298 lines
8 KiB
C++
298 lines
8 KiB
C++
// modelmgr.cxx - manage a collection of 3D models.
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// Written by David Megginson, started 2002.
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//
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// This file is in the Public Domain, and comes with no warranty.
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#ifdef _MSC_VER
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# pragma warning( disable: 4355 )
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#endif
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <simgear/compiler.h>
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#include <algorithm>
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#include <functional>
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#include <vector>
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#include <cstring>
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#include <simgear/scene/model/placement.hxx>
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#include <simgear/scene/model/modellib.hxx>
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#include <simgear/structure/exception.hxx>
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#include <Main/fg_props.hxx>
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#include <Scenery/scenery.hxx>
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#include "modelmgr.hxx"
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using std::vector;
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using namespace simgear;
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// OSGFIXME
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// extern SGShadowVolume *shadows;
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FGModelMgr::FGModelMgr ()
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: _models(fgGetNode("/models", true)),
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_listener(new Listener(this))
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{
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_models->addChangeListener(_listener);
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}
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FGModelMgr::~FGModelMgr ()
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{
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_models->removeChangeListener(_listener);
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delete _listener;
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for (unsigned int i = 0; i < _instances.size(); i++) {
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globals->get_scenery()->get_scene_graph()
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->removeChild(_instances[i]->model->getSceneGraph());
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delete _instances[i];
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}
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}
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void
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FGModelMgr::init ()
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{
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vector<SGPropertyNode_ptr> model_nodes = _models->getChildren("model");
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for (unsigned int i = 0; i < model_nodes.size(); i++)
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add_model(model_nodes[i]);
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}
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void
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FGModelMgr::add_model (SGPropertyNode * node)
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{
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SG_LOG(SG_AIRCRAFT, SG_INFO,
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"Adding model " << node->getStringValue("name", "[unnamed]"));
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const char *path = node->getStringValue("path", "Models/Geometry/glider.ac");
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osg::Node *object;
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try {
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object = SGModelLib::loadDeferredModel(path, globals->get_props());
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} catch (const sg_throwable& t) {
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SG_LOG(SG_AIRCRAFT, SG_ALERT, "Error loading " << path << ":\n "
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<< t.getFormattedMessage() << t.getOrigin());
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return;
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}
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Instance * instance = new Instance;
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SGModelPlacement *model = new SGModelPlacement;
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instance->model = model;
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instance->node = node;
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model->init( object );
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// Set position and orientation either
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// indirectly through property refs
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// or directly with static values.
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SGPropertyNode * child = node->getChild("longitude-deg-prop");
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if (child != 0)
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instance->lon_deg_node = fgGetNode(child->getStringValue(), true);
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else
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model->setLongitudeDeg(node->getDoubleValue("longitude-deg"));
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child = node->getChild("latitude-deg-prop");
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if (child != 0)
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instance->lat_deg_node = fgGetNode(child->getStringValue(), true);
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else
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model->setLatitudeDeg(node->getDoubleValue("latitude-deg"));
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child = node->getChild("elevation-ft-prop");
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if (child != 0)
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instance->elev_ft_node = fgGetNode(child->getStringValue(), true);
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else
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model->setElevationFt(node->getDoubleValue("elevation-ft"));
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child = node->getChild("roll-deg-prop");
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if (child != 0)
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instance->roll_deg_node = fgGetNode(child->getStringValue(), true);
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else
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model->setRollDeg(node->getDoubleValue("roll-deg"));
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child = node->getChild("pitch-deg-prop");
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if (child != 0)
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instance->pitch_deg_node = fgGetNode(child->getStringValue(), true);
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else
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model->setPitchDeg(node->getDoubleValue("pitch-deg"));
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child = node->getChild("heading-deg-prop");
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if (child != 0)
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instance->heading_deg_node = fgGetNode(child->getStringValue(), true);
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else
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model->setHeadingDeg(node->getDoubleValue("heading-deg"));
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// Add this model to the global scene graph
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globals->get_scenery()->get_scene_graph()->addChild(model->getSceneGraph());
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// Save this instance for updating
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add_instance(instance);
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}
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void
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FGModelMgr::bind ()
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{
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}
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void
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FGModelMgr::unbind ()
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{
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}
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namespace
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{
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double testNan(double val) throw (sg_range_exception)
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{
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if (SGMisc<double>::isNaN(val))
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throw sg_range_exception("value is nan");
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return val;
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}
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struct UpdateFunctor : public std::unary_function<FGModelMgr::Instance*, void>
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{
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void operator()(FGModelMgr::Instance* instance) const
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{
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SGModelPlacement* model = instance->model;
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double lon, lat, elev, roll, pitch, heading;
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lon = lat = elev = roll = pitch = heading = 0.0;
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try {
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// Optionally set position from properties
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if (instance->lon_deg_node != 0)
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lon = testNan(instance->lon_deg_node->getDoubleValue());
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if (instance->lat_deg_node != 0)
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lat = testNan(instance->lat_deg_node->getDoubleValue());
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if (instance->elev_ft_node != 0)
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elev = testNan(instance->elev_ft_node->getDoubleValue());
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// Optionally set orientation from properties
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if (instance->roll_deg_node != 0)
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roll = testNan(instance->roll_deg_node->getDoubleValue());
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if (instance->pitch_deg_node != 0)
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pitch = testNan(instance->pitch_deg_node->getDoubleValue());
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if (instance->heading_deg_node != 0)
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heading = testNan(instance->heading_deg_node->getDoubleValue());
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} catch (const sg_range_exception&) {
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const char *path = instance->node->getStringValue("path",
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"unknown");
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SG_LOG(SG_AIRCRAFT, SG_INFO, "Instance of model " << path
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<< " has invalid values");
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return;
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}
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// Optionally set position from properties
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if (instance->lon_deg_node != 0)
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model->setLongitudeDeg(lon);
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if (instance->lat_deg_node != 0)
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model->setLatitudeDeg(lat);
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if (instance->elev_ft_node != 0)
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model->setElevationFt(elev);
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// Optionally set orientation from properties
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if (instance->roll_deg_node != 0)
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model->setRollDeg(roll);
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if (instance->pitch_deg_node != 0)
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model->setPitchDeg(pitch);
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if (instance->heading_deg_node != 0)
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model->setHeadingDeg(heading);
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instance->model->update();
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}
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};
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}
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void
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FGModelMgr::update (double dt)
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{
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std::for_each(_instances.begin(), _instances.end(), UpdateFunctor());
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}
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void
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FGModelMgr::add_instance (Instance * instance)
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{
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_instances.push_back(instance);
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}
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void
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FGModelMgr::remove_instance (Instance * instance)
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{
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vector<Instance *>::iterator it;
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for (it = _instances.begin(); it != _instances.end(); it++) {
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if (*it == instance) {
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_instances.erase(it);
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delete instance;
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return;
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}
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}
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}
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////////////////////////////////////////////////////////////////////////
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// Implementation of FGModelMgr::Instance
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////////////////////////////////////////////////////////////////////////
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FGModelMgr::Instance::Instance ()
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: model(0),
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node(0),
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lon_deg_node(0),
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lat_deg_node(0),
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elev_ft_node(0),
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roll_deg_node(0),
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pitch_deg_node(0),
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heading_deg_node(0),
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shadow(false)
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{
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}
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FGModelMgr::Instance::~Instance ()
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{
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delete model;
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}
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////////////////////////////////////////////////////////////////////////
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// Implementation of FGModelMgr::Listener
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////////////////////////////////////////////////////////////////////////
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void
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FGModelMgr::Listener::childAdded(SGPropertyNode * parent, SGPropertyNode * child)
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{
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if (strcmp(parent->getName(), "model") || strcmp(child->getName(), "load"))
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return;
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_mgr->add_model(parent);
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}
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void
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FGModelMgr::Listener::childRemoved(SGPropertyNode * parent, SGPropertyNode * child)
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{
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if (strcmp(parent->getName(), "models") || strcmp(child->getName(), "model"))
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return;
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// search instance by node and remove it from scenegraph
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vector<Instance *>::iterator it = _mgr->_instances.begin();
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vector<Instance *>::iterator end = _mgr->_instances.end();
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for (; it != end; ++it) {
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Instance *instance = *it;
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if (instance->node != child)
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continue;
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_mgr->_instances.erase(it);
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osg::Node *branch = instance->model->getSceneGraph();
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// OSGFIXME
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// if (shadows && instance->shadow)
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// shadows->deleteOccluder(branch);
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globals->get_scenery()->get_scene_graph()->removeChild(branch);
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delete instance;
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break;
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}
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}
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// end of modelmgr.cxx
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