/// <summary>
/// Read additional index data for the cloud.
/// </summary>
/// <param name="reader">Stream to read from</param>
/// <returns>True on success.</returns>
/// <remarks>
/// Reads additional index data if required.
///
/// Fails if the <see cref="DataMessage.ObjectID"/> does not match <see cref="Shape.ID"/>.
/// </remarks>
public override bool ReadData(BinaryReader reader)
{
DataMessage msg = new DataMessage();
if (!msg.Read(reader))
{
return(false);
}
if (msg.ObjectID != ID)
{
return(false);
}
uint offset = reader.ReadUInt32();
uint itemCount = reader.ReadUInt32();
if (offset + itemCount > 0)
{
if (_indices == null || offset + itemCount > _indices.Length)
{
return(false);
}
}
for (uint i = offset; i < offset + itemCount; ++i)
{
_indices[i] = reader.ReadUInt32();
}
return(true);
}
/// <summary>
/// Read <see cref="DataMessage"/> and payload generated by <see cref="WriteData(PacketBuffer, ref uint)"/>.
/// </summary>
/// <param name="reader">Stream to read from</param>
/// <returns>True on success.</returns>
public override bool ReadData(BinaryReader reader)
{
DataMessage msg = new DataMessage();
if (!msg.Read(reader))
{
return(false);
}
if (ID != msg.ObjectID)
{
return(false);
}
ArrayComponentAdaptor <Vector3> normalsAdaptor = new ArrayComponentAdaptor <Vector3>(_normals);
ColoursAdaptor coloursAdaptor = new ColoursAdaptor(_colours);
int readComponent = ReadDataComponent(reader,
new ArrayComponentAdaptor <Vector3>(_vertices),
new ArrayComponentAdaptor <int>(_indices),
normalsAdaptor, coloursAdaptor);
if (readComponent == -1)
{
return(false);
}
// Normals and colours may have been (re)allocated. Store the results.
switch (readComponent & ~(int)(SendDataType.End | SendDataType.ExpectEnd))
{
case (int)SendDataType.Normals:
case (int)SendDataType.UniformNormal:
// Normals array may have been (re)allocated.
_normals = normalsAdaptor.Array;
break;
case (int)SendDataType.Colours:
// Colours array may have been (re)allocated.
_colours = coloursAdaptor.Array;
break;
}
// Check for finalisation.
// Complete if ((readComponent & (int)SendDataType.End) != 0)
return(true);
}
/// <summary>
/// Message routing function.
/// </summary>
/// <param name="messageID">The ID of the message.</param>
/// <param name="packet">Packet buffer used to decode the message.</param>
/// <param name="reader">The reader from which additional message data may be read.</param>
/// <returns>An error code on failure.</returns>
/// <remarks>
/// The default implementation handles the following messages:
/// Routes the following messages:
/// <list type="bullet">
/// <item><see cref="ObjectMessageID.Create"/></item>
/// <item><see cref="ObjectMessageID.Update"/></item>
/// <item><see cref="ObjectMessageID.Destroy"/></item>
/// <item><see cref="ObjectMessageID.Data"/></item>
/// </list>
/// </remarks>
protected virtual Error HandleMessage(ushort messageID, PacketBuffer packet, BinaryReader reader)
{
switch ((ObjectMessageID)messageID)
{
default:
case ObjectMessageID.Null:
return(new Error(ErrorCode.InvalidMessageID, messageID));
case ObjectMessageID.Create:
// Read the create message details.
CreateMessage create = new CreateMessage();
if (!create.Read(reader))
{
return(new Error(ErrorCode.InvalidContent, messageID));
}
if (!FilterMessage(messageID, create.ObjectID, create.Category))
{
return(new Error());
}
return(HandleMessage(create, packet, reader));
case ObjectMessageID.Update:
// Read the create message details.
UpdateMessage update = new UpdateMessage();
if (!update.Read(reader))
{
return(new Error(ErrorCode.InvalidContent, messageID));
}
if (!FilterMessage(messageID, update.ObjectID, 0))
{
return(new Error());
}
return(HandleMessage(update, packet, reader));
case ObjectMessageID.Destroy:
// Read the create message details.
DestroyMessage destroy = new DestroyMessage();
if (!destroy.Read(reader))
{
return(new Error(ErrorCode.InvalidContent, messageID));
}
if (!FilterMessage(messageID, destroy.ObjectID, 0))
{
return(new Error());
}
return(HandleMessage(destroy, packet, reader));
case ObjectMessageID.Data:
// Read the create message details.
DataMessage data = new DataMessage();
if (!data.Read(reader))
{
return(new Error(ErrorCode.InvalidContent, messageID));
}
if (!FilterMessage(messageID, data.ObjectID, 0))
{
return(new Error());
}
return(HandleMessage(data, packet, reader));
}
//return new Error();
}