整理一下
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227
Source/WulaFallenEmpire/Projectiles/Projectile_TrackingBullet.cs
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227
Source/WulaFallenEmpire/Projectiles/Projectile_TrackingBullet.cs
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using System.Collections.Generic;
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using System.Reflection;
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using RimWorld;
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using UnityEngine;
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using Verse;
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using Verse.AI;
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using Verse.Sound;
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namespace WulaFallenEmpire
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{
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public class Projectile_TrackingBullet : Bullet
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{
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private TrackingBulletDef trackingDefInt;
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protected Vector3 exactPositionInt;
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public Vector3 curSpeed;
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public bool homing = true;
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private int destroyTicksAfterLosingTrack = -1; // 失去追踪后多少tick自毁，-1表示不自毁
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private int Fleck_MakeFleckTick; // 拖尾特效的计时器
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private Vector3 lastTickPosition; // 记录上一帧的位置，用于计算移动方向
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private static class NonPublicFields
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{
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public static FieldInfo Projectile_AmbientSustainer = typeof(Projectile).GetField("ambientSustainer", BindingFlags.Instance | BindingFlags.NonPublic);
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public static FieldInfo ThingWithComps_comps = typeof(ThingWithComps).GetField("comps", BindingFlags.Instance | BindingFlags.NonPublic);
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public static MethodInfo ProjectileCheckForFreeInterceptBetween = typeof(Projectile).GetMethod("CheckForFreeInterceptBetween", BindingFlags.Instance | BindingFlags.NonPublic);
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}
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public TrackingBulletDef TrackingDef
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{
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get
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{
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if (trackingDefInt == null)
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{
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trackingDefInt = def.GetModExtension<TrackingBulletDef>();
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if (trackingDefInt == null)
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{
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Log.ErrorOnce($"TrackingBulletDef for {this.def.defName} is null. Creating a default instance.", this.thingIDNumber ^ 0x12345678);
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this.trackingDefInt = new TrackingBulletDef();
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}
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}
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return trackingDefInt;
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}
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}
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public override Vector3 ExactPosition => exactPositionInt;
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public override Quaternion ExactRotation => Quaternion.LookRotation(curSpeed);
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public override void Launch(Thing launcher, Vector3 origin, LocalTargetInfo usedTarget, LocalTargetInfo intendedTarget, ProjectileHitFlags hitFlags, bool preventFriendlyFire = false, Thing equipment = null, ThingDef targetCoverDef = null)
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{
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base.Launch(launcher, origin, usedTarget, intendedTarget, hitFlags, preventFriendlyFire, equipment, targetCoverDef);
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exactPositionInt = origin.Yto0() + Vector3.up * def.Altitude;
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// 初始化子弹速度，指向目标，并考虑初始旋转角度
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Vector3 initialDirection = (destination - origin).Yto0().normalized;
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float degrees = Rand.Range(0f - TrackingDef.initRotateAngle, TrackingDef.initRotateAngle);
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Vector2 v = new Vector2(initialDirection.x, initialDirection.z);
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v = v.RotatedBy(degrees);
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Vector3 rotatedDirection = new Vector3(v.x, 0f, v.y);
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curSpeed = rotatedDirection * def.projectile.SpeedTilesPerTick;
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ReflectInit();
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lastTickPosition = origin; // 初始化 lastTickPosition
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}
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protected void ReflectInit()
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{
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// 确保私有字段的访问
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if (!def.projectile.soundAmbient.NullOrUndefined())
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{
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// This line might cause issues if ambientSustainer is not directly settable or if Projectile type changes.
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// For simplicity, we might omit it for now or find a safer way.
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// ambientSustainer = (Sustainer)NonPublicFields.Projectile_AmbientSustainer.GetValue(this);
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}
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// comps = (List<ThingComp>)NonPublicFields.ThingWithComps_comps.GetValue(this); // 如果需要CompTick，需要这个
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}
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public virtual void MovementTick()
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{
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Vector3 vect = ExactPosition + curSpeed;
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ShootLine shootLine = new ShootLine(ExactPosition.ToIntVec3(), vect.ToIntVec3());
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Vector3 vectorToTarget = (intendedTarget.Cell.ToVector3() - ExactPosition).Yto0();
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if (homing)
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{
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// 如果目标消失或距离太远，停止追踪
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if (!intendedTarget.IsValid || !intendedTarget.Thing.Spawned || (intendedTarget.Cell.ToVector3() - ExactPosition).magnitude > def.projectile.speed * 2f) // 假设2倍速度为最大追踪距离
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{
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homing = false;
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destroyTicksAfterLosingTrack = TrackingDef.destroyTicksAfterLosingTrack.RandomInRange; // 失去追踪后根据XML配置的范围自毁
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}
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else
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{
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// 计算需要转向的方向
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Vector3 desiredDirection = vectorToTarget.normalized;
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Vector3 currentDirection = curSpeed.normalized;
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// 计算方向差异
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Vector3 directionDifference = desiredDirection - currentDirection;
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// 如果方向差异过大，可能失去追踪，或者直接转向
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if (directionDifference.sqrMagnitude > 0.001f) // 避免浮点数精度问题
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{
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// 调整当前速度，使其更接近目标方向
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curSpeed += directionDifference * TrackingDef.homingSpeed * curSpeed.magnitude;
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curSpeed = curSpeed.normalized * def.projectile.SpeedTilesPerTick; // 保持速度恒定
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}
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}
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}
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exactPositionInt = ExactPosition + curSpeed; // 更新位置
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}
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public override void ExposeData()
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{
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base.ExposeData();
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Scribe_Values.Look(ref exactPositionInt, "exactPosition");
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Scribe_Values.Look(ref curSpeed, "curSpeed");
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Scribe_Values.Look(ref homing, "homing", defaultValue: true);
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Scribe_Values.Look(ref destroyTicksAfterLosingTrack, "destroyTicksAfterLosingTrack", -1);
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if (Scribe.mode == LoadSaveMode.PostLoadInit)
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{
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ReflectInit();
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if (this.trackingDefInt == null)
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{
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this.trackingDefInt = this.def.GetModExtension<TrackingBulletDef>();
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if (this.trackingDefInt == null)
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{
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Log.ErrorOnce($"TrackingBulletDef is null for projectile {this.def.defName} after PostLoadInit. Creating a default instance.", this.thingIDNumber ^ 0x12345678);
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this.trackingDefInt = new TrackingBulletDef();
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}
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}
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}
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}
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protected override void Tick()
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{
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base.Tick(); // 调用父类Bullet的Tick，处理 ticksToImpact 减少和最终命中
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if (destroyTicksAfterLosingTrack > 0)
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{
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destroyTicksAfterLosingTrack--;
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if (destroyTicksAfterLosingTrack <= 0)
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{
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Destroy(); // 如果自毁计时器归零，直接销毁
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return;
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}
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}
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// 处理拖尾特效
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if (TrackingDef != null && TrackingDef.tailFleckDef != null)
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{
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Fleck_MakeFleckTick++;
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// 只有当达到延迟时间后才开始生成Fleck
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if (Fleck_MakeFleckTick >= TrackingDef.fleckDelayTicks)
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{
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if (Fleck_MakeFleckTick >= (TrackingDef.fleckDelayTicks + TrackingDef.fleckMakeFleckTickMax))
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{
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Fleck_MakeFleckTick = TrackingDef.fleckDelayTicks; // 重置计时器，从延迟时间开始循环
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}
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Map map = base.Map;
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int randomInRange = TrackingDef.fleckMakeFleckNum.RandomInRange;
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Vector3 currentPosition = ExactPosition;
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Vector3 previousPosition = lastTickPosition;
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for (int i = 0; i < randomInRange; i++)
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{
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float num = (currentPosition - previousPosition).AngleFlat();
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float velocityAngle = TrackingDef.fleckAngle.RandomInRange + num;
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float randomInRange2 = TrackingDef.fleckScale.RandomInRange;
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float randomInRange3 = TrackingDef.fleckSpeed.RandomInRange;
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FleckCreationData dataStatic = FleckMaker.GetDataStatic(currentPosition, map, TrackingDef.tailFleckDef, randomInRange2);
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dataStatic.rotation = (currentPosition - previousPosition).AngleFlat();
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dataStatic.rotationRate = TrackingDef.fleckRotation.RandomInRange;
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dataStatic.velocityAngle = velocityAngle;
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dataStatic.velocitySpeed = randomInRange3;
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map.flecks.CreateFleck(dataStatic);
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}
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}
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}
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lastTickPosition = ExactPosition; // 更新上一帧位置
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// 保存移动前的精确位置
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Vector3 exactPositionBeforeMove = exactPositionInt;
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MovementTick(); // 调用追踪移动逻辑，更新 exactPositionInt (即新的 ExactPosition)
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// 检查是否超出地图边界
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if (!ExactPosition.InBounds(base.Map))
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{
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// 如果超出地图，直接销毁，不触发 ImpactSomething()
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Destroy();
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return;
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}
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// 在调用 ProjectileCheckForFreeInterceptBetween 之前，添加近距离命中检测
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if (intendedTarget != null && intendedTarget.Thing != null && intendedTarget.Thing.Spawned)
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{
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float distanceToTarget = (ExactPosition - intendedTarget.Thing.DrawPos).magnitude;
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if (distanceToTarget <= TrackingDef.impactThreshold)
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{
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Impact(intendedTarget.Thing); // 强制命中目标
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return; // 命中后立即返回，不再执行后续逻辑
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}
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}
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// 检查是否有东西在路径上拦截
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// ProjectileCheckForFreeInterceptBetween 会在内部处理命中，并调用 ImpactSomething()
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// 所以这里不需要额外的 ImpactSomething() 调用
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object[] parameters = new object[2] { exactPositionBeforeMove, exactPositionInt }; // 传入移动前和移动后的位置
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// 调用 ProjectileCheckForFreeInterceptBetween
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// 如果它返回 true，说明有拦截，并且拦截逻辑已在内部处理。
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// 如果返回 false，说明没有拦截，子弹继续飞行。
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NonPublicFields.ProjectileCheckForFreeInterceptBetween.Invoke(this, parameters);
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}
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protected override void Impact(Thing hitThing, bool blockedByShield = false)
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{
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// 默认Impact逻辑，可以根据需要扩展
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base.Impact(hitThing, blockedByShield);
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}
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}
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}
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