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                         if (amb)
  76                             amb->set(toOsg(_ambient) * dim);
  77                         osg::Uniform* dif = pass->getUniform("Diffuse");
  78                         if (dif)
  79                             dif->set(toOsg(_diffuse) * dim);
  80                         osg::Uniform* spe = pass->getUniform("Specular");
  81                         if (spe)
  82                             spe->set(toOsg(_specular) * dim);
  83                     }
  84                 }
  85             }
  86         }
  87         traverse(node, nv);
  88     }
  89 public:
  90     string _key;
  91     SGVec4d _ambient;
  92     SGVec4d _diffuse;
  93     SGVec4d _specular;
  94     SGSharedPtr<SGExpressiond const> _animationValue;
  95
  96     typedef std::map<string, double> PrevValueMap;
  97     static PrevValueMap _prev_values;
  98 };
  99 SGLightAnimation::UpdateCallback::PrevValueMap SGLightAnimation::UpdateCallback::_prev_values;
 100
 101 SGLightAnimation::SGLightAnimation(const SGPropertyNode* configNode,
 102                                    SGPropertyNode* modelRoot,
 103                                    const string &path, int i) :
 104     SGAnimation(configNode, modelRoot)
 105 {
 106     _light_type = getConfig()->getStringValue("light-type");
 107     _position = SGVec3d( getConfig()->getDoubleValue("position/x"), getConfig()->getDoubleValue("position/y"), getConfig()->getDoubleValue("position/z") );
 108     _direction = SGVec3d( getConfig()->getDoubleValue("direction/x"), getConfig()->getDoubleValue("direction/y"), getConfig()->getDoubleValue("direction/z") );
 109     double l = length(_direction);
 110     if (l > 0.001) _direction /= l;
 111     _ambient = GET_COLOR_VALUE("ambient");
 112     _diffuse = GET_COLOR_VALUE("diffuse");
 113     _specular = GET_COLOR_VALUE("specular");
 114     _attenuation = SGVec3d( getConfig()->getDoubleValue("attenuation/c"), getConfig()->getDoubleValue("attenuation/l"), getConfig()->getDoubleValue("attenuation/q") );
 115     _exponent = getConfig()->getDoubleValue("exponent");
 116     _cutoff = getConfig()->getDoubleValue("cutoff");
 117     _near = getConfig()->getDoubleValue("near-m");
 118     _far = getConfig()->getDoubleValue("far-m");
 119     _key = path + ";" + boost::lexical_cast<string>( i );
 120
 121     SGConstPropertyNode_ptr dim_factor = configNode->getChild("dim-factor");
 122     if (dim_factor.valid()) {
 123         _animationValue = read_value(dim_factor, modelRoot, "", 0, 1);
 124     }
 125 }
 126
 127 osg::Group*
 128 SGLightAnimation::createAnimationGroup(osg::Group& parent)
 129 {
 130     osg::Group* grp = new osg::Group;
 131     grp->setName("light animation node");
 132     if (_animationValue.valid())
 133         grp->setUpdateCallback(new UpdateCallback(_key, _animationValue, _ambient, _diffuse, _specular));
 134     parent.addChild(grp);
 135     grp->setNodeMask( simgear::MODELLIGHT_BIT );
 136     return grp;
 137 }
 138
 139 void
 140 SGLightAnimation::install(osg::Node& node)
 141 {
 142     SGAnimation::install(node);
 143
 144     if (_light_type == "spot") {
 145
 146         simgear::Effect* effect = 0;
 147         EffectMap::iterator iter = lightEffectMap.find(_key);
 148         if (iter == lightEffectMap.end()) {
 149             SGPropertyNode_ptr effectProp = new SGPropertyNode;
 150             makeChild(effectProp, "name")->setStringValue(_key);
 151             makeChild(effectProp, "inherits-from")->setStringValue("Effects/light-spot");
 152             double dim = 1.0;
 153             if (_animationValue.valid())
 154                 dim = _animationValue->getValue();
 155
 156             SGPropertyNode* params = makeChild(effectProp, "parameters");
 157             params->getNode("position",true)->setValue(SGVec4d(_position.x(),_position.y(),_position.z(),1.0));
 158             params->getNode("direction",true)->setValue(SGVec4d(_direction.x(),_direction.y(),_direction.z(),0.0));
 159             params->getNode("ambient",true)->setValue(_ambient * dim);
 160             params->getNode("diffuse",true)->setValue(_diffuse * dim);
 161             params->getNode("specular",true)->setValue(_specular * dim);
 162             params->getNode("attenuation",true)->setValue(_attenuation);
 163             params->getNode("exponent",true)->setValue(_exponent);
 164             params->getNode("cutoff",true)->setValue(_cutoff);
 165             params->getNode("cosCutoff",true)->setValue( cos(_cutoff*SG_DEGREES_TO_RADIANS) );
 166             params->getNode("near",true)->setValue(_near);
 167             params->getNode("far",true)->setValue(_far);
 168
 169             effect = simgear::makeEffect(effectProp, true);
 170             lightEffectMap.insert(EffectMap::value_type(_key, effect));
 171         } else {
 172             effect = iter->second.get();
 173         }
 174
 175         node.setNodeMask( simgear::MODELLIGHT_BIT );
 176         simgear::EffectGeode* geode = dynamic_cast<simgear::EffectGeode*>(&node);
 177         if (geode == 0) {
 178             osg::Group* grp = node.asGroup();
 179             if (grp != 0) {
 180                 for (size_t i=0; i<grp->getNumChildren(); ++i) {
 181                     geode = dynamic_cast<simgear::EffectGeode*>(grp->getChild(i));
 182                     if (geode)
 183                         geode->setEffect(effect);
 184                 }
 185             }
 186         }
 187     }
 188     else if (_light_type == "point") {
 189
 190         simgear::Effect* effect = 0;
 191         EffectMap::iterator iter = lightEffectMap.find(_key);
 192         if (iter == lightEffectMap.end()) {
 193             SGPropertyNode_ptr effectProp = new SGPropertyNode;
 194             makeChild(effectProp, "name")->setStringValue(_key);
 195             makeChild(effectProp, "inherits-from")->setStringValue("Effects/light-point");
 196             double dim = 1.0;
 197             if (_animationValue.valid())
 198                 dim = _animationValue->getValue();
 199
 200             SGPropertyNode* params = makeChild(effectProp, "parameters");
 201             params->getNode("position",true)->setValue(SGVec4d(_position.x(),_position.y(),_position.z(),1.0));
 202             params->getNode("ambient",true)->setValue(_ambient * dim);
 203             params->getNode("diffuse",true)->setValue(_diffuse * dim);
 204             params->getNode("specular",true)->setValue(_specular * dim);
 205             params->getNode("attenuation",true)->setValue(_attenuation);
 206             params->getNode("near",true)->setValue(_near);
 207             params->getNode("far",true)->setValue(_far);
 208
 209             effect = simgear::makeEffect(effectProp, true);
 210             lightEffectMap.insert(EffectMap::value_type(_key, effect));
 211         } else {
 212             effect = iter->second.get();
 213         }
 214
 215         node.setNodeMask( simgear::MODELLIGHT_BIT );
 216         simgear::EffectGeode* geode = dynamic_cast<simgear::EffectGeode*>(&node);
 217         if (geode == 0) {
 218             osg::Group* grp = node.asGroup();
 219             if (grp != 0) {
 220                 for (size_t i=0; i<grp->getNumChildren(); ++i) {
 221                     geode = dynamic_cast<simgear::EffectGeode*>(grp->getChild(i));
 222                     if (geode)
 223                         geode->setEffect(effect);
 224                 }
 225             }
 226         }
 227     }
 228 }