private static IntVec3 getMinNeighbor(int x, int z, IntVec3 direction, IntVec3 step1, IntVec3 step2, int[,] riverMap, int width, int height, ModuleBase moduleBase)
{
IntVec3 intVec = new IntVec3(x, 0, z) + direction;
return(new List <IntVec3>
{
intVec,
intVec + step1,
intVec + step2
}.MinBy((IntVec3 v) => MapGen.getValue(v, width, height, moduleBase, true)));
}
private static float getValue(IntVec3 coords, int width, int height, ModuleBase perlin, bool maxForOutOfBounds = true)
{
return(MapGen.getValue(coords.x, coords.z, width, height, perlin, maxForOutOfBounds));
}
public static int[,] GenRiver(int width, int height, ModuleBase moduleBase = null)
{
int[,] array = new int[width, height];
if (moduleBase == null)
{
moduleBase = new Perlin(0.020999999729877948, 2.1, 0.6, 7, Rand.Range(0, 2147483647), QualityMode.High);
moduleBase = new ScaleBias(0.5, 0.5, moduleBase);
}
int num = 0;
int num2 = 0;
float num3 = 3.40282347E+38f;
IntVec3 direction = IntVec3.Invalid;
IntVec3 intVec = IntVec3.Invalid;
IntVec3 intVec2 = IntVec3.Invalid;
for (int i = 0; i < width; i++)
{
float value = MapGen.getValue(i, 0, width, height, moduleBase, true);
if (value < num3)
{
num = i;
num2 = 0;
num3 = value;
direction = IntVec3.North;
intVec = IntVec3.East;
intVec2 = IntVec3.West;
}
value = MapGen.getValue(i, height - 1, width, height, moduleBase, true);
if (value < num3)
{
num = i;
num2 = height - 1;
num3 = value;
direction = IntVec3.South;
intVec = IntVec3.East;
intVec2 = IntVec3.West;
}
}
for (int j = 0; j < height; j++)
{
float value2 = MapGen.getValue(0, j, width, height, moduleBase, true);
if (value2 < num3)
{
num = 0;
num2 = j;
num3 = value2;
direction = IntVec3.East;
intVec = IntVec3.North;
intVec2 = IntVec3.South;
}
value2 = MapGen.getValue(width - 1, j, width, height, moduleBase, true);
if (value2 < num3)
{
num = width - 1;
num2 = j;
num3 = value2;
direction = IntVec3.West;
intVec = IntVec3.North;
intVec2 = IntVec3.South;
}
}
while (num >= 0 && num2 >= 0 && num < width && num2 < height)
{
IntVec3 intVec3 = new IntVec3(num, 0, num2);
foreach (IntVec3 current in new List <IntVec3>
{
intVec3,
intVec3 + intVec,
intVec3 + intVec2,
intVec3 + intVec + intVec,
intVec3 + intVec2 + intVec2
})
{
int x = current.x;
int z = current.z;
if (x >= 0 && z >= 0 && x < width && z < height)
{
array[x, z] = 1;
}
}
IntVec3 minNeighbor = MapGen.getMinNeighbor(num, num2, direction, intVec, intVec2, array, width, height, moduleBase);
num = minNeighbor.x;
num2 = minNeighbor.z;
}
return(array);
}