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Make return type from loadPagedModel explicit.
[simgear.git] / 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 <simgear/scene/util/SGReaderWriterOptions.hxx>
36 #include <boost/scoped_array.hpp>
37 #include <boost/foreach.hpp>
38
39 typedef std::map<std::string, osg::observer_ptr<simgear::Effect> > EffectMap;
40 static EffectMap lightEffectMap;
41
42 #define GET_COLOR_VALUE(n) \
43     SGVec4d( getConfig()->getDoubleValue(n "/r"), \
44                 getConfig()->getDoubleValue(n "/g"), \
45                 getConfig()->getDoubleValue(n "/b"), \
46                 getConfig()->getDoubleValue(n "/a") )
47
48 class SGLightAnimation::UpdateCallback : public osg::NodeCallback {
49 public:
50     UpdateCallback(const SGExpressiond* v, SGVec4d a, SGVec4d d, SGVec4d s) :
51         _ambient(a),
52         _diffuse(d),
53         _specular(s),
54         _animationValue(v)
55     {
56         _prev_value = -1;
57     }
58     virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
59     {
60         double dim = _animationValue->getValue();
61         if (dim != _prev_value) {
62             _prev_value = dim;
63             simgear::EffectGeode* geode = dynamic_cast<simgear::EffectGeode*>( node );
64             if (geode != 0) {
65                 osg::ref_ptr<simgear::Effect> effect = geode->getEffect();
66
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                     BOOST_FOREACH(osg::ref_ptr<simgear::Pass>& pass, technique->passes) {
73                         osg::Uniform* amb = pass->getUniform("Ambient");
74                         if (amb)
75                             amb->set(osg::Vec4f(_ambient.x() * dim, _ambient.y() * dim, _ambient.z() * dim, _ambient.w() * dim));
76                         osg::Uniform* dif = pass->getUniform("Diffuse");
77                         if (dif)
78                             dif->set(osg::Vec4f(_diffuse.x() * dim, _diffuse.y() * dim, _diffuse.z() * dim, _diffuse.w() * dim));
79                         osg::Uniform* spe = pass->getUniform("Specular");
80                         if (spe)
81                             spe->set(osg::Vec4f(_specular.x() * dim, _specular.y() * dim, _specular.z() * dim, _specular.w() * dim));
82                     }
83                 }
84             }
85         }
86         traverse(node, nv);
87     }
88 public:
89     SGVec4d _ambient;
90     SGVec4d _diffuse;
91     SGVec4d _specular;
92     SGSharedPtr<SGExpressiond const> _animationValue;
93     double _prev_value;
94 };
95
96 SGLightAnimation::SGLightAnimation(const SGPropertyNode* configNode,
97                                    SGPropertyNode* modelRoot,
98                                    const osgDB::Options* options,
99                                    const std::string &path, int i) :
100     SGAnimation(configNode, modelRoot),
101     _options(options)
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<std::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     parent.addChild(grp);
130     grp->setNodeMask( simgear::MODELLIGHT_BIT );
131     return grp;
132 }
133
134 void
135 SGLightAnimation::install(osg::Node& node)
136 {
137     SGAnimation::install(node);
138
139     bool cacheEffect = false;
140     osg::ref_ptr<simgear::Effect> effect;
141     EffectMap::iterator iter = lightEffectMap.end();
142     if (!_animationValue.valid()) { // Effects with animated properties should be singletons
143         iter = lightEffectMap.find(_key);
144         cacheEffect = true;
145     }
146
147     if (iter == lightEffectMap.end() || !iter->second.lock(effect)) {
148         SGPropertyNode_ptr effectProp = new SGPropertyNode;
149         if (_light_type == "spot") {
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         else if (_light_type == "point") {
170             makeChild(effectProp, "name")->setStringValue(_key);
171             makeChild(effectProp, "inherits-from")->setStringValue("Effects/light-point");
172             double dim = 1.0;
173             if (_animationValue.valid())
174                 dim = _animationValue->getValue();
175
176             SGPropertyNode* params = makeChild(effectProp, "parameters");
177             params->getNode("position",true)->setValue(SGVec4d(_position.x(),_position.y(),_position.z(),1.0));
178             params->getNode("ambient",true)->setValue(_ambient * dim);
179             params->getNode("diffuse",true)->setValue(_diffuse * dim);
180             params->getNode("specular",true)->setValue(_specular * dim);
181             params->getNode("attenuation",true)->setValue(_attenuation);
182             params->getNode("near",true)->setValue(_near);
183             params->getNode("far",true)->setValue(_far);
184         } else {
185             return;
186         }
187
188         effect = simgear::makeEffect(effectProp, true, dynamic_cast<const simgear::SGReaderWriterOptions*>(_options.get()));
189         if (iter == lightEffectMap.end() && cacheEffect)
190             lightEffectMap.insert(EffectMap::value_type(_key, effect));
191         else if (cacheEffect)
192             iter->second = effect;
193     } else {
194         effect = iter->second.get();
195     }
196
197     node.setNodeMask( simgear::MODELLIGHT_BIT );
198     simgear::EffectGeode* geode = dynamic_cast<simgear::EffectGeode*>(&node);
199     if (geode == 0) {
200         osg::Group* grp = node.asGroup();
201         if (grp != 0) {
202             for (size_t i=0; i<grp->getNumChildren(); ++i) {
203                 geode = dynamic_cast<simgear::EffectGeode*>(grp->getChild(i));
204                 if (geode) {
205                     geode->setNodeMask( simgear::MODELLIGHT_BIT );
206                     geode->setEffect(effect);
207                 }
208             }
209         }
210     }
211
212     if (geode != 0 && _animationValue.valid())
213         geode->setUpdateCallback(new UpdateCallback(_animationValue, _ambient, _diffuse, _specular));
214 }