Increased the deep sky object octree size (and thus the max draw distance) to 100 Gly.

src/celengine/dsodb.cpp

@@ -36,8 +36,10 @@
 using namespace std;
 
 
-static const float DSO_OCTREE_ROOT_SIZE   = 1.8e9f;
-static const float DSO_OCTREE_MAGNITUDE   = 12.0f;
+// 100 Gly - on the order of the current size of the universe
+const float DSO_OCTREE_ROOT_SIZE   = 1.0e11f;
+
+static const float DSO_OCTREE_MAGNITUDE   = 8.0f;
 static const float DSO_EXTRA_ROOM         = 0.01f; // Reserve 1% capacity for extra DSOs
                                                    // (useful as a complement of binary loaded DSOs)
 
@@ -381,7 +383,11 @@ void DSODatabase::buildOctree()
 {
     DPRINTF(1, "Sorting DSOs into octree . . .\n");
     float absMag             = astro::appToAbsMag(DSO_OCTREE_MAGNITUDE, DSO_OCTREE_ROOT_SIZE * (float) sqrt(3.0));
-    DynamicDSOOctree* root   = new DynamicDSOOctree(Point3d(1000, 1000, 1000), absMag);        //TODO: center??
+
+    // TODO: investigate using a different center--it's possible that more
+    // objects end up straddling the base level nodes when the center of the
+    // octree is at the origin.
+    DynamicDSOOctree* root   = new DynamicDSOOctree(Point3d(0, 0, 0), absMag);
     for (int i = 0; i < nDSOs; ++i)
     {
         root->insertObject(DSOs[i], DSO_OCTREE_ROOT_SIZE);

src/celengine/dsodb.h

@@ -23,6 +23,8 @@
 
 static const unsigned int MAX_DSO_NAMES = 10;
 
+extern const float DSO_OCTREE_ROOT_SIZE;
+
 //NOTE: this one and starDatabase should be derived from a common base class since they share lots of code and functionality.
 class DSODatabase
 {

src/celengine/render.cpp

@@ -53,7 +53,6 @@ using namespace std;
 #endif
 
 static const float  STAR_DISTANCE_LIMIT  = 1.0e6f;
-static const double DSO_DISTANCE_LIMIT   = 1.8e9;
 static const int REF_DISTANCE_TO_SCREEN  = 400; //[mm]
 
 // Distance from the Sun at which comet tails will start to fade out
@@ -7103,7 +7102,7 @@ class DSORenderer : public ObjectRenderer<DeepSkyObject*, double>
 
 
 DSORenderer::DSORenderer() :
-    ObjectRenderer<DeepSkyObject*, double>(DSO_DISTANCE_LIMIT),
+    ObjectRenderer<DeepSkyObject*, double>(DSO_OCTREE_ROOT_SIZE),
     frustum(degToRad(45.0f), 1.0f, 1.0f)
 {
 }