public static object Evaluate(Expression[] expressions, Dictionary <string, object> variables)
{
VariableContext c = Funcs.CreateVariableContext(variables);
object[] result =
expressions
.Select(i => new Mathy.Language.MathyLanguageService().CreateEvaluator().Evaluate(i, c))
.ToArray();
variables.Clear();
foreach (string variableName in c.GetAllVariables())
{
variables.Add(variableName, c.GetValue(variableName));
}
return(result.Length == 1 ? result[0] : result);
}
public void Update()
{
VariableContext vc = CreateVariableContext();
foreach (Step step in Steps)
{
UpdateStepState(step);
_DoStep = step;
if (step.State == StepState.Ready && step.Conditions.Length > 0)
{
try
{
if (!step.EvaluateConditions(vc))
{
step.State = StepState.Skipped;
continue;
}
}
catch (Exception ex)
{
if (ex.InnerException == null)
{
throw;
}
else
{
throw ex.InnerException;
}
}
}
if (step.State == StepState.Ready)
{
try
{
step.Evaluate(vc);
this._vc = vc;
foreach (string key in step.OutVariables)
{
SetValueAcrossSteps(key, _vc.GetValue(key));
}
}
catch (Exception ex)
{
if (ex.InnerException == null)
{
throw;
}
else
{
throw ex.InnerException;
}
}
}
}
variables.Clear();
foreach (string variable in vc.GetAllVariables())
{
SetValue(variable, vc.GetValue(variable));
}
}
private static RenderBranch Create(double x, double y, int angle, TreeBranch branch, VariableContext variables, Graphics g, Font font)
{
double x2 = x - branch.Position * Math.Cos(angle * Math.PI / 180);
double y2 = y + branch.Position * Math.Sin(angle * Math.PI / 180);
double x1 = x2 + branch.Length * Math.Cos((angle + branch.Angle) * Math.PI / 180);
double y1 = y2 - branch.Length * Math.Sin((angle + branch.Angle) * Math.PI / 180);
double a = Funcs.Atan(x1, y1, x2, y2);
x2 = x1 + (branch.Length - 2) * Math.Cos(a);
y2 = y1 - (branch.Length - 2) * Math.Sin(a);
RenderBranch[] branches = branch.Branches.Select(i => Create(x2, y2, angle + branch.Angle - 180, i, variables, g, font)).ToArray();
string description;
double imageX = 0;
double imageY = 0;
Bitmap expressionImage = null;
if (branch is ExpressionBranch)
{
string[] preVariables = variables.GetAllVariables();
Expression[] expressions = new MathyLanguageService().Compile((branch as ExpressionBranch).Expression, variables);
foreach (Expression expression in expressions)
{
new MathyLanguageService().CreateEvaluator().Evaluate(expression, variables);
}
StringBuilder b = new StringBuilder();
foreach (string variableName in variables.GetAllVariables().Where(i => !preVariables.Contains(i)))
{
b.AppendFormat("{0}={1}", variableName, variables.GetValue(variableName));
}
description = branch.Description + "\r\n" + b.ToString();
double xt = x2 + (branch as ExpressionBranch).ImageX * Math.Cos(a + Math.PI);
double yt = y2 - (branch as ExpressionBranch).ImageX * Math.Sin(a + Math.PI);
double d = (branch as ExpressionBranch).ImageY;
imageX = xt + d * Math.Cos(a + Math.PI / 2);
imageY = yt - d * Math.Sin(a + Math.PI / 2);
expressionImage = new NodeVisualizer(expressions.Select(i => new NodeConverter().Convert(i)).ToArray()).VisulizeAsBitmap();
}
else
{
string variableName = (branch as VariableBranch).VariableName;
object value = variables.GetValue(variableName);
description = string.Format("{0}\r\n{1}={2}", branch.Description, variableName, value);
}
double dx;
double dy;
EvaluateDescriptionPosition(branch, description, x1, y1, x2, y2, g, font, out dx, out dy);
return(new RenderBranch()
{
X1 = x1,
Y1 = y1,
X2 = x2,
Y2 = y2,
IsVariable = branch is VariableBranch,
ImageX = imageX,
ImageY = imageY,
Image = expressionImage,
Branches = branches,
DescriptionX = dx,
DescriptionY = dy,
Description = description
});
}