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ER3D_TrafficSystem.cs
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ER3D_TrafficSystem.cs
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using Unity.Burst;
using Unity.Collections;
using Unity.Entities;
using Unity.Jobs;
using Unity.Mathematics;
using Unity.Transforms;
using UnityEngine;
public class ER3D_TrafficSystem : SystemBase
{
private NativeArray<Entity> roadEntities;
private NativeArray<Entity> connectionEntities;
protected override void OnStartRunning()
{
EntityQuery allRoadsQuery = GetEntityQuery(
typeof(ERRoadTag),
ComponentType.ReadOnly<RoadDetails>(),
ComponentType.ReadOnly<LanePoints>());
roadEntities = allRoadsQuery.ToEntityArray(Allocator.Persistent);
EntityQuery allConnectionsQuery = GetEntityQuery(
typeof(ERConnectionTag),
ComponentType.ReadOnly<ConnectionDetails>(),
ComponentType.ReadOnly<LanePoints>());
connectionEntities = allConnectionsQuery.ToEntityArray(Allocator.Persistent);
}
[BurstCompile]
protected override void OnUpdate()
{
System.Random random = new System.Random();
uint randomSeed = (uint)random.Next(88, 1000000);
float dt = Time.DeltaTime;
float reachedPositionDistance = 2.5f;
NativeArray<Entity> roads = roadEntities;
NativeArray<Entity> connections = connectionEntities;
ComponentDataFromEntity<RoadDetails> RoadDetailsFromEntity = GetComponentDataFromEntity<RoadDetails>(true);
ComponentDataFromEntity<ConnectionDetails> ConnectionDetailsFromEntity = GetComponentDataFromEntity<ConnectionDetails>(true);
BufferFromEntity<LanePoints> LanePointsFromEntity = GetBufferFromEntity<LanePoints>(true);
Entities.WithAll<ERAutoTag>()
.ForEach((
DynamicBuffer<AutoLanePoints> autoLanePoints,
ref AutoDetails autoDetails,
ref AutoPosition autoPosition,
ref Translation translation,
ref Rotation rotation) =>
{
var distance = math.distance(autoPosition.Destination, translation.Value);
if (distance <= reachedPositionDistance)
{
autoPosition.CurrentPositionIndex += 1;
if (autoPosition.CurrentPositionIndex >= autoLanePoints.Length)
{
autoPosition.CurrentPositionIndex = 0;
autoLanePoints.Clear();
int laneIndex = 0;
int roadIdentity = 0;
int connectionIdentityEnd = 0;
for (int i = 0; i < roads.Length; i++)
{
RoadDetails roadDetails = RoadDetailsFromEntity[roads[i]];
if ((roadDetails.RoadIdentity == autoPosition.RoadIdentity) &&
(roadDetails.LaneIndex == autoPosition.LaneIndex) &&
(roadDetails.ConnectionIdentityStart == autoPosition.ConnectionIdentity) &&
(roadDetails.ConnectionIndexStart == autoPosition.ConnectionIndex)
)
{
laneIndex = roadDetails.LaneIndex;
roadIdentity = roadDetails.RoadIdentity;
connectionIdentityEnd = roadDetails.ConnectionIdentityEnd;
var roadLanePointsBuffer = LanePointsFromEntity[roads[i]];
var roadLanePoints = roadLanePointsBuffer.ToNativeArray(Allocator.Temp);
var lanePointAuto = new AutoLanePoints();
for (int pointIndex = 0; pointIndex < roadLanePoints.Length; pointIndex++)
{
lanePointAuto.value = roadLanePoints[pointIndex].value;
autoLanePoints.Add(lanePointAuto);
}
break;
}
}
//Get the Connection's Lane's points
//First find all options that have the same Idenity and Index.
//Then we can randomly select one of the routes through the connection
NativeList<Entity> availableConnections = new NativeList<Entity>(Allocator.Temp);
for (int i = 0; i < connections.Length; i++)
{
var connectionDetails = ConnectionDetailsFromEntity[connections[i]];
if ((connectionDetails.ConnectionIdentity == connectionIdentityEnd) &&
(connectionDetails.LaneIndexStart == laneIndex) &&
(connectionDetails.RoadIdentityStart == roadIdentity) &&
(connectionDetails.ConnectionIndexStart == autoPosition.ConnectionIndex))
{
availableConnections.Add(connections[i]);
}
}
Unity.Mathematics.Random mathRandom = new Unity.Mathematics.Random(randomSeed);
int randomValue = mathRandom.NextInt(0, availableConnections.Length);
var connectionDetailsNew = ConnectionDetailsFromEntity[availableConnections[randomValue]];
var connectionLanePointsBuffer = LanePointsFromEntity[availableConnections[randomValue]];
var connectionLanePoints = connectionLanePointsBuffer.ToNativeArray(Allocator.Temp);
var lanePoint = new AutoLanePoints();
for (int x = 0; x < connectionLanePoints.Length; x++)
{
lanePoint.value = connectionLanePoints[x].value;
autoLanePoints.Add(lanePoint);
}
//Reset the Auto's variables for the next Road/Connection selection
autoPosition.LaneIndex = connectionDetailsNew.LaneIndexEnd;
autoPosition.RoadIdentity = connectionDetailsNew.RoadIdentityEnd;
autoPosition.ConnectionIdentity = connectionDetailsNew.ConnectionIdentity;
autoPosition.ConnectionIndex = connectionDetailsNew.ConnectionIndexEnd;
availableConnections.Dispose();
}
autoPosition.Destination = autoLanePoints[autoPosition.CurrentPositionIndex].value;
autoPosition.Destination.y += autoDetails.yOffset;
}
float3 lookVector = autoPosition.Destination - translation.Value;
if (!lookVector.Equals(float3.zero))
{
Quaternion rotationLookAt = Quaternion.LookRotation(lookVector);
rotation.Value = rotationLookAt;
}
float3 smoothedPosition = math.lerp(translation.Value, autoPosition.Destination, autoDetails.speed * dt);
translation.Value = smoothedPosition;
}).Schedule();
}
}