// Loop through all the known hulls and return the description based on the physical address.
public static bool TryGetConvexHullByPtr(BulletShape pShape, out BSShapeConvexHull outHull)
{
bool ret = false;
BSShapeConvexHull foundDesc = null;
lock (ConvexHulls)
{
foreach (BSShapeConvexHull sh in ConvexHulls.Values)
{
if (sh.physShapeInfo.ReferenceSame(pShape))
{
foundDesc = sh;
ret = true;
break;
}
}
}
outHull = foundDesc;
return ret;
}
public static BSShape GetReference(BSScene physicsScene, bool forceRebuild, BSPhysObject prim)
{
float lod;
UInt64 newMeshKey = ComputeShapeKey(prim.Size, prim.BaseShape, out lod);
physicsScene.DetailLog("{0},BSShapeConvexHull,getReference,newKey={1},size={2},lod={3}",
prim.LocalID, newMeshKey.ToString("X"), prim.Size, lod);
BSShapeConvexHull retConvexHull;
bool foundMesh = false;
lock (ConvexHulls) {
foundMesh = ConvexHulls.TryGetValue (newMeshKey, out retConvexHull);
}
if (foundMesh)
{
// The mesh has already been created. Return a new reference to same.
retConvexHull.IncrementReference();
}
else
{
retConvexHull = new BSShapeConvexHull(new BulletShape());
BulletShape convexShape;
// Get a handle to a mesh to buld the hull from
BSShape baseMesh = BSShapeMesh.GetReference(physicsScene, false /* forceRebuild */, prim);
if (baseMesh.physShapeInfo.isNativeShape)
{
// We get here if the mesh was not creatable. Could be waiting for an asset from the disk.
// In the short term, we return the native shape and a later ForceBodyShapeRebuild should
// get back to this code with a buildable mesh.
// TODO: not sure the temp native shape is freed when the mesh is rebuilt. When does this get freed?
convexShape = baseMesh.physShapeInfo;
}
else
{
convexShape = physicsScene.PE.BuildConvexHullShapeFromMesh(physicsScene.World, baseMesh.physShapeInfo);
convexShape.shapeKey = newMeshKey;
lock (ConvexHulls)
ConvexHulls.Add(convexShape.shapeKey, retConvexHull);
physicsScene.DetailLog("{0},BSShapeConvexHull.GetReference,addingNewlyCreatedShape,shape={1}",
BSScene.DetailLogZero, convexShape);
}
// Done with the base mesh
baseMesh.Dereference(physicsScene);
retConvexHull.physShapeInfo = convexShape;
}
return retConvexHull;
}