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Fix hang on "Loading Scenery" over the sea

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Previously attempting to start on an ocean tile with static
models present cause FG to spin on "Loading Scenery".

This was caused by not creating a BVH for an ocean tile in
the specific case where there was STG models, due to a PagedLOD
node being inserted in the scene graph.  So
FG never thought the scenery was loaded sufficient to place
the aircraft.

By explicitly creating a BVH for ocean tiles the problem is
fixed.

Candidate for 2020.X
This commit is contained in:
Stuart Buchanan 2020-12-30 16:38:04 +00:00 committed by James Turner
parent 1d9fa929fa
commit 2ad4d2e672
1 changed files with 6 additions and 0 deletions
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6
simgear/scene/tgdb/SGOceanTile.cxx
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@ -41,6 +41,7 @@
#include <simgear/scene/material/EffectGeode.hxx>
#include <simgear/scene/material/mat.hxx>
#include <simgear/scene/material/matlib.hxx>
#include <simgear/scene/model/BoundingVolumeBuildVisitor.hxx>
#include <simgear/scene/util/OsgMath.hxx>
#include <simgear/scene/util/VectorArrayAdapter.hxx>
#include <simgear/scene/util/SGNodeMasks.hxx>
@ -340,5 +341,10 @@ osg::Node* SGOceanTile(const SGBucket& b, SGMaterialLib *matlib, int latPoints,
transform->addChild(geode);
transform->setNodeMask( ~(simgear::CASTSHADOW_BIT | simgear::MODELLIGHT_BIT) );
// Create a BVH at this point. This is normally provided by the file loader, but as we create the
// geometry programmatically, no file loader is involved.
BoundingVolumeBuildVisitor bvhBuilder(false);
transform->accept(bvhBuilder);
return transform;
}