simgear/scene/model/SGLightAnimation.cxx

   1 // Copyright (C) 2011 Frederic Bouvier (fredfgfs01@free.fr)
   2 //
   3 // This library is free software; you can redistribute it and/or
   4 // modify it under the terms of the GNU Library General Public
   5 // License as published by the Free Software Foundation; either
   6 // version 2 of the License, or (at your option) any later version.
   7 //
   8 // This library is distributed in the hope that it will be useful,
   9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11 // Library General Public License for more details.
  12 //
  13 // You should have received a copy of the GNU General Public License
  14 // along with this program; if not, write to the Free Software
  15 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  16 //
  17
  18 #ifdef HAVE_CONFIG_H
  19 #  include <simgear_config.h>
  20 #endif
  21
  22 #include <boost/lexical_cast.hpp>
  23
  24 #include "animation.hxx"
  25 #include "ConditionNode.hxx"
  26
  27 #include <osg/Geometry>
  28 #include <osg/MatrixTransform>
  29 #include <simgear/scene/material/EffectGeode.hxx>
  30 #include <simgear/scene/material/Technique.hxx>
  31 #include <simgear/scene/material/Pass.hxx>
  32 #include <simgear/scene/util/CopyOp.hxx>
  33 #include <simgear/scene/util/OsgMath.hxx>
  34 #include <boost/scoped_array.hpp>
  35 #include <boost/foreach.hpp>
  36
  37 typedef std::map<string, osg::ref_ptr<simgear::Effect> > EffectMap;
  38 static EffectMap lightEffectMap;
  39
  40 #define GET_COLOR_VALUE(n) \
  41     SGVec4d( getConfig()->getDoubleValue(n "/r"), \
  42                 getConfig()->getDoubleValue(n "/g"), \
  43                 getConfig()->getDoubleValue(n "/b"), \
  44                 getConfig()->getDoubleValue(n "/a") )
  45
  46 class SGLightAnimation::UpdateCallback : public osg::NodeCallback {
  47 public:
  48     UpdateCallback(string k, const SGExpressiond* v, SGVec4d a, SGVec4d d, SGVec4d s) :
  49         _key(k),
  50         _ambient(a),
  51         _diffuse(d),
  52         _specular(s),
  53         _animationValue(v)
  54     {
  55         _prev_values[k] = -1;
  56     }
  57     virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
  58     {
  59         double dim = _animationValue->getValue();
  60         if (dim != _prev_values[_key]) {
  61             _prev_values[_key] = dim;
  62
  63             EffectMap::iterator iter = lightEffectMap.find(_key);
  64             if (iter != lightEffectMap.end()) {
  65                 simgear::Effect* effect = iter->second;
  66                 SGPropertyNode* params = effect->parametersProp;
  67                 params->getNode("ambient")->setValue(_ambient * dim);
  68                 params->getNode("diffuse")->setValue(_diffuse * dim);
  69                 params->getNode("specular")->setValue(_specular * dim);
  70                 BOOST_FOREACH(osg::ref_ptr<simgear::Technique>& technique, effect->techniques)
  71                 {
  72                     BOOST_FOREACH(osg::ref_ptr<simgear::Pass>& pass, technique->passes)
  73                     {
  74                         osg::Uniform* amb = pass->getUniform("Ambient");
  75                         amb->set(toOsg(_ambient) * dim);
  76                         osg::Uniform* dif = pass->getUniform("Diffuse");
  77                         dif->set(toOsg(_diffuse) * dim);
  78                         osg::Uniform* spe = pass->getUniform("Specular");
  79                         spe->set(toOsg(_specular) * dim);
  80                     }
  81                 }
  82             }
  83         }
  84         traverse(node, nv);
  85     }
  86 public:
  87     string _key;
  88     SGVec4d _ambient;
  89     SGVec4d _diffuse;
  90     SGVec4d _specular;
  91     SGSharedPtr<SGExpressiond const> _animationValue;
  92
  93     typedef std::map<string, double> PrevValueMap;
  94     static PrevValueMap _prev_values;
  95 };
  96 SGLightAnimation::UpdateCallback::PrevValueMap SGLightAnimation::UpdateCallback::_prev_values;
  97
  98 SGLightAnimation::SGLightAnimation(const SGPropertyNode* configNode,
  99                                    SGPropertyNode* modelRoot,
 100                                    const string &path, int i) :
 101     SGAnimation(configNode, modelRoot)
 102 {
 103     _light_type = getConfig()->getStringValue("light-type");
 104     _position = SGVec3d( getConfig()->getDoubleValue("position/x"), getConfig()->getDoubleValue("position/y"), getConfig()->getDoubleValue("position/z") );
 105     _direction = SGVec3d( getConfig()->getDoubleValue("direction/x"), getConfig()->getDoubleValue("direction/y"), getConfig()->getDoubleValue("direction/z") );
 106     double l = length(_direction);
 107     if (l > 0.001) _direction /= l;
 108     _ambient = GET_COLOR_VALUE("ambient");
 109     _diffuse = GET_COLOR_VALUE("diffuse");
 110     _specular = GET_COLOR_VALUE("specular");
 111     _attenuation = SGVec3d( getConfig()->getDoubleValue("attenuation/c"), getConfig()->getDoubleValue("attenuation/l"), getConfig()->getDoubleValue("attenuation/q") );
 112     _exponent = getConfig()->getDoubleValue("exponent");
 113     _cutoff = getConfig()->getDoubleValue("cutoff");
 114     _near = getConfig()->getDoubleValue("near-m");
 115     _far = getConfig()->getDoubleValue("far-m");
 116     _key = path + ";" + boost::lexical_cast<string>( i );
 117
 118     SGConstPropertyNode_ptr dim_factor = configNode->getChild("dim-factor");
 119     if (dim_factor.valid()) {
 120         _animationValue = read_value(dim_factor, modelRoot, "", 0, 1);
 121     }
 122 }
 123
 124 osg::Group*
 125 SGLightAnimation::createAnimationGroup(osg::Group& parent)
 126 {
 127     osg::Group* grp = new osg::Group;
 128     grp->setName("light animation node");
 129     if (_animationValue.valid())
 130         grp->setUpdateCallback(new UpdateCallback(_key, _animationValue, _ambient, _diffuse, _specular));
 131     parent.addChild(grp);
 132     grp->setNodeMask( simgear::MODELLIGHT_BIT );
 133     return grp;
 134 }
 135
 136 void
 137 SGLightAnimation::install(osg::Node& node)
 138 {
 139     SGAnimation::install(node);
 140
 141     if (_light_type == "spot") {
 142
 143         simgear::Effect* effect = 0;
 144         EffectMap::iterator iter = lightEffectMap.find(_key);
 145         if (iter == lightEffectMap.end()) {
 146             SGPropertyNode_ptr effectProp = new SGPropertyNode;
 147             makeChild(effectProp, "inherits-from")->setStringValue("Effects/light-spot");
 148             double dim = 1.0;
 149             if (_animationValue.valid())
 150                 dim = _animationValue->getValue();
 151
 152             SGPropertyNode* params = makeChild(effectProp, "parameters");
 153             params->getNode("position",true)->setValue(SGVec4d(_position.x(),_position.y(),_position.z(),1.0));
 154             params->getNode("direction",true)->setValue(SGVec4d(_direction.x(),_direction.y(),_direction.z(),0.0));
 155             params->getNode("ambient",true)->setValue(_ambient * dim);
 156             params->getNode("diffuse",true)->setValue(_diffuse * dim);
 157             params->getNode("specular",true)->setValue(_specular * dim);
 158             params->getNode("attenuation",true)->setValue(_attenuation);
 159             params->getNode("exponent",true)->setValue(_exponent);
 160             params->getNode("cutoff",true)->setValue(_cutoff);
 161             params->getNode("cosCutoff",true)->setValue( cos(_cutoff*SG_DEGREES_TO_RADIANS) );
 162             params->getNode("near",true)->setValue(_near);
 163             params->getNode("far",true)->setValue(_far);
 164
 165             effect = simgear::makeEffect(effectProp, true);
 166             lightEffectMap.insert(EffectMap::value_type(_key, effect));
 167         } else {
 168             effect = iter->second.get();
 169         }
 170
 171         node.setNodeMask( simgear::MODELLIGHT_BIT );
 172         simgear::EffectGeode* geode = dynamic_cast<simgear::EffectGeode*>(&node);
 173         if (geode == 0) {
 174             osg::Group* grp = node.asGroup();
 175             if (grp != 0) {
 176                 for (size_t i=0; i<grp->getNumChildren(); ++i) {
 177                     geode = dynamic_cast<simgear::EffectGeode*>(grp->getChild(i));
 178                     if (geode)
 179                         geode->setEffect(effect);
 180                 }
 181             }
 182         }
 183     }
 184     else if (_light_type == "point") {
 185
 186         simgear::Effect* effect = 0;
 187         EffectMap::iterator iter = lightEffectMap.find(_key);
 188         if (iter == lightEffectMap.end()) {
 189             SGPropertyNode_ptr effectProp = new SGPropertyNode;
 190             makeChild(effectProp, "inherits-from")->setStringValue("Effects/light-point");
 191             double dim = 1.0;
 192             if (_animationValue.valid())
 193                 dim = _animationValue->getValue();
 194
 195             SGPropertyNode* params = makeChild(effectProp, "parameters");
 196             params->getNode("position",true)->setValue(SGVec4d(_position.x(),_position.y(),_position.z(),1.0));
 197             params->getNode("ambient",true)->setValue(_ambient * dim);
 198             params->getNode("diffuse",true)->setValue(_diffuse * dim);
 199             params->getNode("specular",true)->setValue(_specular * dim);
 200             params->getNode("attenuation",true)->setValue(_attenuation);
 201             params->getNode("near",true)->setValue(_near);
 202             params->getNode("far",true)->setValue(_far);
 203
 204             effect = simgear::makeEffect(effectProp, true);
 205             lightEffectMap.insert(EffectMap::value_type(_key, effect));
 206         } else {
 207             effect = iter->second.get();
 208         }
 209
 210         node.setNodeMask( simgear::MODELLIGHT_BIT );
 211         simgear::EffectGeode* geode = dynamic_cast<simgear::EffectGeode*>(&node);
 212         if (geode == 0) {
 213             osg::Group* grp = node.asGroup();
 214             if (grp != 0) {
 215                 for (size_t i=0; i<grp->getNumChildren(); ++i) {
 216                     geode = dynamic_cast<simgear::EffectGeode*>(grp->getChild(i));
 217                     if (geode)
 218                         geode->setEffect(effect);
 219                 }
 220             }
 221         }
 222     }
 223 }