get());