public void With_dp(int x, int y, DirectionPointer dp)
{
var expected = new Codel(x, y);
var next = new Codel(0, 0).Next(dp);
Assert.AreEqual(expected, next);
}
/// <summary>Moves to the next codel based on the <see cref="DirectionPointer"/>.</summary>
public Codel Next(DirectionPointer dp)
{
return(dp switch
{
DirectionPointer.right => /**/ new Codel(X + 1, Y + 0),
DirectionPointer.left => /* */ new Codel(X - 1, Y + 0),
DirectionPointer.top => /* */ new Codel(X + 0, Y - 1),
DirectionPointer.down => /* */ new Codel(X + 0, Y + 1),
_ => throw new ArgumentOutOfRangeException(nameof(dp)),
});
public void From_1x1_form(DirectionPointer dp, CodelChooser cc)
{
var expected = new Codel(9, 0);
var program = Runner.Load("fibonacci_numbers.gif");
var block = program.SelectBlock(expected);
var pointer = Pointer.Initial.Rotate((int)dp).Switch((int)cc);
var actual = block.Edge(pointer);
Assert.AreEqual(expected, actual);
}
public void From_complex_form(int x, int y, DirectionPointer dp, CodelChooser cc)
{
var expected = new Codel(x, y);
var program = Runner.Load("Snippets.edge.png");
var block = program.SelectBlock(new Codel(2, 2));
var pointer = Pointer.Initial.Rotate((int)dp).Switch((int)cc);
var actual = block.Edge(pointer);
Assert.AreEqual(expected, actual);
}
public static DirectionPointer Rotate(this DirectionPointer dp, long steps)
{
return((DirectionPointer)((long)dp + steps).Modulo(4));
}
public void With_dp_and_steps(DirectionPointer direction, int steps, DirectionPointer expected)
{
var rotated = direction.Rotate(steps);
Assert.AreEqual(expected, rotated);
}
public Codel FindFurthestCodel(DirectionPointer dp, CodelChooser cc)
{
int xFactor = 0, yFactor = 0;
switch (dp)
{
case DirectionPointer.Right:
xFactor = 1;
break;
case DirectionPointer.Down:
yFactor = 1;
break;
case DirectionPointer.Left:
xFactor = -1;
break;
case DirectionPointer.Up:
yFactor = -1;
break;
}
var edge = Codels.GroupBy(x => x.Position.x * xFactor + x.Position.y * yFactor).OrderBy(x => x.Key).Last();
xFactor = 0; yFactor = 0;
switch (dp)
{
case DirectionPointer.Right:
switch (cc)
{
case CodelChooser.Left:
yFactor = -1;
break;
case CodelChooser.Right:
yFactor = 1;
break;
}
break;
case DirectionPointer.Down:
switch (cc)
{
case CodelChooser.Left:
xFactor = 1;
break;
case CodelChooser.Right:
xFactor = -1;
break;
}
break;
case DirectionPointer.Left:
switch (cc)
{
case CodelChooser.Left:
yFactor = 1;
break;
case CodelChooser.Right:
yFactor = -1;
break;
}
break;
case DirectionPointer.Up:
switch (cc)
{
case CodelChooser.Left:
xFactor = -1;
break;
case CodelChooser.Right:
xFactor = 1;
break;
}
break;
}
var codel = edge.OrderBy(x => x.Position.x * xFactor + x.Position.y * yFactor).Last();
return codel;
}
