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Introduced the ability to switch between different visual properties in osgVolume

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This commit is contained in:
Robert Osfield
2009-01-21 11:46:03 +00:00
parent f23f2c351f
commit 1c88753551
4 changed files with 324 additions and 39 deletions
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129
src/osgVolume/Property.cpp
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@@ -48,6 +48,21 @@ void CompositeProperty::clear()
_properties.clear();
}
/////////////////////////////////////////////////////////////////////////////
//
// SwitchProperty
//
SwitchProperty::SwitchProperty()
{
}
SwitchProperty::SwitchProperty(const SwitchProperty& switchProperty, const osg::CopyOp& copyop):
CompositeProperty(switchProperty,copyop),
_activeProperty(switchProperty._activeProperty)
{
}
/////////////////////////////////////////////////////////////////////////////
//
// TransferFunctionProperty
@@ -180,13 +195,14 @@ TransparencyProperty::TransparencyProperty(const TransparencyProperty& isp,const
/////////////////////////////////////////////////////////////////////////////
//
// CollectPropertiesVisitor
// PropertyVisitor
//
CollectPropertiesVisitor::CollectPropertiesVisitor() {}
PropertyVisitor::PropertyVisitor(bool traverseOnlyActiveChildren):
_traverseOnlyActiveChildren(traverseOnlyActiveChildren)
{
}
void CollectPropertiesVisitor::apply(Property&) {}
void CollectPropertiesVisitor::apply(CompositeProperty& cp)
void PropertyVisitor::apply(CompositeProperty& cp)
{
for(unsigned int i=0; i<cp.getNumProperties(); ++i)
{
@@ -194,6 +210,35 @@ void CollectPropertiesVisitor::apply(CompositeProperty& cp)
}
}
void PropertyVisitor::apply(SwitchProperty& sp)
{
if (_traverseOnlyActiveChildren)
{
if (sp.getActiveProperty()>=0 && sp.getActiveProperty()<static_cast<int>(sp.getNumProperties()))
{
sp.getProperty(sp.getActiveProperty())->accept(*this);
}
}
else
{
for(unsigned int i=0; i<sp.getNumProperties(); ++i)
{
sp.getProperty(i)->accept(*this);
}
}
}
/////////////////////////////////////////////////////////////////////////////
//
// CollectPropertiesVisitor
//
CollectPropertiesVisitor::CollectPropertiesVisitor(bool traverseOnlyActiveChildren):
PropertyVisitor(traverseOnlyActiveChildren)
{
}
void CollectPropertiesVisitor::apply(Property&) {}
void CollectPropertiesVisitor::apply(TransferFunctionProperty& tf) { _tfProperty = &tf; }
void CollectPropertiesVisitor::apply(ScalarProperty&) {}
void CollectPropertiesVisitor::apply(IsoSurfaceProperty& iso) { _isoProperty = &iso; }
@@ -204,12 +249,64 @@ void CollectPropertiesVisitor::apply(SampleDensityProperty& sdp) { _sampleDensit
void CollectPropertiesVisitor::apply(TransparencyProperty& tp) { _transparencyProperty = &tp; }
class CycleSwitchVisitor : public osgVolume::PropertyVisitor
{
public:
CycleSwitchVisitor(int delta):
PropertyVisitor(false),
_delta(delta),
_switchModified(true) {}
virtual void apply(SwitchProperty& sp)
{
if (sp.getNumProperties()>=2)
{
if (_delta>0)
{
int newValue = sp.getActiveProperty()+_delta;
if (newValue<static_cast<int>(sp.getNumProperties()))
{
sp.setActiveProperty(newValue);
}
else
{
sp.setActiveProperty(0);
}
_switchModified = true;
}
else // _delta<0
{
int newValue = sp.getActiveProperty()+_delta;
if (newValue>=0)
{
sp.setActiveProperty(newValue);
}
else
{
sp.setActiveProperty(sp.getNumProperties()-1);
}
_switchModified = true;
}
}
PropertyVisitor::apply(sp);
}
int _delta;
bool _switchModified;
};
/////////////////////////////////////////////////////////////////////////////
//
// PropertyAdjustmentCallback
//
PropertyAdjustmentCallback::PropertyAdjustmentCallback()
{
_cyleForwardKey = 'v';
_cyleBackwardKey = 'V';
_transparencyKey = 't';
_alphaFuncKey = 'a';
_sampleDensityKey = 'd';
@@ -264,16 +361,26 @@ bool PropertyAdjustmentCallback::handle(const osgGA::GUIEventAdapter& ea,osgGA::
}
case(osgGA::GUIEventAdapter::KEYDOWN):
{
if (ea.getKey()=='t') _updateTransparency = true;
if (ea.getKey()=='a') _updateAlphaCutOff = true;
if (ea.getKey()=='d') _updateSampleDensity = true;
if (ea.getKey()==_cyleForwardKey || ea.getKey()==_cyleBackwardKey)
{
CycleSwitchVisitor csv( (ea.getKey()==_cyleForwardKey) ? 1 : -1);
property->accept(csv);
if (csv._switchModified)
{
tile->setDirty(true);
tile->init();
}
}
else if (ea.getKey()==_transparencyKey) _updateTransparency = true;
else if (ea.getKey()==_alphaFuncKey) _updateAlphaCutOff = true;
else if (ea.getKey()==_sampleDensityKey) _updateSampleDensity = true;
break;
}
case(osgGA::GUIEventAdapter::KEYUP):
{
if (ea.getKey()=='t') _updateTransparency = false;
if (ea.getKey()=='a') _updateAlphaCutOff = false;
if (ea.getKey()=='d') _updateSampleDensity = false;
if (ea.getKey()==_transparencyKey) _updateTransparency = false;
else if (ea.getKey()==_alphaFuncKey) _updateAlphaCutOff = false;
else if (ea.getKey()==_sampleDensityKey) _updateSampleDensity = false;
break;
}
default: