From 794553700fa644ce05c1f8058361f99a11e875bf Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Mon, 19 Mar 2007 10:38:44 +0000
Subject: [PATCH] Further work on osgterrain example

---
 examples/osgterrain/osgterrain.cpp | 138 ++++++++---------------------
 1 file changed, 39 insertions(+), 99 deletions(-)

diff --git a/examples/osgterrain/osgterrain.cpp b/examples/osgterrain/osgterrain.cpp
index 8a31f4b44..865b77bc6 100644
--- a/examples/osgterrain/osgterrain.cpp
+++ b/examples/osgterrain/osgterrain.cpp
@@ -8,125 +8,65 @@
 #include <osg/MatrixTransform>
 #include <osg/CoordinateSystemNode>
 #include <osg/ClusterCullingCallback>
+#include <osg/ArgumentParser>
 
 #include <osgDB/FileUtils>
 #include <osgDB/ReadFile>
 
 #include <osgText/FadeText>
 
-#include <osgSim/OverlayNode>
-#include <osgSim/SphereSegment>
-
-#include <osgGA/TerrainManipulator>
+#include <osgTerrain/TerrainNode>
+#include <osgTerrain/Layer>
 
 #include <iostream>
 
-osg::Node* createEarth()
+
+int main(int argc, char** argv)
 {
-    osg::TessellationHints* hints = new osg::TessellationHints;
-    hints->setDetailRatio(5.0f);
+    osg::ArgumentParser arguments(&argc, argv);
 
-    
-    osg::ShapeDrawable* sd = new osg::ShapeDrawable(new osg::Sphere(osg::Vec3(0.0,0.0,0.0), osg::WGS_84_RADIUS_POLAR), hints);
-    
-    osg::Geode* geode = new osg::Geode;
-    geode->addDrawable(sd);
-    
-    std::string filename = osgDB::findDataFile("Images/land_shallow_topo_2048.jpg");
-    geode->getOrCreateStateSet()->setTextureAttributeAndModes(0, new osg::Texture2D(osgDB::readImageFile(filename)));
-    
-    osg::CoordinateSystemNode* csn = new osg::CoordinateSystemNode;
-    csn->setEllipsoidModel(new osg::EllipsoidModel());
-    csn->addChild(geode);
-    
-    return csn;
-    
-}
-
-osgText::Text* createText(osg::EllipsoidModel* ellipsoid, double latitude, double longitude, double height, const std::string& str)
-{
-    double X,Y,Z;
-    ellipsoid->convertLatLongHeightToXYZ( osg::DegreesToRadians(latitude), osg::DegreesToRadians(longitude), height, X, Y, Z);
-
-
-    osgText::Text* text = new osgText::FadeText;
-
-    osg::Vec3 normal = ellipsoid->computeLocalUpVector( X, Y, Z);
-    text->setCullCallback(new osg::ClusterCullingCallback(osg::Vec3(X,Y,Z), normal, 0.0));
-
-    text->setText(str);
-    text->setFont("fonts/arial.ttf");
-    text->setPosition(osg::Vec3(X,Y,Z));
-    text->setCharacterSize(300000.0f);
-    text->setCharacterSizeMode(osgText::Text::OBJECT_COORDS_WITH_MAXIMUM_SCREEN_SIZE_CAPPED_BY_FONT_HEIGHT);
-    text->setAutoRotateToScreen(true);
-    
-    return text;
-}
-
-osg::Node* createFadeText(osg::EllipsoidModel* ellipsoid)
-{
-    osg::Group* group = new osg::Group;
-
-    group->getOrCreateStateSet()->setMode(GL_DEPTH_TEST,osg::StateAttribute::OFF);
-    
-    osg::Geode* geode = new osg::Geode;
-    group->addChild(geode);
-    
-    std::vector<std::string> textList;
-    textList.push_back("Town");
-    textList.push_back("City");
-    textList.push_back("Village");
-    textList.push_back("River");
-    textList.push_back("Mountain");
-    textList.push_back("Road");
-    textList.push_back("Lake");
-    
-    unsigned int numLat = 15;
-    unsigned int numLong = 20;
-    double latitude = 0.0;
-    double longitude = -100.0;
-    double deltaLatitude = 1.0f;
-    double deltaLongitude = 1.0f;
-
-    unsigned int t = 0;
-    for(unsigned int i = 0; i < numLat; ++i, latitude += deltaLatitude)
-    {
-        double lgnt = longitude;
-        for(unsigned int j = 0; j < numLong; ++j, ++t, lgnt += deltaLongitude)
-        {
-            geode->addDrawable( createText( ellipsoid, latitude, lgnt, 0, textList[t % textList.size()]) );
-        }
-    }
-
-    return group;
-} 
-
-
-int main(int, char**)
-{
     // construct the viewer.
     osgViewer::Viewer viewer;
 
-    viewer.getCamera()->setComputeNearFarMode(osg::CullSettings::COMPUTE_NEAR_FAR_USING_PRIMITIVES);
-    viewer.getCamera()->setNearFarRatio(0.00001f);
+    double x = 0.0;
+    double y = 0.0;
+    double w = 1.0;
+    double h = 1.0;
+
+    osg::ref_ptr<osg::Node> root = new osgTerrain::TerrainNode;
+
+    bool readParameter = false;
+    do 
+    {
+        readParameter = false;
+        std::string filename;
+        
+        if (arguments.read("-x",x)) readParameter = true;
+        if (arguments.read("-y",y)) readParameter = true;
+        if (arguments.read("-w",w)) readParameter = true;
+        if (arguments.read("-h",h)) readParameter = true;
+
+        if (arguments.read("--dem",filename))
+        {
+            readParameter = true;
+            osg::notify(osg::NOTICE)<<"--dem "<<filename<<" x="<<x<<" y="<<y<<" w="<<w<<" h="<<h<<std::endl;
+        }
+        
+        if (arguments.read("--image",filename))
+        {
+            readParameter = true;
+            osg::notify(osg::NOTICE)<<"--image "<<filename<<" x="<<x<<" y="<<y<<" w="<<w<<" h="<<h<<std::endl;
+        }
+
+    } while (readParameter);
+    
+
     
-    // read the scene from the list of file specified commandline args.
-    osg::ref_ptr<osg::Node> root = createEarth();
     
     if (!root) return 0;
 
     // add a viewport to the viewer and attach the scene graph.
     viewer.setSceneData(root.get());
 
-    osg::CoordinateSystemNode* csn = dynamic_cast<osg::CoordinateSystemNode*>(root.get());
-    if (csn)
-    {
-        // add fade text around the globe
-        csn->addChild(createFadeText(csn->getEllipsoidModel()));
-    }    
-
-    viewer.setCameraManipulator(new osgGA::TerrainManipulator);
-
     return viewer.run();
 }