/// <summary>
/// Gets Prediction result while unit is immobile
/// </summary>
/// <param name="target">Target for spell</param>
/// <param name="width">Spell width</param>
/// <param name="delay">Spell delay</param>
/// <param name="missileSpeed">Spell missile speed</param>
/// <param name="range">Spell range</param>
/// <param name="collisionable">Spell collisionable</param>
/// <param name="type">Spell skillshot type</param>
/// <param name="from">Spell casted position</param>
/// <returns></returns>
public static PredictionResult GetImmobilePrediction(AIBaseClient target, float width, float delay, float missileSpeed, float range, bool collisionable, SpellType type, Vector2 from, Vector2 rangeCheckFrom)
{
var result = new PredictionResult
{
Input = new PredictionInput(target, delay, missileSpeed, width, range, collisionable, type, from.ToVector3World(), rangeCheckFrom.ToVector3World()),
Unit = target,
CastPosition = target.PreviousPosition.ToVector2()
};
result.UnitPosition = result.CastPosition;
//calculate spell arrival time
var t = delay + Game.Ping / 2000f;
if (missileSpeed != 0)
{
t += from.Distance(target.PreviousPosition) / missileSpeed;
}
if (type == SpellType.Circle)
{
t += width / target.MoveSpeed / 2f;
}
if (t >= target.LeftImmobileTime())
{
result.HitChance = HitChance.Immobile;
result.Lock();
return(result);
}
if (target is AIHeroClient hero)
{
result.HitChance = PredictionExtensions.GetHitChance(t - hero.LeftImmobileTime(), hero.AvgMovChangeTime(), 0, 0, 0);
}
else
{
result.HitChance = HitChance.High;
}
result.Lock();
return(result);
}
/// <summary>
/// Calculates cast position with target's path
/// </summary>
/// <param name="target">Target for spell</param>
/// <param name="width">Spell width</param>
/// <param name="delay">Spell delay</param>
/// <param name="missileSpeed">Spell missile speed</param>
/// <param name="range">Spell range</param>
/// <param name="collisionable">Spell collisionable</param>
/// <param name="type">Spell skillshot type</param>
/// <param name="path">Waypoints of target</param>
/// <param name="avgt">Average reaction time (in ms)</param>
/// <param name="movt">Passed time from last movement change (in ms)</param>
/// <param name="avgp">Average Path Lenght</param>
/// <param name="from">Spell casted position</param>
/// <returns></returns>
public static PredictionResult WaypointAnlysis(AIBaseClient target, float width, float delay, float missileSpeed, float range, bool collisionable, SpellType type, List <Vector2> path, float avgt, float movt, float avgp, float anglediff, Vector2 from, float moveSpeed = 0, bool isDash = false)
{
if (moveSpeed == 0)
{
moveSpeed = target.MoveSpeed;
}
var result = new PredictionResult {
Unit = target
};
var flyTimeMax = 0f;
if (missileSpeed != 0) //skillshot with a missile
{
flyTimeMax = range / missileSpeed;
}
var tMin = delay + Game.Ping / 2000f + Program.SpellDelay / 1000f;
var tMax = flyTimeMax + delay + Game.Ping / 1000f + Program.SpellDelay / 1000f;
var pathTime = 0f;
var pathBounds = new[] { -1, -1 };
//find bounds
for (var i = 0; i < path.Count - 1; i++)
{
var t = path[i + 1].Distance(path[i]) / moveSpeed;
if (pathTime <= tMin && pathTime + t >= tMin)
{
pathBounds[0] = i;
}
if (pathTime <= tMax && pathTime + t >= tMax)
{
pathBounds[1] = i;
}
if (pathBounds[0] != -1 && pathBounds[1] != -1)
{
break;
}
pathTime += t;
}
//calculate cast & unit position
if (pathBounds[0] != -1 && pathBounds[1] != -1)
{
for (var k = pathBounds[0]; k <= pathBounds[1]; k++)
{
var direction = (path[k + 1] - path[k]).Normalized();
var distance = width;
var extender = target.BoundingRadius;
if (type == SpellType.Line)
{
extender = width;
}
var steps = (int)Math.Floor(path[k].Distance(path[k + 1]) / distance);
//split & anlyse current path
for (var i = 1; i < steps - 1; i++)
{
var pCenter = path[k] + (direction * distance * i);
var pA = pCenter - (direction * extender);
var pB = pCenter + (direction * extender);
var flytime = missileSpeed != 0 ? from.Distance(pCenter) / missileSpeed : 0f;
var t = flytime + delay + Game.Ping / 2000f + Program.SpellDelay / 1000f;
var currentPosition = target.PreviousPosition.ToVector2();
var arriveTimeA = currentPosition.Distance(pA) / moveSpeed;
var arriveTimeB = currentPosition.Distance(pB) / moveSpeed;
if (Math.Min(arriveTimeA, arriveTimeB) <= t && Math.Max(arriveTimeA, arriveTimeB) >= t)
{
result.HitChance = PredictionExtensions.GetHitChance(t, avgt, movt, avgp, anglediff);
result.CastPosition = pCenter;
result.UnitPosition = pCenter; //+ (direction * (t - Math.Min(arriveTimeA, arriveTimeB)) * moveSpeed);
return(result);
}
}
}
}
result.HitChance = HitChance.None;
result.CastPosition = target.PreviousPosition.ToVector2();
return(result);
}
/// <summary>
/// Gets Prediction result
/// </summary>
/// <param name="target">Target for spell</param>
/// <param name="width">Spell width</param>
/// <param name="delay">Spell delay</param>
/// <param name="missileSpeed">Spell missile speed</param>
/// <param name="range">Spell range</param>
/// <param name="collisionable">Spell collisionable</param>
/// <param name="path">Waypoints of target</param>
/// <param name="avgt">Average reaction time (in ms)</param>
/// <param name="movt">Passed time from last movement change (in ms)</param>
/// <param name="avgp">Average Path Lenght</param>
/// <param name="from">Spell casted position</param>
/// <param name="rangeCheckFrom">Spell range check fropm</param>
/// <param name="arconly">Is Arc</param>
/// <returns>Prediction result as <see cref="PredictionResult"/></returns>
public static PredictionResult GetPrediction(AIBaseClient target, float width, float delay, float missileSpeed, float range, bool collisionable, List <Vector2> path, float avgt, float movt, float avgp, float anglediff, Vector2 from, Vector2 rangeCheckFrom, bool arconly = true)
{
if (arconly)
{
if (target.Distance(from) < width || target.Distance(from) > range * 0.75f)
{
return(CirclePrediction.GetPrediction(target, width, delay, missileSpeed, range, collisionable, path, avgt, movt, avgp, anglediff, from, rangeCheckFrom));
}
var pred = LinePrediction.GetLinePrediction(target, 80f, delay, missileSpeed, range, collisionable, path, avgt, movt, avgp, anglediff, from, rangeCheckFrom);
if (pred.HitChance >= HitChance.Low)
{
pred.CastPosition = (from + (pred.CastPosition - from).Normalized() * range);
var cos = (float)Math.Cos((1 - pred.UnitPosition.Distance(from) / 820f) * Math.PI / 2);
var sin = (float)Math.Sin((1 - pred.UnitPosition.Distance(from) / 820f) * Math.PI / 2);
var x = cos * (pred.CastPosition.X - from.X) - sin * (pred.CastPosition.Y - from.Y) + from.X;
var y = sin * (pred.CastPosition.X - from.X) + cos * (pred.CastPosition.Y - from.Y) + from.Y;
pred.CastPosition = new Vector2(x, y);
}
return(pred);
}
var result = new PredictionResult();
if (path.Count <= 1) //if target is not moving, easy to hit
{
result.HitChance = HitChance.Immobile;
result.CastPosition = target.PreviousPosition.ToVector2();
result.UnitPosition = result.CastPosition;
return(result);
}
if (target is AIHeroClient aiHero && aiHero.IsCastingImporantSpell())
{
result.HitChance = HitChance.Immobile;
result.CastPosition = aiHero.PreviousPosition.ToVector2();
result.UnitPosition = result.CastPosition;
return(result);
}
if (target.IsImmobileTarget())
{
return(PredictionExtensions.GetImmobilePrediction(target, width, delay, missileSpeed, range, collisionable, SpellType.Circle, from, rangeCheckFrom));
}
if (target.IsDashing())
{
return(PredictionExtensions.GetDashingPrediction(target, width, delay, missileSpeed, range, collisionable, SpellType.Circle, from, rangeCheckFrom));
}
var targetDistance = rangeCheckFrom.Distance(target.PreviousPosition);
var flyTime = 0f;
if (missileSpeed != 0)
{
var Vt = (path[path.Count - 1] - path[0]).Normalized() * target.MoveSpeed;
var Vs = (target.PreviousPosition.ToVector2() - rangeCheckFrom).Normalized() * missileSpeed;
var Vr = Vs - Vt;
flyTime = targetDistance / Vr.Length();
if (path.Count > 5)
{
flyTime = targetDistance / missileSpeed;
}
}
var t = flyTime + delay + Game.Ping / 2000f + Program.SpellDelay / 1000f;
result.HitChance = PredictionExtensions.GetHitChance(t * 1000f, avgt, movt, avgp, anglediff);
//arc collision test
if (result.HitChance > HitChance.Low)
{
for (var i = 1; i < path.Count; i++)
{
var senderPos = rangeCheckFrom;
var testPos = path[i];
var multp = (testPos.Distance(senderPos) / 875.0f);
var dianaArc = new Geometry.Polygon(
ClipperWrapper.DefineArc(senderPos - new Vector2(875 / 2f, 20), testPos, (float)Math.PI * multp, 410, 200 * multp),
ClipperWrapper.DefineArc(senderPos - new Vector2(875 / 2f, 20), testPos, (float)Math.PI * multp, 410, 320 * multp));
if (!dianaArc.IsOutside(target.PreviousPosition.ToVector2()))
{
result.HitChance = HitChance.VeryHigh;
result.CastPosition = testPos;
result.UnitPosition = testPos;
return(result);
}
}
}
return(CirclePrediction.GetPrediction(target, width, delay, missileSpeed, range, collisionable, path, avgt, movt, avgp, anglediff, @from, rangeCheckFrom));
}