public override float EvaluateTestCase(GAIndividual inIndividual, object inInput, object inOutput)
{
int timeSteps = 1000;
float timeDiscritized = 0.01f;
float maxTime = timeSteps * timeDiscritized;
float captureRadius = 0.01f;
ObjectPair xv = (ObjectPair)inInput;
float position = (float)xv._first;
float velocity = (float)xv._second;
for (int step = 1; step <= timeSteps; step++)
{
_interpreter.ClearStacks();
FloatStack fStack = _interpreter.FloatStack();
BooleanStack bStack = _interpreter.BoolStack();
ObjectStack iStack = _interpreter.InputStack();
// Position will be on the top of the stack, and velocity will be
// second.
fStack.Push(position);
fStack.Push(velocity);
// Must be included in order to use the input stack. Uses same order
// as inputs on Float stack.
iStack.Push(position);
iStack.Push(velocity);
_interpreter.Execute(((PushGPIndividual)inIndividual)._program, _executionLimit);
// If there is no boolean on the stack, the program has failed to
// return a reasonable output. So, return a penalty fitness of
// twice the maximum time.
if (bStack.Size() == 0)
{
return(2 * maxTime);
}
// If there is a boolean, use it to compute the next position and
// velocity. Then, check for termination conditions.
// NOTE: If result == True, we will apply the force in the positive
// direction, and if result == False, we will apply the force in
// the negative direction.
bool positiveForce = bStack.Top();
float acceleration;
if (positiveForce)
{
acceleration = 0.5f;
}
else
{
acceleration = -0.5f;
}
velocity = velocity + (timeDiscritized * acceleration);
position = position + (timeDiscritized * velocity);
// Check for termination conditions
if (position <= captureRadius && position >= -captureRadius && velocity <= captureRadius && velocity >= -captureRadius)
{
//Cart is centered, so return time it took.
return(step * timeDiscritized);
}
}
// If here, the cart failed to come to rest in the allotted time. So,
// return the failed error of maxTime.
return(maxTime);
}
// End code iteration functions
//
// Conversion instructions to code
//
public override void Execute(Interpreter inI)
{
ObjectStack codeStack = inI.CodeStack();
BooleanStack bStack = inI.BoolStack();
if (bStack.Size() > 0)
{
codeStack.Push(bStack.Pop());
}
}
protected void setUp()
{
interpreter = new Interpreter();
Program instructionList = new Program("( )");
interpreter.randProgram.SetInstructions(interpreter, instructionList);
istack = new IntStack();
fstack = new FloatStack();
bstack = new BooleanStack();
}
public override void Execute(Interpreter inI)
{
BooleanStack bstack = inI.BoolStack();
if (_stack.Size() > 1)
{
object o1 = _stack.Pop();
object o2 = _stack.Pop();
bstack.Push(o1.Equals(o2));
}
}
public override void Execute(Interpreter inI)
{
BooleanStack bstack = inI.BoolStack();
ObjectStack estack = inI.ExecStack();
if (_stack.Size() > 1 && bstack.Size() > 0)
{
bool istrue = bstack.Pop();
object iftrue = _stack.Pop();
object iffalse = _stack.Pop();
if (istrue)
{
estack.Push(iftrue);
}
else
{
estack.Push(iffalse);
}
}
}
public void PushInput(Interpreter inI, int n)
{
ObjectStack _stack = inI.InputStack();
if (_stack.Size() > n)
{
object inObject = _stack.DeepPeek(n);
if (inObject is int)
{
IntStack istack = inI.IntStack();
istack.Push((int)inObject);
}
else
{
// if (inObject is Number)
// {
// FloatStack fstack = inI.FloatStack();
// fstack.Push(((Number)inObject).FloatValue());
// }
//else
if (inObject is float)
{
FloatStack fstack = inI.FloatStack();
fstack.Push((float)inObject);
}
else
{
if (inObject is bool)
{
BooleanStack bstack = inI.BoolStack();
bstack.Push((bool)inObject);
}
else
{
Console.Error.WriteLine("Error during input.index - object " + inObject.GetType() +
" is not a legal object according to " + this.GetType() + ".");
}
}
}
}
}
public override void Execute(Interpreter inI)
{
BooleanStack stack = inI.BoolStack();
stack.Push(_stack.Size() > 0);
}