public bool IsChannelUsed(Channel channel)
{
if (isDirectlyUsed[channel.Index])
{
return(true);
}
if (channel.ParentChannel != null)
{
return(true);
}
var dependencyGatheringVisitor = new DependencyGatheringVisitor();
foreach (var formula in channel.SumFormulas)
{
formula.Accept(dependencyGatheringVisitor);
}
foreach (var formula in channel.MultiplyFormulas)
{
formula.Accept(dependencyGatheringVisitor);
}
foreach (var dependency in dependencyGatheringVisitor.Dependencies)
{
if (IsChannelUsed(dependency))
{
return(true);
}
}
return(false);
}
private void GenerateFor(Channel channel)
{
if (visitedChannels.Contains(channel))
{
return;
}
visitedChannels.Add(channel);
//visit dependencies
var dependencyGatheringVisitor = new DependencyGatheringVisitor();
foreach (var formula in channel.SumFormulas)
{
formula.Accept(dependencyGatheringVisitor);
}
foreach (var formula in channel.MultiplyFormulas)
{
formula.Accept(dependencyGatheringVisitor);
}
foreach (var dependency in dependencyGatheringVisitor.Dependencies)
{
GenerateFor(dependency);
}
//setup stack for store
ilGenerator.Emit(OpCodes.Ldarg_2);
ilGenerator.Emit(OpCodes.Ldc_I4, channel.Index);
//load raw value
ilGenerator.Emit(OpCodes.Ldarg_1);
ilGenerator.Emit(OpCodes.Ldc_I4, channel.Index);
ilGenerator.Emit(OpCodes.Ldelem_R8);
//add parent value
if (channel.ParentChannel != null)
{
ilGenerator.Emit(OpCodes.Ldarg_0);
ilGenerator.Emit(OpCodes.Ldc_I4, channel.ParentChannel.Index);
ilGenerator.Emit(OpCodes.Ldelem_R8);
ilGenerator.Emit(OpCodes.Add);
}
foreach (var formula in channel.SumFormulas)
{
formula.Accept(this);
ilGenerator.Emit(OpCodes.Add);
}
foreach (var formula in channel.MultiplyFormulas)
{
formula.Accept(this);
ilGenerator.Emit(OpCodes.Mul);
}
//apply clamp
if (channel.Clamped)
{
ilGenerator.Emit(OpCodes.Ldc_R8, channel.Min);
ilGenerator.Emit(OpCodes.Ldc_R8, channel.Max);
ilGenerator.Emit(OpCodes.Call, EvaluatorHelperMethods.ClampMethodInfo);
}
//store result
ilGenerator.Emit(OpCodes.Stelem_R8);
}
