void GenMainRoad(Stencil s, TerrainDef roadTerrain, TerrainDef divTerrain, TerrainDef sidewalkTerrain)
{
s.Bound(-3, 0, 3, s.MaxZ)
.BorderTerrain(sidewalkTerrain, (m, p) => IsValidSidewalkTerrain(p.GetTerrain(m)));
s.Bound(-2, 0, 2, s.MaxZ)
.ClearThingsInBounds()
.FillTerrain(roadTerrain);
var s1 = s;
s.Bound(-4, 0, 4, s.MaxZ)
.BorderTerrain(TerrainUtility.Bridge, (m, p) => p.GetTerrain(m).IsWater);
s.FillTerrain(0, 0, 0, s.MaxZ, divTerrain);
s = s.Move(0, roadSpacing.RandomInRange);
while (s.Expand(-2).IsInBounds())
{
if (s.Chance(roadChance))
{
GenSideRoad(s.Left().Move(0, 3), roadTerrain, sidewalkTerrain);
}
if (s.Chance(roadChance))
{
GenSideRoad(s.Right().Move(0, 3), roadTerrain, sidewalkTerrain);
}
s = s.Move(0, roadSpacing.RandomInRange);
}
}