bvh: Move the basic bounding volume tree functionality into core.

The basic boundignvolume implementation does only need math and
geometry. As such it is agnostic to the scenegraph being used.
Only the parts building this query structure from terrain
depend on the implementation of the terrain.
So, move this into the simgear core component.

simgear/CMakeLists.txt

@@ -3,6 +3,7 @@ file(WRITE ${PROJECT_BINARY_DIR}/simgear/version.h "#define SIMGEAR_VERSION ${SI
 
 foreach( mylibfolder 
         bucket
+        bvh
         debug
         ephemeris
         io

simgear/bvh/CMakeLists.txt

@@ -1,8 +1,7 @@
 include (SimGearComponent)
 
-set(HEADERS 
+set(HEADERS
     BVHBoundingBoxVisitor.hxx
-    BVHDebugCollectVisitor.hxx
     BVHGroup.hxx
     BVHLineGeometry.hxx
     BVHLineSegmentVisitor.hxx
@@ -19,9 +18,9 @@ set(HEADERS
     BVHSubTreeCollector.hxx
     BVHTransform.hxx
     BVHVisitor.hxx
-    )
+)
 
-set(SOURCES 
+set(SOURCES
     BVHGroup.cxx
     BVHLineGeometry.cxx
     BVHLineSegmentVisitor.cxx
@@ -33,7 +32,19 @@ set(SOURCES
     BVHStaticNode.cxx
     BVHStaticTriangle.cxx
     BVHSubTreeCollector.cxx
-    BVHTransform.cxx    
-    )
+    BVHTransform.cxx
+)
 
-simgear_scene_component(bvh scene/bvh "${SOURCES}" "${HEADERS}")
+simgear_component(bvh bvh "${SOURCES}" "${HEADERS}")
+
+if(ENABLE_TESTS)
+  if (SIMGEAR_SHARED)
+    set(TEST_LIBS SimGearCore)
+  else()
+    set(TEST_LIBS sgbvh sgmath sgstructure sgdebug)
+  endif()
+
+  add_executable(bvhtest bvhtest.cxx)
+  target_link_libraries(bvhtest ${TEST_LIBS})
+  add_test(bvhtest ${EXECUTABLE_OUTPUT_PATH}/bvhtest)
+endif(ENABLE_TESTS)

simgear/scene/CMakeLists.txt

@@ -3,7 +3,6 @@ include (SimGearComponent)
 include_directories(${PROJECT_SOURCE_DIR})
 
 foreach( mylibfolder 
-        bvh
         material
         model
         sky

simgear/scene/model/BVHDebugCollectVisitor.hxx

@@ -32,21 +32,22 @@
 #include <osg/StateSet>
 
 #include <simgear/math/SGGeometry.hxx>
+#include <simgear/scene/util/OsgMath.hxx>
 
-#include "BVHVisitor.hxx"
-#include "BVHNode.hxx"
-#include "BVHGroup.hxx"
-#include "BVHTransform.hxx"
-#include "BVHMotionTransform.hxx"
-#include "BVHStaticGeometry.hxx"
+#include <simgear/bvh/BVHVisitor.hxx>
+#include <simgear/bvh/BVHNode.hxx>
+#include <simgear/bvh/BVHGroup.hxx>
+#include <simgear/bvh/BVHTransform.hxx>
+#include <simgear/bvh/BVHMotionTransform.hxx>
+#include <simgear/bvh/BVHStaticGeometry.hxx>
 
-#include "BVHStaticData.hxx"
+#include <simgear/bvh/BVHStaticData.hxx>
 
-#include "BVHStaticNode.hxx"
-#include "BVHStaticTriangle.hxx"
-#include "BVHStaticBinary.hxx"
+#include <simgear/bvh/BVHStaticNode.hxx>
+#include <simgear/bvh/BVHStaticTriangle.hxx>
+#include <simgear/bvh/BVHStaticBinary.hxx>
 
-#include "BVHBoundingBoxVisitor.hxx"
+#include <simgear/bvh/BVHBoundingBoxVisitor.hxx>
 
 namespace simgear {
 

simgear/scene/model/BoundingVolumeBuildVisitor.hxx

@@ -33,7 +33,7 @@
 #include <simgear/scene/util/SGSceneUserData.hxx>
 #include <simgear/math/SGGeometry.hxx>
 
-#include <simgear/scene/bvh/BVHStaticGeometryBuilder.hxx>
+#include <simgear/bvh/BVHStaticGeometryBuilder.hxx>
 
 namespace simgear {
 

simgear/scene/model/CMakeLists.txt

@@ -2,6 +2,7 @@ include (SimGearComponent)
 
 set(HEADERS 
     BoundingVolumeBuildVisitor.hxx
+    BVHDebugCollectVisitor.hxx
     CheckSceneryVisitor.hxx
     ConditionNode.hxx
     ModelRegistry.hxx

simgear/scene/model/SGInteractionAnimation.cxx

@@ -26,10 +26,10 @@
 #include <osg/NodeVisitor>
 #include <osg/TemplatePrimitiveFunctor>
 
+#include <simgear/bvh/BVHGroup.hxx>
+#include <simgear/bvh/BVHLineGeometry.hxx>
 #include <simgear/scene/util/OsgMath.hxx>
 #include <simgear/scene/util/SGSceneUserData.hxx>
-#include <simgear/scene/bvh/BVHGroup.hxx>
-#include <simgear/scene/bvh/BVHLineGeometry.hxx>
 
 class SGInteractionAnimation::LineCollector : public osg::NodeVisitor {
     struct LinePrimitiveFunctor {

simgear/scene/util/SGSceneUserData.hxx

@@ -25,7 +25,7 @@
 #include <vector>
 #include <osg/Node>
 #include <osg/Object>
-#include <simgear/scene/bvh/BVHNode.hxx>
+#include <simgear/bvh/BVHNode.hxx>
 #include "SGPickCallback.hxx"
 
 class SGSceneUserData : public osg::Object {