AutoAsparagus.ASPFuelLine.makeFuelLineChain C# (CSharp) Method

        private static Part makeFuelLineChain(List<Part> tanksToConnect, Part startTank, AvailablePart ap, int textureNum, string texturePath, string textureDisplayName, int numberOfTanks)
        {
            Part currentTank = startTank;
            tanksToConnect.Remove (startTank);
            ASPConsoleStuff.printPart ("=== makeFuelLineChain, starting at", currentTank);
            if (currentTank == null) {
                ASPConsoleStuff.print ("makeFuelLineChain passed a null part!");
                return null;
            }

            // connect first part to parent fuel tank
            Part parentTank = findParentFuelTank (currentTank);
            if (parentTank == null) {
                ASPConsoleStuff.printPart ("no parent fuel tank found found!  Not connecting", currentTank);
            } else {
                if (!AttachFuelLine (currentTank, parentTank, ap, textureNum, texturePath, textureDisplayName)) {
                    tanksToConnect = new List<Part> ();
                    return null;
                }
            }

            // Decide on fuel line chain length (not including fuel line to parent fuel tank we just did)
            // 10-way symmetry will have (10-2)/2 = 4 for each side
            // 8-way symmetry will have (8-2)/2 = 3 for each side
            // 6-way symmetry will have (6-2)/2 = 2 for each side
            // 4-way symmetry will have (4-2)/2 = 1 for each side
            // 2-way symmetry will have (2-2)/2 = 0 for each side (we will just connect the tanks to the central tank)

            int tanksToDropAtOnce = 2;

            int[] primes = new int[] {
                17,
                13,
                11,
                7,
                5,
                3,
                2,
            };

            foreach (int prime in primes) {
                ASPConsoleStuff.AAprint ("Testing prime " + prime.ToString ());
                if ((numberOfTanks % prime) == 0) {
                    tanksToDropAtOnce = prime;
                }
            }

            int chainLength = (numberOfTanks / tanksToDropAtOnce - 1);

            ASPConsoleStuff.AAprint ("Fuel line chain length: " + chainLength.ToString () + ", dropping " + tanksToDropAtOnce.ToString () + " tanks at once (from " + numberOfTanks.ToString () + " tanks)");

            // Now connect chainLength number of tanks to the first part
            int currentChainLength = chainLength;
            Part lastTank = currentTank;
            Part nextTank = null;
            int safetyfactor = 10000;
            while (currentChainLength > 0) {
                safetyfactor = safetyfactor - 1;
                if (safetyfactor == 0) {
                    AutoAsparagus.osd ("Infinite loop in makeFuelLineChain, aborting :(");
                    AutoAsparagus.mystate = AutoAsparagus.ASPState.ERROR;
                    return null;
                }

                ASPConsoleStuff.printPart ("connecting chain link #" + currentChainLength.ToString (), currentTank);
                nextTank = nearestNeighborWithoutFuelLine (currentTank, ap.name, tanksToConnect);
                if (nextTank == null) {
                    ASPConsoleStuff.printPart ("no nearestNeighborWithoutFuelLine found!  Not connecting", currentTank);
                } else {
                    // we're working backwards, away from central tank, so we connect the new tank to the existing one
                    if (!AttachFuelLine (nextTank, currentTank, ap, textureNum, texturePath, textureDisplayName)) {
                        tanksToConnect = new List<Part> ();
                        return null;
                    }
                    lastTank = nextTank;
                    currentTank = nextTank;
                    tanksToConnect.Remove (currentTank);
                }
                currentChainLength = currentChainLength - 1;
            }
            // return the tank for the next chain
            ASPConsoleStuff.printPart ("lastTank=", lastTank);
            nextTank = nearestNeighborWithoutFuelLine (lastTank, ap.name, tanksToConnect);
            ASPConsoleStuff.printPart ("Should start next chain with", nextTank);
            return nextTank;
        }