public void FlowProportional(ref float[,] flowStep, Loc l)
{
Dictionary <Loc, float> neighbors = MapUtil.GetValidNeighbors(Elevation, l, false); // Flow Proportional
float localHeight = Elevation[l.x, l.y];
Dictionary <Loc, float> lowerNeighbors = new Dictionary <Loc, float>();
float fDiff;
float totalDiff = 0f;
foreach (KeyValuePair <Loc, float> n in neighbors)
{
if (n.Value < localHeight)
{
fDiff = localHeight - n.Value;
lowerNeighbors[n.Key] = fDiff;
totalDiff += fDiff;
}
}
if (lowerNeighbors.Count > 0)
{
foreach (KeyValuePair <Loc, float> n in lowerNeighbors)
{
flowStep[n.Key.x, n.Key.y] += Water[l.x, l.y] * n.Value / totalDiff;
}
}
else
{
float newElev = MapUtil.GetNeighborAverage(Elevation, l);
newElev = (newElev + Elevation[l.x, l.y]) / 2f;
Elevation[l.x, l.y] = newElev;
}
}