/// <summary>
/// Overridden to read optional point cloud indices.
/// </summary>
/// <param name="msg">Message header.</param>
/// <param name="packet">Data packet.</param>
/// <param name="reader">Data packet reader.</param>
/// <returns></returns>
protected override Error HandleMessage(DataMessage msg, PacketBuffer packet, BinaryReader reader)
{
ShapeCache cache = (msg.ObjectID == 0) ? _transientCache : _shapeCache;
int shapeIndex = (msg.ObjectID == 0) ? _lastTransientIndex : cache.GetShapeIndex(msg.ObjectID);
if (shapeIndex < 0)
{
return(new Error(ErrorCode.InvalidObjectID, msg.ObjectID));
}
PointsComponent pointsComp = cache.GetShapeDataByIndex <PointsComponent>(shapeIndex);
// Read index offset and count.
uint offset = reader.ReadUInt32();
uint count = reader.ReadUInt32();
int[] indices = pointsComp.Indices;
for (uint i = 0; i < count; ++i)
{
indices[i + offset] = reader.ReadInt32();
}
pointsComp.IndicesDirty = true;
if (pointsComp.IndexCount != 0 && offset + count >= pointsComp.IndexCount)
{
// Done. Register for the mesh.
RegisterForMesh(pointsComp);
}
return(new Error());
}
/// <summary>
/// Overridden to handle triangle data in the <paramref name="msg"/>
/// </summary>
/// <param name="msg"></param>
/// <param name="packet"></param>
/// <param name="reader"></param>
/// <returns></returns>
protected override Error HandleMessage(DataMessage msg, PacketBuffer packet, BinaryReader reader)
{
ShapeCache cache = (msg.ObjectID == 0) ? _transientCache : _shapeCache;
int shapeIndex = (msg.ObjectID == 0) ? _lastTransientIndex : cache.GetShapeIndex(msg.ObjectID);
if (shapeIndex < 0)
{
return(new Error(ErrorCode.InvalidObjectID, msg.ObjectID));
}
// Naive support for multiple packets. Assume:
// - In order.
MeshEntry meshEntry = cache.GetShapeDataByIndex <MeshEntry>(shapeIndex);
// Well, this is confusing indirection...
int readComponent = MeshShape.ReadDataComponentDeferred(
reader, (uint)meshEntry.Mesh.VertexCount, (uint)meshEntry.Mesh.IndexCount,
// Vertex handler.
new MeshShape.ComponentBlockReader((MeshShape.SendDataType dataType, BinaryReader reader2, uint offset, uint count) =>
{
return(ReadMeshVector3Data(reader2, offset, count, (Vector3[] buffer, int writeOffset, int writeCount) =>
{
meshEntry.Mesh.SetVertices(buffer, 0, writeOffset, writeCount, true);
}));
}),
// Index handler
new MeshShape.ComponentBlockReader((MeshShape.SendDataType dataType, BinaryReader reader2, uint offset, uint count) =>
{
return(ReadIndexComponent(reader2, offset, count, meshEntry.Mesh));
}),
// Normals handler.
new MeshShape.ComponentBlockReader((MeshShape.SendDataType dataType, BinaryReader reader2, uint offset, uint count) =>
{
return(ReadMeshVector3Data(reader2, offset, count, (Vector3[] buffer, int writeOffset, int writeCount) =>
{
if (dataType == MeshShape.SendDataType.UniformNormal)
{
// Only one normal for the whole mesh.
// Fill the buffer and write in chunks.
for (int i = 1; i < buffer.Length; ++i)
{
buffer[i] = buffer[0];
}
int localOffset = 0;
for (int i = 0; i < meshEntry.Mesh.VertexCount; i += buffer.Length)
{
int blockCount = Math.Min(buffer.Length, meshEntry.Mesh.VertexCount - localOffset);
meshEntry.Mesh.SetNormals(buffer, 0, localOffset, blockCount);
writeOffset += blockCount;
}
}
else
{
meshEntry.Mesh.SetNormals(buffer, 0, writeOffset, writeCount);
}
}));
}),
// Colours handler.
new MeshShape.ComponentBlockReader((MeshShape.SendDataType dataType, BinaryReader reader2, uint offset, uint count) =>
{
return(ReadColourComponent(reader2, offset, count, meshEntry.Mesh));
})
);
if (readComponent == -1)
{
return(new Error(ErrorCode.MalformedMessage, DataMessage.MessageID));
}
if (readComponent == (int)(MeshShape.SendDataType.Vertices | MeshShape.SendDataType.End))
{
// Finalise the material.
meshEntry.Material = CreateMaterial(cache.GetShapeByIndex(shapeIndex), meshEntry);
cache.SetShapeDataByIndex(shapeIndex, meshEntry);
}
return(new Error());
}
