func neuronAddOutlinkTo(neuron *ng.Neuron, targetNodeId *ng.NodeId) *ng.OutboundConnection {
cortex := neuron.Cortex
switch targetNodeId.NodeType {
case ng.NEURON:
// make an outbound connection neuron -> targetNodeId
chosenNeuron := cortex.FindNeuron(targetNodeId)
connection := ng.ConnectOutbound(neuron, chosenNeuron)
// make an inbound connection targetNodeId <- neuron
weights := randomWeights(1)
ng.ConnectInboundWeighted(chosenNeuron, neuron, weights)
return connection
case ng.ACTUATOR:
chosenActuator := cortex.FindActuator(targetNodeId)
// make an outbound connection neuron -> targetNodeId
connection := ng.ConnectOutbound(neuron, chosenActuator)
// make an inbound connection targetNodeId <- neuron
ng.ConnectInbound(chosenActuator, neuron)
return connection
default:
log.Panicf("unexpected chosen node type")
return nil
}
}
func Outsplice(cortex *ng.Cortex, chooseOutbound OutboundChooser) (bool, *ng.Neuron) {
numAttempts := len(cortex.AllNodeIds()) * 5
for i := 0; i < numAttempts; i++ {
neuronA := randomNeuron(cortex)
outbound := chooseOutbound(neuronA)
if outbound == nil {
continue
}
if neuronA.NodeId.UUID == outbound.NodeId.UUID {
continue
}
nodeIdB := outbound.NodeId
// figure out which layer neuronK will go in
nodeIdLayerMap := cortex.NodeIdLayerMap()
layerA := neuronA.NodeId.LayerIndex
layerB := nodeIdB.LayerIndex
layerK := nodeIdLayerMap.LayerBetweenOrNew(layerA, layerB)
// create neuron K
neuronK := cortex.CreateNeuronInLayer(layerK)
// disconnect neuronA <-> nodeB
nodeBConnector := cortex.FindInboundConnector(nodeIdB)
ng.DisconnectOutbound(neuronA, nodeIdB)
ng.DisconnectInbound(nodeBConnector, neuronA)
// connect neuronA -> neuronK
weights := randomWeights(1)
ng.ConnectOutbound(neuronA, neuronK)
ng.ConnectInboundWeighted(neuronK, neuronA, weights)
// connect neuronK -> nodeB
switch nodeIdB.NodeType {
case ng.NEURON:
neuronB := cortex.FindNeuron(nodeIdB)
ng.ConnectOutbound(neuronK, neuronB)
ng.ConnectInboundWeighted(nodeBConnector, neuronK, weights)
case ng.ACTUATOR:
actuatorB := cortex.FindActuator(nodeIdB)
ng.ConnectOutbound(neuronK, actuatorB)
ng.ConnectInbound(nodeBConnector, neuronK)
}
return true, neuronK
}
return false, nil
}