public SpaceState(Area a, PGISlotItem it)
{
item = null;
index = -1;
area = a;
item = it;
}
public SpaceState(int i, PGISlotItem it)
{
item = null;
index = i;
area = new Area(-1, -1, -1, -1);
item = it;
}
bool Push(Area area, PGISlotItem item)
{
if (!HasSpaceAt(area))
{
return(false);
}
History.Push(new SpaceState(area, item));
Set(area, true);
return(true);
}
/// <summary>
/// Sets the state for a given area in the simulation grid.
/// Remember that <c>true</c> means 'occupied' and <c>false</c>
/// means 'empty'.
/// </summary>
/// <param name="area"></param>
/// <param name="state"></param>
public void Set(Area area, bool state)
{
int startX = area.x;
int startY = area.y;
for (int y = startY; y < startY + area.height; y++)
{
for (int x = startX; x < startX + area.width; x++)
{
Grid[x, y] = state;
}
}
}
SpaceState FindFirstAvailableGridLocation(PGISlotItem item)
{
for (int y = 0; y < Height; y++)
{
for (int x = 0; x < Width; x++)
{
Area a = new Area(x, y, item.CellWidth, item.CellHeight);
if (HasSpaceAt(a))
{
return(new SpaceState(a, item));
}
}
}
return(SpaceState.Invalid);
}
bool HasSpaceAt(Area area)
{
int startX = area.x;
int startY = area.y;
for (int y = startY; y < startY + area.height; y++)
{
for (int x = startX; x < startX + area.width; x++)
{
if (Grid[x, y])
{
return(false);
}
}
}
return(true);
}