GeoNode getOrigin()

timoore · Dec 25, 2023 · 3332d50 · 3332d50
1 parent 4116df5
commit 3332d50
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diff --git a/src/vsgCs/CRS.cpp b/src/vsgCs/CRS.cpp
@@ -454,6 +454,21 @@ namespace vsgCs
 
     };
 
+    // A no-op CRS. Either the coordinates are ECEF (x, y, z), or there isn't actually a globe.
+    class EPSG4978 : public CRS::ConversionOperation
+    {
+    public:
+        vsg::dvec3 getECEF(const vsg::dvec3& coord) override
+        {
+            return coord;
+        }
+
+        vsg::dmat4 getENU(const vsg::dvec3& coord) override
+        {
+            return {};
+        }
+    };
+
     // Bog-standard WGS84 longitude, latitude, height to ECEF
     class EPSG4979 : public CRS::ConversionOperation
     {
@@ -528,6 +543,10 @@ namespace vsgCs
 
     CRS::CRS(const std::string& name)
     {
+        if (name == "epsg:4978" || name == "null")
+        {
+            _converter = std::make_shared<EPSG4978>();
+        }
         if (name == "epsg:4979" || name == "wgs84")
         {
             _converter = std::make_shared<EPSG4979>();

diff --git a/src/vsgCs/GeoNode.cpp b/src/vsgCs/GeoNode.cpp
@@ -47,6 +47,12 @@ GeoNode::GeoNode(const std::string& crs)
 void GeoNode::setOrigin(const vsg::dvec3& origin)
 {
     matrix = _crs->getENU(origin);
+    _origin = origin;
+}
+
+vsg::dvec3 GeoNode::getOrigin() const
+{
+    return _origin;
 }
 
 // Try stepping back from runtime environment singleton by passing the environment as an argument.

diff --git a/src/vsgCs/GeoNode.h b/src/vsgCs/GeoNode.h
@@ -42,8 +42,10 @@ namespace vsgCs
     public:
         GeoNode(const std::string& crs = "epsg:4979");
         void setOrigin(const vsg::dvec3& origin);
+        vsg::dvec3 getOrigin() const;
     protected:
         std::shared_ptr<CRS> _crs;
+        vsg::dvec3 _origin;
     };
 
     vsg::ref_ptr<vsg::StateGroup> VSGCS_EXPORT createModelRoot(const vsg::ref_ptr<RuntimeEnvironment>& env);