FGFS-4.1/OpenSceneGraph
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Moved SceneView across to use an osg::CameraNode to store the projection and view matrices,

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the viewport, the clear colour and the subgraph needing rendered.  This is done
transparently so all existing functionality will behave as before.  What it does
add is the ability to set a SceneView directly by a single osg::CameraNode when required.
This commit is contained in:
Robert Osfield
2005-10-28 13:11:56 +00:00
parent 3e3d16a99d
commit ab1bd48511
3 changed files with 147 additions and 131 deletions
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172
src/osgUtil/SceneView.cpp
View File

@@ -89,7 +89,6 @@ SceneView::SceneView(DisplaySettings* ds)
{
_displaySettings = ds;
_clearColor.set(0.2f, 0.2f, 0.4f, 1.0f);
_fusionDistanceMode = PROPORTIONAL_TO_SCREEN_DISTANCE;
@@ -99,7 +98,9 @@ SceneView::SceneView(DisplaySettings* ds)
_prioritizeTextures = false;
_viewport = new Viewport;
_camera = new CameraNode;
_camera->setViewport(new Viewport);
_camera->setClearColor(osg::Vec4(0.2f, 0.2f, 0.4f, 1.0f));
_initCalled = false;
@@ -125,8 +126,8 @@ SceneView::~SceneView()
void SceneView::setDefaults(unsigned int options)
{
_projectionMatrix.makePerspective(50.0f,1.4f,1.0f,10000.0f);
_viewMatrix.makeIdentity();
_camera->getProjectionMatrix().makePerspective(50.0f,1.4f,1.0f,10000.0f);
_camera->getViewMatrix().makeIdentity();
_globalStateSet = new osg::StateSet;
@@ -197,8 +198,32 @@ void SceneView::setDefaults(unsigned int options)
texenv->setMode(osg::TexEnv::MODULATE);
_globalStateSet->setTextureAttributeAndModes(0,texenv, osg::StateAttribute::ON);
_camera->setClearColor(osg::Vec4(0.2f, 0.2f, 0.4f, 1.0f));
}
_clearColor.set(0.2f, 0.2f, 0.4f, 1.0f);
void SceneView::setCamera(osg::CameraNode* camera)
{
if (camera)
{
_camera = camera;
}
else
{
osg::notify(osg::NOTICE)<<"Warning: attempt to assign a NULL camera to SceneView not permitted."<<std::endl;
}
}
void SceneView::setSceneData(osg::Node* node)
{
// take a temporary reference to node to prevent the possibility
// of it getting deleted when when we do the camera clear of children.
osg::ref_ptr<osg::Node> temporaryRefernce = node;
// remove pre existing children
_camera->removeChild(0, _camera->getNumChildren());
// add the new one in.
_camera->addChild(node);
}
void SceneView::init()
@@ -206,7 +231,7 @@ void SceneView::init()
_initCalled = true;
if (_sceneData.valid() && _initVisitor.valid())
if (_camera.valid() && _initVisitor.valid())
{
_initVisitor->reset();
_initVisitor->setFrameStamp(_frameStamp.get());
@@ -219,14 +244,14 @@ void SceneView::init()
_initVisitor->setTraversalNumber(_frameStamp->getFrameNumber());
}
_sceneData->accept(*_initVisitor.get());
_camera->accept(*_initVisitor.get());
}
}
void SceneView::update()
{
if (_sceneData.valid() && _updateVisitor.valid())
if (_camera.valid() && _updateVisitor.valid())
{
_updateVisitor->reset();
@@ -238,13 +263,13 @@ void SceneView::update()
_updateVisitor->setTraversalNumber(_frameStamp->getFrameNumber());
}
_sceneData->accept(*_updateVisitor.get());
_camera->accept(*_updateVisitor.get());
// now force a recompute of the bounding volume while we are still in
// the read/write app phase, this should prevent the need to recompute
// the bounding volumes from within the cull traversal which may be
// multi-threaded.
_sceneData->getBound();
_camera->getBound();
}
}
@@ -281,13 +306,13 @@ void SceneView::updateUniforms()
if (_activeUniforms & VIEW_MATRIX_UNIFORM)
{
osg::Uniform* uniform = _localStateSet->getOrCreateUniform("osg_ViewMatrix",osg::Uniform::FLOAT_MAT4);
uniform->set(_viewMatrix);
uniform->set(getViewMatrix());
}
if (_activeUniforms & VIEW_MATRIX_INVERSE_UNIFORM)
{
osg::Uniform* uniform = _localStateSet->getOrCreateUniform("osg_ViewMatrixInverse",osg::Uniform::FLOAT_MAT4);
uniform->set(osg::Matrix::inverse(_viewMatrix));
uniform->set(osg::Matrix::inverse(getViewMatrix()));
}
}
@@ -471,13 +496,13 @@ void SceneView::cull()
{
// set up the left eye.
_cullVisitor->setTraversalMask(_cullMaskLeft);
cullStage(computeLeftEyeProjection(_projectionMatrix),computeLeftEyeView(_viewMatrix),_cullVisitor.get(),_rendergraph.get(),_renderStage.get());
cullStage(computeLeftEyeProjection(getProjectionMatrix()),computeLeftEyeView(getViewMatrix()),_cullVisitor.get(),_rendergraph.get(),_renderStage.get());
if (_cullVisitor->getComputeNearFarMode()!=osgUtil::CullVisitor::DO_NOT_COMPUTE_NEAR_FAR)
{
CullVisitor::value_type zNear = _cullVisitor->getCalculatedNearPlane();
CullVisitor::value_type zFar = _cullVisitor->getCalculatedFarPlane();
_cullVisitor->clampProjectionMatrix(_projectionMatrix,zNear,zFar);
_cullVisitor->clampProjectionMatrix(getProjectionMatrix(),zNear,zFar);
}
}
@@ -485,13 +510,13 @@ void SceneView::cull()
{
// set up the right eye.
_cullVisitor->setTraversalMask(_cullMaskRight);
cullStage(computeRightEyeProjection(_projectionMatrix),computeRightEyeView(_viewMatrix),_cullVisitor.get(),_rendergraph.get(),_renderStage.get());
cullStage(computeRightEyeProjection(getProjectionMatrix()),computeRightEyeView(getViewMatrix()),_cullVisitor.get(),_rendergraph.get(),_renderStage.get());
if (_cullVisitor->getComputeNearFarMode()!=osgUtil::CullVisitor::DO_NOT_COMPUTE_NEAR_FAR)
{
CullVisitor::value_type zNear = _cullVisitor->getCalculatedNearPlane();
CullVisitor::value_type zFar = _cullVisitor->getCalculatedFarPlane();
_cullVisitor->clampProjectionMatrix(_projectionMatrix,zNear,zFar);
_cullVisitor->clampProjectionMatrix(getProjectionMatrix(),zNear,zFar);
}
}
@@ -509,21 +534,21 @@ void SceneView::cull()
_cullVisitorLeft->setDatabaseRequestHandler(_cullVisitor->getDatabaseRequestHandler());
_cullVisitorLeft->setClampProjectionMatrixCallback(_cullVisitor->getClampProjectionMatrixCallback());
_cullVisitorLeft->setTraversalMask(_cullMaskLeft);
cullStage(computeLeftEyeProjection(_projectionMatrix),computeLeftEyeView(_viewMatrix),_cullVisitorLeft.get(),_rendergraphLeft.get(),_renderStageLeft.get());
cullStage(computeLeftEyeProjection(getProjectionMatrix()),computeLeftEyeView(getViewMatrix()),_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());
cullStage(computeRightEyeProjection(getProjectionMatrix()),computeRightEyeView(getViewMatrix()),_cullVisitorRight.get(),_rendergraphRight.get(),_renderStageRight.get());
if (_cullVisitorLeft->getComputeNearFarMode()!=osgUtil::CullVisitor::DO_NOT_COMPUTE_NEAR_FAR &&
_cullVisitorRight->getComputeNearFarMode()!=osgUtil::CullVisitor::DO_NOT_COMPUTE_NEAR_FAR)
{
CullVisitor::value_type zNear = osg::minimum(_cullVisitorLeft->getCalculatedNearPlane(),_cullVisitorRight->getCalculatedNearPlane());
CullVisitor::value_type zFar = osg::maximum(_cullVisitorLeft->getCalculatedFarPlane(),_cullVisitorRight->getCalculatedFarPlane());
_cullVisitor->clampProjectionMatrix(_projectionMatrix,zNear,zFar);
_cullVisitor->clampProjectionMatrix(getProjectionMatrix(),zNear,zFar);
}
}
@@ -533,13 +558,13 @@ void SceneView::cull()
{
_cullVisitor->setTraversalMask(_cullMask);
cullStage(_projectionMatrix,_viewMatrix,_cullVisitor.get(),_rendergraph.get(),_renderStage.get());
cullStage(getProjectionMatrix(),getViewMatrix(),_cullVisitor.get(),_rendergraph.get(),_renderStage.get());
if (_cullVisitor->getComputeNearFarMode()!=osgUtil::CullVisitor::DO_NOT_COMPUTE_NEAR_FAR)
{
CullVisitor::value_type zNear = _cullVisitor->getCalculatedNearPlane();
CullVisitor::value_type zFar = _cullVisitor->getCalculatedFarPlane();
_cullVisitor->clampProjectionMatrix(_projectionMatrix,zNear,zFar);
_cullVisitor->clampProjectionMatrix(getProjectionMatrix(),zNear,zFar);
}
}
@@ -549,7 +574,7 @@ void SceneView::cull()
void SceneView::cullStage(const osg::Matrixd& projection,const osg::Matrixd& modelview,osgUtil::CullVisitor* cullVisitor, osgUtil::StateGraph* rendergraph, osgUtil::RenderStage* renderStage)
{
if (!_sceneData || !_viewport->valid()) return;
if (!_camera || !getViewport()) return;
if (!_initCalled) init();
@@ -558,7 +583,7 @@ void SceneView::cullStage(const osg::Matrixd& projection,const osg::Matrixd& mod
osg::ref_ptr<RefMatrix> mv = new osg::RefMatrix(modelview);
// collect any occluder in the view frustum.
if (_sceneData->containsOccluderNodes())
if (_camera->containsOccluderNodes())
{
//std::cout << "Scene graph contains occluder nodes, searching for them"<<std::endl;
@@ -577,12 +602,12 @@ void SceneView::cullStage(const osg::Matrixd& projection,const osg::Matrixd& mod
_collectOccludersVisistor->setTraversalNumber(_frameStamp->getFrameNumber());
}
_collectOccludersVisistor->pushViewport(_viewport.get());
_collectOccludersVisistor->pushViewport(getViewport());
_collectOccludersVisistor->pushProjectionMatrix(proj.get());
_collectOccludersVisistor->pushModelViewMatrix(mv.get());
// traverse the scene graph to search for occluder in there new positions.
_sceneData->accept(*_collectOccludersVisistor);
_camera->accept(*_collectOccludersVisistor);
_collectOccludersVisistor->popModelViewMatrix();
_collectOccludersVisistor->popProjectionMatrix();
@@ -629,8 +654,8 @@ void SceneView::cullStage(const osg::Matrixd& projection,const osg::Matrixd& mod
// achieves a certain amount of frame cohereancy of memory allocation.
rendergraph->clean();
renderStage->setViewport(_viewport.get());
renderStage->setClearColor(_clearColor);
renderStage->setViewport(getViewport());
renderStage->setClearColor(getClearColor());
switch(_lightingMode)
@@ -651,13 +676,18 @@ void SceneView::cullStage(const osg::Matrixd& projection,const osg::Matrixd& mod
if (_localStateSet.valid()) cullVisitor->pushStateSet(_localStateSet.get());
cullVisitor->pushViewport(_viewport.get());
cullVisitor->pushViewport(getViewport());
cullVisitor->pushProjectionMatrix(proj.get());
cullVisitor->pushModelViewMatrix(mv.get());
// traverse the scene graph to generate the rendergraph.
_sceneData->accept(*cullVisitor);
for(unsigned int childNo=0;
childNo<_camera->getNumChildren();
++childNo)
{
_camera->getChild(childNo)->accept(*cullVisitor);
}
cullVisitor->popModelViewMatrix();
cullVisitor->popProjectionMatrix();
@@ -695,9 +725,9 @@ void SceneView::cullStage(const osg::Matrixd& projection,const osg::Matrixd& mod
void SceneView::releaseAllGLObjects()
{
if (!_sceneData) return;
if (!_camera) return;
_sceneData->releaseGLObjects(_state.get());
_camera->releaseGLObjects(_state.get());
}
@@ -748,7 +778,7 @@ void SceneView::draw()
// assume the the draw which is about to happen could generate GL objects that need flushing in the next frame.
_requiresFlush = true;
_state->setInitialViewMatrix(new osg::RefMatrix(_viewMatrix));
_state->setInitialViewMatrix(new osg::RefMatrix(getViewMatrix()));
RenderLeaf* previous = NULL;
if (_displaySettings.valid() && _displaySettings->getStereo())
@@ -759,7 +789,7 @@ void SceneView::draw()
case(osg::DisplaySettings::QUAD_BUFFER):
{
_localStateSet->setAttribute(_viewport.get());
_localStateSet->setAttribute(getViewport());
// ensure that all color planes are active.
osg::ColorMask* cmask = static_cast<osg::ColorMask*>(_localStateSet->getAttribute(osg::StateAttribute::COLORMASK));
@@ -800,7 +830,7 @@ void SceneView::draw()
_renderStageRight->setReadBuffer(_drawBufferValue);
}
_localStateSet->setAttribute(_viewport.get());
_localStateSet->setAttribute(getViewport());
_renderStageLeft->drawPreRenderStages(*_state,previous);
@@ -880,18 +910,18 @@ void SceneView::draw()
int separation = _displaySettings->getSplitStereoHorizontalSeparation();
int left_half_width = (_viewport->width()-separation)/2;
int right_half_begin = (_viewport->width()+separation)/2;
int right_half_width = _viewport->width()-right_half_begin;
int left_half_width = (getViewport()->width()-separation)/2;
int right_half_begin = (getViewport()->width()+separation)/2;
int right_half_width = getViewport()->width()-right_half_begin;
osg::ref_ptr<osg::Viewport> viewportLeft = new osg::Viewport;
viewportLeft->setViewport(_viewport->x(),_viewport->y(),left_half_width,_viewport->height());
viewportLeft->setViewport(getViewport()->x(),getViewport()->y(),left_half_width,getViewport()->height());
osg::ref_ptr<osg::Viewport> viewportRight = new osg::Viewport;
viewportRight->setViewport(_viewport->x()+right_half_begin,_viewport->y(),right_half_width,_viewport->height());
viewportRight->setViewport(getViewport()->x()+right_half_begin,getViewport()->y(),right_half_width,getViewport()->height());
clearArea(_viewport->x()+left_half_width,_viewport->y(),separation,_viewport->height(),_renderStageLeft->getClearColor());
clearArea(getViewport()->x()+left_half_width,getViewport()->y(),separation,getViewport()->height(),_renderStageLeft->getClearColor());
if (_displaySettings->getSplitStereoHorizontalEyeMapping()==osg::DisplaySettings::LEFT_EYE_LEFT_VIEWPORT)
{
@@ -946,17 +976,17 @@ void SceneView::draw()
int separation = _displaySettings->getSplitStereoVerticalSeparation();
int bottom_half_height = (_viewport->height()-separation)/2;
int top_half_begin = (_viewport->height()+separation)/2;
int top_half_height = _viewport->height()-top_half_begin;
int bottom_half_height = (getViewport()->height()-separation)/2;
int top_half_begin = (getViewport()->height()+separation)/2;
int top_half_height = getViewport()->height()-top_half_begin;
osg::ref_ptr<osg::Viewport> viewportTop = new osg::Viewport;
viewportTop->setViewport(_viewport->x(),_viewport->y()+top_half_begin,_viewport->width(),top_half_height);
viewportTop->setViewport(getViewport()->x(),getViewport()->y()+top_half_begin,getViewport()->width(),top_half_height);
osg::ref_ptr<osg::Viewport> viewportBottom = new osg::Viewport;
viewportBottom->setViewport(_viewport->x(),_viewport->y(),_viewport->width(),bottom_half_height);
viewportBottom->setViewport(getViewport()->x(),getViewport()->y(),getViewport()->width(),bottom_half_height);
clearArea(_viewport->x(),_viewport->y()+bottom_half_height,_viewport->width(),separation,_renderStageLeft->getClearColor());
clearArea(getViewport()->x(),getViewport()->y()+bottom_half_height,getViewport()->width(),separation,_renderStageLeft->getClearColor());
if (_displaySettings->getSplitStereoVerticalEyeMapping()==osg::DisplaySettings::LEFT_EYE_TOP_VIEWPORT)
{
@@ -1003,14 +1033,14 @@ void SceneView::draw()
_renderStage->setColorMask(cmask);
_renderStage->setColorMask(cmask);
_localStateSet->setAttribute(_viewport.get());
_localStateSet->setAttribute(getViewport());
_renderStage->drawPreRenderStages(*_state,previous);
_renderStage->draw(*_state,previous);
}
break;
case(osg::DisplaySettings::VERTICAL_INTERLACE):
{
_localStateSet->setAttribute(_viewport.get());
_localStateSet->setAttribute(getViewport());
// ensure that all color planes are active.
osg::ColorMask* cmask = static_cast<osg::ColorMask*>(_localStateSet->getAttribute(osg::StateAttribute::COLORMASK));
@@ -1032,13 +1062,13 @@ void SceneView::draw()
glEnable(GL_STENCIL_TEST);
if(_redrawInterlacedStereoStencilMask ||
_interlacedStereoStencilWidth != _viewport->width() ||
_interlacedStereoStencilHeight != _viewport->height() )
_interlacedStereoStencilWidth != getViewport()->width() ||
_interlacedStereoStencilHeight != getViewport()->height() )
{
_viewport->apply(*_state);
getViewport()->apply(*_state);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(_viewport->x(), _viewport->width(), _viewport->y(), _viewport->height(), -1.0, 1.0);
glOrtho(getViewport()->x(), getViewport()->width(), getViewport()->y(), getViewport()->height(), -1.0, 1.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glDisable(GL_LIGHTING);
@@ -1050,15 +1080,15 @@ void SceneView::draw()
glPolygonStipple(patternVertEven);
glEnable(GL_POLYGON_STIPPLE);
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
glRecti(_viewport->x(), _viewport->y(), _viewport->width(), _viewport->height());
glRecti(getViewport()->x(), getViewport()->y(), getViewport()->width(), getViewport()->height());
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
glDisable(GL_POLYGON_STIPPLE);
glEnable(GL_LIGHTING);
glEnable(GL_DEPTH_TEST);
_redrawInterlacedStereoStencilMask = false;
_interlacedStereoStencilWidth = _viewport->width();
_interlacedStereoStencilHeight = _viewport->height();
_interlacedStereoStencilWidth = getViewport()->width();
_interlacedStereoStencilHeight = getViewport()->height();
}
_renderStageLeft->setClearMask(_renderStageLeft->getClearMask() & ~(GL_STENCIL_BUFFER_BIT));
@@ -1075,7 +1105,7 @@ void SceneView::draw()
break;
case(osg::DisplaySettings::HORIZONTAL_INTERLACE):
{
_localStateSet->setAttribute(_viewport.get());
_localStateSet->setAttribute(getViewport());
// ensure that all color planes are active.
osg::ColorMask* cmask = static_cast<osg::ColorMask*>(_localStateSet->getAttribute(osg::StateAttribute::COLORMASK));
@@ -1097,13 +1127,13 @@ void SceneView::draw()
glEnable(GL_STENCIL_TEST);
if(_redrawInterlacedStereoStencilMask ||
_interlacedStereoStencilWidth != _viewport->width() ||
_interlacedStereoStencilHeight != _viewport->height() )
_interlacedStereoStencilWidth != getViewport()->width() ||
_interlacedStereoStencilHeight != getViewport()->height() )
{
_viewport->apply(*_state);
getViewport()->apply(*_state);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(_viewport->x(), _viewport->width(), _viewport->y(), _viewport->height(), -1.0, 1.0);
glOrtho(getViewport()->x(), getViewport()->width(), getViewport()->y(), getViewport()->height(), -1.0, 1.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glDisable(GL_LIGHTING);
@@ -1115,15 +1145,15 @@ void SceneView::draw()
glPolygonStipple(patternHorzEven);
glEnable(GL_POLYGON_STIPPLE);
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
glRecti(_viewport->x(), _viewport->y(), _viewport->width(), _viewport->height());
glRecti(getViewport()->x(), getViewport()->y(), getViewport()->width(), getViewport()->height());
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
glDisable(GL_POLYGON_STIPPLE);
glEnable(GL_LIGHTING);
glEnable(GL_DEPTH_TEST);
_redrawInterlacedStereoStencilMask = false;
_interlacedStereoStencilWidth = _viewport->width();
_interlacedStereoStencilHeight = _viewport->height();
_interlacedStereoStencilWidth = getViewport()->width();
_interlacedStereoStencilHeight = getViewport()->height();
}
_renderStageLeft->setClearMask(_renderStageLeft->getClearMask() & ~(GL_STENCIL_BUFFER_BIT));
@@ -1155,7 +1185,7 @@ void SceneView::draw()
_renderStage->setReadBuffer(_drawBufferValue);
}
_localStateSet->setAttribute(_viewport.get());
_localStateSet->setAttribute(getViewport());
// ensure that all color planes are active.
@@ -1237,10 +1267,10 @@ bool SceneView::projectObjectIntoWindow(const osg::Vec3& object,osg::Vec3& windo
const osg::Matrix SceneView::computeMVPW() const
{
osg::Matrix matrix( _viewMatrix * _projectionMatrix);
osg::Matrix matrix( getViewMatrix() * getProjectionMatrix());
if (_viewport.valid())
matrix.postMult(_viewport->computeWindowMatrix());
if (getViewport())
matrix.postMult(getViewport()->computeWindowMatrix());
else
osg::notify(osg::WARN)<<"osg::Matrix SceneView::computeMVPW() - error no viewport attached to SceneView, coords will be computed inccorectly."<<std::endl;
@@ -1298,7 +1328,7 @@ bool SceneView::getProjectionMatrixAsOrtho(double& left, double& right,
double& bottom, double& top,
double& zNear, double& zFar) const
{
return _projectionMatrix.getOrtho(left, right,
return getProjectionMatrix().getOrtho(left, right,
bottom, top,
zNear, zFar);
}
@@ -1307,7 +1337,7 @@ bool SceneView::getProjectionMatrixAsFrustum(double& left, double& right,
double& bottom, double& top,
double& zNear, double& zFar) const
{
return _projectionMatrix.getFrustum(left, right,
return getProjectionMatrix().getFrustum(left, right,
bottom, top,
zNear, zFar);
}
@@ -1315,7 +1345,7 @@ bool SceneView::getProjectionMatrixAsFrustum(double& left, double& right,
bool SceneView::getProjectionMatrixAsPerspective(double& fovy,double& aspectRatio,
double& zNear, double& zFar) const
{
return _projectionMatrix.getPerspective(fovy, aspectRatio, zNear, zFar);
return getProjectionMatrix().getPerspective(fovy, aspectRatio, zNear, zFar);
}
void SceneView::setViewMatrixAsLookAt(const Vec3& eye,const Vec3& center,const Vec3& up)
@@ -1325,5 +1355,5 @@ void SceneView::setViewMatrixAsLookAt(const Vec3& eye,const Vec3& center,const V
void SceneView::getViewMatrixAsLookAt(Vec3& eye,Vec3& center,Vec3& up,float lookDistance) const
{
_viewMatrix.getLookAt(eye,center,up,lookDistance);
getViewMatrix().getLookAt(eye,center,up,lookDistance);
}