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/props/vectorPropTemplates.hxx>
  30 #include <simgear/scene/material/EffectGeode.hxx>
  31 #include <simgear/scene/material/Technique.hxx>
  32 #include <simgear/scene/material/Pass.hxx>
  33 #include <simgear/scene/util/CopyOp.hxx>
  34 #include <simgear/scene/util/OsgMath.hxx>
  35 #include <boost/scoped_array.hpp>
  36 #include <boost/foreach.hpp>
  37
  38 typedef std::map<string, osg::observer_ptr<simgear::Effect> > EffectMap;
  39 static EffectMap lightEffectMap;
  40
  41 #define GET_COLOR_VALUE(n) \
  42     SGVec4d( getConfig()->getDoubleValue(n "/r"), \
  43                 getConfig()->getDoubleValue(n "/g"), \
  44                 getConfig()->getDoubleValue(n "/b"), \
  45                 getConfig()->getDoubleValue(n "/a") )
  46
  47 class SGLightAnimation::UpdateCallback : public osg::NodeCallback {
  48 public:
  49     UpdateCallback(string k, const SGExpressiond* v, SGVec4d a, SGVec4d d, SGVec4d s) :
  50         _key(k),
  51         _ambient(a),
  52         _diffuse(d),
  53         _specular(s),
  54         _animationValue(v)
  55     {
  56         _prev_values[k] = -1;
  57     }
  58     virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
  59     {
  60         double dim = _animationValue->getValue();
  61         if (dim != _prev_values[_key]) {
  62             _prev_values[_key] = dim;
  63
  64             osg::ref_ptr<simgear::Effect> effect;
  65             EffectMap::iterator iter = lightEffectMap.find(_key);
  66             if (iter != lightEffectMap.end() && iter->second.lock(effect)) {
  67                 SGPropertyNode* params = effect->parametersProp;
  68                 params->getNode("ambient")->setValue(_ambient * dim);
  69                 params->getNode("diffuse")->setValue(_diffuse * dim);
  70                 params->getNode("specular")->setValue(_specular * dim);
  71                 BOOST_FOREACH(osg::ref_ptr<simgear::Technique>& technique, effect->techniques)
  72                 {
  73                     BOOST_FOREACH(osg::ref_ptr<simgear::Pass>& pass, technique->passes)
  74                     {
  75                         osg::Uniform* amb = pass->getUniform("Ambient");
  76                         if (amb)
  77                             amb->set(toOsg(_ambient) * dim);
  78                         osg::Uniform* dif = pass->getUniform("Diffuse");
  79                         if (dif)
  80                             dif->set(toOsg(_diffuse) * dim);
  81                         osg::Uniform* spe = pass->getUniform("Specular");
  82                         if (spe)
  83                             spe->set(toOsg(_specular) * dim);
  84                     }
  85                 }
  86             }
  87         }
  88         traverse(node, nv);
  89     }
  90 public:
  91     string _key;
  92     SGVec4d _ambient;
  93     SGVec4d _diffuse;
  94     SGVec4d _specular;
  95     SGSharedPtr<SGExpressiond const> _animationValue;
  96
  97     typedef std::map<string, double> PrevValueMap;
  98     static PrevValueMap _prev_values;
  99 };
 100 SGLightAnimation::UpdateCallback::PrevValueMap SGLightAnimation::UpdateCallback::_prev_values;
 101
 102 SGLightAnimation::SGLightAnimation(const SGPropertyNode* configNode,
 103                                    SGPropertyNode* modelRoot,
 104                                    const string &path, int i) :
 105     SGAnimation(configNode, modelRoot)
 106 {
 107     _light_type = getConfig()->getStringValue("light-type");
 108     _position = SGVec3d( getConfig()->getDoubleValue("position/x"), getConfig()->getDoubleValue("position/y"), getConfig()->getDoubleValue("position/z") );
 109     _direction = SGVec3d( getConfig()->getDoubleValue("direction/x"), getConfig()->getDoubleValue("direction/y"), getConfig()->getDoubleValue("direction/z") );
 110     double l = length(_direction);
 111     if (l > 0.001) _direction /= l;
 112     _ambient = GET_COLOR_VALUE("ambient");
 113     _diffuse = GET_COLOR_VALUE("diffuse");
 114     _specular = GET_COLOR_VALUE("specular");
 115     _attenuation = SGVec3d( getConfig()->getDoubleValue("attenuation/c"), getConfig()->getDoubleValue("attenuation/l"), getConfig()->getDoubleValue("attenuation/q") );
 116     _exponent = getConfig()->getDoubleValue("exponent");
 117     _cutoff = getConfig()->getDoubleValue("cutoff");
 118     _near = getConfig()->getDoubleValue("near-m");
 119     _far = getConfig()->getDoubleValue("far-m");
 120     _key = path + ";" + boost::lexical_cast<string>( i );
 121
 122     SGConstPropertyNode_ptr dim_factor = configNode->getChild("dim-factor");
 123     if (dim_factor.valid()) {
 124         _animationValue = read_value(dim_factor, modelRoot, "", 0, 1);
 125     }
 126 }
 127
 128 osg::Group*
 129 SGLightAnimation::createAnimationGroup(osg::Group& parent)
 130 {
 131     osg::Group* grp = new osg::Group;
 132     grp->setName("light animation node");
 133     if (_animationValue.valid())
 134         grp->setUpdateCallback(new UpdateCallback(_key, _animationValue, _ambient, _diffuse, _specular));
 135     parent.addChild(grp);
 136     grp->setNodeMask( simgear::MODELLIGHT_BIT );
 137     return grp;
 138 }
 139
 140 void
 141 SGLightAnimation::install(osg::Node& node)
 142 {
 143     SGAnimation::install(node);
 144
 145     if (_light_type == "spot") {
 146
 147         osg::ref_ptr<simgear::Effect> effect;
 148         EffectMap::iterator iter = lightEffectMap.find(_key);
 149         if (iter == lightEffectMap.end() || !iter->second.lock(effect)) {
 150             SGPropertyNode_ptr effectProp = new SGPropertyNode;
 151             makeChild(effectProp, "name")->setStringValue(_key);
 152             makeChild(effectProp, "inherits-from")->setStringValue("Effects/light-spot");
 153             double dim = 1.0;
 154             if (_animationValue.valid())
 155                 dim = _animationValue->getValue();
 156
 157             SGPropertyNode* params = makeChild(effectProp, "parameters");
 158             params->getNode("position",true)->setValue(SGVec4d(_position.x(),_position.y(),_position.z(),1.0));
 159             params->getNode("direction",true)->setValue(SGVec4d(_direction.x(),_direction.y(),_direction.z(),0.0));
 160             params->getNode("ambient",true)->setValue(_ambient * dim);
 161             params->getNode("diffuse",true)->setValue(_diffuse * dim);
 162             params->getNode("specular",true)->setValue(_specular * dim);
 163             params->getNode("attenuation",true)->setValue(_attenuation);
 164             params->getNode("exponent",true)->setValue(_exponent);
 165             params->getNode("cutoff",true)->setValue(_cutoff);
 166             params->getNode("cosCutoff",true)->setValue( cos(_cutoff*SG_DEGREES_TO_RADIANS) );
 167             params->getNode("near",true)->setValue(_near);
 168             params->getNode("far",true)->setValue(_far);
 169
 170             effect = simgear::makeEffect(effectProp, true);
 171             if (iter==lightEffectMap.end())
 172                 lightEffectMap.insert(EffectMap::value_type(_key, effect));
 173             else
 174                 iter->second = effect;
 175         } else {
 176             effect = iter->second.get();
 177         }
 178
 179         node.setNodeMask( simgear::MODELLIGHT_BIT );
 180         simgear::EffectGeode* geode = dynamic_cast<simgear::EffectGeode*>(&node);
 181         if (geode == 0) {
 182             osg::Group* grp = node.asGroup();
 183             if (grp != 0) {
 184                 for (size_t i=0; i<grp->getNumChildren(); ++i) {
 185                     geode = dynamic_cast<simgear::EffectGeode*>(grp->getChild(i));
 186                     if (geode)
 187                         geode->setEffect(effect);
 188                 }
 189             }
 190         }
 191     }
 192     else if (_light_type == "point") {
 193
 194         osg::ref_ptr<simgear::Effect> effect;
 195         EffectMap::iterator iter = lightEffectMap.find(_key);
 196         if (iter == lightEffectMap.end() || !iter->second.lock(effect)) {
 197             SGPropertyNode_ptr effectProp = new SGPropertyNode;
 198             makeChild(effectProp, "name")->setStringValue(_key);
 199             makeChild(effectProp, "inherits-from")->setStringValue("Effects/light-point");
 200             double dim = 1.0;
 201             if (_animationValue.valid())
 202                 dim = _animationValue->getValue();
 203
 204             SGPropertyNode* params = makeChild(effectProp, "parameters");
 205             params->getNode("position",true)->setValue(SGVec4d(_position.x(),_position.y(),_position.z(),1.0));
 206             params->getNode("ambient",true)->setValue(_ambient * dim);
 207             params->getNode("diffuse",true)->setValue(_diffuse * dim);
 208             params->getNode("specular",true)->setValue(_specular * dim);
 209             params->getNode("attenuation",true)->setValue(_attenuation);
 210             params->getNode("near",true)->setValue(_near);
 211             params->getNode("far",true)->setValue(_far);
 212
 213             effect = simgear::makeEffect(effectProp, true);
 214             if (iter==lightEffectMap.end())
 215                 lightEffectMap.insert(EffectMap::value_type(_key, effect));
 216             else
 217                 iter->second = effect;
 218         } else {
 219             effect = iter->second.get();
 220         }
 221
 222         node.setNodeMask( simgear::MODELLIGHT_BIT );
 223         simgear::EffectGeode* geode = dynamic_cast<simgear::EffectGeode*>(&node);
 224         if (geode == 0) {
 225             osg::Group* grp = node.asGroup();
 226             if (grp != 0) {
 227                 for (size_t i=0; i<grp->getNumChildren(); ++i) {
 228                     geode = dynamic_cast<simgear::EffectGeode*>(grp->getChild(i));
 229                     if (geode)
 230                         geode->setEffect(effect);
 231                 }
 232             }
 233         }
 234     }
 235 }