public Mobj SpawnMissile(Mobj source, Mobj dest, MobjType type)
{
var missile = SpawnMobj(
source.X,
source.Y,
source.Z + Fixed.FromInt(32), type);
if (missile.Info.SeeSound != 0)
{
world.StartSound(missile, missile.Info.SeeSound);
}
// Where it came from?
missile.Target = source;
var angle = Geometry.PointToAngle(
source.X, source.Y,
dest.X, dest.Y);
// Fuzzy player.
if ((dest.Flags & MobjFlags.Shadow) != 0)
{
var random = world.Random;
angle += new Angle((random.Next() - random.Next()) << 20);
}
var speed = GetMissileSpeed(missile.Type);
missile.Angle = angle;
missile.MomX = new Fixed(speed) * Trig.Cos(angle);
missile.MomY = new Fixed(speed) * Trig.Sin(angle);
var dist = Geometry.AproxDistance(
dest.X - source.X,
dest.Y - source.Y);
var num = (dest.Z - source.Z).Data;
var den = (dist / speed).Data;
if (den < 1)
{
den = 1;
}
missile.MomZ = new Fixed(num / den);
CheckMissileSpawn(missile);
return(missile);
}
/// <summary>
/// Looks for special lines in front of the player to activate.
/// </summary>
public void UseLines(Player player)
{
var pt = world.PathTraversal;
useThing = player.Mobj;
var angle = player.Mobj.Angle;
var x1 = player.Mobj.X;
var y1 = player.Mobj.Y;
var x2 = x1 + useRange.ToIntFloor() * Trig.Cos(angle);
var y2 = y1 + useRange.ToIntFloor() * Trig.Sin(angle);
pt.PathTraverse(x1, y1, x2, y2, PathTraverseFlags.AddLines, useTraverseFunc);
}
//
// P_UseLines
// Looks for special lines in front of the player to activate.
//
public void UseLines(Player player)
{
var pt = world.PathTraversal;
usething = player.Mobj;
var angle = player.Mobj.Angle; // >> ANGLETOFINESHIFT;
var x1 = player.Mobj.X;
var y1 = player.Mobj.Y;
var x2 = x1 + (World.USERANGE.Data >> Fixed.FracBits) * Trig.Cos(angle); // finecosine[angle];
var y2 = y1 + (World.USERANGE.Data >> Fixed.FracBits) * Trig.Sin(angle); // finesine[angle];
pt.PathTraverse(x1, y1, x2, y2, PathTraverseFlags.AddLines, ic => PTR_UseTraverse(ic));
}
/// <summary>
/// Fire a hitscan bullet.
/// If damage == 0, it is just a test trace that will leave linetarget set.
/// </summary>
public void LineAttack(Mobj shooter, Angle angle, Fixed range, Fixed slope, int damage)
{
currentShooter = shooter;
currentShooterZ = shooter.Z + (shooter.Height >> 1) + Fixed.FromInt(8);
currentRange = range;
currentAimSlope = slope;
currentDamage = damage;
var targetX = shooter.X + range.ToIntFloor() * Trig.Cos(angle);
var targetY = shooter.Y + range.ToIntFloor() * Trig.Sin(angle);
world.PathTraversal.PathTraverse(
shooter.X, shooter.Y,
targetX, targetY,
PathTraverseFlags.AddLines | PathTraverseFlags.AddThings,
shootTraverseFunc);
}
public void SpawnPlayerMissile(Mobj source, MobjType type)
{
var hs = world.Hitscan;
// See which target is to be aimed at.
var angle = source.Angle;
var slope = hs.AimLineAttack(source, angle, Fixed.FromInt(16 * 64));
if (hs.LineTarget == null)
{
angle += new Angle(1 << 26);
slope = hs.AimLineAttack(source, angle, Fixed.FromInt(16 * 64));
if (hs.LineTarget == null)
{
angle -= new Angle(2 << 26);
slope = hs.AimLineAttack(source, angle, Fixed.FromInt(16 * 64));
}
if (hs.LineTarget == null)
{
angle = source.Angle;
slope = Fixed.Zero;
}
}
var x = source.X;
var y = source.Y;
var z = source.Z + Fixed.FromInt(32);
var missile = SpawnMobj(x, y, z, type);
if (missile.Info.SeeSound != 0)
{
world.StartSound(missile, missile.Info.SeeSound);
}
missile.Target = source;
missile.Angle = angle;
missile.MomX = new Fixed(missile.Info.Speed) * Trig.Cos(angle);
missile.MomY = new Fixed(missile.Info.Speed) * Trig.Sin(angle);
missile.MomZ = new Fixed(missile.Info.Speed) * slope;
CheckMissileSpawn(missile);
}
public void FatAttack2(Mobj actor)
{
FaceTarget(actor);
var ta = world.ThingAllocation;
// Now here choose opposite deviation.
actor.Angle -= fatSpread;
ta.SpawnMissile(actor, actor.Target, MobjType.Fatshot);
var missile = ta.SpawnMissile(actor, actor.Target, MobjType.Fatshot);
missile.Angle -= fatSpread * 2;
var angle = missile.Angle;
missile.MomX = new Fixed(missile.Info.Speed) * Trig.Cos(angle);
missile.MomY = new Fixed(missile.Info.Speed) * Trig.Sin(angle);
}
public void FatAttack1(Mobj actor)
{
FaceTarget(actor);
var ta = world.ThingAllocation;
// Change direction to...
actor.Angle += fatSpread;
ta.SpawnMissile(actor, actor.Target, MobjType.Fatshot);
var missile = ta.SpawnMissile(actor, actor.Target, MobjType.Fatshot);
missile.Angle += fatSpread;
var angle = missile.Angle;
missile.MomX = new Fixed(missile.Info.Speed) * Trig.Cos(angle);
missile.MomY = new Fixed(missile.Info.Speed) * Trig.Sin(angle);
}
public void PainShootSkull(Mobj actor, Angle angle)
{
// Count total number of skull currently on the level.
var count = 0;
foreach (var thinker in world.Thinkers)
{
var mobj = thinker as Mobj;
if (mobj != null && mobj.Type == MobjType.Skull)
{
count++;
}
}
// If there are allready 20 skulls on the level,
// don't spit another one.
if (count > 20)
{
return;
}
// Okay, there's playe for another one.
var preStep = Fixed.FromInt(4) +
3 * (actor.Info.Radius + DoomInfo.MobjInfos[(int)MobjType.Skull].Radius) / 2;
var x = actor.X + preStep * Trig.Cos(angle);
var y = actor.Y + preStep * Trig.Sin(angle);
var z = actor.Z + Fixed.FromInt(8);
var skull = world.ThingAllocation.SpawnMobj(x, y, z, MobjType.Skull);
// Check for movements.
if (!world.ThingMovement.TryMove(skull, skull.X, skull.Y))
{
// Kill it immediately.
world.ThingInteraction.DamageMobj(skull, actor, actor, 10000);
return;
}
skull.Target = actor.Target;
SkullAttack(skull);
}
public void FatAttack3(Mobj actor)
{
FaceTarget(actor);
var ta = world.ThingAllocation;
var missile1 = ta.SpawnMissile(actor, actor.Target, MobjType.Fatshot);
missile1.Angle -= fatSpread / 2;
var angle1 = missile1.Angle;
missile1.MomX = new Fixed(missile1.Info.Speed) * Trig.Cos(angle1);
missile1.MomY = new Fixed(missile1.Info.Speed) * Trig.Sin(angle1);
var missile2 = ta.SpawnMissile(actor, actor.Target, MobjType.Fatshot);
missile2.Angle += fatSpread / 2;
var angle2 = missile2.Angle;
missile2.MomX = new Fixed(missile2.Info.Speed) * Trig.Cos(angle2);
missile2.MomY = new Fixed(missile2.Info.Speed) * Trig.Sin(angle2);
}
/// <summary>
/// Adjusts the x and y movement so that the next move will
/// slide along the wall.
/// </summary>
private void HitSlideLine(LineDef line)
{
if (line.SlopeType == SlopeType.Horizontal)
{
slideMoveY = Fixed.Zero;
return;
}
if (line.SlopeType == SlopeType.Vertical)
{
slideMoveX = Fixed.Zero;
return;
}
var side = Geometry.PointOnLineSide(slideThing.X, slideThing.Y, line);
var lineAngle = Geometry.PointToAngle(Fixed.Zero, Fixed.Zero, line.Dx, line.Dy);
if (side == 1)
{
lineAngle += Angle.Ang180;
}
var moveAngle = Geometry.PointToAngle(Fixed.Zero, Fixed.Zero, slideMoveX, slideMoveY);
var deltaAngle = moveAngle - lineAngle;
if (deltaAngle > Angle.Ang180)
{
deltaAngle += Angle.Ang180;
}
var moveDist = Geometry.AproxDistance(slideMoveX, slideMoveY);
var newDist = moveDist * Trig.Cos(deltaAngle);
slideMoveX = newDist * Trig.Cos(lineAngle);
slideMoveY = newDist * Trig.Sin(lineAngle);
}
//
// G_CheckSpot
// Returns false if the player cannot be respawned
// at the given mapthing_t spot
// because something is occupying it
//
public bool G_CheckSpot(int playernum, MapThing mthing)
{
if (Players[playernum].Mobj == null)
{
// first spawn of level, before corpses
for (var i = 0; i < playernum; i++)
{
if (Players[i].Mobj.X == mthing.X && Players[i].Mobj.Y == mthing.Y)
{
return(false);
}
}
return(true);
}
var x = mthing.X;
var y = mthing.Y;
if (!thingMovement.CheckPosition(Players[playernum].Mobj, x, y))
{
return(false);
}
// flush an old corpse if needed
if (bodyqueslot >= BODYQUESIZE)
{
thingAllocation.RemoveMobj(bodyque[bodyqueslot % BODYQUESIZE]);
}
bodyque[bodyqueslot % BODYQUESIZE] = Players[playernum].Mobj;
bodyqueslot++;
// spawn a teleport fog
var ss = Geometry.PointInSubsector(x, y, map);
var an = (Angle.Ang45.Data >> Trig.AngleToFineShift) * ((int)Math.Round(mthing.Angle.ToDegree()) / 45);
Fixed xa;
Fixed ya;
switch (an)
{
case 4096: // -4096:
xa = Trig.Tan(2048); // finecosine[-4096]
ya = Trig.Tan(0); // finesine[-4096]
break;
case 5120: // -3072:
xa = Trig.Tan(3072); // finecosine[-3072]
ya = Trig.Tan(1024); // finesine[-3072]
break;
case 6144: // -2048:
xa = Trig.Sin(0); // finecosine[-2048]
ya = Trig.Tan(2048); // finesine[-2048]
break;
case 7168: // -1024:
xa = Trig.Sin(1024); // finecosine[-1024]
ya = Trig.Tan(3072); // finesine[-1024]
break;
case 0:
case 1024:
case 2048:
case 3072:
xa = Trig.Cos((int)an);
ya = Trig.Sin((int)an);
break;
default:
throw new Exception("G_CheckSpot: unexpected angle " + an);
}
var mo = thingAllocation.SpawnMobj(
x + 20 * xa, y + 20 * ya,
ss.Sector.FloorHeight,
MobjType.Tfog);
if (Players[Options.ConsolePlayer].ViewZ != new Fixed(1))
{
// don't start sound on first frame
StartSound(mo, Sfx.TELEPT);
}
return(true);
}
/// <summary>
/// Calculate the angle of the line passing through the two points.
/// </summary>
public static Angle PointToAngle(Fixed fromX, Fixed fromY, Fixed toX, Fixed toY)
{
var x = toX - fromX;
var y = toY - fromY;
if (x == Fixed.Zero && y == Fixed.Zero)
{
return(Angle.Ang0);
}
if (x >= Fixed.Zero)
{
// x >= 0
if (y >= Fixed.Zero)
{
// y >= 0
if (x > y)
{
// octant 0
return(Trig.TanToAngle(SlopeDiv(y, x)));
}
else
{
// octant 1
return(new Angle(Angle.Ang90.Data - 1) - Trig.TanToAngle(SlopeDiv(x, y)));
}
}
else
{
// y < 0
y = -y;
if (x > y)
{
// octant 8
return(-Trig.TanToAngle(SlopeDiv(y, x)));
}
else
{
// octant 7
return(Angle.Ang270 + Trig.TanToAngle(SlopeDiv(x, y)));
}
}
}
else
{
// x < 0
x = -x;
if (y >= Fixed.Zero)
{
// y >= 0
if (x > y)
{
// octant 3
return(new Angle(Angle.Ang180.Data - 1) - Trig.TanToAngle(SlopeDiv(y, x)));
}
else
{
// octant 2
return(Angle.Ang90 + Trig.TanToAngle(SlopeDiv(x, y)));
}
}
else
{
// y < 0
y = -y;
if (x > y)
{
// octant 4
return(Angle.Ang180 + Trig.TanToAngle(SlopeDiv(y, x)));
}
else
{
// octant 5
return(new Angle(Angle.Ang270.Data - 1) - Trig.TanToAngle(SlopeDiv(x, y)));
}
}
}
}
/// <summary>
/// Calculate the walking / running height adjustment.
/// </summary>
public void CalcHeight(Player player)
{
// Regular movement bobbing.
// It needs to be calculated for gun swing even if not on ground.
player.Bob = player.Mobj.MomX * player.Mobj.MomX + player.Mobj.MomY * player.Mobj.MomY;
player.Bob >>= 2;
if (player.Bob > maxBob)
{
player.Bob = maxBob;
}
if ((player.Cheats & CheatFlags.NoMomentum) != 0 || !onGround)
{
player.ViewZ = player.Mobj.Z + Player.NormalViewHeight;
if (player.ViewZ > player.Mobj.CeilingZ - Fixed.FromInt(4))
{
player.ViewZ = player.Mobj.CeilingZ - Fixed.FromInt(4);
}
player.ViewZ = player.Mobj.Z + player.ViewHeight;
return;
}
var angle = (Trig.FineAngleCount / 20 * world.LevelTime) & Trig.FineMask;
var bob = (player.Bob / 2) * Trig.Sin(angle);
// Move viewheight.
if (player.PlayerState == PlayerState.Live)
{
player.ViewHeight += player.DeltaViewHeight;
if (player.ViewHeight > Player.NormalViewHeight)
{
player.ViewHeight = Player.NormalViewHeight;
player.DeltaViewHeight = Fixed.Zero;
}
if (player.ViewHeight < Player.NormalViewHeight / 2)
{
player.ViewHeight = Player.NormalViewHeight / 2;
if (player.DeltaViewHeight <= Fixed.Zero)
{
player.DeltaViewHeight = new Fixed(1);
}
}
if (player.DeltaViewHeight != Fixed.Zero)
{
player.DeltaViewHeight += Fixed.One / 4;
if (player.DeltaViewHeight == Fixed.Zero)
{
player.DeltaViewHeight = new Fixed(1);
}
}
}
player.ViewZ = player.Mobj.Z + player.ViewHeight + bob;
if (player.ViewZ > player.Mobj.CeilingZ - Fixed.FromInt(4))
{
player.ViewZ = player.Mobj.CeilingZ - Fixed.FromInt(4);
}
}
/// <summary>
/// Damages both enemies and players.
/// "inflictor" is the thing that caused the damage creature
/// or missile, can be null (slime, etc).
/// "source" is the thing to target after taking damage creature
/// or null.
/// Source and inflictor are the same for melee attacks.
/// Source can be null for slime, barrel explosions and other
/// environmental stuff.
/// </summary>
public void DamageMobj(Mobj target, Mobj inflictor, Mobj source, int damage)
{
if ((target.Flags & MobjFlags.Shootable) == 0)
{
// Shouldn't happen...
return;
}
if (target.Health <= 0)
{
return;
}
if ((target.Flags & MobjFlags.SkullFly) != 0)
{
target.MomX = target.MomY = target.MomZ = Fixed.Zero;
}
var player = target.Player;
if (player != null && world.Options.Skill == GameSkill.Baby)
{
// Take half damage in trainer mode.
damage >>= 1;
}
// Some close combat weapons should not inflict thrust and
// push the victim out of reach, thus kick away unless using the chainsaw.
var notChainsawAttack =
source == null ||
source.Player == null ||
source.Player.ReadyWeapon != WeaponType.Chainsaw;
if (inflictor != null && (target.Flags & MobjFlags.NoClip) == 0 && notChainsawAttack)
{
var ang = Geometry.PointToAngle(
inflictor.X,
inflictor.Y,
target.X,
target.Y);
var thrust = new Fixed(damage * (Fixed.FracUnit >> 3) * 100 / target.Info.Mass);
// Make fall forwards sometimes.
if (damage < 40 &&
damage > target.Health &&
target.Z - inflictor.Z > Fixed.FromInt(64) &&
(world.Random.Next() & 1) != 0)
{
ang += Angle.Ang180;
thrust *= 4;
}
target.MomX += thrust * Trig.Cos(ang);
target.MomY += thrust * Trig.Sin(ang);
}
// Player specific.
if (player != null)
{
// End of game hell hack.
if (target.Subsector.Sector.Special == (SectorSpecial)11 && damage >= target.Health)
{
damage = target.Health - 1;
}
// Below certain threshold, ignore damage in GOD mode, or with INVUL power.
if (damage < 1000 && ((player.Cheats & CheatFlags.GodMode) != 0 ||
player.Powers[(int)PowerType.Invulnerability] > 0))
{
return;
}
int saved;
if (player.ArmorType != 0)
{
if (player.ArmorType == 1)
{
saved = damage / 3;
}
else
{
saved = damage / 2;
}
if (player.ArmorPoints <= saved)
{
// Armor is used up.
saved = player.ArmorPoints;
player.ArmorType = 0;
}
player.ArmorPoints -= saved;
damage -= saved;
}
// Mirror mobj health here for Dave.
player.Health -= damage;
if (player.Health < 0)
{
player.Health = 0;
}
player.Attacker = source;
// Add damage after armor / invuln.
player.DamageCount += damage;
if (player.DamageCount > 100)
{
// Teleport stomp does 10k points...
player.DamageCount = 100;
}
}
// Do the damage.
target.Health -= damage;
if (target.Health <= 0)
{
KillMobj(source, target);
return;
}
if ((world.Random.Next() < target.Info.PainChance) &&
(target.Flags & MobjFlags.SkullFly) == 0)
{
// Fight back!
target.Flags |= MobjFlags.JustHit;
target.SetState(target.Info.PainState);
}
// We're awake now...
target.ReactionTime = 0;
if ((target.Threshold == 0 || target.Type == MobjType.Vile) &&
source != null &&
source != target &&
source.Type != MobjType.Vile)
{
// If not intent on another player, chase after this one.
target.Target = source;
target.Threshold = baseThreshold;
if (target.State == DoomInfo.States[(int)target.Info.SpawnState] &&
target.Info.SeeState != MobjState.Null)
{
target.SetState(target.Info.SeeState);
}
}
}
/// <summary>
/// Moves the given origin along a given angle.
/// </summary>
public void Thrust(Player player, Angle angle, Fixed move)
{
player.Mobj.MomX += move * Trig.Cos(angle);
player.Mobj.MomY += move * Trig.Sin(angle);
}
public void Tracer(Mobj actor)
{
if ((world.Options.GameTic & 3) != 0)
{
return;
}
// Spawn a puff of smoke behind the rocket.
world.Hitscan.SpawnPuff(actor.X, actor.Y, actor.Z);
var smoke = world.ThingAllocation.SpawnMobj(
actor.X - actor.MomX,
actor.Y - actor.MomY,
actor.Z,
MobjType.Smoke);
smoke.MomZ = Fixed.One;
smoke.Tics -= world.Random.Next() & 3;
if (smoke.Tics < 1)
{
smoke.Tics = 1;
}
// Adjust direction.
var dest = actor.Tracer;
if (dest == null || dest.Health <= 0)
{
return;
}
// Change angle.
var exact = Geometry.PointToAngle(
actor.X, actor.Y,
dest.X, dest.Y);
if (exact != actor.Angle)
{
if (exact - actor.Angle > Angle.Ang180)
{
actor.Angle -= traceAngle;
if (exact - actor.Angle < Angle.Ang180)
{
actor.Angle = exact;
}
}
else
{
actor.Angle += traceAngle;
if (exact - actor.Angle > Angle.Ang180)
{
actor.Angle = exact;
}
}
}
exact = actor.Angle;
actor.MomX = new Fixed(actor.Info.Speed) * Trig.Cos(exact);
actor.MomY = new Fixed(actor.Info.Speed) * Trig.Sin(exact);
// Change slope.
var dist = Geometry.AproxDistance(
dest.X - actor.X,
dest.Y - actor.Y);
var num = (dest.Z + Fixed.FromInt(40) - actor.Z).Data;
var den = dist.Data / actor.Info.Speed;
if (den < 1)
{
den = 1;
}
var slope = new Fixed(num / den);
if (slope < actor.MomZ)
{
actor.MomZ -= Fixed.One / 8;
}
else
{
actor.MomZ += Fixed.One / 8;
}
}
/// <summary>
/// Returns false if the player cannot be respawned at the given
/// mapthing spot because something is occupying it.
/// </summary>
public bool CheckSpot(int playernum, MapThing mthing)
{
var players = world.Options.Players;
if (players[playernum].Mobj == null)
{
// First spawn of level, before corpses.
for (var i = 0; i < playernum; i++)
{
if (players[i].Mobj.X == mthing.X && players[i].Mobj.Y == mthing.Y)
{
return(false);
}
}
return(true);
}
var x = mthing.X;
var y = mthing.Y;
if (!world.ThingMovement.CheckPosition(players[playernum].Mobj, x, y))
{
return(false);
}
// Flush an old corpse if needed.
if (bodyQueSlot >= bodyQueSize)
{
RemoveMobj(bodyQue[bodyQueSlot % bodyQueSize]);
}
bodyQue[bodyQueSlot % bodyQueSize] = players[playernum].Mobj;
bodyQueSlot++;
// Spawn a teleport fog.
var subsector = Geometry.PointInSubsector(x, y, world.Map);
var angle = (Angle.Ang45.Data >> Trig.AngleToFineShift) *
((int)Math.Round(mthing.Angle.ToDegree()) / 45);
//
// The code below to reproduce respawn fog bug in deathmath
// is based on Chocolate Doom's implementation.
//
Fixed xa;
Fixed ya;
switch (angle)
{
case 4096: // -4096:
xa = Trig.Tan(2048); // finecosine[-4096]
ya = Trig.Tan(0); // finesine[-4096]
break;
case 5120: // -3072:
xa = Trig.Tan(3072); // finecosine[-3072]
ya = Trig.Tan(1024); // finesine[-3072]
break;
case 6144: // -2048:
xa = Trig.Sin(0); // finecosine[-2048]
ya = Trig.Tan(2048); // finesine[-2048]
break;
case 7168: // -1024:
xa = Trig.Sin(1024); // finecosine[-1024]
ya = Trig.Tan(3072); // finesine[-1024]
break;
case 0:
case 1024:
case 2048:
case 3072:
xa = Trig.Cos((int)angle);
ya = Trig.Sin((int)angle);
break;
default:
throw new Exception("Unexpected angle: " + angle);
}
var mo = SpawnMobj(
x + 20 * xa, y + 20 * ya,
subsector.Sector.FloorHeight,
MobjType.Tfog);
if (!world.FirstTicIsNotYetDone)
{
// Don't start sound on first frame.
world.StartSound(mo, Sfx.TELEPT, SfxType.Misc);
}
return(true);
}