public MissileCA(MissileCAInfo info, ProjectileArgs args)
{
this.info = info;
this.args = args;
pos = args.Source;
hFacing = args.Facing.Facing;
gravity = new WVec(0, 0, -info.Gravity);
targetPosition = args.PassiveTarget;
var limit = info.RangeLimit != WDist.Zero ? info.RangeLimit : args.Weapon.Range;
rangeLimit = new WDist(Util.ApplyPercentageModifiers(limit.Length, args.RangeModifiers));
minLaunchSpeed = info.MinimumLaunchSpeed.Length > -1 ? info.MinimumLaunchSpeed.Length : info.Speed.Length;
maxLaunchSpeed = info.MaximumLaunchSpeed.Length > -1 ? info.MaximumLaunchSpeed.Length : info.Speed.Length;
maxSpeed = info.Speed.Length;
minLaunchAngle = info.MinimumLaunchAngle;
maxLaunchAngle = info.MaximumLaunchAngle;
var world = args.SourceActor.World;
if (world.SharedRandom.Next(100) <= info.LockOnProbability)
{
lockOn = true;
}
var inaccuracy = lockOn && info.LockOnInaccuracy.Length > -1 ? info.LockOnInaccuracy.Length : info.Inaccuracy.Length;
if (inaccuracy > 0)
{
var maxInaccuracyOffset = Util.GetProjectileInaccuracy(info.Inaccuracy.Length, info.InaccuracyType, args);
offset = WVec.FromPDF(world.SharedRandom, 2) * maxInaccuracyOffset / 1024;
}
DetermineLaunchSpeedAndAngle(world, out speed, out vFacing);
velocity = new WVec(0, -speed, 0)
.Rotate(new WRot(WAngle.FromFacing(vFacing), WAngle.Zero, WAngle.Zero))
.Rotate(new WRot(WAngle.Zero, WAngle.Zero, WAngle.FromFacing(hFacing)));
if (!string.IsNullOrEmpty(info.Image))
{
anim = new Animation(world, info.Image, () => renderFacing);
anim.PlayRepeating(info.Sequences.Random(world.SharedRandom));
}
if (info.ContrailLength > 0)
{
var color = info.ContrailUsePlayerColor ? ContrailRenderable.ChooseColor(args.SourceActor) : info.ContrailColor;
contrail = new ContrailRenderable(world, color, info.ContrailWidth, info.ContrailLength, info.ContrailDelay, info.ContrailZOffset);
}
trailPalette = info.TrailPalette;
if (info.TrailUsePlayerPalette)
{
trailPalette += args.SourceActor.Owner.InternalName;
}
}
WVec HomingTick(World world, WVec tarDistVec, int relTarHorDist)
{
int predClfHgt = 0;
int predClfDist = 0;
int lastHtChg = 0;
int lastHt = 0;
if (info.TerrainHeightAware)
{
InclineLookahead(world, relTarHorDist, out predClfHgt, out predClfDist, out lastHtChg, out lastHt);
}
// Height difference between the incline height and missile height
var diffClfMslHgt = predClfHgt - pos.Z;
// Get underestimate of distance from target in next tick
var nxtRelTarHorDist = (relTarHorDist - speed - info.Acceleration.Length).Clamp(0, relTarHorDist);
// Target height relative to the missile
var relTarHgt = tarDistVec.Z;
// Compute which direction the projectile should be facing
var velVec = tarDistVec + predVel;
var desiredHFacing = velVec.HorizontalLengthSquared != 0 ? velVec.Yaw.Facing : hFacing;
var delta = Util.NormalizeFacing(hFacing - desiredHFacing);
if (allowPassBy && delta > 64 && delta < 192)
{
desiredHFacing = (desiredHFacing + 128) & 0xFF;
targetPassedBy = true;
}
else
{
targetPassedBy = false;
}
var desiredVFacing = HomingInnerTick(predClfDist, diffClfMslHgt, relTarHorDist, lastHtChg, lastHt,
nxtRelTarHorDist, relTarHgt, vFacing, targetPassedBy);
// The target has been passed by
if (tarDistVec.HorizontalLength < speed * WAngle.FromFacing(vFacing).Cos() / 1024)
{
targetPassedBy = true;
}
// Check whether the homing mechanism is jammed
var jammed = info.Jammable && world.ActorsWithTrait <JamsMissiles>().Any(JammedBy);
if (jammed)
{
desiredHFacing = hFacing + world.SharedRandom.Next(-info.JammedDiversionRange, info.JammedDiversionRange + 1);
desiredVFacing = vFacing + world.SharedRandom.Next(-info.JammedDiversionRange, info.JammedDiversionRange + 1);
}
else if (!args.GuidedTarget.IsValidFor(args.SourceActor))
{
desiredHFacing = hFacing;
}
// Compute new direction the projectile will be facing
hFacing = Util.TickFacing(hFacing, desiredHFacing, info.HorizontalRateOfTurn.Facing);
vFacing = Util.TickFacing(vFacing, desiredVFacing, info.VerticalRateOfTurn.Facing);
// Compute the projectile's guided displacement
return(new WVec(0, -1024 * speed, 0)
.Rotate(new WRot(WAngle.FromFacing(vFacing), WAngle.Zero, WAngle.Zero))
.Rotate(new WRot(WAngle.Zero, WAngle.Zero, WAngle.FromFacing(hFacing)))
/ 1024);
}
