Implement the rtp function

#2

AriasServerUtils/RTPFactory.cs

@@ -0,0 +1,71 @@
+using System;
+using System.Data;
+using System.Numerics;
+using AriasServerUtils;
+using Vintagestory.API.Common;
+using Vintagestory.API.Common.Entities;
+using Vintagestory.API.MathTools;
+using Vintagestory.API.Server;
+using Vintagestory.GameContent;
+
+public class RTPFactory
+{
+    /// <summary>
+    /// This function searches for a safe position, honoring the max RTP distance in the global configuration
+    /// </summary>
+    /// <param name="isp">The player to be teleported</param>
+    /// <returns>A random position +/- max distance from current position.</returns>
+    public static PlayerPosition GetRandomPosition(IServerPlayer isp)
+    {
+        Random rng = new Random();
+        EntityPos vPos = isp.Entity.Pos;
+        BlockPos bPos = new BlockPos(isp.Entity.Pos.Dimension);
+        IServerWorldAccessor iswa = isp.Entity.World as IServerWorldAccessor;
+
+        int tries = 5;
+        PlayerPosition PPos = PlayerPosition.from(isp.Entity);
+
+        while (tries-- > 0)
+        {
+            // Generate random X and Z within max RTP distance
+            bPos.X = (int)vPos.X + rng.Next(-ServerUtilities.config.MaxRTPBlockDistance, ServerUtilities.config.MaxRTPBlockDistance);
+            bPos.Z = (int)vPos.Z + rng.Next(-ServerUtilities.config.MaxRTPBlockDistance, ServerUtilities.config.MaxRTPBlockDistance);
+            bPos.Y = 255;
+
+            Block lastAboveLast = null;
+            Block lastBlock = null;
+            Block curBlock;
+
+            // Scan downwards to find a valid landing spot
+            for (int i = 255; i > 50; i--)
+            {
+                bPos.Y = i;
+                curBlock = iswa.BlockAccessor.GetBlock(bPos);
+
+                if (curBlock != null && !curBlock.IsLiquid() && curBlock.MatterState == EnumMatterState.Solid)
+                {
+                    if (lastBlock != null && lastBlock.MatterState == EnumMatterState.Gas &&
+                        lastAboveLast != null && lastAboveLast.MatterState == EnumMatterState.Gas)
+                    {
+                        // Found a valid spot: curBlock is solid, lastBlock & lastAboveLast are gas (air)
+                        PPos.X = bPos.X;
+                        PPos.Y = bPos.Y + 1;
+                        PPos.Z = bPos.Z;
+
+                        return PPos;
+                    }
+                }
+
+                lastAboveLast = lastBlock;
+                lastBlock = curBlock;
+            }
+        }
+
+        return null; // Return null if no valid position is found after retries
+    }
+    public static float GetDistance(Vec2i pos1, Vec2i pos2)
+    {
+        return MathF.Sqrt(MathF.Pow(pos2.X - pos1.X, 2) + MathF.Pow(pos2.Y - pos1.Y, 2));
+    }
+
+}