Generate random numbers with different seeds in each branch of a DataTree

Grasshopper
,
1

I need help to generate a unique random sine translation for every branch of my grasshopper DataTree. I have scripted this C# code but each branch is a repetition. Can anyone help?

// Initialize the output DataTree
DataTree/span>double> R = new DataTree/span>double>();

for (int branchNo = 0; branchNo /span> Values.BranchCount; branchNo++)
{
    // Create a unique seed for each branch using the branch number
    Random random = new Random(branchNo * DateTime.Now.Microsecond);
    // Generate random values for each item
    double a = (random.NextDouble() * 2 - 1);  // Random double between -1 and 1
    double d = random.NextDouble();            // Random double between 0 and 1
    double b = random.NextDouble();            // Random double between 0 and 1
    double c = (random.NextDouble() * 2 - 1);  // Random double between -1 and 1

    // Loop through each item in the branch
    foreach (var item in Values.Branch(branchNo))
    {
       
        // Calculate V using the formula
        double V = a * Math.Sin(b * item + c) + d;

        // Create path for DataTree insertion
        GH_Path path = new GH_Path(branchNo);

        // Check if value already exists in R
        bool exists = R.AllData().Contains(V);

        // If value does not exist, add it to the DataTree
        if (!exists)
        {
            R.Add(item, path);
        }
    }
}

// Output the result
Results = R;
2

I can barely read C# :upside_down_face: but I guess you are creating V, then checking if V is already present, and at the end instead of inserting that V you insert “item” ?

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3 
// Initialize the output DataTree
DataTree<double> R = new DataTree<double>();

// Used to provide more randomness
Random timeRandomizer = new Random();
int timeSeedModifier = timeRandomizer.Next(1000, 10000);

for (int branchNo = 0; branchNo < Values.BranchCount; branchNo++)
{
    // Create a unique seed for each branch using the branch number and a time component
    Random random = new Random(branchNo * timeSeedModifier + (int)DateTime.Now.Ticks);

    // Generate random values for each item
    double a = (random.NextDouble() * 2 - 1);  // Random double between -1 and 1
    double d = random.NextDouble();            // Random double between 0 and 1
    double b = random.NextDouble();            // Random double between 0 and 1
    double c = (random.NextDouble() * 2 - 1);  // Random double between -1 and 1

    // Create path for DataTree insertion
    GH_Path path = new GH_Path(branchNo);

    // Loop through each item in the branch
    foreach (var item in Values.Branch(branchNo))
    {
        // Calculate V using the formula
        double V = a * Math.Sin(b * item + c) + d;

        // Add value to the DataTree
        R.Add(V, path); // Assuming you want to store the transformed value
    }
}

// Output the result
Results = R;

:

  • Random Seed: Combined a stable timeSeedModifier with branch index multipliers to ensure unique seeds across branches.
  • Value to DataTree: Directly add the transformed value VV to the DataTree.
  • Avoid AllData Check: Removed the check for existing values within the entire DataTree to improve performance and because each transformation is inherently probabilistically unique.!