public static void ResolveCollision(T2DSceneObject ourObject, T2DSceneObject theirObject, ref T2DCollisionInfo info,
T2DCollisionMaterial material, bool handleBoth)
{
theirObject.Physics.Velocity = Vector2.Zero;
ourObject.Physics.Velocity = Vector2.Zero;
ourObject.MarkForDelete = true;
}
protected override void _onEnter(T2DSceneObject ourObject, T2DSceneObject theirObject, T2DCollisionInfo info)
{
TrapComponent trapComponent = trapObject.Components.FindComponent<TrapComponent>();
trapComponent.Activate();
ourObject.CollisionsEnabled = false;
ourObject.MarkForDelete = true;
}
public static void EtherealCollision(T2DSceneObject ourObject, T2DSceneObject theirObject, ref T2DCollisionInfo info,
T2DCollisionMaterial material, bool handleBoth)
{
// Start player's flashing animation to indicate she was hit.
PlayerActorComponent actor = theirObject.Components.FindComponent<PlayerActorComponent>();
if (actor != null && !actor.IsInvincible)
actor.ApplyDamageEffects();
}
protected override void _onEnter(T2DSceneObject ourObject, T2DSceneObject theirObject, T2DCollisionInfo info)
{
ActorComponent actor = theirObject.Components.FindComponent<ActorComponent>();
if (actor == null)
return;
actor.Kill(Owner as T2DSceneObject);
}
protected override void _onEnter(T2DSceneObject ourObject, T2DSceneObject theirObject, T2DCollisionInfo info)
{
ActorComponent actor = theirObject.Components.FindComponent<ActorComponent>();
if (actor == null)
return;
if (_confirmDamage(ourObject, theirObject, actor))
actor.TakeDamage(_damage, ourObject);
}
protected override void _onEnter(T2DSceneObject ourObject, T2DSceneObject theirObject, T2DCollisionInfo info)
{
PlayerActorComponent player = theirObject.Components.FindComponent<PlayerActorComponent>();
if (player == null)
return;
else
player.SwitchToFallDeath();
base._onEnter(ourObject, theirObject, info);
}
protected override void _onEnter(T2DSceneObject ourObject, T2DSceneObject theirObject, T2DCollisionInfo info)
{
BairneActorComponent actor = theirObject.Components.FindComponent<BairneActorComponent>();
if (actor != null)
{
actor.OnLeft = onLeft;
actor.ReachedBound = true;
actor.HorizontalStop();
}
else
;//log error
}
/// <summary>
/// The routine run when the player collides with the object.
/// </summary>
/// <param name="ourObject">The trigger object.</param>
/// <param name="theirObject">The player that collided with the trigger.</param>
/// <param name="info">Some sort of info...</param>
protected override void _onEnter(T2DSceneObject ourObject, T2DSceneObject theirObject, T2DCollisionInfo info)
{
if (!flipped)
{
switchedOn = !switchedOn;
if (behaviors != null)
foreach (ISwitchBehavior behavior in behaviors)
behavior.Execute(ourObject, switchedOn);
flipped = true;
}
}
///<summary>
///Callback for when the microbe collides with another object.
///</summary>
///<param name="ourObject">The microbe.</param>
///<param name="theirObject">The other object.</param>
///<param name="info">Information about the collision point.</param>
///<param name="resolve">Not used.</param>
///<param name="physicsMaterial">
///The physics properties of the objects.
///</param>
public void OnCollision(
T2DSceneObject ourObject,
T2DSceneObject theirObject,
T2DCollisionInfo info,
ref T2DResolveCollisionDelegate resolve,
ref T2DCollisionMaterial physicsMaterial)
{
if (!ourObject.MarkForDelete &&
theirObject.TestObjectType(_collidesWith))
{
//handle microbe collision with another microbe
if (theirObject.TestObjectType(
TorqueObjectDatabase.Instance.GetObjectType("microbe")))
{
T2DPhysicsComponent.BounceCollision.Invoke(
ourObject, theirObject, ref info, physicsMaterial, false);
//T2DPhysicsComponent.ClampCollision.Invoke(
//ourObject, theirObject, ref info, physicsMaterial, false);
//T2DPhysicsComponent.KillCollision.Invoke(
//ourObject, theirObject, ref info, physicsMaterial, false);
//T2DPhysicsComponent.RigidCollision.Invoke(
//ourObject, theirObject, ref info, physicsMaterial, false);
//T2DPhysicsComponent.StickyCollision.Invoke(
//ourObject, theirObject, ref info, physicsMaterial, false);
}
else if (theirObject.TestObjectType(
TorqueObjectDatabase.Instance.GetObjectType("projectile")))
{
//T2DPhysicsComponent.BounceCollision.Invoke(
// ourObject, theirObject, ref info, physicsMaterial, false);
//T2DPhysicsComponent.ClampCollision.Invoke(
//ourObject, theirObject, ref info, physicsMaterial, false);
T2DPhysicsComponent.KillCollision.Invoke(
ourObject, theirObject, ref info, physicsMaterial, false);
//T2DPhysicsComponent.RigidCollision.Invoke(
//ourObject, theirObject, ref info, physicsMaterial, false);
//T2DPhysicsComponent.StickyCollision.Invoke(
//ourObject, theirObject, ref info, physicsMaterial, false);
}
//TODO: add handling for other object types
}
}
/// <summary>
/// T2DOnCollision delegate to handle damage between the melee scene object and enemies
/// </summary>
/// <param name="myObject">The melee scene object mounted on the player</param>
/// <param name="theirObject">The enemy scene object</param>
/// <param name="info">Collision information</param>
/// <param name="resolve">How the collision will be resolved</param>
/// <param name="physicsMaterial">The type of material that would affect the physics</param>
public static void MeleeCollision(T2DSceneObject myObject, T2DSceneObject theirObject,
T2DCollisionInfo info, ref T2DResolveCollisionDelegate resolve, ref T2DCollisionMaterial physicsMaterial)
{
int damage = myObject.Components.FindComponent<AttackCollisionComponent>().Damage;
if (theirObject.TestObjectType(PlatformerData.PlayerObjectType))
{
PlayerActorComponent actor = theirObject.Components.FindComponent<PlayerActorComponent>();
// Deal damage to the enemy
if (actor != null)
actor.TakeDamage(damage, myObject, true, true);
}
myObject.MarkForDelete = true;
}
public static void ProjCollision(T2DSceneObject projectile, T2DSceneObject targetObject,
T2DCollisionInfo into, ref T2DResolveCollisionDelegate resolve, ref T2DCollisionMaterial material)
{
int damage = projectile.Components.FindComponent<ProjectileComponent>().Damage;
if (targetObject.TestObjectType(PlatformerData.ActorObjectType))
{
PlayerActorComponent actor = targetObject.Components.FindComponent<PlayerActorComponent>();
// Deal damage to the enemy
if (actor != null)
actor.TakeDamage(damage, projectile, true, true);
}
projectile.CollisionsEnabled = false;
projectile.MarkForDelete = true;
}
/// <summary>
/// T2DOnCollision delegate to handle damage between the kushling and the player
/// </summary>
/// <param name="myObject">The kushling</param>
/// <param name="theirObject">The collided object.</param>
/// <param name="info">Collision information</param>
/// <param name="resolve">How the collision will be resolved</param>
/// <param name="physicsMaterial">The type of material that would affect the physics</param>
public static void KushCollision(T2DSceneObject myObject, T2DSceneObject theirObject,
T2DCollisionInfo info, ref T2DResolveCollisionDelegate resolve, ref T2DCollisionMaterial physicsMaterial)
{
int damage = myObject.Components.FindComponent<KushlingActorComponent>().Damage;
if (theirObject.TestObjectType(PlatformerData.ActorObjectType))
{
PlayerActorComponent actor = theirObject.Components.FindComponent<PlayerActorComponent>();
// Deal damage to the enemy
if (actor != null && !actor.IsInvincible)
actor.TakeDamage(damage, myObject, true, true);
}
else if (theirObject.TestObjectType(PlatformerData.EnemyObjectType))
{
resolve = T2DPhysicsComponent.ClampCollision;
}
else
resolve = null;
}
protected override void _onEnter(T2DSceneObject ourObject, T2DSceneObject theirObject, T2DCollisionInfo info)
{
base._onEnter(ourObject, theirObject, info);
ActorComponent actor = theirObject.Components.FindComponent<ActorComponent>();
if (actor == null || ourObject == null)
return;
if (_confirmPickup(ourObject, theirObject, actor))
{
ourObject.Visible = false;
ourObject.CollisionsEnabled = false;
if (actor.Controller != null)
(actor.Controller as ActorController).ActorCollectedItem(actor, this);
if (ourObject.IsRegistered)
TorqueObjectDatabase.Instance.Unregister(ourObject);
ourObject = null;
}
}
protected static void _resolveBounce(T2DSceneObject ourObject, T2DSceneObject theirObject, ref T2DCollisionInfo info, T2DCollisionMaterial physicsMaterial, bool handleBoth)
{
if (ourObject.Physics != null)
{
// are we already bouncing away?
float dot = Vector2.Dot(ourObject.Physics.Velocity, info.Normal);
if (dot < 0.0f)
ourObject.Physics.Velocity = ourObject.Physics.Velocity - (1.0f + physicsMaterial.Restitution) * dot * info.Normal;
}
if (handleBoth && theirObject.Physics != null)
{
// are they already bouncing away?
float dot = Vector2.Dot(theirObject.Physics.Velocity, -info.Normal);
if (dot < 0.0f)
theirObject.Physics.Velocity = theirObject.Physics.Velocity + (1.0f + physicsMaterial.Restitution) * dot * info.Normal;
}
}
///<summary>
///Callback for when the tank collides with another object.
///</summary>
///<param name="ourObject">The tank.</param>
///<param name="theirObject">The other object.</param>
///<param name="info">Information about the collision point.</param>
///<param name="resolve">Not used.</param>
///<param name="physicsMaterial">
///The physics properties of the objects.
///</param>
public void OnCollision(
T2DSceneObject ourObject,
T2DSceneObject theirObject,
T2DCollisionInfo info,
ref T2DResolveCollisionDelegate resolve,
ref T2DCollisionMaterial physicsMaterial)
{
if (ourObject.MarkForDelete ||
!theirObject.TestObjectType(_collidesWith))
return;
//Set up gamepad vibration if this is a player object
//also set up maxVelocity
GamepadVibrationComponent vib =
ourObject.Components.FindComponent<GamepadVibrationComponent>();
TankMovementComponent mac =
ourObject.Components.FindComponent<TankMovementComponent>();
float maxSpeed = 0.1f; //avoid possible divide by zero below
if (null != mac)
{
maxSpeed = mac.MaxForwardSpeed;
}
//Calculate Impact Velocity.
Vector2 deltaImpactVelocity =
_CalculateImpactVelocity(ourObject, theirObject, info);
float impact = deltaImpactVelocity.Length();
float vibration =
MathHelper.Clamp((impact / (maxSpeed * 2.0f)), 0.0f, 1.0f);
//Perform sound (on all objects) and vibration (players only)
if (vibration < 0.3)
{
//High speed vibration for the small collisions
if (vib != null)
{
vib.SetHighSpeedVibration(0.2f, (vibration / 0.3f) * 0.8f);
}
if (vibration >= 0.1 &&
TorqueEngineComponent.Instance.TorqueTime >=
_nextSoftSoundPlayTime)
{
Program.SoundBank.PlayCue("softCollision");
_nextSoftSoundPlayTime =
TorqueEngineComponent.Instance.TorqueTime +
SOUND_TIME_STEP +
TorqueUtil.GetFastRandomFloat(SOUND_TIME_STEP_VARIANCE);
}
}
else
{
//Low speed vibration for the big collisions
if (vib != null)
{
vib.SetLowSpeedVibration(
0.2f,
((vibration - 0.3f) / 0.7f) * 0.9f + 0.1f);
}
if (TorqueEngineComponent.Instance.TorqueTime >=
_nextHardSoundPlayTime)
{
Program.SoundBank.PlayCue("hardCollision");
_nextHardSoundPlayTime =
TorqueEngineComponent.Instance.TorqueTime +
SOUND_TIME_STEP +
TorqueUtil.GetFastRandomFloat(SOUND_TIME_STEP_VARIANCE);
}
}
}
/// <summary>
/// Callback for when the projectile collides with another object.
/// </summary>
/// <param name="ourObject">The projectile.</param>
/// <param name="theirObject">The other object.</param>
/// <param name="info">Information about the collision point.</param>
/// <param name="resolve">Not used.</param>
/// <param name="physicsMaterial">The physics properties of the objects.</param>
public void OnCollision(
T2DSceneObject ourObject,
T2DSceneObject theirObject,
T2DCollisionInfo info,
ref T2DResolveCollisionDelegate resolve,
ref T2DCollisionMaterial physicsMaterial)
{
if (!ourObject.MarkForDelete &&
theirObject.TestObjectType(_collidesWith))
{
// If we hit a player object then activate its game pad vibration
T2DStaticSprite psprite = theirObject as T2DStaticSprite;
if (psprite != null)
{
GamepadVibrationComponent vib =
psprite.Components.FindComponent<GamepadVibrationComponent>();
if (vib != null)
{
vib.SetLowSpeedVibration(0.1f, 0.8f);
}
}
if (theirObject.TestObjectType(TorqueObjectDatabase.Instance.GetObjectType("tank")))
{
Explode(info, true);
}
else
{
Explode(info, false);
}
}
}
/// <summary>
/// Produces an explosion at the point of impact.
/// </summary>
/// <param name="info">Information about the collision point.</param>
/// <param name="sparks">
/// Should the explosion includes sparks (tank collision) or not
/// (barrier collision).
/// </param>
public void Explode(T2DCollisionInfo info, bool sparks)
{
if (sparks)
{
// Trigger the tank sparks
T2DParticleEffect sparksEffect =
(TorqueObjectDatabase.Instance.FindObject<T2DParticleEffect>(
"SparkEffect")).Clone() as T2DParticleEffect;
if (sparksEffect != null)
{
sparksEffect.Position = info.Position;
sparksEffect.Rotation = T2DVectorUtil.AngleFromVector(info.Normal);
sparksEffect.Size = new Vector2(10.0f, 10.0f);
Owner.Manager.Register(sparksEffect);
}
MindcraftersComponentsLibrary.SoundBank.PlayCue("explodeTank");
}
else
{
// Trigger smoke
T2DParticleEffect smokeEffect =
(TorqueObjectDatabase.Instance.FindObject<T2DParticleEffect>(
"SmokeEffect")).Clone() as T2DParticleEffect;
if (smokeEffect != null)
{
smokeEffect.Position = info.Position;
// For non-tank hit ie: barriers, we do a little
// calculation so that glancing blows look like they carry
// the momentum of the shell while more direct shots
// reflect back towards the direction the shell came from.
Vector2 I = SceneObject.Physics.Velocity;
I.Normalize();
Vector2 R =
I - (Vector2.Dot(2.0f * I, info.Normal) * info.Normal);
float dot = Vector2.Dot(info.Normal, -I);
smokeEffect.Rotation =
T2DVectorUtil.AngleFromVector(dot * -I + (1.0f - dot) * R);
smokeEffect.Size = new Vector2(10.0f, 10.0f);
Owner.Manager.Register(smokeEffect);
}
MindcraftersComponentsLibrary.SoundBank.PlayCue("explodeBarrier");
}
// Stop the projectile's playing sound on the parent object.
// It is stored there to allow the sound to quickly fade rather
// than just cut off when the projectile object is unregistered.
MainGunComponent mgc =
_parentObj.Components.FindComponent<MainGunComponent>();
if (mgc != null)
{
mgc.StopProjectileSound(_projectileSoundRef);
}
// Clean up the projectile.
if (DestroyOnCollision)
Owner.MarkForDelete = true;
}
/// <summary>
/// T2DOnCollision delegate to handle damage between the melee scene object and enemies
/// </summary>
/// <param name="myObject">The melee scene object mounted on the player</param>
/// <param name="theirObject">The enemy scene object</param>
/// <param name="info">Collision information</param>
/// <param name="resolve">How the collision will be resolved</param>
/// <param name="physicsMaterial">The type of material that would affect the physics</param>
public static void MeleeCollision(T2DSceneObject myObject, T2DSceneObject theirObject,
T2DCollisionInfo info, ref T2DResolveCollisionDelegate resolve, ref T2DCollisionMaterial physicsMaterial)
{
ActorComponent actor = theirObject.Components.FindComponent<ActorComponent>();
int damage = myObject.Components.FindComponent<AttackCollisionComponent>().Damage;
// Deal damage to the enemy
if(actor != null)
actor.TakeDamage(damage, myObject, true, true);
myObject.MarkForDelete = true;
}
public virtual void ResolveActorCollision(T2DSceneObject ourObject, T2DSceneObject theirObject, ref T2DCollisionInfo info, T2DCollisionMaterial physicsMaterial, bool handleBoth)
{
// this is a custom collision response mode for actors
// make sure this method is being used on an Actor
if (!ourObject.TestObjectType(PlatformerData.ActorObjectType))
return;
// make sure it's the right actor
ActorComponent actor = ourObject.Components.FindComponent<ActorComponent>();
if (actor == null)
return;
// check for a physics component
if (_actor.Physics == null)
return;
// get their object's velocity
Vector2 theirVel = Vector2.Zero;
if (theirObject.Physics != null)
theirVel = theirObject.Physics.Velocity;
// check if it's a ground surface
bool groundSurface = info.Normal.Y <= _maxGroundNormalY;
// get the actor's velocity modified velocity by the destination object's velocity
Vector2 vel = _actor.Physics.Velocity - theirVel;
//get the dot product
float dot = Vector2.Dot(vel, info.Normal);
// if we're currently on the ground, do magical stuff
if (_onGround && !groundSurface)
{
// don't let the clamp push us off the ground or into the ground!
// accomplish this by clamping the collision normal against the ground normal
float groundDot = Vector2.Dot(info.Normal, _groundSurfaceNormal);
// remove any portion of the ground surface normal from the collision normal
info.Normal -= groundDot * _groundSurfaceNormal;
// cancel move speed (this isn't a ground surface that we hit)
_moveSpeed.X = 0;
}
// return if we're moving away from the surface
if (dot >= 0.0f)
return;
// if object was not a ground surface...
if (!groundSurface)
{
// notify the controller that we hit a wall
if (Controller as ActorController != null)
(Controller as ActorController).ActorHitWall(this, info, dot);
// forfeit all inherited velocity
// (we ran into something, just get rid of it!)
_inheritedVelocity = Vector2.Zero;
}
else
{
// if we actually overlapped with a platform, correct by a small amount (1/10 of a unit)
// (the purpose of _groundYBuffer is to avoid constant collisions from scraping across the ground.
// if we are colliding with the ground regularly, _groundYBuffer is too low. this error correction
// is intended to solve potential problems when prolonged penetration occurs.)
_platformError += info.Normal * 0.1f;
}
// clamp our actial velocity anyway
_actor.Physics.Velocity -= dot * info.Normal;
// if we're not on the ground, just dump our velocity into our move speed
// and let the actor's physics clamp it
if (!_onGround)
_moveSpeed.X = _actor.Physics.Velocity.X;
}
protected static void _resolveRigid(T2DSceneObject ourObject, T2DSceneObject theirObject, ref T2DCollisionInfo info, T2DCollisionMaterial physicsMaterial, bool handleBoth)
{
Assert.Fatal(ourObject.Physics != null, "Cannot use rigid collision response without physics component");
Assert.Fatal((theirObject != null && theirObject.Physics != null) || !handleBoth, "Cannot use rigid collision response without physics component");
//------------------------------------------------------------------------------------------------------
// Fetch information.
//------------------------------------------------------------------------------------------------------
// collision normal
Vector2 normal = -info.Normal;
// Positions
Vector2 srcPosition = ourObject.Position;
Vector2 dstPosition = theirObject != null ? theirObject.Position : Vector2.Zero;
// Velocities
Vector2 srcVelocity = ourObject.Physics.Velocity;
Vector2 dstVelocity = Vector2.Zero;
// Angular Velocities.
float srcAngularVelocity = MathHelper.ToRadians(-ourObject.Physics.AngularVelocity);
float dstAngularVelocity = 0.0f;
// Friction/Restitution.
float friction = physicsMaterial.Friction;
float restitution = physicsMaterial.Restitution;
// Inverse Masses.
float srcInverseMass = ourObject.Physics.InverseMass;
float dstInverseMass = 0.0f;
// Inverse Inertial Moments.
float srcInverseInertialMoment = ourObject.Physics.InverseRotationalInertia;
float dstInverseInertialMoment = 0.0f;
if (theirObject != null && theirObject.Physics != null)
{
dstVelocity = theirObject.Physics.Velocity;
dstAngularVelocity = MathHelper.ToRadians(-theirObject.Physics.AngularVelocity);
dstInverseMass = theirObject.Physics.InverseMass;
dstInverseInertialMoment = theirObject.Physics.InverseRotationalInertia;
}
//------------------------------------------------------------------------------------------------------
// Contact info.
//------------------------------------------------------------------------------------------------------
// Contact Velocity.
Vector2 srcContactDelta = info.Position - srcPosition;
Vector2 dstContactDelta = info.Position - dstPosition;
Vector2 srcContactDeltaPerp = new Vector2(-srcContactDelta.Y, srcContactDelta.X);
Vector2 dstContactDeltaPerp = new Vector2(-dstContactDelta.Y, dstContactDelta.X);
Vector2 srcVP = srcVelocity - srcAngularVelocity * srcContactDeltaPerp;
Vector2 dstVP = dstVelocity - dstAngularVelocity * dstContactDeltaPerp;
//------------------------------------------------------------------------------------------------------
// Calculate Impact Velocity.
//------------------------------------------------------------------------------------------------------
Vector2 deltaImpactVelocity = dstVP - srcVP;
float deltaVelocityDot = Vector2.Dot(deltaImpactVelocity, normal);
// Are we seperated?
if (deltaVelocityDot > 0.0f)
// Yes, so no interaction!
return;
// Normalise velocity.
Vector2 Vn = deltaVelocityDot * normal;
Vector2 Vt = deltaImpactVelocity - Vn;
float vt = Vt.Length();
Vector2 VtDir = Vt;
if (vt > 0.0f)
VtDir *= 1.0f / vt;
//------------------------------------------------------------------------------------------------------
// Calculate Impulse ( Dynamic-Friction and Restitution )
//------------------------------------------------------------------------------------------------------
// Break Impulse Function Down a little...
float srcRN = Collision2D.PerpDot(srcContactDelta, normal);
float dstRN = Collision2D.PerpDot(dstContactDelta, normal);
float t0 = srcRN * srcRN * srcInverseInertialMoment;
float t1 = dstRN * dstRN * dstInverseInertialMoment;
float denom = srcInverseMass + dstInverseMass + t0 + t1;
// handle two non-rotating, non-moving objects colliding (two platforms?)
float jn = Math.Abs(denom) > Epsilon.Value ? deltaVelocityDot / denom : 0.0f;
// Calculate Impulse (include restitution/dynamic friction).
Vector2 impulseForce = ((-(1.0f + restitution) * jn) * normal) + ((friction * jn) * VtDir);
//------------------------------------------------------------------------------------------------------
// Changes in Momentum ( Linear and Angular ).
//------------------------------------------------------------------------------------------------------
// Calculate Linear Acceleration.
Vector2 srcLinearDelta = -impulseForce * srcInverseMass;
Vector2 dstLinearDelta = impulseForce * dstInverseMass;
// Calculate Angular Acceleration.
float srcAngularDelta = Collision2D.PerpDot(srcContactDelta, impulseForce) * srcInverseInertialMoment;
float dstAngularDelta = -Collision2D.PerpDot(dstContactDelta, impulseForce) * dstInverseInertialMoment;
//------------------------------------------------------------------------------------------------------
// Finally, apply acceleration.
//------------------------------------------------------------------------------------------------------
ourObject.Physics.Velocity += srcLinearDelta;
ourObject.Physics.AngularVelocity -= MathHelper.ToDegrees(srcAngularDelta);
if (handleBoth)
{
theirObject.Physics.Velocity += dstLinearDelta;
theirObject.Physics.AngularVelocity -= MathHelper.ToDegrees(dstAngularDelta);
}
}
/// <summary>
/// Derived classes should add collision points to 'list' using this method, which guarantees that duplicates are not added and that the list is proprly
/// reset when earlier collisions are detected.
/// </summary>
protected void _AddCollisionPoint(ref float dt, float collisionTime, Vector2 pos, Vector2 norm, Vector2 penetration, T2DSceneObject obj, int matidx, List<T2DCollisionInfo> list)
{
float MIN_COINCIDENT_TIME = 0.0005f;
if (collisionTime < 0.0f)
collisionTime = 0.0f;
if (collisionTime < dt + MIN_COINCIDENT_TIME)
{
if (collisionTime < dt - MIN_COINCIDENT_TIME)
{
// prior collision, restart list and decrease dt
list.Clear();
dt = collisionTime;
}
// add collision to list
T2DCollisionInfo info = new T2DCollisionInfo();
info.Position = pos;
info.Normal = norm;
info.Penetration = penetration;
info.SceneObject = obj;
info.MaterialIndex = matidx;
list.Add(info);
// save some debug info
_keepCollision = 1000; // 1000 frames
_lastCollisionPoint = pos;
_lastCollisionNormal = norm;
}
}
/// <summary>
/// Called from an actor possessed by this controller each time it collides with a wall or ceiling.
/// (as defined on a per-actor basis by the ActorComponent's _maxSurfaceNormalY field).
/// </summary>
/// <param name="actor">The possessed ActorComponent that hit a wall.</param>
/// <param name="info">The collision info for the collision that lead to this callback.</param>
/// <param name="dot">Dot product of the velocity and the normal.</param>
public virtual void ActorHitWall(ActorComponent actor, T2DCollisionInfo info, float dot)
{
}
public void OnCollision(T2DSceneObject ourObject, T2DSceneObject theirObject, T2DCollisionInfo info, ref T2DResolveCollisionDelegate resolve, ref T2DCollisionMaterial physicsMaterial)
{
// call our local trigger OnEnter method
_onEnter(ourObject, theirObject, info);
}
/// <summary>
/// The _onEnter callback that's called whenever an obejct collides with this trigger.
/// </summary>
/// <param name="ourObject">The owner of this trigger component.</param>
/// <param name="theirObject">The object that collided with this trigger.</param>
/// <param name="info">The collision info generated for the collision.</param>
protected virtual void _onEnter(T2DSceneObject ourObject, T2DSceneObject theirObject, T2DCollisionInfo info)
{
}
/// <summary>
/// Performs a specialized collision check against the specified object using our ground check collision polyon.
/// </summary>
/// <param name="obj">The object to check collision against.</param>
/// <returns>A list of collisions that occured with the object.</returns>
private void _testGroundPolyMove(T2DSceneObject obj)
{
// clear the Actor's ground collision list for the new check
_groundCollisionList.Clear();
// grab their collision component
T2DCollisionComponent theirCollider = obj.Collision;
// if it doesnt have a collision component we don't care about it
if (theirCollider == null)
return;
// always check based on a full tick
float elapsed = 0.03f;
// vars for moving poly - poly check
float collisionTime = 0.0f;
Vector2 collisionNormal = Vector2.Zero;
Vector2 collisionPoint = Vector2.Zero;
Vector2 collisionPenetration = Vector2.Zero;
// use a position shifted up by the height of the ground check poly
// (the poly itself is based below the actor, so this actually puts the bottom of it at the bottom of the actor's poly)
Vector2 ourPos = new Vector2(_actor.Position.X, _actor.Position.Y - (_groundCheckYThreshold * 4));
// use a velocity that will allow the poly to pass from it's current position
// to a position exactly below where the actor's feet will be
// (divide by threshold elapsed here to get the full distance in one tick)
Vector2 ourVel = new Vector2(_actor.Physics.VelocityX, Math.Abs(_actor.Physics.VelocityY) + ((_groundCheckYThreshold * 4) / elapsed));
// iterate the object's images
for (int i = 0; i < obj.Collision.Images.Count; i++)
{
// grab this collision image
T2DPolyImage theirImage = obj.Collision.Images[i] as T2DPolyImage;
// if this isn't a poly image, skip it
// (when new image types arise, add an if structure here)
if (theirImage == null)
continue;
// call the intersect function to do the math for us
bool collisionTest = Collision2D.IntersectMovingPolyPoly(
elapsed, _GroundPolyImage.CollisionPoly, theirImage.CollisionPoly,
ourPos, theirImage.SceneObject.Position,
_GroundPolyImage.SceneObject.Rotation, theirImage.SceneObject.Rotation,
ourVel, Vector2.Zero,
ref collisionPoint, ref collisionNormal, ref collisionPenetration, ref collisionTime);
// if the collision test came back positive...
if (collisionTest)
{
// skip platforms if the collision surface isn't facing 'upwards' at all
if (collisionNormal.Y >= 0)
continue;
// create a new collision info structure and add it to the list so we can return it
T2DCollisionInfo newInfo = new T2DCollisionInfo();
newInfo.Normal = collisionNormal;
newInfo.Penetration = collisionPenetration;
newInfo.Position = collisionPoint + (collisionPenetration / 2);
_groundCollisionList.Add(newInfo);
}
}
}
protected static void _resolveClamp(T2DSceneObject ourObject, T2DSceneObject theirObject, ref T2DCollisionInfo info, T2DCollisionMaterial physicsMaterial, bool handleBoth)
{
if (ourObject.Physics != null)
{
float dot = Vector2.Dot(ourObject.Physics.Velocity, info.Normal);
if (dot < 0.0f)
ourObject.Physics.Velocity = ourObject.Physics.Velocity - dot * info.Normal;
}
if (handleBoth && theirObject.Physics != null)
{
float dot = Vector2.Dot(theirObject.Physics.Velocity, -info.Normal);
if (dot < 0.0f)
theirObject.Physics.Velocity = theirObject.Physics.Velocity + dot * info.Normal;
}
}
protected static void _resolveKill(T2DSceneObject ourObject, T2DSceneObject theirObject, ref T2DCollisionInfo info, T2DCollisionMaterial physicsMaterial, bool handleBoth)
{
ourObject.MarkForDelete = true;
if (handleBoth)
theirObject.MarkForDelete = true;
}
/// <summary>
/// Resolve world limit collision. Typically called by T2DPhysicsComponent.
/// </summary>
/// <param name="info">Current collision information.</param>
public void ResolveWorldLimitCollision(T2DCollisionInfo info)
{
T2DResolveCollisionDelegate resolve = WorldLimitResolveCollision;
T2DOnCollisionDelegate onCollision = OnWorldLimit;
T2DCollisionMaterial physicsMaterial = T2DPhysicsComponent.DefaultCollisionMaterial;
if (SceneObject.Collision != null && SceneObject.Collision.CollisionMaterial != null)
physicsMaterial = SceneObject.Collision.CollisionMaterial;
// on collision, on resolve...
if (onCollision != null)
onCollision(SceneObject, null, info, ref resolve, ref physicsMaterial);
Assert.Fatal(physicsMaterial != null, "OnWorldLimitCollision nulled out physics material");
if (resolve != null)
resolve(SceneObject, null, ref info, physicsMaterial, false);
}
protected static void _resolveSticky(T2DSceneObject ourObject, T2DSceneObject theirObject, ref T2DCollisionInfo info, T2DCollisionMaterial physicsMaterial, bool handleBoth)
{
if (ourObject.Physics != null)
{
ourObject.Physics.Velocity = new Vector2(0, 0);
ourObject.Physics.AngularVelocity = 0;
}
if (handleBoth && theirObject.Physics != null)
{
theirObject.Physics.Velocity = new Vector2(0, 0);
theirObject.Physics.AngularVelocity = 0;
}
}
public virtual void OnCollision(T2DSceneObject ourObject, T2DSceneObject theirObject, T2DCollisionInfo info, ref T2DResolveCollisionDelegate resolve, ref T2DCollisionMaterial physicsMaterial)
{
// call our custom collision resolve
// (this is almost exactly the same as clamp, but takes *both* objects' velocity into account)
if (theirObject.TestObjectType(PlatformerData.PlatformObjectType))
resolve = ResolveActorCollision;
else
resolve = null;
// if we hit a ladder, enable it
if (theirObject.TestObjectType(PlatformerData.LadderObjectType))
{
// find the ladder component
LadderComponent ladder = theirObject.Components.FindComponent<LadderComponent>();
// enable it
if (ladder != null)
ladder.Enabled = true;
}
}
