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Looping over 3D array in parallel.for

I have a 3D array with arbitrary X, Y and Z lengths
I want to iterate over it in a parallel.for loop, which can't be nested without wasting tasks afaik
Instead, the single loop's length is ArrayLengthX * ArrayLengthY * ArrayLengthZ
Can I mathematically get the current 3D array element from the current iteration + the X, Y and Z length of the array? if so how?
edit : Example below, hope this is enough to understand what's going on
DimensionSettings dimensionSettings = dimension.Settings;
Vector3Int DimSize = dimensionSettings.GetDimensionSize();
TaskProgressMutex.WaitOne();
CurrentProgress = 0;
TotalProgress = DimSize.x * DimSize.y * DimSize.z;
TaskProgressMutex.ReleaseMutex();
int ChunkAmount = DimSize.x * DimSize.y * DimSize.z;
GD.Print("Chunks to generate : " + ChunkAmount);
ParallelLoopResult result = Parallel.For(0, ChunkAmount, (int i) =>
{
GD.Print(i);
int xcoords = ???;
int ycoords = ???;
int zcoords = ???;
Vector3Int ChunkCoords = new Vector3Int(xcoords, ycoords, zcoords);
GD.Print("Current Chunk : " + xcoords + " " + ycoords + " " + zcoords);
GenerateChunk(ChunkCoords, seed);
TaskProgressMutex.WaitOne();
CurrentProgress += 1;
//GD.Print("Chunk " + xcoords + " " + ycoords + " " + zcoords + " finished generating. Current Progress : " + CurrentProgress);
TaskProgressMutex.ReleaseMutex();
});

My suggestion is to parallelize only the outer loop (the X dimension), and do normal (non-parallel) inner loops for the Y and Z dimensions:
ParallelOptions options = new()
{
MaxDegreeOfParallelism = Environment.ProcessorCount
};
Parallel.For(0, dimSize.X, options, (int x) =>
{
for (int y = 0; y < dimSize.Y; y++)
{
for (int z = 0; z < dimSize.Z; z++)
{
Vector3Int chunkCoords = new (x, y, z);
GenerateChunk(chunkCoords, seed);
}
}
});
The idea is to increase the chunkiness of the parallel work. In general the more chunky is the workload, the less is the overall overhead of the parallelization. At the other extreme, if each unit of work is too chunky, the partitioning of the work may become imbalanced.
Also when you use the Parallel.For/Parallel.ForEach/Parallel.Invoke methods I am suggesting to specify always the MaxDegreeOfParallelism, although this suggestion deviates from the general advice offered in the official documentation.

How to put multiple lines in NetTelegramBot KeybrardMarkup?

I'm making a telegram bot with c#.
I want to read a number of names (not more than 20 tough thy could be less) and give them to the user as keyboardMarkup. With a one dimensional array they go all in one line and it's unreadable. I wanted to make 4 line with 5 names so i tried a 4x5 array. But i get this error
Error CS0029 Cannot implicitly convert type 'NetTelegramBotApi.Types.KeyboardButton[,]' to 'NetTelegramBotApi.Types.KeyboardButton[][]'
if (text == "/lista")
{
// Read a text file line by line.
listapz = System.IO.File.ReadAllLines("listapz.txt");
string selezione = "Seleziona il paziente:";
int i = 0;
int x = 0;
int y = 0;
var arrays = new KeyboardButton[4,5];
for (i = 0; i < listapz.Length; i++)
{
y = i / 5;
x = i - (y * 5);
arrays[y,x] = new KeyboardButton("$" + (i + 1) + " " + listapz[i]);
selezione += "\n$" + (i + 1) + " " + listapz[i] + "";
}
var keyb = new ReplyKeyboardMarkup()
{
Keyboard = arrays,
OneTimeKeyboard = true,
ResizeKeyboard = true
};
var reqAction = new SendMessage(update.Message.Chat.Id, selezione) { ReplyMarkup = keyb };
bot.MakeRequestAsync(reqAction).Wait();
Console.WriteLine(reqAction);
continue;
}
any solution?

You can create new one dimensional array for every line
Then
keyb.row(first_array) //you need get only values in python it will like keyb.row(*array)
keyb.row(second_array) //and so on
and add all keyboards in one reply_markup=keyb

Creating a grid like structure based on the area of an room

so in unity im creating randomly generating rooms. inside of these rooms i will "randomly" place objects, enemy,objects,items etc. based on nodes. nodes are transform objects that are separated from each other by 1 unit. the idea is that i can now pick a node and instantiate something at that node. The code works great when the room is 10x10(x,z since its a 3d game) i get a nice grid pattern it also works as expected when x is any multiple of 2. however when z changes from 10 it doesn't create the grid properly. there is also a problem if the room changes locations other then 0,0.
floor is a child object of the room.
void RoomSetup()
{
bool first = true;
int collCount = -1;
GameObject placeHolder = new GameObject("temp");
float colls;
float offX, offZ;
colls = floor.transform.localScale.x - 1;
print(colls);
for (int i = 0; i < ((floor.transform.localScale.x-1)
*(floor.transform.localScale.z-1)); i++)
{
//creating a for loop that stops when its greater then the area of the rectangle, subtract one from x,z so theres a one unit of padding from the walls.
offX = floor.transform.lossyPosition.x;
offZ = floor.transform.lossyPosition.z;
//getting the offset of the room in world space this is where i believe the issues arise
collCount++;
GameObject temp = new GameObject(i + " Node");
temp.transform.SetParent(floor.transform);
temp.AddComponent<BoxCollider>();
temp.GetComponent<BoxCollider>().isTrigger = true;
if(!first)
{
temp.transform.position = new Vector3((placeHolder.transform.position.x + 1), 6, placeHolder.transform.position.z);
placeHolder = temp;
if (collCount >= colls)
{
print("new line on " + temp.name + " coll " + collCount);
collCount = 0;
placeHolder.transform.position = new Vector3((-(floor.transform.localScale.x / 2) + 1)+offX, 6, (placeHolder.transform.position.z - 1)-offZ);
}
}
if (first)
{
// print(colls);
temp.transform.position = new Vector3((-(floor.transform.localScale.x / 2) + 1) + offX, 6, floor.transform.localScale.z - offZ);
placeHolder = temp;
first = false;
}
nodes.Add(temp);
}
}
Here are some pictures to help illustrate the issue
the first image is when the room is at 0,0 and it creates a nice grid pattern
when the room is offest it creates the grid still at 0,0

i figured it out, it happend to do with with the local and world scale/pos of the floor and the room
void RoomSetup()
{
bool first = true;
int collCount = -1;
GameObject placeHolder = new GameObject("temp");
float colls;
colls = floor.transform.localScale.x - 1;
offX = floor.transform.localScale.x;
offZ = floor.transform.localScale.z;
offX = (offX / 2) - offX + 1;
offZ = (offZ / 2) - 1;
offX = offX + floor.transform.position.x;
offZ = (offZ + floor.transform.position.z);
print(colls);
for (int i = 0; i < ((floor.transform.localScale.x-1) * (floor.transform.localScale.z-1)); i++)
{
collCount++;
//print(collCount);
GameObject temp = new GameObject(i + " Node");
temp.transform.SetParent(floor.transform);
temp.AddComponent<BoxCollider>();
temp.GetComponent<BoxCollider>().isTrigger = true;
if(!first)
{
temp.transform.position = new Vector3((placeHolder.transform.position.x + 1), 6, placeHolder.transform.position.z);
placeHolder = temp;
if (collCount >= colls)
{
print("new line on " + temp.name + " coll " + collCount);
collCount = 0;
temp.transform.position = new Vector3(floor.transform.localPosition.x + offX, 6, placeHolder.transform.position.z - 1);
placeHolder = temp;
}
}
if (first)
{
// print(colls);
temp.transform.position = new Vector3(floor.transform.localPosition.x+offX, 6, floor.transform.localPosition.z+offZ);
placeHolder = temp;
first = false;
}
nodes.Add(temp);
}
}
works as intended, creates a grid of nodes on the floor of anyroom square room

C# for skipping some

I am asking a question today because I look is skipping certain items and I think it is because its running too fast and doing too much, is there a way to fix this without manually putting a thread.sleep of like 10ms after each loop element?
Is this a known issue? any help would be appreciated! The for loop I am talking about is the 3rd one, the one after the two nested set of for's
There is about 104 items in squares after the first 2 foreach's are ran, there could be up to 1000, what is the best way to stop it skipping?
If I don't put a thread.sleep there, only the first occurence works, the rest of the items in the foreach DONT work
If I do 10ms, 3-4 miss
If I do 15ms they all work
List<string> squares = new List<string>();
var minX = 1;
var minY = 1;
var maxX = room.Model.MapSizeX;
var maxY = room.Model.MapSizeY;
for (var currentX = minX; currentX <= maxX; ++currentX)
{
for (var currentY = minY; currentY <= maxY; ++currentY)
{
if (!room.GetGameMap().ItemCanBePlacedHere(currentX, currentY))
{
continue;
}
squares.Add(currentX + "," + currentY);
}
}
foreach (string tileString in squares)
{
var x = Convert.ToInt32(tileString.Split(',')[0]);
var y = Convert.ToInt32(tileString.Split(',')[1]);
session.SendWhisper("Attempting to place an item in X" + x + " and Y" + y);
if (!room.GetGameMap().ItemCanBePlacedHere(x, y))
{
session.SendWhisper("Can't place an item in X" + x + " Y" + y);
continue;
}
var newItem = new Item(new Random().Next(), room.RoomId, 1536, "", x, y, 0, 0, session.GetPlayerData().Id, 0, 0, 0, "", room);
newItem.ExtraData = "1";
newItem.UpdateState();
room.SendMessage(new ObjectAddComposer(newItem, room));
room.GetGameMap().AddToMap(newItem);
// I only put this here because it skips
// This slows it down a little and doesnt
// Make it skip 3-5 of the items
System.Threading.Thread.Sleep(15);
}

Dealing with imprecise, jittery gps signal

My goal is to use GPS to measure the distance that I moved with my phone. My problem is, that the results are imprecise. I've used the following code to calculate the distance:
public double getDistance(GeoCoordinate p1, GeoCoordinate p2)
{
double d = p1.Latitude * 0.017453292519943295;
double num3 = p1.Longitude * 0.017453292519943295;
double num4 = p2.Latitude * 0.017453292519943295;
double num5 = p2.Longitude * 0.017453292519943295;
double num6 = num5 - num3;
double num7 = num4 - d;
double num8 = Math.Pow(Math.Sin(num7 / 2.0), 2.0) + ((Math.Cos(d) * Math.Cos(num4)) * Math.Pow(Math.Sin(num6 / 2.0), 2.0));
double num9 = 2.0 * Math.Atan2(Math.Sqrt(num8), Math.Sqrt(1.0 - num8));
return (6376500.0 * num9);
}
This is my OnLocationChanged implementation:
bool begin = true;
public void OnLocationChanged(Location location)
{
_aktuellerOrt = location;
//aktuellerOrt.Speed is always 0, so I cannot use that.
if (_aktuellerOrt == null)
{
//message
}
else
{
if (_aktuellerOrt.Accuracy > 70) //I found values around 130 to be more or less good
{
_locationText.Text = String.Format("{0}, {1}", _aktuellerOrt.Latitude, _aktuellerOrt.Longitude);
GeoJetzt = new GeoCoordinate();
GeoJetzt.Latitude = _aktuellerOrt.Latitude;
GeoJetzt.Longitude = _aktuellerOrt.Longitude;
if (beginn)
{
GeoVorher = new GeoCoordinate();
GeoVorher.Latitude = _aktuellerOrt.Latitude;
GeoVorher.Longitude = _aktuellerOrt.Longitude;
beginn = false;
}
else
{
double abstand = getDistance(GeoVorher, GeoJetzt);
weg += abstand;
if (weg >= 1)
_distanzText.Text = weg + " kilometers";
else
_distanzText.Text = (weg * 1000) + " meters";
_distanzText.Text += " (" + abstand + ", " + _aktuellerOrt.Accuracy + ")";
GeoVorher = new GeoCoordinate();
GeoVorher.Latitude = _aktuellerOrt.Latitude;
GeoVorher.Longitude = _aktuellerOrt.Longitude;
}
}
else
_locationText.Text = "Too coarse, now " + _aktuellerOrt.Accuracy + ".";
}
}
The problem is, I get values for abstand within the kilometer range while not moving the phone.
What are best practices for imprecise signals? My goal is to measure the distance while jogging or running, so 10 - 16 km/h.