Concrete implementation of an INetworkNode.
Inheritance: INetworkNode
Ejemplo n.º 1
0
        /// <summary>
        /// Reads a network definition from XML.
        /// An activation function library is required to decode the function ID at each node, typically the
        /// library is stored alongside the network definition XML and will have already been read elsewhere and
        /// passed in here.
        /// </summary>
        /// <param name="xr">The XmlReader to read from.</param>
        /// <param name="activationFnLib">The activation function library used to decode node activation function IDs.</param>
        /// <param name="nodeFnIds">Indicates if node activation function IDs should be read. They are required
        /// for HyperNEAT genomes but not NEAT</param>
        public static NetworkDefinition ReadNetworkDefinition(XmlReader xr, IActivationFunctionLibrary activationFnLib, bool nodeFnIds)
        {
            // Find <Network>.
            XmlIoUtils.MoveToElement(xr, false, __ElemNetwork);
            int initialDepth = xr.Depth;

            // Find <Nodes>.
            XmlIoUtils.MoveToElement(xr, true, __ElemNodes);

            // Create a reader over the <Nodes> sub-tree.
            int      inputNodeCount  = 0;
            int      outputNodeCount = 0;
            NodeList nodeList        = new NodeList();

            using (XmlReader xrSubtree = xr.ReadSubtree())
            {
                // Re-scan for the root <Nodes> element.
                XmlIoUtils.MoveToElement(xrSubtree, false);

                // Move to first node elem.
                XmlIoUtils.MoveToElement(xrSubtree, true, __ElemNode);

                // Read node elements.
                do
                {
                    NodeType nodeType = ReadAttributeAsNodeType(xrSubtree, __AttrType);
                    uint     id       = XmlIoUtils.ReadAttributeAsUInt(xrSubtree, __AttrId);
                    int      fnId     = 0;
                    double[] auxState = null;
                    if (nodeFnIds)
                    {   // Read activation fn ID.
                        fnId = XmlIoUtils.ReadAttributeAsInt(xrSubtree, __AttrActivationFunctionId);

                        // Read aux state as comma separated list of real values.
                        auxState = XmlIoUtils.ReadAttributeAsDoubleArray(xrSubtree, __AttrAuxState);
                    }

                    // TODO: Read node aux state data.
                    NetworkNode node = new NetworkNode(id, nodeType, fnId, auxState);
                    nodeList.Add(node);

                    // Track the number of input and output nodes.
                    switch (nodeType)
                    {
                    case NodeType.Input:
                        inputNodeCount++;
                        break;

                    case NodeType.Output:
                        outputNodeCount++;
                        break;
                    }
                }while(xrSubtree.ReadToNextSibling(__ElemNode));
            }

            // Find <Connections>.
            XmlIoUtils.MoveToElement(xr, false, __ElemConnections);

            // Create a reader over the <Connections> sub-tree.
            ConnectionList connList = new ConnectionList();

            using (XmlReader xrSubtree = xr.ReadSubtree())
            {
                // Re-scan for the root <Connections> element.
                XmlIoUtils.MoveToElement(xrSubtree, false);

                // Move to first connection elem.
                string localName = XmlIoUtils.MoveToElement(xrSubtree, true);
                if (localName == __ElemConnection)
                {   // We have at least one connection.
                    // Read connection elements.
                    do
                    {
                        uint              srcId  = XmlIoUtils.ReadAttributeAsUInt(xrSubtree, __AttrSourceId);
                        uint              tgtId  = XmlIoUtils.ReadAttributeAsUInt(xrSubtree, __AttrTargetId);
                        double            weight = XmlIoUtils.ReadAttributeAsDouble(xrSubtree, __AttrWeight);
                        NetworkConnection conn   = new NetworkConnection(srcId, tgtId, weight);
                        connList.Add(conn);
                    }while(xrSubtree.ReadToNextSibling(__ElemConnection));
                }
            }

            // Move the reader beyond the closing tags </Connections> and </Network>.
            do
            {
                if (xr.Depth <= initialDepth)
                {
                    break;
                }
            }while(xr.Read());

            // Construct and return loaded network definition.
            return(new NetworkDefinition(inputNodeCount, outputNodeCount, activationFnLib, nodeList, connList));
        }
Ejemplo n.º 2
0
        /// <summary>
        /// Reads a network definition from XML. 
        /// An activation function library is required to decode the function ID at each node, typically the
        /// library is stored alongside the network definition XML and will have already been read elsewhere and
        /// passed in here.
        /// </summary>
        /// <param name="xr">The XmlReader to read from.</param>
        /// <param name="activationFnLib">The activation function library used to decode node activation function IDs.</param>
        /// <param name="nodeFnIds">Indicates if node activation function IDs should be read. They are required
        /// for HyperNEAT genomes but not NEAT</param>
        public static NetworkDefinition ReadNetworkDefinition(XmlReader xr, IActivationFunctionLibrary activationFnLib, bool nodeFnIds)
        {
            // Find <Network>.
            XmlIoUtils.MoveToElement(xr, false, __ElemNetwork);
            int initialDepth = xr.Depth;

            // Find <Nodes>.
            XmlIoUtils.MoveToElement(xr, true, __ElemNodes);
            
            // Create a reader over the <Nodes> sub-tree.
            int inputNodeCount = 0;
            int outputNodeCount = 0;
            NodeList nodeList = new NodeList();
            using(XmlReader xrSubtree = xr.ReadSubtree())
            {
                // Re-scan for the root <Nodes> element.
                XmlIoUtils.MoveToElement(xrSubtree, false);

                // Move to first node elem.
                XmlIoUtils.MoveToElement(xrSubtree, true, __ElemNode);

                // Read node elements.
                do
                {
                    NodeType nodeType = ReadAttributeAsNodeType(xrSubtree, __AttrType);
                    uint id = XmlIoUtils.ReadAttributeAsUInt(xrSubtree, __AttrId);
                    int fnId = 0;
                    double[] auxState = null;
                    if(nodeFnIds) 
                    {   // Read activation fn ID.
                        fnId = XmlIoUtils.ReadAttributeAsInt(xrSubtree, __AttrActivationFunctionId);

                        // Read aux state as comma separated list of real values.
                        auxState = XmlIoUtils.ReadAttributeAsDoubleArray(xrSubtree, __AttrAuxState);
                    }

                    // TODO: Read node aux state data.
                    NetworkNode node = new NetworkNode(id, nodeType, fnId, auxState);
                    nodeList.Add(node);

                    // Track the number of input and output nodes.
                    switch(nodeType)
                    {
                        case NodeType.Input:
                            inputNodeCount++;
                            break;
                        case NodeType.Output:
                            outputNodeCount++;
                            break;
                    }
                } 
                while(xrSubtree.ReadToNextSibling(__ElemNode));
            }

            // Find <Connections>.
            XmlIoUtils.MoveToElement(xr, false, __ElemConnections);

            // Create a reader over the <Connections> sub-tree.
            ConnectionList connList = new ConnectionList();
            using(XmlReader xrSubtree = xr.ReadSubtree())
            {
                // Re-scan for the root <Connections> element.
                XmlIoUtils.MoveToElement(xrSubtree, false);

                // Move to first connection elem.
                string localName = XmlIoUtils.MoveToElement(xrSubtree, true);
                if(localName == __ElemConnection)
                {   // We have at least one connection.
                    // Read connection elements.
                    do
                    {
                        uint srcId = XmlIoUtils.ReadAttributeAsUInt(xrSubtree, __AttrSourceId);
                        uint tgtId = XmlIoUtils.ReadAttributeAsUInt(xrSubtree, __AttrTargetId);
                        double weight = XmlIoUtils.ReadAttributeAsDouble(xrSubtree, __AttrWeight);
                        NetworkConnection conn = new NetworkConnection(srcId, tgtId, weight);
                        connList.Add(conn);
                    } 
                    while(xrSubtree.ReadToNextSibling(__ElemConnection));
                }
            }

            // Move the reader beyond the closing tags </Connections> and </Network>.
            do
            {
                if (xr.Depth <= initialDepth) {
                    break;
                }
            }
            while(xr.Read());

            // Construct and return loaded network definition.
            return new NetworkDefinition(inputNodeCount, outputNodeCount, activationFnLib, nodeList, connList);
        }