better use unset() for unsetting ...

[flightgear.git] / src / Instrumentation / groundradar.cxx

diff --git a/src/Instrumentation/groundradar.cxx b/src/Instrumentation/groundradar.cxx
index 76933ec1b4cd7794dae48019d86a41b6d2fbaeb5..02f8ca1a461f2169827b43e12c8233fcac17455a 100644 (file)
--- a/src/Instrumentation/groundradar.cxx
+++ b/src/Instrumentation/groundradar.cxx
@@ -1,12 +1,12 @@
 //  groundradar.cxx - Background layer for the ATC radar.
 //
-//  Written by Csaba Halasz.
+//  Copyright (C) 2007 Csaba Halasz.
 //
 //  This program is free software; you can redistribute it and/or
 //  modify it under the terms of the GNU General Public License as
 //  published by the Free Software Foundation; either version 2 of the
 //  License, or (at your option) any later version.
-// 
+//
 //  This program is distributed in the hope that it will be useful, but
 //  WITHOUT ANY WARRANTY; without even the implied warranty of
 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
@@ -41,9 +41,12 @@
 
 #include "groundradar.hxx"
 
-static const char* airport_node_name = "/sim/tower/airport-id";
-static const char* texture_name = "Aircraft/Instruments/Textures/od_groundradar.rgb";
-static const char* radar_node_name = "/instrumentation/radar/range";
+static const char* airport_source_node_name = "airport-id-source";
+static const char* default_airport_node_name = "/sim/tower/airport-id";
+static const char* texture_node_name = "texture-name";
+static const char* default_texture_name = "Aircraft/Instruments/Textures/od_groundradar.rgb";
+static const char* range_source_node_name = "range-source";
+static const char* default_range_node_name = "/instrumentation/radar/range";
 
 struct SingleFrameCallback : public osg::Camera::DrawCallback
 {
@@ -55,23 +58,23 @@ struct SingleFrameCallback : public osg::Camera::DrawCallback
 
 GroundRadar::GroundRadar(SGPropertyNode *node)
 {
-    _airport_node = fgGetNode(airport_node_name, true);
-    _radar_node = fgGetNode(radar_node_name, true);
-    createTexture();
+    _airport_node = fgGetNode(node->getStringValue(airport_source_node_name, default_airport_node_name), true);
+    _range_node = fgGetNode(node->getStringValue(range_source_node_name, default_range_node_name), true);
+    createTexture(node->getStringValue(texture_node_name, default_texture_name));
     updateTexture();
     _airport_node->addChangeListener(this);
-    _radar_node->addChangeListener(this);
+    _range_node->addChangeListener(this);
 }
 
 GroundRadar::~GroundRadar()
 {
     _airport_node->removeChangeListener(this);
-    _radar_node->removeChangeListener(this);
+    _range_node->removeChangeListener(this);
 }
 
 void GroundRadar::valueChanged(SGPropertyNode*)
 {
-    updateTexture();    
+    updateTexture();
 }
 
 inline static osg::Vec3 fromPolar(double fi, double r)
@@ -79,27 +82,27 @@ inline static osg::Vec3 fromPolar(double fi, double r)
     return osg::Vec3(sin(fi * SGD_DEGREES_TO_RADIANS) * r, cos(fi * SGD_DEGREES_TO_RADIANS) * r, 0);
 }
 
-void GroundRadar::createTexture()
-{        
+void GroundRadar::createTexture(const char* texture_name)
+{
     setSize(512);
     allocRT();
-    
+
     osg::Vec4Array* colors = new osg::Vec4Array;
-    colors->push_back(osg::Vec4(0.0f,0.5f,0.0f,1.0f));
-    colors->push_back(osg::Vec4(0.0f,0.5f,0.5f,1.0f));
-        
+    colors->push_back(osg::Vec4(0.0f, 0.5f, 0.0f, 1.0f));
+    colors->push_back(osg::Vec4(0.0f, 0.5f, 0.5f, 1.0f));
+
     _geom = new osg::Geometry();
     _geom->setColorArray(colors);
     _geom->setColorBinding(osg::Geometry::BIND_PER_PRIMITIVE_SET);
     _geom->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::QUADS, 0, 0));
     _geom->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::QUADS, 0, 0));
 
-    osg::Geode* geode = new osg::Geode();        
+    osg::Geode* geode = new osg::Geode();
     osg::StateSet* stateset = geode->getOrCreateStateSet();
     stateset->setMode(GL_BLEND, osg::StateAttribute::OFF);
     geode->addDrawable(_geom.get());
 
-    osg::Camera* camera = getCamera();        
+    osg::Camera* camera = getCamera();
     camera->setPostDrawCallback(new SingleFrameCallback());
     camera->addChild(geode);
     camera->setNodeMask(0);
@@ -118,16 +121,19 @@ void GroundRadar::updateTexture()
     FGRunwayList* runways = globals->get_runways();
 
     const FGAirport* airport = fgFindAirportID(airport_name);
+    if (airport == 0)
+        return;
+
     const SGGeod& tower_location = airport->getTowerLocation();
     const double tower_lat = tower_location.getLatitudeDeg();
     const double tower_lon = tower_location.getLongitudeDeg();
-    double scale = SG_METER_TO_NM * 200 / _radar_node->getDoubleValue();
+    double scale = SG_METER_TO_NM * 200 / _range_node->getDoubleValue();
 
-    for(FGRunway runway = runways->search(airport_name); runway._id == airport_name; runway = runways->next())
+    for (FGRunway runway = runways->search(airport_name); runway._id == airport_name; runway = runways->next())
     {
         double az1, az2, dist_m;
         geo_inverse_wgs_84(tower_lat, tower_lon, runway._lat, runway._lon, &az1, &az2, &dist_m);
-            
+
         osg::Vec3 center = fromPolar(az1, dist_m * scale) + osg::Vec3(256, 256, 0);
         osg::Vec3 leftcenter = fromPolar(runway._heading, runway._length * SG_FEET_TO_METER * scale / 2) + center;
         osg::Vec3 lefttop = fromPolar(runway._heading - 90, runway._width * SG_FEET_TO_METER * scale / 2) + leftcenter;
@@ -141,7 +147,7 @@ void GroundRadar::updateTexture()
         vertices->push_back(rightbottom);
         vertices->push_back(righttop);
     }
-        
+
     osg::Vec3Array* vertices = new osg::Vec3Array(*taxi_vertices.get());
     vertices->insert(vertices->end(), rwy_vertices->begin(), rwy_vertices->end());
     _geom->setVertexArray(vertices);
@@ -150,7 +156,7 @@ void GroundRadar::updateTexture()
     taxi->setCount(taxi_vertices->size());
     rwy->setFirst(taxi_vertices->size());
     rwy->setCount(rwy_vertices->size());
-    
+
     getCamera()->setNodeMask(0xffffffff);
 }