extracommands/extracommands/MoveBlocksCommandEngine.cs

using System;
using System.Collections.Generic;
using RobocraftX.Multiplayer;
using RobocraftX.Common;
using RobocraftX.Blocks;
using Svelto.ECS;
using Svelto.ECS.EntityStructs;
using Unity.Entities;
using Svelto.Context;
using Svelto.Tasks;
using RobocraftX;
using RobocraftX.SimulationModeState;
using RobocraftX.UECS;
using Unity.Transforms;
using Unity.Mathematics;

namespace ExtraCommands.Building
{
    [CustomCommand("MoveBlocks", "Move all blocks (including ground) from their original position")]
    [CustomCommand("MoveLastBlock", "Move last block from original position")]
    class MoveBlocksCommandEngine : CustomCommandEngine
    {
        public MoveBlocksCommandEngine(UnityContext<FullGameCompositionRoot> ctxHolder, EnginesRoot enginesRoot, World physW, Action reloadGame, MultiplayerInitParameters mpParams) : base(ctxHolder, enginesRoot, physW, reloadGame, mpParams)
        {
        }

        public override void Ready()
        {
            CustomCommandUtility.Register<float, float, float>("MoveBlocks", MoveBlocksCommand, "Move all blocks (including ground) from their original position");
            CustomCommandUtility.Register<float, float, float>("MoveLastBlock", MoveLastBlockCommand, "Move last block from original position");
        }

        // Move every block by vector (x,y,z)
        private void MoveBlocksCommand(float x, float y, float z)
        {
            ref SimulationModeStateEntityStruct simMode = ref this.entitiesDB.QueryUniqueEntity<SimulationModeStateEntityStruct>(SimulationModeStateExclusiveGroups.GAME_STATE_GROUP);
            if (simMode.simulationMode != SimulationMode.Build)
            {
                uREPL.Log.Error("Blocks can only be moved in Build Mode");
                return;
            }
            uint count = this.entitiesDB.Count<PositionEntityStruct>(CommonExclusiveGroups.OWNED_BLOCKS_GROUP);
            float3 translationVector = new float3(x,y,z);
            for (uint i = 0; i < count; i++)
            {
                TranslateSingleBlock(i, translationVector);
            }
            uREPL.Log.Output($"Moved {count} blocks");
        }

        // Move block with highest index by vector (x,y,z)
        private void MoveLastBlockCommand(float x, float y, float z)
        {
            uint count = entitiesDB.Count<PositionEntityStruct>(CommonExclusiveGroups.OWNED_BLOCKS_GROUP);
            ref SimulationModeStateEntityStruct simMode = ref this.entitiesDB.QueryUniqueEntity<SimulationModeStateEntityStruct>(SimulationModeStateExclusiveGroups.GAME_STATE_GROUP);
            if (simMode.simulationMode != SimulationMode.Build)
            {
                uREPL.Log.Error("Blocks can only be moved in Build Mode");
                return;
            }
            float3 newPos = TranslateConnectedBlocks(count-1, new float3(x,y,z));            
            uREPL.Log.Output($"Moved block to ({newPos.x},{newPos.y},{newPos.z})");
        }

        // Move the block denoted by blockID by translationVector (old_position += translationVector)
        private float3 TranslateSingleBlock(uint blockID, float3 translationVector)
        {
            ref PositionEntityStruct posStruct = ref this.entitiesDB.QueryEntity<PositionEntityStruct>(blockID, CommonExclusiveGroups.OWNED_BLOCKS_GROUP);
            ref GridRotationStruct gridStruct = ref this.entitiesDB.QueryEntity<GridRotationStruct>(blockID, CommonExclusiveGroups.OWNED_BLOCKS_GROUP);
            ref LocalTransformEntityStruct transStruct = ref this.entitiesDB.QueryEntity<LocalTransformEntityStruct>(blockID, CommonExclusiveGroups.OWNED_BLOCKS_GROUP);
            ref UECSPhysicsEntityStruct phyStruct = ref this.entitiesDB.QueryEntity<UECSPhysicsEntityStruct>(blockID, CommonExclusiveGroups.OWNED_BLOCKS_GROUP);
            // main (persistent) position
            posStruct.position.x += translationVector.x;
            posStruct.position.y += translationVector.y;
            posStruct.position.z += translationVector.z;
            // placement grid  position
            gridStruct.position.x += translationVector.x;
            gridStruct.position.y += translationVector.y;
            gridStruct.position.z += translationVector.z;
            // rendered position
            transStruct.position.x += translationVector.x;
            transStruct.position.y += translationVector.y;
            transStruct.position.z += translationVector.z;
            // collision position
            this.physWorld.EntityManager.SetComponentData(phyStruct.uecsEntity, new Translation
            {
                Value = posStruct.position
            });
            return posStruct.position;
        }

        private float3 TranslateConnectedBlocks(uint blockID, float3 translationVector)
        {
            //float3 newPosition = TranslateSingleBlock(blockID, translationVector);
            HashSet<uint> processedCubes = new HashSet<uint>();
            Stack<uint> cubeStack = new Stack<uint>();
            cubeStack.Push(blockID);
            uint count;
            GridConnectionsEntityStruct blockConnections;
            MachineGraphConnectionEntityStruct[] connections;

            while (cubeStack.Count > 0) // find all inter-connected blocks
            {
                uint connectedBlockID = cubeStack.Pop();
                processedCubes.Add(connectedBlockID);
                ScalingEntityStruct scale = entitiesDB.QueryEntity<ScalingEntityStruct>(connectedBlockID, CommonExclusiveGroups.OWNED_BLOCKS_GROUP);
                //uREPL.Log.Output($"Catching {connectedBlockID} with scale {scale.scale}");
                blockConnections = entitiesDB.QueryEntity<GridConnectionsEntityStruct>(connectedBlockID, CommonExclusiveGroups.OWNED_BLOCKS_GROUP);
                connections = entitiesDB.QueryEntities<MachineGraphConnectionEntityStruct>(blockConnections.connectionGroup, out count);

                foreach (MachineGraphConnectionEntityStruct conn in connections)
                {
                    if (!processedCubes.Contains(conn.connectedBlock.entityID) 
                        && blockConnections.isConnectionGroupAssigned 
                        && (conn.oppositeConnectionEgid.entityID != 0u 
                         || conn.oppositeConnectionEgid.entityID != conn.connectedBlock.entityID))
                    {
                        //uREPL.Log.Output($"Block {connectedBlockID} connects to {conn.connectedBlock.entityID} (opposite {conn.oppositeConnectionEgid.entityID})");
                        cubeStack.Push(conn.connectedBlock.entityID);
                    }
                }
            }
            foreach (uint id in processedCubes)
            {
                TranslateSingleBlock(id, translationVector);
            }
            //uREPL.Log.Output($"Found {processedCubes.Count} connected blocks");
            return this.entitiesDB.QueryEntity<PositionEntityStruct>(blockID, CommonExclusiveGroups.OWNED_BLOCKS_GROUP).position;
        }

        public override void Dispose()
        {
            CustomCommandUtility.Unregister("MoveBlocks");
            CustomCommandUtility.Unregister("MoveLastBlock");
        }
    }
}