/// <summary>
/// Processes a potential collision between a blocker and a jouster.
/// Returns either the force of the jouster's thrust at the blocker, or Single.NaN if there was no collision.
/// </summary>
public static float CheckCollision(Blocker block, Jouster joust)
{
if (!block.ColShape.Touches(joust.ColShape)) return Single.NaN;
V2 lookDir = UsefulMath.FindDirection(joust.Rotation),
moveDir = joust.Velocity;
float stabStrength = joust.Mass * V2.Dot(lookDir, moveDir);
block.OnHitJouster(joust, stabStrength);
return stabStrength;
}
public void ResetGame()
{
AlphaParticles = new Utilities.Graphics.ParticleEffect(ArtAssets.EmptySprite, V2.Zero, new List<Utilities.Graphics.ParticleEffect.Particle>());
AdditiveParticles = new Utilities.Graphics.ParticleEffect(ArtAssets.EmptySprite, V2.Zero, new List<Utilities.Graphics.ParticleEffect.Particle>());
MoveUp = false;
MoveDown = false;
TimeSinceMinigameStart = 0.0f;
Harmony = new Jousting.Jouster(Jousting.Jousters.Harmony,
WorldData.GetStartingPos(CurrentZoom, Jousting.Jousters.Harmony),
CurrentZoom);
Dischord = new Jousting.Jouster(Jousting.Jousters.Dischord,
WorldData.GetStartingPos(CurrentZoom, Jousting.Jousters.Dischord),
CurrentZoom);
Blockers.Clear();
Timers.ClearTimers();
Reset();
}
public void OnHitJouster(Jouster joust, float stabForce)
{
if (OnHitByJouster != null) OnHitByJouster(this, new Jouster.HurtEventArgs(joust, stabForce));
float max = joust.MaxVelocity;
joust.MaxVelocity = 0.000001f;
MovementPhysics.Separate(this, joust, 0.2f * WorldData.ZoomScaleAmount[KarmaWorld.World.CurrentZoom]);
joust.MaxVelocity = max;
if (IsMovable)
{
//Define "tangent" as the line perpendicular to the line from the Blocker to the Jouster.
//Both entities keep the portion of momentum parallel to their tangent,
//But swap the portion of momentum perpendicular to their tangent.
V2 toJoust = joust.Pos - Pos;
V2 tangent = V2.Normalize(Utilities.Conversions.GetPerp(toJoust));
Utilities.Conversions.ParallelPerp blockerPP = Utilities.Conversions.SplitIntoComponents(Velocity, tangent),
joustPP = Utilities.Conversions.SplitIntoComponents(joust.Velocity, tangent);
Velocity = blockerPP.Parallel + (BounceVelocityDamp * joustPP.Perpendicular * joust.Mass / Mass);
joust.Velocity = joustPP.Parallel + (joust.PhysData.BounceEnergyScale * blockerPP.Perpendicular * Mass / joust.Mass);
}
else
{
//Push the jouster away from this Blocker.
V2 away = UsefulMath.FindDirection(Pos, joust.Pos);
Utilities.Conversions.ParallelPerp pp = Utilities.Conversions.SplitIntoComponents(joust.Velocity, away);
joust.Velocity = pp.Perpendicular + (joust.PhysData.BounceEnergyScale * -pp.Parallel);
}
}
/// <summary>
/// Checks for collision between the two given jousters and responds accordingly.
/// Returns the collision data for this collision, or 'null' if no collision occurred.
/// </summary>
public static CollisionData CheckCollision(Jouster first, Jouster second)
{
//If the players aren't touching, exit.
if (!first.ColShape.Touches(second.ColShape))
{
first.touchingOtherJouster = false;
second.touchingOtherJouster = false;
return null;
}
if (first.touchingOtherJouster || second.touchingOtherJouster) return null;
//If the players aren't moving fast enough relative to each other,
// exit.
if ((first.Velocity - second.Velocity).LengthSquared() <
PhysicsData.GetMinHitSpeed(KarmaWorld.World.CurrentZoom) *
PhysicsData.GetMinHitSpeed(KarmaWorld.World.CurrentZoom))
{
return null;
}
CollisionData col = new CollisionData();
//Get the component of the jousters' velocities that is along their forward movement.
//Use only this component in figuring out stab strength.
V2 lookDir1 = UsefulMath.FindDirection(first.Rotation),
lookDir2 = UsefulMath.FindDirection(second.Rotation),
moveDir1 = first.Velocity,
moveDir2 = second.Velocity;
col.StabStrength1 = first.Mass * V2.Dot(lookDir1, moveDir1);
col.StabStrength2 = second.Mass * V2.Dot(lookDir2, moveDir2);
if (first.IsSpiky) col.StabStrength1 *= Minigames.Minigame_1.PhysicsData1.SpikePowerScale;
if (second.IsSpiky) col.StabStrength2 *= Minigames.Minigame_1.PhysicsData1.SpikePowerScale;
//If neither player really did damage, exit.
if (col.StabStrength1 <= 0.0f && col.StabStrength2 <= 0.0f) return null;
first.touchingOtherJouster = true;
second.touchingOtherJouster = true;
if (col.StabStrength1 > col.StabStrength2)
{
first.Hurt(second, col.StabStrength1);
second.HurtBy(first, col.StabStrength1);
}
else
{
first.HurtBy(second, col.StabStrength2);
second.Hurt(first, col.StabStrength2);
}
return col;
}
public HurtEventArgs(Jouster enemy, float damageDealt)
{
Enemy = enemy; DamageDealt = damageDealt;
}
public void HurtBy(Jouster other, float stabDamage)
{
Health -= PhysicsData.GetDamage(stabDamage, WorldData.ZoomScaleAmount[KarmaWorld.World.CurrentZoom]);
Velocity += PhysData.BounceEnergyScale * PhysicsData.VelocityFromHit(stabDamage, UsefulMath.FindDirection(other.Rotation));
if (OnHurtByEnemy != null) OnHurtByEnemy(this, new HurtEventArgs(other, stabDamage));
}
public void Hurt(Jouster other, float stabDamage)
{
Velocity *= PhysData.BounceEnergyScale * PhysicsData.VelocityDampFromHit(stabDamage, MaxVelocity);
if (OnHurtEnemy != null) OnHurtEnemy(this, new HurtEventArgs(other, stabDamage));
}
/// <summary>
/// Resizes the given jouster by changing his mass by the given amount.
/// </summary>
private void ResizeJouster(float massChange, Jouster jouster)
{
jouster.Mass += massChange;
float scale = jouster.Mass / PhysicsData.JousterStartingMass[ZoomLevels.One];
ArtAssets.PlayerSprites[World.CurrentZoom][jouster.ThisJouster].DrawArgs.Scale = V2.One * scale;
V2 oldPos = jouster.Pos;
float oldRot = jouster.Rotation;
jouster.ColShape = ArtAssets.GetJousterShape(ZoomLevels.One, scale * WorldData.ZoomScaleAmount[ZoomLevels.One]);
jouster.Pos = oldPos;
jouster.Rotation = oldRot;
}
protected override void Update(Jouster.CollisionData playerCollision)
{
if (Dischord.IsSpiky_Aura)
{
//The aura can infect bacteria at a distance.
for (int i = 0; i < Blockers.Count; ++i)
{
if (V2.Distance(Blockers[i].Pos, Dischord.ColShape.ClosestOnEdgeToPoint(Blockers[i].Pos)) <
PhysicsData1.GetAuraDist(WorldData.ZoomScaleAmount[CurrentZoom]))
{
((Bacteria)Blockers[i]).Infect(WorldData.ZoomScaleAmount[CurrentZoom]);
}
}
}
ArtAssets1.Spikes.UpdateAnimation(World.CurrentTime);
}