FGFS-4.1/OpenSceneGraph
4
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Added LEFT_EYE and RIGHT_EYE stereo to osg::DisplaySettings/osgUtil::SceneView

Browse Source 
Renamed LODBias to LODScale.
This commit is contained in:
Robert Osfield 2002-11-12 10:22:38 +00:00
parent 6d1ba6c0f4
commit 8e84722f90
15 changed files with 180 additions and 104 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
Make/debugtests.bat
View File

@ -82,8 +82,8 @@ echo osglight glider.osg
osglight glider.osg
more memleaks.log
echo osgimpostor Town.osg
osgimpostor Town.osg
echo osgimpostor
osgimpostor
more memleaks.log
echo osgmultitexture cessnafire.osg

7
Make/makedefs
View File

@ -291,9 +291,10 @@ ifeq ($(OS),Darwin)
LIB_EXT = dylib
QUICKTIME = -framework QuickTime $(CARBON_LIB)
TIFF_LIB = -ltiff
SRC_DIRS = osg osgUtil osgDB \
osgGA osgGLUT \
osgPlugins osgParticle \
# src libs which require external libs: osgText
SRC_DIRS = osg osgUtil osgDB osgParticle\
osgGA osgGLUT \
osgPlugins \
Demos
LIBVERSION = -dylib_current_version 0.9.1

4
Make/osgtests.bat
View File

@ -58,8 +58,8 @@ osghud dumptruck.osg
echo osglight glider.osg
osglight glider.osg
echo osgimpostor Town.osg
osgimpostor Town.osg
echo osgimpostor
osgimpostor
echo osgmultitexture cessnafire.osg
osgmultitexture cessnafire.osg

4
include/osg/CollectOccludersVisitor
View File

@ -26,8 +26,8 @@ class SG_EXPORT CollectOccludersVisitor : public osg::NodeVisitor, public osg::C
virtual void reset();
virtual float getDistanceToEyePoint(const Vec3& pos, bool withLODBias) const;
virtual float getDistanceFromEyePoint(const Vec3& pos, bool withLODBias) const;
virtual float getDistanceToEyePoint(const Vec3& pos, bool withLODScale) const;
virtual float getDistanceFromEyePoint(const Vec3& pos, bool withLODScale) const;
virtual void apply(osg::Node&);
virtual void apply(osg::Transform& node);

6
include/osg/CullStack
View File

@ -66,8 +66,8 @@ class SG_EXPORT CullStack
/** Returns the current CullingMode.*/
CullingMode getCullingMode() const { return _cullingMode; }
void setLODBias(float bias) { _LODBias = bias; }
float getLODBias() const { return _LODBias; }
void setLODScale(float bias) { _LODScale = bias; }
float getLODScale() const { return _LODScale; }
void setSmallFeatureCullingPixelSize(float value) { _smallFeatureCullingPixelSize=value; }
float getSmallFeatureCullingPixelSize() const { return _smallFeatureCullingPixelSize; }
@ -163,7 +163,7 @@ class SG_EXPORT CullStack
void popCullingSet();
CullingMode _cullingMode;
float _LODBias;
float _LODScale;
float _smallFeatureCullingPixelSize;
// base set of shadow volume occluder to use in culling.

4
include/osg/DisplaySettings
View File

@ -64,7 +64,9 @@ class SG_EXPORT DisplaySettings : public osg::Referenced
QUAD_BUFFER,
ANAGLYPHIC,
HORIZONTAL_SPLIT,
VERTICAL_SPLIT
VERTICAL_SPLIT,
LEFT_EYE,
RIGHT_EYE
};
void setStereoMode(StereoMode mode) { _stereoMode = mode; }

4
include/osg/NodeVisitor
View File

@ -192,12 +192,12 @@ class SG_EXPORT NodeVisitor : public Referenced
/** Get the distance from a point to the eye point, distance value in local coordinate system.
* Note, not all NodeVisitor implement this method, it is mainly cull visitors which will implement.
* If the getDistianceFromEyePoint(pos) is not implmented than a default value of 0.0 is returned.*/
virtual float getDistanceToEyePoint(const Vec3& /*pos*/, bool /*useLODBias*/) const { return 0.0f; }
virtual float getDistanceToEyePoint(const Vec3& /*pos*/, bool /*useLODScale*/) const { return 0.0f; }
/** Get the distance of a point from the eye point, distance value in the eye coordinate system.
* Note, not all NodeVisitor implement this method, it is mainly cull visitors which will implement.
* If the getDistianceFromEyePoint(pos) is not implmented than a default value of 0.0 is returned.*/
virtual float getDistanceFromEyePoint(const Vec3& /*pos*/, bool /*useLODBias*/) const { return 0.0f; }
virtual float getDistanceFromEyePoint(const Vec3& /*pos*/, bool /*useLODScale*/) const { return 0.0f; }
virtual void apply(Node& node) { traverse(node);}

4
include/osgUtil/CullVisitor
View File

@ -48,8 +48,8 @@ class OSGUTIL_EXPORT CullVisitor : public osg::NodeVisitor, public osg::CullStac
virtual void reset();
virtual float getDistanceToEyePoint(const osg::Vec3& pos, bool withLODBias) const;
virtual float getDistanceFromEyePoint(const osg::Vec3& pos, bool withLODBias) const;
virtual float getDistanceToEyePoint(const osg::Vec3& pos, bool withLODScale) const;
virtual float getDistanceFromEyePoint(const osg::Vec3& pos, bool withLODScale) const;
virtual void apply(osg::Node&);
virtual void apply(osg::Geode& node);

6
include/osgUtil/SceneView
View File

@ -167,10 +167,10 @@ class OSGUTIL_EXPORT SceneView : public osg::Referenced
const osg::Node::NodeMask getCullMaskRight() const { return _cullMaskRight; }
/** Set the LOD bias for the CullVisitor to use.*/
void setLODBias(float bias) { _LODBias = bias; }
void setLODScale(float bias) { _LODScale = bias; }
/** Get the LOD bias.*/
float getLODBias() const { return _LODBias; }
float getLODScale() const { return _LODScale; }
/** Set the Small Feature Culling Pixel Size.*/
void setSmallFeatureCullingPixelSize(float value) { _smallFeatureCullingPixelSize=value; }
@ -319,7 +319,7 @@ class OSGUTIL_EXPORT SceneView : public osg::Referenced
CullVisitor::ComputeNearFarMode _computeNearFar;
osg::CullStack::CullingMode _cullingMode;
float _LODBias;
float _LODScale;
float _smallFeatureCullingPixelSize;
FusionDistanceMode _fusionDistanceMode;

10
src/osg/CollectOccludersVisitor.cpp
View File

@ -32,19 +32,19 @@ void CollectOccludersVisitor::reset()
CullStack::reset();
}
float CollectOccludersVisitor::getDistanceToEyePoint(const Vec3& pos, bool withLODBias) const
float CollectOccludersVisitor::getDistanceToEyePoint(const Vec3& pos, bool withLODScale) const
{
if (withLODBias) return (pos-getEyeLocal()).length()*getLODBias();
if (withLODScale) return (pos-getEyeLocal()).length()*getLODScale();
else return (pos-getEyeLocal()).length();
}
float CollectOccludersVisitor::getDistanceFromEyePoint(const Vec3& pos, bool withLODBias) const
float CollectOccludersVisitor::getDistanceFromEyePoint(const Vec3& pos, bool withLODScale) const
{
const Matrix& matrix = *_modelviewStack.back();
float dist = -(pos[0]*matrix(0,2)+pos[1]*matrix(1,2)+pos[2]*matrix(2,2)+matrix(3,2));
if (withLODBias) return dist*getLODBias();
else return dist*getLODBias();
if (withLODScale) return dist*getLODScale();
else return dist*getLODScale();
}
void CollectOccludersVisitor::apply(osg::Node& node)

2
src/osg/CullStack.cpp
View File

@ -5,7 +5,7 @@ using namespace osg;
CullStack::CullStack()
{
_cullingMode = ENABLE_ALL_CULLING;
_LODBias = 1.0f;
_LODScale = 1.0f;
_smallFeatureCullingPixelSize = 2.0f;
_frustumVolume=-1.0f;
_bbCornerNear = 0;

12
src/osg/DisplaySettings.cpp
View File

@ -129,6 +129,16 @@ void DisplaySettings::readEnvironmentalVariables()
{
_stereoMode = VERTICAL_SPLIT;
}
else
if (strcmp(ptr,"LEFT_EYE")==0)
{
_stereoMode = LEFT_EYE;
}
else
if (strcmp(ptr,"RIGHT_EYE")==0)
{
_stereoMode = RIGHT_EYE;
}
}
if( (ptr = getenv("OSG_STEREO")) != 0)
@ -230,6 +240,8 @@ void DisplaySettings::readCommandLine(std::vector<std::string>& commandLine)
else if (*itr=="QUAD_BUFFER") { _stereo = true;_stereoMode = QUAD_BUFFER; ++itr; }
else if (*itr=="HORIZONTAL_SPLIT") { _stereo = true;_stereoMode = HORIZONTAL_SPLIT; ++itr; }
else if (*itr=="VERTICAL_SPLIT") { _stereo = true;_stereoMode = VERTICAL_SPLIT; ++itr; }
else if (*itr=="LEFT_EYE") { _stereo = true;_stereoMode = LEFT_EYE; ++itr; }
else if (*itr=="RIGHT_EYE") { _stereo = true;_stereoMode = RIGHT_EYE; ++itr; }
else if (*itr=="ON") { _stereo = true; ++itr; }
else if (*itr=="OFF") { _stereo = false; ++itr; }
}

4
src/osgGLUT/Viewer.cpp
View File

@ -958,11 +958,11 @@ void Viewer::keyboard(unsigned char key, int x, int y)
break;
case '/' :
if (sceneView->getLODBias()>0.5) sceneView->setLODBias(sceneView->getLODBias()/1.5f);
if (sceneView->getLODScale()>0.5) sceneView->setLODScale(sceneView->getLODScale()/1.5f);
break;
case '*' :
if (sceneView->getLODBias()<30) sceneView->setLODBias(sceneView->getLODBias()*1.5f);
if (sceneView->getLODScale()<30) sceneView->setLODScale(sceneView->getLODScale()*1.5f);
break;
case '+' :

12
src/osgUtil/CullVisitor.cpp
View File

@ -132,9 +132,9 @@ void CullVisitor::reset()
}
float CullVisitor::getDistanceToEyePoint(const Vec3& pos, bool withLODBias) const
float CullVisitor::getDistanceToEyePoint(const Vec3& pos, bool withLODScale) const
{
if (withLODBias) return (pos-getEyeLocal()).length()*getLODBias();
if (withLODScale) return (pos-getEyeLocal()).length()*getLODScale();
else return (pos-getEyeLocal()).length();
}
@ -143,13 +143,13 @@ inline float distance(const osg::Vec3& coord,const osg::Matrix& matrix)
return -(coord[0]*matrix(0,2)+coord[1]*matrix(1,2)+coord[2]*matrix(2,2)+matrix(3,2));
}
float CullVisitor::getDistanceFromEyePoint(const osg::Vec3& pos, bool withLODBias) const
float CullVisitor::getDistanceFromEyePoint(const osg::Vec3& pos, bool withLODScale) const
{
const Matrix& matrix = *_modelviewStack.back();
float dist = distance(pos,matrix);
if (withLODBias) return dist*getLODBias();
else return dist*getLODBias();
if (withLODScale) return dist*getLODScale();
else return dist*getLODScale();
}
void CullVisitor::popProjectionMatrix()
@ -561,7 +561,7 @@ void CullVisitor::apply(Impostor& node)
float distance2 = (eyeLocal-bs.center()).length2();
if (!_impostorActive ||
distance2*_LODBias*_LODBias<node.getImpostorThreshold2() ||
distance2*_LODScale*_LODScale<node.getImpostorThreshold2() ||
distance2<bs.radius2()*2.0f)
{
// outwith the impostor distance threshold therefore simple

201
src/osgUtil/SceneView.cpp
View File

@ -24,7 +24,7 @@ SceneView::SceneView(DisplaySettings* ds)
_computeNearFar = CullVisitor::COMPUTE_NEAR_FAR_USING_BOUNDING_VOLUMES;
_cullingMode = osg::CullStack::ENABLE_ALL_CULLING;
_LODBias = 1.0f;
_LODScale = 1.0f;
_smallFeatureCullingPixelSize = 3.0f;
_fusionDistanceMode = USE_CAMERA_FUSION_DISTANCE;
@ -245,6 +245,22 @@ void SceneView::cull()
if (!projection) projection = osgNew osg::Matrix();
if (!modelview) modelview = osgNew osg::Matrix();
if (!_cullVisitor)
{
osg::notify(osg::INFO) << "Warning: no valid osgUtil::SceneView:: attached, creating a default CullVisitor automatically."<< std::endl;
_cullVisitor = osgNew CullVisitor;
}
if (!_rendergraph)
{
osg::notify(osg::INFO) << "Warning: no valid osgUtil::SceneView:: attached, creating a global default RenderGraph automatically."<< std::endl;
_rendergraph = osgNew RenderGraph;
}
if (!_renderStage)
{
osg::notify(osg::INFO) << "Warning: no valid osgUtil::SceneView::_renderStage attached, creating a default RenderStage automatically."<< std::endl;
_renderStage = osgNew RenderStage;
}
if (_displaySettings.valid() && _displaySettings->getStereo())
{
@ -269,74 +285,114 @@ void SceneView::cull()
float sd = _displaySettings->getScreenDistance();
float es = 0.5f*iod*(fusionDistance/sd);
if (!_cullVisitorLeft.valid()) _cullVisitorLeft = dynamic_cast<CullVisitor*>(_cullVisitor->cloneType());
if (!_rendergraphLeft.valid()) _rendergraphLeft = dynamic_cast<RenderGraph*>(_rendergraph->cloneType());
if (!_renderStageLeft.valid()) _renderStageLeft = dynamic_cast<RenderStage*>(_renderStage->clone(osg::CopyOp::DEEP_COPY_ALL));
if (!_cullVisitorRight.valid()) _cullVisitorRight = dynamic_cast<CullVisitor*>(_cullVisitor->cloneType());
if (!_rendergraphRight.valid()) _rendergraphRight = dynamic_cast<RenderGraph*>(_rendergraph->cloneType());
if (!_renderStageRight.valid()) _renderStageRight = dynamic_cast<RenderStage*>(_renderStage->clone(osg::CopyOp::DEEP_COPY_ALL));
// set up the left eye.
osg::ref_ptr<osg::Matrix> projectionLeft = osgNew osg::Matrix(osg::Matrix(1.0f,0.0f,0.0f,0.0f,
0.0f,1.0f,0.0f,0.0f,
iod/(2.0f*sd),0.0f,1.0f,0.0f,
0.0f,0.0f,0.0f,1.0f)*
(*projection));
osg::ref_ptr<osg::Matrix> modelviewLeft = osgNew osg::Matrix( (*modelview) *
osg::Matrix(1.0f,0.0f,0.0f,0.0f,
0.0f,1.0f,0.0f,0.0f,
0.0f,0.0f,1.0f,0.0f,
es,0.0f,0.0f,1.0f));
_cullVisitorLeft->setTraversalMask(_cullMaskLeft);
cullStage(projectionLeft.get(),modelviewLeft.get(),_cullVisitorLeft.get(),_rendergraphLeft.get(),_renderStageLeft.get());
// set up the right eye.
osg::ref_ptr<osg::Matrix> projectionRight = osgNew osg::Matrix(osg::Matrix(1.0f,0.0f,0.0f,0.0f,
0.0f,1.0f,0.0f,0.0f,
-iod/(2.0f*sd),0.0f,1.0f,0.0f,
0.0f,0.0f,0.0f,1.0f)*
(*projection));
osg::ref_ptr<osg::Matrix> modelviewRight = osgNew osg::Matrix( (*modelview) *
osg::Matrix(1.0f,0.0f,0.0f,0.0f,
0.0f,1.0f,0.0f,0.0f,
0.0f,0.0f,1.0f,0.0f,
-es,0.0f,0.0f,1.0f));
_cullVisitorRight->setTraversalMask(_cullMaskRight);
cullStage(projectionRight.get(),modelviewRight.get(),_cullVisitorRight.get(),_rendergraphRight.get(),_renderStageRight.get());
if (_camera.valid() && _computeNearFar != CullVisitor::DO_NOT_COMPUTE_NEAR_FAR)
if (_displaySettings->getStereoMode()==osg::DisplaySettings::LEFT_EYE)
{
// clamp the camera to the near/far computed in cull traversal.
_camera->setNearFar(_cullVisitorRight->getCalculatedNearPlane(),_cullVisitorRight->getCalculatedFarPlane());
// set up the left eye.
osg::ref_ptr<osg::Matrix> projectionLeft = osgNew osg::Matrix(osg::Matrix(1.0f,0.0f,0.0f,0.0f,
0.0f,1.0f,0.0f,0.0f,
iod/(2.0f*sd),0.0f,1.0f,0.0f,
0.0f,0.0f,0.0f,1.0f)*
(*projection));
osg::ref_ptr<osg::Matrix> modelviewLeft = osgNew osg::Matrix( (*modelview) *
osg::Matrix(1.0f,0.0f,0.0f,0.0f,
0.0f,1.0f,0.0f,0.0f,
0.0f,0.0f,1.0f,0.0f,
es,0.0f,0.0f,1.0f));
_cullVisitor->setTraversalMask(_cullMaskLeft);
cullStage(projectionLeft.get(),modelviewLeft.get(),_cullVisitor.get(),_rendergraph.get(),_renderStage.get());
if (_camera.valid() && _computeNearFar != CullVisitor::DO_NOT_COMPUTE_NEAR_FAR)
{
// clamp the camera to the near/far computed in cull traversal.
_camera->setNearFar(_cullVisitor->getCalculatedNearPlane(),_cullVisitor->getCalculatedFarPlane());
}
}
else if (_displaySettings->getStereoMode()==osg::DisplaySettings::RIGHT_EYE)
{
// set up the right eye.
osg::ref_ptr<osg::Matrix> projectionRight = osgNew osg::Matrix(osg::Matrix(1.0f,0.0f,0.0f,0.0f,
0.0f,1.0f,0.0f,0.0f,
-iod/(2.0f*sd),0.0f,1.0f,0.0f,
0.0f,0.0f,0.0f,1.0f)*
(*projection));
osg::ref_ptr<osg::Matrix> modelviewRight = osgNew osg::Matrix( (*modelview) *
osg::Matrix(1.0f,0.0f,0.0f,0.0f,
0.0f,1.0f,0.0f,0.0f,
0.0f,0.0f,1.0f,0.0f,
-es,0.0f,0.0f,1.0f));
_cullVisitor->setTraversalMask(_cullMaskRight);
cullStage(projectionRight.get(),modelviewRight.get(),_cullVisitor.get(),_rendergraph.get(),_renderStage.get());
if (_camera.valid() && _computeNearFar != CullVisitor::DO_NOT_COMPUTE_NEAR_FAR)
{
// clamp the camera to the near/far computed in cull traversal.
_camera->setNearFar(_cullVisitor->getCalculatedNearPlane(),_cullVisitor->getCalculatedFarPlane());
}
}
else
{
if (!_cullVisitorLeft.valid()) _cullVisitorLeft = dynamic_cast<CullVisitor*>(_cullVisitor->cloneType());
if (!_rendergraphLeft.valid()) _rendergraphLeft = dynamic_cast<RenderGraph*>(_rendergraph->cloneType());
if (!_renderStageLeft.valid()) _renderStageLeft = dynamic_cast<RenderStage*>(_renderStage->clone(osg::CopyOp::DEEP_COPY_ALL));
if (!_cullVisitorRight.valid()) _cullVisitorRight = dynamic_cast<CullVisitor*>(_cullVisitor->cloneType());
if (!_rendergraphRight.valid()) _rendergraphRight = dynamic_cast<RenderGraph*>(_rendergraph->cloneType());
if (!_renderStageRight.valid()) _renderStageRight = dynamic_cast<RenderStage*>(_renderStage->clone(osg::CopyOp::DEEP_COPY_ALL));
// set up the left eye.
osg::ref_ptr<osg::Matrix> projectionLeft = osgNew osg::Matrix(osg::Matrix(1.0f,0.0f,0.0f,0.0f,
0.0f,1.0f,0.0f,0.0f,
iod/(2.0f*sd),0.0f,1.0f,0.0f,
0.0f,0.0f,0.0f,1.0f)*
(*projection));
osg::ref_ptr<osg::Matrix> modelviewLeft = osgNew osg::Matrix( (*modelview) *
osg::Matrix(1.0f,0.0f,0.0f,0.0f,
0.0f,1.0f,0.0f,0.0f,
0.0f,0.0f,1.0f,0.0f,
es,0.0f,0.0f,1.0f));
_cullVisitorLeft->setTraversalMask(_cullMaskLeft);
cullStage(projectionLeft.get(),modelviewLeft.get(),_cullVisitorLeft.get(),_rendergraphLeft.get(),_renderStageLeft.get());
// set up the right eye.
osg::ref_ptr<osg::Matrix> projectionRight = osgNew osg::Matrix(osg::Matrix(1.0f,0.0f,0.0f,0.0f,
0.0f,1.0f,0.0f,0.0f,
-iod/(2.0f*sd),0.0f,1.0f,0.0f,
0.0f,0.0f,0.0f,1.0f)*
(*projection));
osg::ref_ptr<osg::Matrix> modelviewRight = osgNew osg::Matrix( (*modelview) *
osg::Matrix(1.0f,0.0f,0.0f,0.0f,
0.0f,1.0f,0.0f,0.0f,
0.0f,0.0f,1.0f,0.0f,
-es,0.0f,0.0f,1.0f));
_cullVisitorRight->setTraversalMask(_cullMaskRight);
cullStage(projectionRight.get(),modelviewRight.get(),_cullVisitorRight.get(),_rendergraphRight.get(),_renderStageRight.get());
if (_camera.valid() && _computeNearFar != CullVisitor::DO_NOT_COMPUTE_NEAR_FAR)
{
// clamp the camera to the near/far computed in cull traversal.
_camera->setNearFar(_cullVisitorRight->getCalculatedNearPlane(),_cullVisitorRight->getCalculatedFarPlane());
}
}
}
else
{
if (!_cullVisitor)
{
osg::notify(osg::INFO) << "Warning: no valid osgUtil::SceneView:: attached, creating a default CullVisitor automatically."<< std::endl;
_cullVisitor = osgNew CullVisitor;
}
if (!_rendergraph)
{
osg::notify(osg::INFO) << "Warning: no valid osgUtil::SceneView:: attached, creating a global default RenderGraph automatically."<< std::endl;
_rendergraph = osgNew RenderGraph;
}
if (!_renderStage)
{
osg::notify(osg::INFO) << "Warning: no valid osgUtil::SceneView::_renderStage attached, creating a default RenderStage automatically."<< std::endl;
_renderStage = osgNew RenderStage;
}
_cullVisitor->setTraversalMask(_cullMask);
cullStage(projection.get(),modelview.get(),_cullVisitor.get(),_rendergraph.get(),_renderStage.get());
@ -410,7 +466,7 @@ void SceneView::cullStage(osg::Matrix* projection,osg::Matrix* modelview,osgUtil
cullVisitor->setCullingMode(_cullingMode);
cullVisitor->setComputeNearFarMode(_computeNearFar);
cullVisitor->setLODBias(_LODBias);
cullVisitor->setLODScale(_LODScale);
cullVisitor->setSmallFeatureCullingPixelSize(_smallFeatureCullingPixelSize);
cullVisitor->setClearNode(NULL); // reset earth sky on each frame.
@ -638,12 +694,17 @@ void SceneView::draw()
}
}
break;
case(osg::DisplaySettings::RIGHT_EYE):
case(osg::DisplaySettings::LEFT_EYE):
{
_globalState->setAttribute(_viewport.get());
_renderStage->drawPreRenderStages(*_state,previous);
_renderStage->draw(*_state,previous);
}
break;
default:
{
osg::notify(osg::NOTICE)<<"Warning: stereo camera mode not implemented yet."<< std::endl;
_globalState->setAttribute(_viewport.get());
_renderStageLeft->drawPreRenderStages(*_state,previous);
_renderStageLeft->draw(*_state,previous);
}
break;
}
@ -651,9 +712,9 @@ void SceneView::draw()
else
{
_globalState->setAttribute(_viewport.get());
osg::ref_ptr<osg::ColorMask> cmask = osgNew osg::ColorMask;
cmask->setMask(true,true,true,true);
_globalState->setAttribute(cmask.get());
// osg::ref_ptr<osg::ColorMask> cmask = osgNew osg::ColorMask;
// cmask->setMask(true,true,true,true);
// _globalState->setAttribute(cmask.get());
// bog standard draw.
_renderStage->drawPreRenderStages(*_state,previous);