public void CheckAndApplyEffect(PhysicalBody other, TimeSpan time)
{
if (Exploding && _explodeTimer > TimeSpan.Zero)
{
_destroyEffect.TryApply(_destroyPosition, other, time);
_explodeTimer -= time;
}
}
public void CheckCollisions(GameTime gameTime, PhysicalBody unit)
{
foreach (IConsumable item in _slots)
{
if (item is ProjectileWeapon)
{
(item as ProjectileWeapon).CheckAndApplyCollision(unit, gameTime.ElapsedGameTime);
}
}
}
public override void CheckAndApplyCollision(PhysicalBody unit, TimeSpan time)
{
if (_hookState == HookState.Fired || _hookState == HookState.Retracting)
{
if (XnaHelper.RectsCollide(_hookHitRect, unit.HitRect))
{
_hookedUnit = unit;
_hookState = HookState.Attached;
}
}
}
public override void CheckAndApplyCollision(PhysicalBody unit, TimeSpan time)
{
if (!_firing || !unit.Collides)
return; //don't check collisions if not firing
float fireAngle = XnaHelper.RadiansFromVector(_fireDirection);
if (XnaHelper.RectangleIntersectsArc(unit.HitRect, _owner.Center, _range, fireAngle, _hitArc))
{
_tempVector = unit.Center - _owner.Center;
_tempVector.Normalize();
unit.ApplyImpact(_force * _tempVector, 1);
unit.ApplyDamage(_damage);
}
}
/// <summary>
/// Check if target unit is in range. If so, apply force and damage
/// </summary>
/// <param name="effectPos">origin of effect</param>
/// <param name="target">target unit</param>
public void TryApply(Vector2 effectPos, PhysicalBody target, TimeSpan time)
{
if (utility.XnaHelper.RectangleIntersectsCircle(target.HitRect, effectPos, _radius))
{
tempVec.X = target.Position.X - effectPos.X;
tempVec.Y = target.Position.Y - effectPos.Y;
Vector2.Normalize(tempVec);
float factor = Duration == TimeSpan.Zero ? 1 : (float)time.TotalSeconds / (float)Duration.TotalSeconds;
target.ApplyForce(_force * factor * tempVec);
target.ApplyDamage((_damage * factor));
target.ApplyStatus(_statEffects);
}
}
public void CheckAndApplyCollision(PhysicalBody u, TimeSpan time)
{
if (!u.Collides)
return;
switch (_state)
{
case State.Dormant:
break;
case State.Moving:
if (u.HitRect.Intersects(_hitRect))
{
if (_penetration != -1)
{
_penetration -= 1;
if (_penetration <= 0)
_state = State.JustHit;
}
u.ApplyImpact(_velocity, _mass);
}
_proximityEffect.TryApply(_position, u, time);
break;
case State.JustHit:
break;
case State.ApplyContactEffect:
_contactEffect.TryApply(_position, u, time);
break;
case State.ReachedDestination:
_destinationEffect.TryApply(_position, u, time);
break;
default:
break;
}
}
/// <summary> /// Check if weapon is hitting a target, and apply its affects if so /// Call during the update loop on each unit /// </summary> /// <param name="unit"></param> public abstract void CheckAndApplyCollision(PhysicalBody unit, TimeSpan time);
public virtual void CheckAndApplyUnitCollision(PhysicalBody other)
{
if (!Collides)
return; //don't check collision if unit shouldn't collide
//special shattered collision detection
if (_lifeState == LifeState.Shattered)
{
tempRec.Width = _hitRect.Width / c_shatterDivisions;
tempRec.Height = _hitRect.Height / c_shatterDivisions;
for (int i = 0; i < c_shatterDivisions ; i++)
for (int j = 0; j < c_shatterDivisions; j++)
{
tempRec.X = (int)(_fragments[i,j].Position.X - tempRec.Width / 2);
tempRec.Y = (int)(_fragments[i,j].Position.Y - tempRec.Height / 2);
if (tempRec.Intersects(other.HitRect))
{
Vector2 fVel = _fragments[i, j].Velocity;
float fMass = (float)Mass / (c_shatterDivisions * c_shatterDivisions);
temp = other.Velocity;
other._velocity = (other._velocity * (other.Mass - fMass) + 2 * fMass * fVel) /
(fMass + other.Mass);
_fragments[i,j].Velocity = (fVel * (fMass - other.Mass) + 2 * other.Mass * temp) /
(fMass + other.Mass);
}
}
return; //ignore normal collision detection
}
//check if fire should be transferred
float dist = XnaHelper.DistanceBetweenRects(HitRect, other.HitRect);
if (dist < FIRE_SPREAD_DISTANCE)
{
if (_statusEffects.Fire > other._statusEffects.Fire)
{
StatEffect transfer = new StatEffect() { Fire = FIRE_SPREAD_FACTOR * dist / FIRE_SPREAD_DISTANCE * _statusEffects.Fire };
other.ApplyStatus(transfer);
ApplyStatus(transfer * -FIRE_SPREAD_LOSS);
}
}
if (XnaHelper.RectsCollide(HitRect, other.HitRect))
{
temp = other._velocity; //temp is a static reusable vector
other._velocity = (other._velocity * (other.Mass - this.Mass) + 2 * this.Mass * this._velocity) /
(this.Mass + other.Mass);
this._velocity = (this._velocity * (this.Mass - other.Mass) + 2 * other.Mass * temp) /
(this.Mass + other.Mass);
}
}
public override void CheckAndApplyCollision(PhysicalBody unit, TimeSpan time)
{
if (!unit.Collides)
return;
foreach (Projectile p in _projectiles)
{
p.CheckAndApplyCollision(unit, time);
}
}
/// <summary>
/// Apply Gravity on a unit and eat it if close enough
/// call on each unit during unit update loop
/// </summary>
/// <param name="unit">unit to affect. Should be called after updating unit</param>
public void ApplyToUnit(PhysicalBody unit, GameTime gameTime)
{
float massEaten;
if (_state != BlackHoleState.Pulling && _state != BlackHoleState.Overdrive)
return;
if (_state == BlackHoleState.Pulling)
{
unit.ApplyGravity(Gravity, gameTime);
}
else if (_state == BlackHoleState.Overdrive)
{
unit.FlyToPoint(Position, _overdriveTimer, 2.0f);
}
if ((massEaten = unit.EatByBlackHole(Position, _radius)) > 0)
{
_capacityUsed += massEaten;
_particleEffect.IntensityFactor = 1.0f + _capacityUsed / _totalCapacity;
Gravity.MagnitudeFactor = (1.0f + _capacityUsed / _totalCapacity);
if (_capacityUsed > _totalCapacity)
{
goOverdrive();
}
}
}
public void CheckAndApplyCollision(PhysicalBody unit, GameTime gameTime)
{
switch (_state)
{
case State.Dormant:
break;
case State.Appearing:
case State.Scanning:
unit.ApplyGravity(_gravity, gameTime);
break;
case State.Charging:
unit.ApplyGravity(_gravity, gameTime);
if (willCollide(unit.Top, unit.Bottom, unit.Left, unit.Right, gameTime.ElapsedGameTime))
{
unit.ApplyImpact(_velocity, IMPACT_IMPULSE);
unit.ApplyDamage(IMPACT_DAMAGE);
break;
}
break;
}
}