Full implementation of the spotlight by Effects
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Frederic Bouvier
parent
d929323e93
commit
ec7e59eda1
@ -26,93 +26,106 @@
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#include <osg/MatrixTransform>
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#include <simgear/scene/material/EffectGeode.hxx>
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#include <boost/scoped_array.hpp>
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#include <simgear/scene/util/CopyOp.hxx>
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#define GET_COLOR_VALUE(n) \
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SGVec4d( getConfig()->getDoubleValue(n "/r"), \
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getConfig()->getDoubleValue(n "/g"), \
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getConfig()->getDoubleValue(n "/b"), \
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getConfig()->getDoubleValue(n "/a") )
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SGLightAnimation::SGLightAnimation(const SGPropertyNode* configNode,
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SGPropertyNode* modelRoot) :
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SGAnimation(configNode, modelRoot)
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{
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_position = SGVec3d( getConfig()->getDoubleValue("position/x"), getConfig()->getDoubleValue("position/y"), getConfig()->getDoubleValue("position/z") );
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_direction = SGVec3d( getConfig()->getDoubleValue("direction/x"), getConfig()->getDoubleValue("direction/y"), getConfig()->getDoubleValue("direction/z") );
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double l = length(_direction);
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if (l > 0.001) _direction /= l;
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_ambient = GET_COLOR_VALUE("ambient");
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_diffuse = GET_COLOR_VALUE("diffuse");
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_specular = GET_COLOR_VALUE("specular");
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_attenuation = SGVec3d( getConfig()->getDoubleValue("attenuation/c"), getConfig()->getDoubleValue("attenuation/l"), getConfig()->getDoubleValue("attenuation/q") );
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_exponent = getConfig()->getDoubleValue("exponent");
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_cutoff = getConfig()->getDoubleValue("cutoff");
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_near = getConfig()->getDoubleValue("near-m");
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_far = getConfig()->getDoubleValue("far-m");
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}
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osg::Group*
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SGLightAnimation::createAnimationGroup(osg::Group& parent)
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{
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osg::MatrixTransform* grp = new osg::MatrixTransform;
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osg::Vec3 position( getConfig()->getDoubleValue("position/x-m"),
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getConfig()->getDoubleValue("position/y-m"),
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getConfig()->getDoubleValue("position/z-m") );
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grp->setMatrix(osg::Matrix::translate(position));
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parent.addChild(grp);
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grp->setNodeMask( simgear::MODELLIGHT_BIT );
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return grp;
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grp->setMatrix(osg::Matrix::translate(toOsg(_position)));
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parent.addChild(grp);
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grp->setNodeMask( simgear::MODELLIGHT_BIT );
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return grp;
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}
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void
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SGLightAnimation::install(osg::Node& node)
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{
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SGAnimation::install(node);
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SGAnimation::install(node);
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std::string light_type = getConfig()->getStringValue("light-type");
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if (light_type == "spot") {
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osg::Vec3 axis( getConfig()->getDoubleValue("axis/x"),
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getConfig()->getDoubleValue("axis/y"),
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getConfig()->getDoubleValue("axis/z") );
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double l = axis.length();
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if (l < 0.001) return;
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axis /= l;
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std::string light_type = getConfig()->getStringValue("light-type");
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if (light_type == "spot") {
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osg::Vec3 p1( axis.z(), axis.x(), axis.y() ),
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p2 = axis ^ p1;
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p1 = p2 ^ axis;
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SGVec3d p1( _direction.z(), _direction.x(), _direction.y() ),
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p2 = cross( _direction, p1 );
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p1 = cross( p2, _direction );
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float n = getConfig()->getFloatValue("near-m"),
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f = getConfig()->getFloatValue("far-m"),
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a1 = getConfig()->getFloatValue("angle-inner-deg"),
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a2 = getConfig()->getFloatValue("angle-outer-deg"),
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r1 = n * tan( a2 * SG_DEGREES_TO_RADIANS ),
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r2 = f * tan( a2 * SG_DEGREES_TO_RADIANS );
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float r2 = _far * tan( _cutoff * SG_DEGREES_TO_RADIANS );
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osg::Geometry* cone = new osg::Geometry;
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osg::Geometry* cone = new osg::Geometry;
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cone->setUseDisplayList(false);
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osg::Vec3Array* vertices = new osg::Vec3Array(36);
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(*vertices)[0] = osg::Vec3(0.0,0.0,0.0);
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for (int i=0; i<16; ++i) {
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(*vertices)[16-i] = axis*f + p1*r2*cos( i * 2 * M_PI / 16 ) + p2*r2*sin( i * 2 * M_PI / 16 );
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osg::Vec3Array* vertices = new osg::Vec3Array(34);
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(*vertices)[0] = osg::Vec3(0.0,0.0,0.0);
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for (int i=0; i<16; ++i) {
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(*vertices)[16-i] = toOsg(_direction)*_far + toOsg(p1)*r2*cos( i * 2 * M_PI / 16 ) + toOsg(p2)*r2*sin( i * 2 * M_PI / 16 );
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}
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(*vertices)[17] = (*vertices)[1];
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// Bottom
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for (int i=0; i<16; ++i) {
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(*vertices)[18+i] = toOsg(_direction)*_far + toOsg(p1)*r2*cos( i * 2 * M_PI / 16 ) + toOsg(p2)*r2*sin( i * 2 * M_PI / 16 );
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}
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osg::Vec4Array* colours = new osg::Vec4Array(1);
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(*colours)[0] = osg::Vec4d(toOsg(getConfig()->getValue<SGVec3d>("diffuse")), 1.0f);
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cone->setColorArray(colours);
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cone->setColorBinding(osg::Geometry::BIND_OVERALL);
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osg::Vec3Array* normals = new osg::Vec3Array(1);
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(*normals)[0] = toOsg(_direction);
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cone->setNormalArray(normals);
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cone->setNormalBinding(osg::Geometry::BIND_OVERALL);
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cone->setVertexArray(vertices);
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cone->addPrimitiveSet( new osg::DrawArrays( GL_TRIANGLE_FAN, 0, 18 ) );
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cone->addPrimitiveSet( new osg::DrawArrays( GL_TRIANGLE_FAN, 18, 16 ) );
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simgear::EffectGeode* geode = new simgear::EffectGeode;
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geode->addDrawable( cone );
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node.asGroup()->addChild( geode );
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// TODO: build a cache - problem: what is the key ?
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SGPropertyNode_ptr effectProp = new SGPropertyNode;
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makeChild(effectProp, "inherits-from")->setStringValue("Effects/light-spot");
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SGPropertyNode* params = makeChild(effectProp, "parameters");
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params->getNode("light-spot/position",true)->setValue(SGVec4d(_position.x(),_position.y(),_position.z(),1.0));
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params->getNode("light-spot/direction",true)->setValue(SGVec4d(_direction.x(),_direction.y(),_direction.z(),0.0));
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params->getNode("light-spot/ambient",true)->setValue(_ambient);
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params->getNode("light-spot/diffuse",true)->setValue(_diffuse);
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params->getNode("light-spot/specular",true)->setValue(_specular);
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params->getNode("light-spot/attenuation",true)->setValue(_attenuation);
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params->getNode("light-spot/exponent",true)->setValue(_exponent);
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params->getNode("light-spot/cutoff",true)->setValue(_cutoff);
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params->getNode("light-spot/cosCutoff",true)->setValue( cos(_cutoff*SG_DEGREES_TO_RADIANS) );
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params->getNode("light-spot/near",true)->setValue(_near);
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params->getNode("light-spot/far",true)->setValue(_far);
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simgear::Effect* effect = simgear::makeEffect(effectProp, true);
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geode->setEffect(effect);
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}
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(*vertices)[17] = (*vertices)[1];
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// Bottom
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(*vertices)[18] = axis*f;
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for (int i=0; i<16; ++i) {
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(*vertices)[19+i] = axis*f + p1*r2*cos( i * 2 * M_PI / 16 ) + p2*r2*sin( i * 2 * M_PI / 16 );
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}
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(*vertices)[35] = (*vertices)[19];
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osg::Vec4Array* colours = new osg::Vec4Array(1);
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(*colours)[0].set( getConfig()->getFloatValue("color/red"),
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getConfig()->getFloatValue("color/green"),
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getConfig()->getFloatValue("color/blue"),
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1.0f);
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cone->setColorArray(colours);
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cone->setColorBinding(osg::Geometry::BIND_OVERALL);
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osg::Vec3Array* normals = new osg::Vec3Array(1);
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(*normals)[0] = axis;
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cone->setNormalArray(normals);
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cone->setNormalBinding(osg::Geometry::BIND_OVERALL);
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cone->setVertexArray(vertices);
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cone->addPrimitiveSet( new osg::DrawArrays( GL_TRIANGLE_FAN, 0, 18 ) );
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cone->addPrimitiveSet( new osg::DrawArrays( GL_TRIANGLE_FAN, 18, 18 ) );
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simgear::EffectGeode* geode = new simgear::EffectGeode;
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geode->addDrawable( cone );
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node.asGroup()->addChild( geode );
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simgear::Effect *effect = simgear::makeEffect("Effects/light-spot", true);
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if (effect) {
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effect->parametersProp->setFloatValue("inner-angle",getConfig()->getFloatValue("angle-inner-deg"));
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effect->parametersProp->setFloatValue("outer-angle",getConfig()->getFloatValue("angle-outer-deg"));
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geode->setEffect(effect);
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}
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}
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}
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@ -355,6 +355,16 @@ public:
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virtual osg::Group* createAnimationGroup(osg::Group& parent);
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virtual void install(osg::Node& node);
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private:
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SGVec3d _position;
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SGVec3d _direction;
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SGVec4d _ambient;
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SGVec4d _diffuse;
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SGVec4d _specular;
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SGVec3d _attenuation;
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double _exponent;
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double _cutoff;
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double _near;
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double _far;
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};
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#endif // _SG_ANIMATION_HXX
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