C# BSScene.DetailLog方法代码示例

    // Get a reference to a physical shape. Create if it doesn't exist
    public static BSShape GetShapeReference(BSScene physicsScene, bool forceRebuild, BSPhysObject prim)
    {
        BSShape ret = null;

        if (prim.PreferredPhysicalShape == BSPhysicsShapeType.SHAPE_CAPSULE)
        {
            // an avatar capsule is close to a native shape (it is not shared)
            ret = BSShapeNative.GetReference(physicsScene, prim, BSPhysicsShapeType.SHAPE_CAPSULE,
                                        FixedShapeKey.KEY_CAPSULE);
            physicsScene.DetailLog("{0},BSShape.GetShapeReference,avatarCapsule,shape={1}", prim.LocalID, ret);
        }

        // Compound shapes are handled special as they are rebuilt from scratch.
        // This isn't too great a hardship since most of the child shapes will have already been created.
        if (ret == null  && prim.PreferredPhysicalShape == BSPhysicsShapeType.SHAPE_COMPOUND)
        {
            // Getting a reference to a compound shape gets you the compound shape with the root prim shape added
            ret = BSShapeCompound.GetReference(prim);
            physicsScene.DetailLog("{0},BSShapeCollection.CreateGeom,compoundShape,shape={1}", prim.LocalID, ret);
        }

        // Avatars have their own unique shape
        if (ret == null  && prim.PreferredPhysicalShape == BSPhysicsShapeType.SHAPE_AVATAR)
        {
            // Getting a reference to a compound shape gets you the compound shape with the root prim shape added
            ret = BSShapeAvatar.GetReference(prim);
            physicsScene.DetailLog("{0},BSShapeCollection.CreateGeom,avatarShape,shape={1}", prim.LocalID, ret);
        }

        if (ret == null)
            ret = GetShapeReferenceNonSpecial(physicsScene, forceRebuild, prim);

        return ret;
    }

    // Convert the passed heightmap to mesh information suitable for CreateMeshShape2().
    // Version that handles magnification.
    // Return 'true' if successfully created.
    public static bool ConvertHeightmapToMesh2( BSScene physicsScene,
                                float[] heightMap, int sizeX, int sizeY,    // parameters of incoming heightmap
                                int magnification,                          // number of vertices per heighmap step
                                Vector3 extent,                             // dimensions of the output mesh
                                Vector3 extentBase,                         // base to be added to all vertices
                                out int indicesCountO, out int[] indicesO,
                                out int verticesCountO, out float[] verticesO)
    {
        bool ret = false;

        int indicesCount = 0;
        int verticesCount = 0;
        int[] indices = new int[0];
        float[] vertices = new float[0];

        HeightMapGetter hmap = new HeightMapGetter(heightMap, sizeX, sizeY);

        // The vertices dimension of the output mesh
        int meshX = sizeX * magnification;
        int meshY = sizeY * magnification;
        // The output size of one mesh step
        float meshXStep = extent.X / meshX;
        float meshYStep = extent.Y / meshY;

        // Create an array of vertices that is meshX+1 by meshY+1 (note the loop
        //    from zero to <= meshX). The triangle indices are then generated as two triangles
        //    per heightmap point. There are meshX by meshY of these squares. The extra row and
        //    column of vertices are used to complete the triangles of the last row and column
        //    of the heightmap.
        try
        {
            // Vertices for the output heightmap plus one on the side and bottom to complete triangles
            int totalVertices = (meshX + 1) * (meshY + 1);
            vertices = new float[totalVertices * 3];
            int totalIndices = meshX * meshY * 6;
            indices = new int[totalIndices];

            if (physicsScene != null)
                physicsScene.DetailLog("{0},BSTerrainMesh.ConvertHeightMapToMesh2,inSize={1},outSize={2},totVert={3},totInd={4},extentBase={5}",
                                    BSScene.DetailLogZero, new Vector2(sizeX, sizeY), new Vector2(meshX, meshY),
                                    totalVertices, totalIndices, extentBase);

            float minHeight = float.MaxValue;
            // Note that sizeX+1 vertices are created since there is land between this and the next region.
            // Loop through the output vertices and compute the mediun height in between the input vertices
            for (int yy = 0; yy <= meshY; yy++)
            {
                for (int xx = 0; xx <= meshX; xx++)     // Hint: the "<=" means we go around sizeX + 1 times
                {
                    float offsetY = (float)yy * (float)sizeY / (float)meshY;     // The Y that is closest to the mesh point
                    int stepY = (int)offsetY;
                    float fractionalY = offsetY - (float)stepY;
                    float offsetX = (float)xx * (float)sizeX / (float)meshX;     // The X that is closest to the mesh point
                    int stepX = (int)offsetX;
                    float fractionalX = offsetX - (float)stepX;

                    // physicsScene.DetailLog("{0},BSTerrainMesh.ConvertHeightMapToMesh2,xx={1},yy={2},offX={3},stepX={4},fractX={5},offY={6},stepY={7},fractY={8}",
                    //                 BSScene.DetailLogZero, xx, yy, offsetX, stepX, fractionalX, offsetY, stepY, fractionalY);

                    // get the four corners of the heightmap square the mesh point is in
                    float heightUL = hmap.GetHeight(stepX    , stepY    );
                    float heightUR = hmap.GetHeight(stepX + 1, stepY    );
                    float heightLL = hmap.GetHeight(stepX    , stepY + 1);
                    float heightLR = hmap.GetHeight(stepX + 1, stepY + 1);

                    // bilinear interplolation
                    float height = heightUL * (1 - fractionalX) * (1 - fractionalY)
                                 + heightUR * fractionalX       * (1 - fractionalY)
                                 + heightLL * (1 - fractionalX) * fractionalY
                                 + heightLR * fractionalX       * fractionalY;

                    // physicsScene.DetailLog("{0},BSTerrainMesh.ConvertHeightMapToMesh2,heightUL={1},heightUR={2},heightLL={3},heightLR={4},heightMap={5}",
                    //                 BSScene.DetailLogZero, heightUL, heightUR, heightLL, heightLR, height);

                    minHeight = Math.Min(minHeight, height);

                    vertices[verticesCount + 0] = (float)xx * meshXStep + extentBase.X;
                    vertices[verticesCount + 1] = (float)yy * meshYStep + extentBase.Y;
                    vertices[verticesCount + 2] = height + extentBase.Z;
                    verticesCount += 3;
                }
            }
            // The number of vertices generated
            verticesCount /= 3;

            // Loop through all the heightmap squares and create indices for the two triangles for that square
            for (int yy = 0; yy < meshY; yy++)
            {
                for (int xx = 0; xx < meshX; xx++)
                {
                    int offset = yy * (meshX + 1) + xx;
                    // Each vertices is presumed to be the upper left corner of a box of two triangles
                    indices[indicesCount + 0] = offset;
                    indices[indicesCount + 1] = offset + 1;
                    indices[indicesCount + 2] = offset + meshX + 1; // accounting for the extra column
                    indices[indicesCount + 3] = offset + 1;
                    indices[indicesCount + 4] = offset + meshX + 2;
//.........这里部分代码省略.........

    // Convert the passed heightmap to mesh information suitable for CreateMeshShape2().
    // Return 'true' if successfully created.
    public static bool ConvertHeightmapToMesh( BSScene physicsScene,
                                float[] heightMap, int sizeX, int sizeY,    // parameters of incoming heightmap
                                Vector3 extentBase,                         // base to be added to all vertices
                                out int indicesCountO, out int[] indicesO,
                                out int verticesCountO, out float[] verticesO)
    {
        bool ret = false;

        int indicesCount = 0;
        int verticesCount = 0;
        int[] indices = new int[0];
        float[] vertices = new float[0];

        // Simple mesh creation which assumes magnification == 1.
        // TODO: do a more general solution that scales, adds new vertices and smoothes the result.

        // Create an array of vertices that is sizeX+1 by sizeY+1 (note the loop
        //    from zero to <= sizeX). The triangle indices are then generated as two triangles
        //    per heightmap point. There are sizeX by sizeY of these squares. The extra row and
        //    column of vertices are used to complete the triangles of the last row and column
        //    of the heightmap.
        try
        {
            // One vertice per heightmap value plus the vertices off the side and bottom edge.
            int totalVertices = (sizeX + 1) * (sizeY + 1);
            vertices = new float[totalVertices * 3];
            int totalIndices = sizeX * sizeY * 6;
            indices = new int[totalIndices];

            if (physicsScene != null)
                physicsScene.DetailLog("{0},BSTerrainMesh.ConvertHeightMapToMesh,totVert={1},totInd={2},extentBase={3}",
                                    BSScene.DetailLogZero, totalVertices, totalIndices, extentBase);
            float minHeight = float.MaxValue;
            // Note that sizeX+1 vertices are created since there is land between this and the next region.
            for (int yy = 0; yy <= sizeY; yy++)
            {
                for (int xx = 0; xx <= sizeX; xx++)     // Hint: the "<=" means we go around sizeX + 1 times
                {
                    int offset = yy * sizeX + xx;
                    // Extend the height with the height from the last row or column
                    if (yy == sizeY) offset -= sizeX;
                    if (xx == sizeX) offset -= 1;
                    float height = heightMap[offset];
                    minHeight = Math.Min(minHeight, height);
                    vertices[verticesCount + 0] = (float)xx + extentBase.X;
                    vertices[verticesCount + 1] = (float)yy + extentBase.Y;
                    vertices[verticesCount + 2] = height + extentBase.Z;
                    verticesCount += 3;
                }
            }
            verticesCount = verticesCount / 3;

            for (int yy = 0; yy < sizeY; yy++)
            {
                for (int xx = 0; xx < sizeX; xx++)
                {
                    int offset = yy * (sizeX + 1) + xx;
                    // Each vertices is presumed to be the upper left corner of a box of two triangles
                    indices[indicesCount + 0] = offset;
                    indices[indicesCount + 1] = offset + 1;
                    indices[indicesCount + 2] = offset + sizeX + 1; // accounting for the extra column
                    indices[indicesCount + 3] = offset + 1;
                    indices[indicesCount + 4] = offset + sizeX + 2;
                    indices[indicesCount + 5] = offset + sizeX + 1;
                    indicesCount += 6;
                }
            }

            ret = true;
        }
        catch (Exception e)
        {
            if (physicsScene != null)
                physicsScene.Logger.ErrorFormat("{0} Failed conversion of heightmap to mesh. For={1}/{2}, e={3}",
                                                LogHeader, physicsScene.RegionName, extentBase, e);
        }

        indicesCountO = indicesCount;
        indicesO = indices;
        verticesCountO = verticesCount;
        verticesO = vertices;

        return ret;
    }

 // Sometimes we have a pointer to a collision shape but don't know what type it is.
 // Figure out type and call the correct dereference routine.
 // Called at taint-time.
 private void DereferenceAnonCollisionShape(BSScene physicsScene, BulletShape pShape)
 {
     // TODO: figure a better way to go through all the shape types and find a possible instance.
     physicsScene.DetailLog("{0},BSShapeCompound.DereferenceAnonCollisionShape,shape={1}",
                                         BSScene.DetailLogZero, pShape);
     BSShapeMesh meshDesc;
     if (BSShapeMesh.TryGetMeshByPtr(pShape, out meshDesc))
     {
         meshDesc.Dereference(physicsScene);
         // physicsScene.DetailLog("{0},BSShapeCompound.DereferenceAnonCollisionShape,foundMesh,shape={1}", BSScene.DetailLogZero, pShape);
     }
     else
     {
         BSShapeHull hullDesc;
         if (BSShapeHull.TryGetHullByPtr(pShape, out hullDesc))
         {
             hullDesc.Dereference(physicsScene);
             // physicsScene.DetailLog("{0},BSShapeCompound.DereferenceAnonCollisionShape,foundHull,shape={1}", BSScene.DetailLogZero, pShape);
         }
         else
         {
             BSShapeConvexHull chullDesc;
             if (BSShapeConvexHull.TryGetConvexHullByPtr(pShape, out chullDesc))
             {
                 chullDesc.Dereference(physicsScene);
                 // physicsScene.DetailLog("{0},BSShapeCompound.DereferenceAnonCollisionShape,foundConvexHull,shape={1}", BSScene.DetailLogZero, pShape);
             }
             else
             {
                 BSShapeGImpact gImpactDesc;
                 if (BSShapeGImpact.TryGetGImpactByPtr(pShape, out gImpactDesc))
                 {
                     gImpactDesc.Dereference(physicsScene);
                     // physicsScene.DetailLog("{0},BSShapeCompound.DereferenceAnonCollisionShape,foundgImpact,shape={1}", BSScene.DetailLogZero, pShape);
                 }
                 else
                 {
                     // Didn't find it in the lists of specific types. It could be compound.
                     BSShapeCompound compoundDesc;
                     if (BSShapeCompound.TryGetCompoundByPtr(pShape, out compoundDesc))
                     {
                         compoundDesc.Dereference(physicsScene);
                         // physicsScene.DetailLog("{0},BSShapeCompound.DereferenceAnonCollisionShape,recursiveCompoundShape,shape={1}", BSScene.DetailLogZero, pShape);
                     }
                     else
                     {
                         // If none of the above, maybe it is a simple native shape.
                         if (physicsScene.PE.IsNativeShape(pShape))
                         {
                             // physicsScene.DetailLog("{0},BSShapeCompound.DereferenceAnonCollisionShape,assumingNative,shape={1}", BSScene.DetailLogZero, pShape);
                             BSShapeNative nativeShape = new BSShapeNative(pShape);
                             nativeShape.Dereference(physicsScene);
                         }
                     }
                 }
             }
         }
     }
 }

    // Dereferencing a compound shape releases the hold on all the child shapes.
    public override void Dereference(BSScene physicsScene)
    {
        lock (physShapeInfo)
        {
            this.DecrementReference();
            physicsScene.DetailLog("{0},BSShapeCompound.Dereference,shape={1}", BSScene.DetailLogZero, this);
            if (referenceCount <= 0)
            {
                if (!physicsScene.PE.IsCompound(physShapeInfo))
                {
                    // Failed the sanity check!!
                    physicsScene.Logger.ErrorFormat("{0} Attempt to free a compound shape that is not compound!! type={1}, ptr={2}",
                                                LogHeader, physShapeInfo.shapeType, physShapeInfo.AddrString);
                    physicsScene.DetailLog("{0},BSShapeCollection.DereferenceCompound,notACompoundShape,type={1},ptr={2}",
                                                BSScene.DetailLogZero, physShapeInfo.shapeType, physShapeInfo.AddrString);
                    return;
                }

                int numChildren = physicsScene.PE.GetNumberOfCompoundChildren(physShapeInfo);
                physicsScene.DetailLog("{0},BSShapeCollection.DereferenceCompound,shape={1},children={2}",
                                        BSScene.DetailLogZero, physShapeInfo, numChildren);

                // Loop through all the children dereferencing each.
                for (int ii = numChildren - 1; ii >= 0; ii--)
                {
                    BulletShape childShape = physicsScene.PE.RemoveChildShapeFromCompoundShapeIndex(physShapeInfo, ii);
                    DereferenceAnonCollisionShape(physicsScene, childShape);
                }

                lock (CompoundShapes)
                    CompoundShapes.Remove(physShapeInfo.AddrString);
                physicsScene.PE.DeleteCollisionShape(physicsScene.World, physShapeInfo);
            }
        }
    }

    private BulletShape CreatePhysicalHull(BSScene physicsScene, BSPhysObject prim, System.UInt64 newHullKey,
                                            PrimitiveBaseShape pbs, OMV.Vector3 size, float lod)
    {
        BulletShape newShape = new BulletShape();

        IMesh meshData = null;
        List<List<OMV.Vector3>> allHulls = null;
        lock (physicsScene.mesher)
        {
            // Pass true for physicalness as this prevents the creation of bounding box which is not needed
            meshData = physicsScene.mesher.CreateMesh(prim.PhysObjectName, pbs, size, lod, true /* isPhysical */, false /* shouldCache */);

            // If we should use the asset's hull info, fetch it out of the locked mesher
            if (meshData != null && BSParam.ShouldUseAssetHulls)
            {
                Meshmerizer realMesher = physicsScene.mesher as Meshmerizer;
                if (realMesher != null)
                {
                    allHulls = realMesher.GetConvexHulls(size);
                }
                if (allHulls == null)
                {
                    physicsScene.DetailLog("{0},BSShapeHull.CreatePhysicalHull,assetHulls,noAssetHull", prim.LocalID);
                }
            }
        }

        // If there is hull data in the mesh asset, build the hull from that
        if (allHulls != null && BSParam.ShouldUseAssetHulls)
        {
            int hullCount = allHulls.Count;
            int totalVertices = 1;      // include one for the count of the hulls
            // Using the structure described for HACD hulls, create the memory sturcture
            //     to pass the hull data to the creater.
            foreach (List<OMV.Vector3> hullVerts in allHulls)
            {
                totalVertices += 4;                     // add four for the vertex count and centroid
                totalVertices += hullVerts.Count * 3;   // one vertex is three dimensions
            }
            float[] convHulls = new float[totalVertices];

            convHulls[0] = (float)hullCount;
            int jj = 1;
            foreach (List<OMV.Vector3> hullVerts in allHulls)
            {
                convHulls[jj + 0] = hullVerts.Count;
                convHulls[jj + 1] = 0f;   // centroid x,y,z
                convHulls[jj + 2] = 0f;
                convHulls[jj + 3] = 0f;
                jj += 4;
                foreach (OMV.Vector3 oneVert in hullVerts)
                {
                    convHulls[jj + 0] = oneVert.X;
                    convHulls[jj + 1] = oneVert.Y;
                    convHulls[jj + 2] = oneVert.Z;
                    jj += 3;
                }
            }

            // create the hull data structure in Bullet
            newShape = physicsScene.PE.CreateHullShape(physicsScene.World, hullCount, convHulls);

            physicsScene.DetailLog("{0},BSShapeHull.CreatePhysicalHull,assetHulls,hulls={1},totVert={2},shape={3}",
                                        prim.LocalID, hullCount, totalVertices, newShape);
        }

        // If no hull specified in the asset and we should use Bullet's HACD approximation...
        if (!newShape.HasPhysicalShape && BSParam.ShouldUseBulletHACD)
        {
            // Build the hull shape from an existing mesh shape.
            // The mesh should have already been created in Bullet.
            physicsScene.DetailLog("{0},BSShapeHull.CreatePhysicalHull,bulletHACD,entry", prim.LocalID);
            BSShape meshShape = BSShapeMesh.GetReference(physicsScene, true, prim);

            if (meshShape.physShapeInfo.HasPhysicalShape)
            {
                HACDParams parms;
                parms.maxVerticesPerHull = BSParam.BHullMaxVerticesPerHull;
                parms.minClusters = BSParam.BHullMinClusters;
                parms.compacityWeight = BSParam.BHullCompacityWeight;
                parms.volumeWeight = BSParam.BHullVolumeWeight;
                parms.concavity = BSParam.BHullConcavity;
                parms.addExtraDistPoints = BSParam.NumericBool(BSParam.BHullAddExtraDistPoints);
                parms.addNeighboursDistPoints = BSParam.NumericBool(BSParam.BHullAddNeighboursDistPoints);
                parms.addFacesPoints = BSParam.NumericBool(BSParam.BHullAddFacesPoints);
                parms.shouldAdjustCollisionMargin = BSParam.NumericBool(BSParam.BHullShouldAdjustCollisionMargin);

                physicsScene.DetailLog("{0},BSShapeHull.CreatePhysicalHull,hullFromMesh,beforeCall", prim.LocalID, newShape.HasPhysicalShape);
                newShape = physicsScene.PE.BuildHullShapeFromMesh(physicsScene.World, meshShape.physShapeInfo, parms);
                physicsScene.DetailLog("{0},BSShapeHull.CreatePhysicalHull,hullFromMesh,shape={1}", prim.LocalID, newShape);

                // Now done with the mesh shape.
                meshShape.Dereference(physicsScene);
            }
            physicsScene.DetailLog("{0},BSShapeHull.CreatePhysicalHull,bulletHACD,exit,hasBody={1}", prim.LocalID, newShape.HasPhysicalShape);
        }

        // If no other hull specifications, use our HACD hull approximation.
        if (!newShape.HasPhysicalShape && meshData != null)
        {
//.........这里部分代码省略.........

    public static BSShape GetReference(BSScene physicsScene, bool forceRebuild, BSPhysObject prim)
    {
        float lod;
        System.UInt64 newHullKey = BSShape.ComputeShapeKey(prim.Size, prim.BaseShape, out lod);

        BSShapeHull retHull = null;
        lock (Hulls)
        {
            if (Hulls.TryGetValue(newHullKey, out retHull))
            {
                // The mesh has already been created. Return a new reference to same.
                retHull.IncrementReference();
            }
            else
            {
                retHull = new BSShapeHull(new BulletShape());
                // An instance of this mesh has not been created. Build and remember same.
                BulletShape newShape = retHull.CreatePhysicalHull(physicsScene, prim, newHullKey, prim.BaseShape, prim.Size, lod);

                // Check to see if hull was created (might require an asset).
                newShape = VerifyMeshCreated(physicsScene, newShape, prim);
                if (!newShape.isNativeShape
                            || prim.PrimAssetState == BSPhysObject.PrimAssetCondition.FailedMeshing
                            || prim.PrimAssetState == BSPhysObject.PrimAssetCondition.FailedAssetFetch)
                {
                    // If a mesh was what was created, remember the built shape for later sharing.
                    Hulls.Add(newHullKey, retHull);
                }
                retHull.physShapeInfo = newShape;
            }
        }
        physicsScene.DetailLog("{0},BSShapeHull,getReference,hull={1},size={2},lod={3}", prim.LocalID, retHull, prim.Size, lod);
        return retHull;
    }

    // Code that uses the mesher to create the index/vertices info for a trimesh shape.
    // This is used by the passed 'makeShape' call to create the Bullet mesh shape.
    // The actual build call is passed so this logic can be used by several of the shapes that use a
    //     simple mesh as their base shape.
    public static BulletShape CreatePhysicalMeshShape(BSScene physicsScene, BSPhysObject prim, System.UInt64 newMeshKey,
                                            PrimitiveBaseShape pbs, OMV.Vector3 size, float lod, CreateShapeCall makeShape)
    {
        BulletShape newShape = new BulletShape();

        IMesh meshData = null;
        lock (physicsScene.mesher)
        {
            meshData = physicsScene.mesher.CreateMesh(prim.PhysObjectName, pbs, size, lod,
                                            false,  // say it is not physical so a bounding box is not built
                                            false   // do not cache the mesh and do not use previously built versions
                                            );
        }

        if (meshData != null)
        {
            if (prim.PrimAssetState == BSPhysObject.PrimAssetCondition.Fetched)
            {
                // Release the fetched asset data once it has been used.
                pbs.SculptData = new byte[0];
                prim.PrimAssetState = BSPhysObject.PrimAssetCondition.Unknown;
            }

            int[] indices = meshData.getIndexListAsInt();
            int realIndicesIndex = indices.Length;
            float[] verticesAsFloats = meshData.getVertexListAsFloat();

            if (BSParam.ShouldRemoveZeroWidthTriangles)
            {
                // Remove degenerate triangles. These are triangles with two of the vertices
                //    are the same. This is complicated by the problem that vertices are not
                //    made unique in sculpties so we have to compare the values in the vertex.
                realIndicesIndex = 0;
                for (int tri = 0; tri < indices.Length; tri += 3)
                {
                    // Compute displacements into vertex array for each vertex of the triangle
                    int v1 = indices[tri + 0] * 3;
                    int v2 = indices[tri + 1] * 3;
                    int v3 = indices[tri + 2] * 3;
                // Check to see if any two of the vertices are the same
                    if (!( (  verticesAsFloats[v1 + 0] == verticesAsFloats[v2 + 0]
                           && verticesAsFloats[v1 + 1] == verticesAsFloats[v2 + 1]
                           && verticesAsFloats[v1 + 2] == verticesAsFloats[v2 + 2])
                        || (  verticesAsFloats[v2 + 0] == verticesAsFloats[v3 + 0]
                           && verticesAsFloats[v2 + 1] == verticesAsFloats[v3 + 1]
                           && verticesAsFloats[v2 + 2] == verticesAsFloats[v3 + 2])
                        || (  verticesAsFloats[v1 + 0] == verticesAsFloats[v3 + 0]
                           && verticesAsFloats[v1 + 1] == verticesAsFloats[v3 + 1]
                           && verticesAsFloats[v1 + 2] == verticesAsFloats[v3 + 2]) )
                    )
                    {
                        // None of the vertices of the triangles are the same. This is a good triangle;
                        indices[realIndicesIndex + 0] = indices[tri + 0];
                        indices[realIndicesIndex + 1] = indices[tri + 1];
                        indices[realIndicesIndex + 2] = indices[tri + 2];
                        realIndicesIndex += 3;
                    }
                }
            }
            physicsScene.DetailLog("{0},BSShapeMesh.CreatePhysicalMesh,key={1},origTri={2},realTri={3},numVerts={4}",
                        BSScene.DetailLogZero, newMeshKey.ToString("X"), indices.Length / 3, realIndicesIndex / 3, verticesAsFloats.Length / 3);

            if (realIndicesIndex != 0)
            {
                newShape = makeShape(physicsScene.World, realIndicesIndex, indices, verticesAsFloats.Length / 3, verticesAsFloats);
            }
            else
            {
                // Force the asset condition to 'failed' so we won't try to keep fetching and processing this mesh.
                prim.PrimAssetState = BSPhysObject.PrimAssetCondition.FailedMeshing;
                physicsScene.Logger.DebugFormat("{0} All mesh triangles degenerate. Prim={1}", LogHeader, UsefulPrimInfo(physicsScene, prim) );
                physicsScene.DetailLog("{0},BSShapeMesh.CreatePhysicalMesh,allDegenerate,key={1}", prim.LocalID, newMeshKey);
            }
        }
        newShape.shapeKey = newMeshKey;

        return newShape;
    }

    private static BulletShape CreatePhysicalNativeShape(BSScene physicsScene, BSPhysObject prim,
                                            BSPhysicsShapeType shapeType, FixedShapeKey shapeKey)
    {
        BulletShape newShape;

        ShapeData nativeShapeData = new ShapeData();
        nativeShapeData.Type = shapeType;
        nativeShapeData.ID = prim.LocalID;
        nativeShapeData.Scale = prim.Scale;
        nativeShapeData.Size = prim.Scale;
        nativeShapeData.MeshKey = (ulong)shapeKey;
        nativeShapeData.HullKey = (ulong)shapeKey;

        if (shapeType == BSPhysicsShapeType.SHAPE_CAPSULE)
        {
            newShape = physicsScene.PE.BuildCapsuleShape(physicsScene.World, 1f, 1f, prim.Scale);
            physicsScene.DetailLog("{0},BSShapeNative,capsule,scale={1}", prim.LocalID, prim.Scale);
        }
        else
        {
            newShape = physicsScene.PE.BuildNativeShape(physicsScene.World, nativeShapeData);
        }
        if (!newShape.HasPhysicalShape)
        {
            physicsScene.Logger.ErrorFormat("{0} BuildPhysicalNativeShape failed. ID={1}, shape={2}",
                                    LogHeader, prim.LocalID, shapeType);
        }
        newShape.shapeType = shapeType;
        newShape.isNativeShape = true;
        newShape.shapeKey = (UInt64)shapeKey;
        return newShape;
    }

    // The creation of a mesh or hull can fail if an underlying asset is not available.
    // There are two cases: 1) the asset is not in the cache and it needs to be fetched;
    //     and 2) the asset cannot be converted (like failed decompression of JPEG2000s).
    //     The first case causes the asset to be fetched. The second case requires
    //     us to not loop forever.
    // Called after creating a physical mesh or hull. If the physical shape was created,
    //     just return.
    public static BulletShape VerifyMeshCreated(BSScene physicsScene, BulletShape newShape, BSPhysObject prim)
    {
        // If the shape was successfully created, nothing more to do
        if (newShape.HasPhysicalShape)
            return newShape;

        // VerifyMeshCreated is called after trying to create the mesh. If we think the asset had been
        //    fetched but we end up here again, the meshing of the asset must have failed.
        // Prevent trying to keep fetching the mesh by declaring failure.
        if (prim.PrimAssetState == BSPhysObject.PrimAssetCondition.Fetched)
        {
            prim.PrimAssetState = BSPhysObject.PrimAssetCondition.FailedMeshing;
            physicsScene.Logger.WarnFormat("{0} Fetched asset would not mesh. prim={1}, texture={2}",
                                            LogHeader, UsefulPrimInfo(physicsScene, prim), prim.BaseShape.SculptTexture);
            physicsScene.DetailLog("{0},BSShape.VerifyMeshCreated,setFailed,prim={1},tex={2}",
                                            prim.LocalID, UsefulPrimInfo(physicsScene, prim), prim.BaseShape.SculptTexture);
        }
        else
        {
            // If this mesh has an underlying asset and we have not failed getting it before, fetch the asset
            if (prim.BaseShape.SculptEntry
                && prim.PrimAssetState != BSPhysObject.PrimAssetCondition.FailedAssetFetch
                && prim.PrimAssetState != BSPhysObject.PrimAssetCondition.FailedMeshing
                && prim.PrimAssetState != BSPhysObject.PrimAssetCondition.Waiting
                && prim.BaseShape.SculptTexture != OMV.UUID.Zero
                )
            {
                physicsScene.DetailLog("{0},BSShape.VerifyMeshCreated,fetchAsset,objNam={1},tex={2}",
                                            prim.LocalID, prim.PhysObjectName, prim.BaseShape.SculptTexture);
                // Multiple requestors will know we're waiting for this asset
                prim.PrimAssetState = BSPhysObject.PrimAssetCondition.Waiting;

                BSPhysObject xprim = prim;
                Util.FireAndForget(delegate
                    {
                        // physicsScene.DetailLog("{0},BSShape.VerifyMeshCreated,inFireAndForget", xprim.LocalID);
                        RequestAssetDelegate assetProvider = physicsScene.RequestAssetMethod;
                        if (assetProvider != null)
                        {
                            BSPhysObject yprim = xprim; // probably not necessary, but, just in case.
                            assetProvider(yprim.BaseShape.SculptTexture, delegate(AssetBase asset)
                            {
                                // physicsScene.DetailLog("{0},BSShape.VerifyMeshCreated,assetProviderCallback", xprim.LocalID);
                                bool assetFound = false;
                                string mismatchIDs = String.Empty;  // DEBUG DEBUG
                                if (asset != null && yprim.BaseShape.SculptEntry)
                                {
                                    if (yprim.BaseShape.SculptTexture.ToString() == asset.ID)
                                    {
                                        yprim.BaseShape.SculptData = asset.Data;
                                        // This will cause the prim to see that the filler shape is not the right
                                        //    one and try again to build the object.
                                        // No race condition with the normal shape setting since the rebuild is at taint time.
                                        yprim.PrimAssetState = BSPhysObject.PrimAssetCondition.Fetched;
                                        yprim.ForceBodyShapeRebuild(false /* inTaintTime */);
                                        assetFound = true;
                                    }
                                    else
                                    {
                                        mismatchIDs = yprim.BaseShape.SculptTexture.ToString() + "/" + asset.ID;
                                    }
                                }
                                if (!assetFound)
                                {
                                    yprim.PrimAssetState = BSPhysObject.PrimAssetCondition.FailedAssetFetch;
                                }
                                physicsScene.DetailLog("{0},BSShape.VerifyMeshCreated,fetchAssetCallback,found={1},isSculpt={2},ids={3}",
                                            yprim.LocalID, assetFound, yprim.BaseShape.SculptEntry, mismatchIDs );
                            });
                        }
                        else
                        {
                            xprim.PrimAssetState = BSPhysObject.PrimAssetCondition.FailedAssetFetch;
                            physicsScene.Logger.ErrorFormat("{0} Physical object requires asset but no asset provider. Name={1}",
                                                        LogHeader, physicsScene.Name);
                        }
                    });
            }
            else
            {
                if (prim.PrimAssetState == BSPhysObject.PrimAssetCondition.FailedAssetFetch)
                {
                    physicsScene.Logger.WarnFormat("{0} Mesh failed to fetch asset. prim={1}, texture={2}",
                                                LogHeader, UsefulPrimInfo(physicsScene, prim), prim.BaseShape.SculptTexture);
                    physicsScene.DetailLog("{0},BSShape.VerifyMeshCreated,wasFailed,prim={1},tex={2}",
                                                prim.LocalID, UsefulPrimInfo(physicsScene, prim), prim.BaseShape.SculptTexture);
                }
                if (prim.PrimAssetState == BSPhysObject.PrimAssetCondition.FailedMeshing)
                {
                    physicsScene.Logger.WarnFormat("{0} Mesh asset would not mesh. prim={1}, texture={2}",
                                                LogHeader, UsefulPrimInfo(physicsScene, prim), prim.BaseShape.SculptTexture);
                    physicsScene.DetailLog("{0},BSShape.VerifyMeshCreated,wasFailedMeshing,prim={1},tex={2}",
                                                prim.LocalID, UsefulPrimInfo(physicsScene, prim), prim.BaseShape.SculptTexture);
//.........这里部分代码省略.........

    public static BSShape GetReference(BSScene physicsScene, bool forceRebuild, BSPhysObject prim)
    {
        float lod;
        System.UInt64 newMeshKey = BSShape.ComputeShapeKey(prim.Size, prim.BaseShape, out lod);

        physicsScene.DetailLog("{0},BSShapeGImpact,getReference,newKey={1},size={2},lod={3}",
                                prim.LocalID, newMeshKey.ToString("X"), prim.Size, lod);

        BSShapeGImpact retGImpact = null;
        lock (GImpacts)
        {
            if (GImpacts.TryGetValue(newMeshKey, out retGImpact))
            {
                // The mesh has already been created. Return a new reference to same.
                retGImpact.IncrementReference();
            }
            else
            {
                retGImpact = new BSShapeGImpact(new BulletShape());
                BulletShape newShape = retGImpact.CreatePhysicalGImpact(physicsScene, prim, newMeshKey, prim.BaseShape, prim.Size, lod);

                // Check to see if mesh was created (might require an asset).
                newShape = VerifyMeshCreated(physicsScene, newShape, prim);
                newShape.shapeKey = newMeshKey;
                if (!newShape.isNativeShape || prim.AssetFailed())
                {
                    // If a mesh was what was created, remember the built shape for later sharing.
                    // Also note that if meshing failed we put it in the mesh list as there is nothing
                    //         else to do about the mesh.
                    GImpacts.Add(newMeshKey, retGImpact);
                }

                retGImpact.physShapeInfo = newShape;
            }
        }
        return retGImpact;
    }