65 lines
1.4 KiB
C++
65 lines
1.4 KiB
C++
#include <osg/LightSource>
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using namespace osg;
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LightSource::LightSource():
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_value(StateAttribute::ON)
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{
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// switch off culling of light source nodes by default.
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setCullingActive(false);
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_dstate = osgNew StateSet;
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_light = osgNew Light;
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}
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LightSource::~LightSource()
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{
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// ref_ptr<> automactially decrements the reference count of attached lights.
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}
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void LightSource::setLight(StateAttribute* light)
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{
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_light = light;
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setLocalStateSetModes(_value);
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}
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// Set the GLModes on StateSet associated with the ClipPlanes.
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void LightSource::setStateSetModes(StateSet& stateset,const StateAttribute::GLModeValue value) const
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{
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if (_light.valid())
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{
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stateset.setAssociatedModes(_light.get(),value);
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}
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}
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void LightSource::setLocalStateSetModes(const StateAttribute::GLModeValue value)
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{
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if (!_dstate) _dstate = osgNew StateSet;
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_dstate->setAllToInherit();
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setStateSetModes(*_dstate,value);
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}
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const bool LightSource::computeBound() const
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{
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Group::computeBound();
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if (_light.valid())
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{
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const Light* light = dynamic_cast<const Light*>(_light.get());
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if (light)
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{
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const Vec4& pos = light->getPosition();
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if (pos[3]!=0.0f)
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{
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float div = 1.0f/pos[3];
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_bsphere.expandBy(Vec3(pos[0]*div,pos[1]*div,pos[2]*div));
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}
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}
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}
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_bsphere_computed = true;
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return true;
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}
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