public override void Activate()
{
var data = Engine.Story.Data;
var oldVar = data.GetVariable(Name);
var eval = ExpressionHandler.EvaluateNumeric(Expression, data);
switch (Operation)
{
case VariableAction.Set:
data.SetVariable(Name, eval);
break;
case VariableAction.Add:
data.SetVariable(Name, oldVar + eval);
break;
case VariableAction.Subtract:
data.SetVariable(Name, oldVar - eval);
break;
case VariableAction.Multiply:
data.SetVariable(Name, oldVar * eval);
break;
case VariableAction.Divide:
data.SetVariable(Name, oldVar / eval);
break;
case VariableAction.Modulus:
data.SetVariable(Name, oldVar % eval);
break;
default:
throw new ArgumentOutOfRangeException();
}
}