private INode GenerateGrowthInitImpl(FunctionNodesFabric fabric, int maxDepth, int curDepth)
{
INode node = null;
if (curDepth == maxDepth)
{
return(fabric.GetRandomTerminalNode());
}
int nextType;
if (curDepth < _minDepth && _minDepth <= maxDepth)
{
nextType = GetRandomIndex(2);
}
else
{
nextType = GetRandomIndex(3);
}
switch (nextType)
{
case 0:
node = fabric.GetRandomBinNode(
this.GenerateGrowthInitImpl(fabric, maxDepth, curDepth + 1),
this.GenerateGrowthInitImpl(fabric, maxDepth, curDepth + 1)
);
break;
case 1:
node = fabric.GetRandomUnaryNode(
this.GenerateGrowthInitImpl(fabric, maxDepth, curDepth + 1));
break;
case 2:
var isNextConst = _r.Next(100) <= 20;
if (isNextConst && _usedTerminals.Count == fabric.GetTerminalsCount())
{
node = fabric.GetRandomConstNode();
}
else if (_usedTerminals.Count < fabric.GetTerminalsCount())
{
var termNode = fabric.GetRandomTerminalNode(_usedTerminals);
_usedTerminals.Add(termNode.Name);
node = termNode;
}
else
{
node = fabric.GetRandomTerminalNode();
}
break;
default:
break;
}
return(node);
}
public INode GenerateFromStartNode(FunctionNodesFabric fabric, int maxDepth, INode startNode)
{
_usedTerminals.Clear();
if (startNode.GetOpType() == OpType.Term)
{
return(startNode);
}
var children = startNode.GetChildren();
foreach (var child in children)
{
startNode.ReplaceChild(child, this.GenerateGrowthInitImpl(fabric, maxDepth, 0));
}
return(startNode);
}
private INode GenerateFullInitImpl(FunctionNodesFabric fabric, int maxDepth, int curDepth)
{
INode node = null;
if (curDepth == maxDepth)
{
var isNextConst = _r.Next(100) <= 20;
if (isNextConst && _usedTerminals.Count == fabric.GetTerminalsCount())
{
return(fabric.GetRandomConstNode());
}
if (_usedTerminals.Count < fabric.GetTerminalsCount())
{
var termNode = fabric.GetRandomTerminalNode(_usedTerminals);
_usedTerminals.Add(termNode.Name);
return(termNode);
}
return(fabric.GetRandomTerminalNode());
}
var isNextUnary = _r.Next(100) <= 20;
if (isNextUnary)
{
node = fabric.GetRandomUnaryNode(
this.GenerateFullInitImpl(fabric, maxDepth, curDepth + 1)
);
}
else
{
node = fabric.GetRandomBinNode(
this.GenerateFullInitImpl(fabric, maxDepth, curDepth + 1),
this.GenerateFullInitImpl(fabric, maxDepth, curDepth + 1)
);
}
return(node);
}
public INode GenerateGrowthInit(FunctionNodesFabric fabric, int maxDepth)
{
_usedTerminals.Clear();
return(this.GenerateGrowthInitImpl(fabric, maxDepth, 0));
}
