137 lines
5.2 KiB
C++
137 lines
5.2 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#include <osg/Light>
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#include <osg/StateSet>
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#include <osg/Notify>
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using namespace osg;
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Light::Light( void )
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{
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init();
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}
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Light::Light(unsigned int lightnum)
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{
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init();
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_lightnum = lightnum;
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}
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Light::~Light( void )
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{
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}
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void Light::init( void )
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{
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_lightnum = 0;
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_ambient.set(0.05f,0.05f,0.05f,1.0f);
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_diffuse.set(0.8f,0.8f,0.8f,1.0f);
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_specular.set(0.05f,0.05f,0.05f,1.0f);
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_position.set(0.0f,0.0f,1.0f,0.0f);
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_direction.set(0.0f,0.0f,-1.0f);
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_spot_exponent = 0.0f;
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_spot_cutoff = 180.0f;
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_constant_attenuation = 1.0f;
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_linear_attenuation = 0.0f;
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_quadratic_attenuation = 0.0f;
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// OSG_DEBUG << "_ambient "<<_ambient<<std::endl;
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// OSG_DEBUG << "_diffuse "<<_diffuse<<std::endl;
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// OSG_DEBUG << "_specular "<<_specular<<std::endl;
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// OSG_DEBUG << "_position "<<_position<<std::endl;
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// OSG_DEBUG << "_direction "<<_direction<<std::endl;
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// OSG_DEBUG << "_spot_exponent "<<_spot_exponent<<std::endl;
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// OSG_DEBUG << "_spot_cutoff "<<_spot_cutoff<<std::endl;
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// OSG_DEBUG << "_constant_attenuation "<<_constant_attenuation<<std::endl;
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// OSG_DEBUG << "_linear_attenuation "<<_linear_attenuation<<std::endl;
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// OSG_DEBUG << "_quadratic_attenuation "<<_quadratic_attenuation<<std::endl;
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}
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void Light::setLightNum(int num)
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{
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if (_lightnum==num) return;
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if (_parents.empty())
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{
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_lightnum = num;
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return;
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}
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// take a reference to this clip plane to prevent it from going out of scope
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// when we remove it temporarily from its parents.
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osg::ref_ptr<Light> lightRef = this;
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// copy the parents as they _parents list will be changed by the subsequent removeAttributes.
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ParentList parents = _parents;
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// remove this attribute from its parents as its position is being changed
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// and would no longer be valid.
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ParentList::iterator itr;
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for(itr = parents.begin();
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itr != parents.end();
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++itr)
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{
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osg::StateSet* stateset = *itr;
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stateset->removeAttribute(this);
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}
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// assign the hint target
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_lightnum = num;
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// add this attribute back into its original parents with its new position
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for(itr = parents.begin();
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itr != parents.end();
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++itr)
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{
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osg::StateSet* stateset = *itr;
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stateset->setAttribute(this);
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}
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}
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void Light::captureLightState()
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{
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#ifdef OSG_GL_FIXED_FUNCTION_AVAILABLE
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glGetLightfv( (GLenum)((int)GL_LIGHT0 + _lightnum), GL_AMBIENT, _ambient.ptr() );
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glGetLightfv( (GLenum)((int)GL_LIGHT0 + _lightnum), GL_DIFFUSE, _diffuse.ptr() );
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glGetLightfv( (GLenum)((int)GL_LIGHT0 + _lightnum), GL_SPECULAR, _specular.ptr() );
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glGetLightfv( (GLenum)((int)GL_LIGHT0 + _lightnum), GL_POSITION, _position.ptr() );
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glGetLightfv( (GLenum)((int)GL_LIGHT0 + _lightnum), GL_SPOT_DIRECTION, _direction.ptr() );
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glGetLightfv( (GLenum)((int)GL_LIGHT0 + _lightnum), GL_SPOT_EXPONENT, &_spot_exponent );
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glGetLightfv( (GLenum)((int)GL_LIGHT0 + _lightnum), GL_SPOT_CUTOFF, &_spot_cutoff );
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glGetLightfv( (GLenum)((int)GL_LIGHT0 + _lightnum), GL_CONSTANT_ATTENUATION, &_constant_attenuation );
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glGetLightfv( (GLenum)((int)GL_LIGHT0 + _lightnum), GL_LINEAR_ATTENUATION, &_linear_attenuation );
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glGetLightfv( (GLenum)((int)GL_LIGHT0 + _lightnum), GL_QUADRATIC_ATTENUATION, &_quadratic_attenuation );
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#else
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OSG_NOTICE<<"Warning: Light::captureLightState() - not supported."<<std::endl;
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#endif
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}
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void Light::apply(State&) const
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{
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#ifdef OSG_GL_FIXED_FUNCTION_AVAILABLE
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glLightfv( (GLenum)((int)GL_LIGHT0 + _lightnum), GL_AMBIENT, _ambient.ptr() );
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glLightfv( (GLenum)((int)GL_LIGHT0 + _lightnum), GL_DIFFUSE, _diffuse.ptr() );
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glLightfv( (GLenum)((int)GL_LIGHT0 + _lightnum), GL_SPECULAR, _specular.ptr() );
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glLightfv( (GLenum)((int)GL_LIGHT0 + _lightnum), GL_POSITION, _position.ptr() );
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glLightfv( (GLenum)((int)GL_LIGHT0 + _lightnum), GL_SPOT_DIRECTION, _direction.ptr() );
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glLightf ( (GLenum)((int)GL_LIGHT0 + _lightnum), GL_SPOT_EXPONENT, _spot_exponent );
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glLightf ( (GLenum)((int)GL_LIGHT0 + _lightnum), GL_SPOT_CUTOFF, _spot_cutoff );
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glLightf ( (GLenum)((int)GL_LIGHT0 + _lightnum), GL_CONSTANT_ATTENUATION, _constant_attenuation );
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glLightf ( (GLenum)((int)GL_LIGHT0 + _lightnum), GL_LINEAR_ATTENUATION, _linear_attenuation );
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glLightf ( (GLenum)((int)GL_LIGHT0 + _lightnum), GL_QUADRATIC_ATTENUATION, _quadratic_attenuation );
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#else
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OSG_NOTICE<<"Warning: Light::apply(State&) - not supported."<<std::endl;
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#endif
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}
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