public void Step()
{
if (CurrentTime < 0)
{
return;
}
++CurrentTime;
// Do emulation
foreach (int id in Photons.Keys.ToList())
{
if (!Photons.ContainsKey(id))
{
continue;
}
Photon p = Photons[id];
// update position
p.Advance();
if (!IsInBound(p.position))
{
Photons.Remove(id);
}
else
{
// Find out what is there
Cell there = this[p.position];
switch (there.type)
{
case CellType.EMPTY:
break;
case CellType.MIRROR:
switch (there.param)
{
case 0: // -
if (p.direction.y == 0)
{
Photons.Remove(id);
}
else
{
p.Reflect();
}
break;
case 1: // /
if (p.direction.y == 0)
{
p.TurnLeft();
}
else
{
p.TurnRight();
}
break;
case 2: // |
if (p.direction.x == 0)
{
Photons.Remove(id);
}
else
{
p.Reflect();
}
break;
case 3: // \
if (p.direction.x == 0)
{
p.TurnLeft();
}
else
{
p.TurnRight();
}
break;
}
break;
case CellType.GENERATOR:
GeneratePhoton(there.param, p.position, p.direction);
p.Reflect();
break;
case CellType.SLUICE:
p.SetDirection(DirectionIdToVector(there.param));
break;
case CellType.PROCESS:
GeneratePhoton(p.value, p.position, DirRotateCCW90(p.direction));
GeneratePhoton(p.value, p.position, DirRotateCW90(p.direction));
Photons.Remove(id);
break;
case CellType.TARPIT:
// I am stuck in the pit
if (p.direction == Vector2Int.zero)
{
break;
}
// I come to the pit
if (there.tarpitId == 0)
{
// No others are in the pit
p.SetDirection(Vector2Int.zero); // I'm stuck
this[p.position] = there.SetTarpitId(id);
}
else
{
// Someone is in the pit
int thereValue = Photons[there.tarpitId].value;
int newValue;
switch (there.param)
{
case 0: newValue = thereValue + p.value; break;
case 1: newValue = thereValue - p.value; break;
case 2: newValue = thereValue * p.value; break;
case 3: newValue = p.value == 0 ? 0 : thereValue / p.value; break;
case 4: newValue = p.value == 0 ? 0 : thereValue % p.value; break;
default: newValue = 0; break;
}
GeneratePhoton(newValue, p.position, p.direction);
Photons.Remove(id);
Photons.Remove(there.tarpitId);
this[p.position] = there.SetTarpitId(0);
//Debug.Log($"Photon id {there.tarpitId} in tarpit removed");
}
break;
case CellType.INPUT:
Photons.Remove(id);
break;
case CellType.OUTPUT:
output.Add(p.value);
Photons.Remove(id);
break;
case CellType.WALL:
Photons.Remove(id);
break;
}
}
if (Photons.ContainsKey(id))
{
Photons[id] = p;
//Debug.Log($"Photon id {id} updated to {p}");
}
else
{
//Debug.Log($"Photon id {id} removed");
}
}
// Generate photon from input
if (CurrentTime % InputSpeed == 0)
{
int id = InputIndex;
if (id < input.Count)
{
GeneratePhoton(input[id], inputPosition, inputDirection);
}
}
}
