/// <summary>
/// Evaluate residential zone.
/// </summary>
/// <param name="pos"></param>
/// <param name="traf"></param>
/// <returns></returns>
public short EvalRes(Position pos, int traf)
{
short value;
if (traf < 0)
{
return(-3000);
}
value = LandValueMap.WorldGet(pos.X, pos.Y);
value -= PollutionDensityMap.WorldGet(pos.X, pos.Y);
if (value < 0)
{
value = 0; /* Cap at 0 */
}
else
{
value = (short)Math.Min(value * 32, 6000); /* Cap at 6000 */
}
value = (short)(value - 3000);
return(value);
}
/// <summary>
/// Perform residential immigration into the current residential tile.
/// </summary>
/// <param name="pos">Position of the tile.</param>
/// <param name="pop">Population ?</param>
/// <param name="value">Land value corrected for pollution.</param>
public void DoResIn(Position pos, int pop, int value)
{
short pollution = PollutionDensityMap.WorldGet(pos.X, pos.Y);
if (pollution > 128)
{
return;
}
ushort tile = (ushort)(Map[pos.X, pos.Y] & (ushort)MapTileBits.LowMask);
if (tile == (ushort)MapTileCharacters.FREEZ)
{
if (pop < 8)
{
BuildHouse(pos, value);
IncRateOfGrowth(pos, 1);
return;
}
if (PopulationDensityMap.WorldGet(pos.X, pos.Y) > 64)
{
ResPlop(pos, 0, value);
IncRateOfGrowth(pos, 8);
return;
}
return;
}
if (pop < 40)
{
ResPlop(pos, (pop / 8) - 1, value);
IncRateOfGrowth(pos, 8);
}
}
/// <summary>
/// Compute land value at \a pos, taking pollution into account.
/// </summary>
/// <param name="pos"></param>
/// <returns>Indication of land-value adjusted for pollution (\c 0 => low value, \c 3 => high value)</returns>
public short GetLandPollutionValue(Position pos)
{
short landVal;
landVal = LandValueMap.WorldGet(pos.X, pos.Y);
landVal -= PollutionDensityMap.WorldGet(pos.X, pos.Y);
if (landVal < 30)
{
return(0);
}
if (landVal < 80)
{
return(1);
}
if (landVal < 150)
{
return(2);
}
return(3);
}