void RigGeometry::accept(osg::NodeVisitor &nv)
{
if (!nv.validNodeMask(*this))
return;
nv.pushOntoNodePath(this);
if (nv.getVisitorType() == osg::NodeVisitor::CULL_VISITOR)
cull(&nv);
else if (nv.getVisitorType() == osg::NodeVisitor::UPDATE_VISITOR)
updateBounds(&nv);
else
nv.apply(*this);
nv.popFromNodePath();
}
void
PointDrawable::accept(osg::NodeVisitor& nv)
{
if (nv.validNodeMask(*this))
{
osgUtil::CullVisitor* cv = Culling::asCullVisitor(nv);
nv.pushOntoNodePath(this);
// inject our shared stateset into the cull visitor.
if (cv)
cv->pushStateSet(_sharedStateSet.get());
nv.apply(*this);
if (cv)
cv->popStateSet();
nv.popFromNodePath();
}
}
void
PixelAutoTransform::accept( osg::NodeVisitor& nv )
{
// optimization - don't bother with mathing if the node is hidden.
// (this occurs in Node::accept, which we override here)
if ( !nv.validNodeMask(*this) )
return;
bool resetLodScale = false;
double oldLodScale = 1.0;
if ( nv.getVisitorType() == osg::NodeVisitor::CULL_VISITOR )
{
// re-activate culling now that the first cull traversal has taken place.
this->setCullingActive( true );
osgUtil::CullVisitor* cv = dynamic_cast<osgUtil::CullVisitor*>(&nv);
if ( cv )
{
osg::Viewport::value_type width = _previousWidth;
osg::Viewport::value_type height = _previousHeight;
osg::Viewport* viewport = cv->getViewport();
if (viewport)
{
width = viewport->width();
height = viewport->height();
}
osg::Vec3d eyePoint = cv->getEyeLocal();
osg::Vec3d localUp = cv->getUpLocal();
osg::Vec3d position = getPosition();
const osg::Matrix& projection = *(cv->getProjectionMatrix());
bool doUpdate = _firstTimeToInitEyePoint || _dirty;
if ( !_firstTimeToInitEyePoint )
{
osg::Vec3d dv = _previousEyePoint - eyePoint;
if (dv.length2() > getAutoUpdateEyeMovementTolerance() * (eyePoint-getPosition()).length2())
{
doUpdate = true;
}
else
{
osg::Vec3d dupv = _previousLocalUp - localUp;
// rotating the camera only affects ROTATE_TO_*
if ((_autoRotateMode && dupv.length2() > getAutoUpdateEyeMovementTolerance()) ||
(width != _previousWidth || height != _previousHeight) ||
(projection != _previousProjection) ||
(position != _previousPosition) )
{
doUpdate = true;
}
}
}
_firstTimeToInitEyePoint = false;
if ( doUpdate )
{
if ( getAutoScaleToScreen() )
{
double radius =
_sizingNode.valid() ? _sizingNode->getBound().radius() :
getNumChildren() > 0 ? getChild(0)->getBound().radius() :
0.48;
double pixels = cv->pixelSize( getPosition(), radius );
double scaledMinPixels = _minPixels * _minimumScale;
double scale = pixels < scaledMinPixels ? scaledMinPixels / pixels : 1.0;
//OE_DEBUG << LC << "Pixels = " << pixels << ", minPix = " << _minPixels << ", scale = " << scale << std::endl;
setScale( scale );
}
_previousEyePoint = eyePoint;
_previousLocalUp = localUp;
_previousWidth = width;
_previousHeight = height;
_previousProjection = projection;
_previousPosition = position;
_matrixDirty = true;
}
if (_rotateInScreenSpace==true)
{
osg::Vec3d translation, scale;
osg::Quat rotation, so;
osg::RefMatrix& mvm = *(cv->getModelViewMatrix());
mvm.decompose( translation, rotation, scale, so );
// this will rotate the object into screen space.
osg::Quat toScreen( rotation.inverse() );
// we need to compensate for the "heading" of the camera, so compute that.
// From (http://goo.gl/9bjM4t).
// GEOCENTRIC ONLY!
const osg::Matrixd& view = cv->getCurrentCamera()->getViewMatrix();
osg::Matrixd viewInverse;
viewInverse.invert(view);
osg::Vec3d N(0, 0, 6356752); // north pole, more or less
osg::Vec3d b( -view(0,2), -view(1,2), -view(2,2) ); // look vector
osg::Vec3d E = osg::Vec3d(0,0,0)*viewInverse;
osg::Vec3d u = E; u.normalize();
// account for looking straight downish
if ( osg::equivalent(b*u, -1.0, 1e-4) )
{
// up vec becomes the look vec.
b = osg::Matrixd::transform3x3(view, osg::Vec3f(0.0,1.0,0.0));
b.normalize();
}
osg::Vec3d proj_d = b - u*(b*u);
osg::Vec3d n = N - E;
osg::Vec3d proj_n = n - u*(n*u);
osg::Vec3d proj_e = proj_n^u;
double cameraHeading = atan2(proj_e*proj_d, proj_n*proj_d);
//OE_NOTICE << "h=" << osg::RadiansToDegrees(cameraHeading) << std::endl;
while (cameraHeading < 0.0)
cameraHeading += osg::PI*2.0;
double objHeading = _screenSpaceRotationRadians;
while ( objHeading < 0.0 )
objHeading += osg::PI*2.0;
double finalRot = cameraHeading - objHeading;
while( finalRot > osg::PI )
finalRot -= osg::PI*2.0;
osg::Quat toRotation( finalRot, osg::Vec3(0,0,1) );
setRotation( toRotation * toScreen );
}
else if (_autoRotateMode==ROTATE_TO_SCREEN)
{
osg::Vec3d translation;
osg::Quat rotation;
osg::Vec3d scale;
osg::Quat so;
cv->getModelViewMatrix()->decompose( translation, rotation, scale, so );
setRotation(rotation.inverse());
}
else if (_autoRotateMode==ROTATE_TO_CAMERA)
{
osg::Vec3d PosToEye = _position - eyePoint;
osg::Matrix lookto = osg::Matrix::lookAt(
osg::Vec3d(0,0,0), PosToEye, localUp);
osg::Quat q;
q.set(osg::Matrix::inverse(lookto));
setRotation(q);
}
else if (_autoRotateMode==ROTATE_TO_AXIS)
{
osg::Matrix matrix;
osg::Vec3 ev(eyePoint - _position);
switch(_cachedMode)
{
case(AXIAL_ROT_Z_AXIS):
{
ev.z() = 0.0f;
float ev_length = ev.length();
if (ev_length>0.0f)
{
//float rotation_zrotation_z = atan2f(ev.x(),ev.y());
//mat.makeRotate(inRadians(rotation_z),0.0f,0.0f,1.0f);
float inv = 1.0f/ev_length;
float s = ev.x()*inv;
float c = -ev.y()*inv;
matrix(0,0) = c;
matrix(1,0) = -s;
matrix(0,1) = s;
matrix(1,1) = c;
}
break;
}
case(AXIAL_ROT_Y_AXIS):
{
ev.y() = 0.0f;
float ev_length = ev.length();
if (ev_length>0.0f)
{
//float rotation_zrotation_z = atan2f(ev.x(),ev.y());
//mat.makeRotate(inRadians(rotation_z),0.0f,0.0f,1.0f);
float inv = 1.0f/ev_length;
float s = -ev.z()*inv;
float c = ev.x()*inv;
matrix(0,0) = c;
matrix(2,0) = s;
matrix(0,2) = -s;
matrix(2,2) = c;
}
break;
}
case(AXIAL_ROT_X_AXIS):
{
ev.x() = 0.0f;
float ev_length = ev.length();
if (ev_length>0.0f)
{
//float rotation_zrotation_z = atan2f(ev.x(),ev.y());
//mat.makeRotate(inRadians(rotation_z),0.0f,0.0f,1.0f);
float inv = 1.0f/ev_length;
float s = -ev.z()*inv;
float c = -ev.y()*inv;
matrix(1,1) = c;
matrix(2,1) = -s;
matrix(1,2) = s;
matrix(2,2) = c;
}
break;
}
case(ROTATE_TO_AXIS): // need to implement
{
float ev_side = ev*_side;
float ev_normal = ev*_normal;
float rotation = atan2f(ev_side,ev_normal);
matrix.makeRotate(rotation,_axis);
break;
}
}
osg::Quat q;
q.set(matrix);
setRotation(q);
}
_dirty = false;
// update the LOD Scale based on the auto-scale.
const double xScale = getScale().x();
if (xScale != 1.0 && xScale != 0.0)
{
oldLodScale = cv->getLODScale();
resetLodScale = true;
cv->setLODScale( 1.0/xScale );
}
} // if (cv)
} // if is cull visitor
// finally, skip AT's accept and do Transform.
Transform::accept(nv);
// Reset the LOD scale if we changed it
if (resetLodScale)
{
osgUtil::CullVisitor* cv = dynamic_cast<osgUtil::CullVisitor*>(&nv);
if ( cv )
cv->setLODScale( oldLodScale );
}
}
