private void updateRangeListAtXZ(List <Range1D> heightRanges, Coord pRelCoord, bool solidBlockRemoved, SurroundingSurfaceValues ssvs)
{
DiscreteDomainRangeList <LightColumn> liCols = m_lightColumnMap[pRelCoord.x, pRelCoord.z];
if (!solidBlockRemoved && heightRanges.Count <= 1) // equal zero would be down right silly.
{
return;
}
// y above highest extent?
int highestDiscontinuity = liCols.highestExtent();
int lowestSurroundingLevel = ssvs.lowestValue();
//CASE WHERE A BLOCK IS ADDED TO THE TOP OF OR OVER TOP OF THE SURFACE
if (pRelCoord.y > highestDiscontinuity && !solidBlockRemoved)
{
// Y MUST BE THE TOP BLOCK?
int hRangeCount = heightRanges.Count;
SimpleRange between = discontinuityBetween(heightRanges[hRangeCount - 2], heightRanges[hRangeCount - 1]);
if (!between.isErsatzNull())
{
AssertUtil.Assert(pRelCoord.y == between.extentMinusOne(), "confused. y is " + pRelCoord.y + " between range is " + between.toString());
int lightValue = pRelCoord.y >= lowestSurroundingLevel? (int)Window.LIGHT_LEVEL_MAX_BYTE : 0;
LightColumn licol = new LightColumn(PTwo.PTwoXZFromCoord(pRelCoord), (byte)lightValue, between);
liCols.Add(licol);
return; // licol;
}
throw new Exception("don't want to be here. we think a block couldn't be placed vertically in between at this point");
}
//TODO handle case where y is above surface, solid block removed
// need to destroy some discon ranges (not incorporate y).
Range1D highest = heightRanges[heightRanges.Count - 1];
if (pRelCoord.y > highest.extent())
{
liCols.RemoveStartAbove(highest.extent());
}
else
{
LightColumn newCol = liCols.Incorporate(pRelCoord.y, solidBlockRemoved);
if (newCol != null)
{
newCol.coord = new PTwo(pRelCoord.x, pRelCoord.z);
}
// throw new Exception("lots of exceptions. we failed to incorp a solid block added.");
}
b.bug("we incorporated a pRelCOord: " + pRelCoord.toString() + "solid removed was: " + solidBlockRemoved);
m_lightColumnMap[pRelCoord.x, pRelCoord.z] = liCols;
}