/// <summary>
/// moves the entity taking collisions into account
/// </summary>
/// <returns><c>true</c>, if move actor was newed, <c>false</c> otherwise.</returns>
/// <param name="motion">Motion.</param>
/// <param name="collisionResult">Collision result.</param>
public bool move( Vector2 motion, out CollisionResult collisionResult )
{
collisionResult = new CollisionResult();
// no collider? just move and forget about it
if( entity.getComponent<Collider>() == null || _triggerHelper == null )
{
entity.transform.position += motion;
return false;
}
// 1. move all non-trigger Colliders and get closest collision
var colliders = entity.getComponents<Collider>();
for( var i = 0; i < colliders.Count; i++ )
{
var collider = colliders[i];
// skip triggers for now. we will revisit them after we move.
if( collider.isTrigger )
continue;
// fetch anything that we might collide with at our new position
var bounds = collider.bounds;
bounds.x += motion.X;
bounds.y += motion.Y;
var neighbors = Physics.boxcastBroadphaseExcludingSelf( collider, ref bounds, collider.collidesWithLayers );
foreach( var neighbor in neighbors )
{
// skip triggers for now. we will revisit them after we move.
if( neighbor.isTrigger )
continue;
if( collider.collidesWith( neighbor, motion, out collisionResult ) )
{
// hit. back off our motion
motion -= collisionResult.minimumTranslationVector;
}
}
}
ListPool<Collider>.free( colliders );
// 2. move entity to its new position if we have a collision else move the full amount. motion is updated when a collision occurs
entity.transform.position += motion;
// 3. do an overlap check of all Colliders that are triggers with all broadphase colliders, triggers or not.
// Any overlaps result in trigger events.
_triggerHelper.update();
return collisionResult.collider != null;
}
/// <summary>
/// checks to see if this Collider with motion applied (delta movement vector) collides with any collider. If it does, true will be
/// returned and result will be populated with collision data. Motion will be set to the maximum distance the Collider can travel
/// before colliding.
/// </summary>
/// <returns><c>true</c>, if with was collidesed, <c>false</c> otherwise.</returns>
/// <param name="motion">Motion.</param>
/// <param name="result">Result.</param>
public bool collidesWithAny(ref Vector2 motion, out CollisionResult result)
{
result = new CollisionResult();
// fetch anything that we might collide with at our new position
var colliderBounds = bounds;
colliderBounds.x += motion.X;
colliderBounds.y += motion.Y;
var neighbors = Physics.boxcastBroadphaseExcludingSelf(this, ref colliderBounds, collidesWithLayers);
// alter the shapes position so that it is in the place it would be after movement so we can check for overlaps
var oldPosition = shape.position;
shape.position += motion;
var didCollide = false;
foreach (var neighbor in neighbors)
{
// skip triggers
if (neighbor.isTrigger)
{
continue;
}
if (collidesWith(neighbor, out result))
{
// hit. back off our motion and our Shape.position
motion -= result.minimumTranslationVector;
shape.position -= result.minimumTranslationVector;
didCollide = true;
}
}
// return the shapes position to where it was before the check
shape.position = oldPosition;
return(didCollide);
}
/// <summary>
/// Checks for any collisions a colliser will have following a motion vector and modifies the vector to account for them.
/// </summary>
/// <param name="collider"></param>
/// <param name="motion"></param>
/// <param name="collisionResult"></param>
/// <returns>Whether or not there was a collision</returns>
private bool CheckRaycast(Collider collider, ref Vector2 motion, ref CollisionResult collisionResult)
{
var cPosition = collider.AbsolutePosition;
if (cPosition == new Vector2(float.NaN, float.NaN))
{
return(false);
}
var cDestination = collider.AbsolutePosition + motion;
var rayHit = Physics.Linecast(cPosition, cDestination);
if (rayHit.Collider != null)
{
collisionResult.MinimumTranslationVector = motion - (rayHit.Point - cPosition);
motion = (rayHit.Point - cPosition);
collisionResult.Collider = rayHit.Collider;
collisionResult.Normal = rayHit.Normal;
collisionResult.Point = rayHit.Point;
return(true);
}
return(false);
}
/// <summary>
/// checks to see if this Collider collides with any other Colliders in the Scene. The first Collider it intersects will have its collision
/// data returned in the CollisionResult.
/// </summary>
/// <returns><c>true</c>, if with was collidesed, <c>false</c> otherwise.</returns>
/// <param name="result">Result.</param>
public bool collidesWithAny(out CollisionResult result)
{
result = new CollisionResult();
// fetch anything that we might collide with at our new position
var neighbors = Physics.boxcastBroadphaseExcludingSelf(this, collidesWithLayers);
foreach (var neighbor in neighbors)
{
// skip triggers
if (neighbor.isTrigger)
{
continue;
}
if (collidesWith(neighbor, out result))
{
return(true);
}
}
return(false);
}
/// <summary>
/// checks to see if this Collider collides with collider. If it does, true will be returned and result will be populated
/// with collision data
/// </summary>
/// <returns><c>true</c>, if with was collidesed, <c>false</c> otherwise.</returns>
/// <param name="collider">Collider.</param>
/// <param name="result">Result.</param>
public bool collidesWith(Collider collider, out CollisionResult result)
{
return(shape.collidesWithShape(collider.shape, out result));
}
/// <summary>
/// moves the entity taking collisions into account
/// </summary>
/// <returns><c>true</c>, if move actor was newed, <c>false</c> otherwise.</returns>
/// <param name="motion">Motion.</param>
/// <param name="collisionResult">Collision result.</param>
public bool move(Vector2 motion, out CollisionResult collisionResult)
{
collisionResult = new CollisionResult();
// no collider? just move and forget about it
if (entity.colliders.Count == 0 || _triggerHelper == null)
{
entity.transform.position += motion;
return(false);
}
// remove ourself from the physics system until after we are done moving
entity.colliders.unregisterAllCollidersWithPhysicsSystem();
// 1. move all non-trigger Colliders and get closest collision
var colliders = entity.getColliders();
for (var i = 0; i < colliders.Count; i++)
{
var collider = colliders[i];
// skip triggers for now. we will revisit them after we move.
if (collider.isTrigger)
{
continue;
}
// fetch anything that we might collide with at our new position
var bounds = collider.bounds;
bounds.x += motion.X;
bounds.y += motion.Y;
var neighbors = Physics.boxcastBroadphase(ref bounds, collider.collidesWithLayers);
foreach (var neighbor in neighbors)
{
// skip triggers for now. we will revisit them after we move.
if (neighbor.isTrigger)
{
continue;
}
if (collider.collidesWith(neighbor, motion, out collisionResult))
{
// hit. back off our motion
motion -= collisionResult.minimumTranslationVector;
}
}
}
ListPool <Collider> .free(colliders);
// 2. move entity to its new position if we have a collision else move the full amount. motion is updated when a collision occurs
entity.transform.position += motion;
// 3. do an overlap check of all Colliders that are triggers with all broadphase colliders, triggers or not.
// Any overlaps result in trigger events.
_triggerHelper.update();
// let Physics know about our new position
entity.colliders.registerAllCollidersWithPhysicsSystem();
return(collisionResult.collider != null);
}
/// <summary>
/// checks to see if this Collider with motion applied (delta movement vector) collides with any collider. If it does, true will be
/// returned and result will be populated with collision data. Motion will be set to the maximum distance the Collider can travel
/// before colliding.
/// </summary>
/// <returns><c>true</c>, if with was collidesed, <c>false</c> otherwise.</returns>
/// <param name="motion">Motion.</param>
/// <param name="result">Result.</param>
public bool collidesWithAny( ref Vector2 motion, out CollisionResult result )
{
result = new CollisionResult();
// fetch anything that we might collide with at our new position
var colliderBounds = bounds;
colliderBounds.x += motion.X;
colliderBounds.y += motion.Y;
var neighbors = Physics.boxcastBroadphaseExcludingSelf( this, ref colliderBounds, collidesWithLayers );
// alter the shapes position so that it is in the place it would be after movement so we can check for overlaps
var oldPosition = shape.position;
shape.position += motion;
var didCollide = false;
foreach( var neighbor in neighbors )
{
// skip triggers
if( neighbor.isTrigger )
continue;
if( collidesWith( neighbor, out result ) )
{
// hit. back off our motion and our Shape.position
motion -= result.minimumTranslationVector;
shape.position -= result.minimumTranslationVector;
didCollide = true;
}
}
// return the shapes position to where it was before the check
shape.position = oldPosition;
return didCollide;
}
/// <summary>
/// checks to see if this Collider collides with any other Colliders in the Scene. The first Collider it intersects will have its collision
/// data returned in the CollisionResult.
/// </summary>
/// <returns><c>true</c>, if with was collidesed, <c>false</c> otherwise.</returns>
/// <param name="result">Result.</param>
public bool collidesWithAny( out CollisionResult result )
{
result = new CollisionResult();
// fetch anything that we might collide with at our new position
var neighbors = Physics.boxcastBroadphaseExcludingSelf( this, collidesWithLayers );
foreach( var neighbor in neighbors )
{
// skip triggers
if( neighbor.isTrigger )
continue;
if( collidesWith( neighbor, out result ) )
return true;
}
return false;
}
/// <summary>
/// checks to see if this Collider with motion applied (delta movement vector) collides with collider. If it does, true will be
/// returned and result will be populated with collision data.
/// </summary>
/// <returns><c>true</c>, if with was collidesed, <c>false</c> otherwise.</returns>
/// <param name="collider">Collider.</param>
/// <param name="motion">Motion.</param>
/// <param name="result">Result.</param>
public bool collidesWith( Collider collider, Vector2 motion, out CollisionResult result )
{
// alter the shapes position so that it is in the place it would be after movement so we can check for overlaps
var oldPosition = shape.position;
shape.position += motion;
var didCollide = shape.collidesWithShape( collider.shape, out result );
if( didCollide )
result.collider = collider;
// return the shapes position to where it was before the check
shape.position = oldPosition;
return didCollide;
}
/// <summary>
/// checks to see if this Collider collides with collider. If it does, true will be returned and result will be populated
/// with collision data
/// </summary>
/// <returns><c>true</c>, if with was collidesed, <c>false</c> otherwise.</returns>
/// <param name="collider">Collider.</param>
/// <param name="result">Result.</param>
public bool collidesWith( Collider collider, out CollisionResult result )
{
if( shape.collidesWithShape( collider.shape, out result ) )
{
result.collider = collider;
return true;
}
return false;
}
/// <summary>
/// caculates the movement modifying the motion vector to take into account any collisions that will
/// occur when moving
/// </summary>
/// <returns><c>true</c>, if movement was calculated, <c>false</c> otherwise.</returns>
/// <param name="motion">Motion.</param>
/// <param name="collisionResult">Collision result.</param>
public bool CalculateMovement(ref Vector2 motion, out CollisionResult collisionResult)
{
collisionResult = new CollisionResult();
// no collider? just move and forget about it
if (Entity.GetComponent <Collider>() == null || _triggerHelper == null)
{
return(false);
}
// 1. move all non-trigger Colliders and get closest collision
var colliders = Entity.GetComponents <Collider>();
for (var i = 0; i < colliders.Count; i++)
{
var collider = colliders[i];
// skip triggers for now. we will revisit them after we move.
if (collider.IsTrigger)
{
continue;
}
// check for any collisions along the line to the destination
bool colliding = collider.CollidesWithAny(out var _);
CheckRaycast(collider, ref motion, ref collisionResult);
// fetch anything that we might collide with at our new position
var bounds = collider.Bounds;
bounds.X += motion.X;
bounds.Y += motion.Y;
var neighbors =
Physics.BoxcastBroadphaseExcludingSelf(collider, ref bounds, collider.CollidesWithLayers);
foreach (var neighbor in neighbors)
{
// skip triggers for now. we will revisit them after we move.
if (neighbor.IsTrigger)
{
continue;
}
if (collider.CollidesWith(neighbor, motion, out CollisionResult _InternalcollisionResult))
{
// hit. back off our motion
motion -= _InternalcollisionResult.MinimumTranslationVector;
// If we hit multiple objects, only take on the first for simplicity sake.
if (_InternalcollisionResult.Collider != null)
{
collisionResult = _InternalcollisionResult;
}
}
}
// auxilery check just in case
if (!colliding && CheckRaycast(collider, ref motion, ref collisionResult))
{
motion = new Vector2();
}
}
ListPool <Collider> .Free(colliders);
return(collisionResult.Collider != null);
}
/// <summary>
/// moves the entity taking collisions into account
/// </summary>
/// <returns><c>true</c>, if move actor was newed, <c>false</c> otherwise.</returns>
/// <param name="motion">Motion.</param>
/// <param name="collisionResult">Collision result.</param>
public bool move( Vector2 motion, out CollisionResult collisionResult )
{
collisionResult = new CollisionResult();
// no collider? just move and forget about it
if( entity.colliders.Count == 0 )
{
entity.transform.position += motion;
return false;
}
// remove ourself from the physics system until after we are done moving
entity.colliders.unregisterAllCollidersWithPhysicsSystem();
// 1. move all non-trigger entity.colliders and get closest collision
for( var i = 0; i < entity.colliders.Count; i++ )
{
var collider = entity.colliders[i];
// skip triggers for now. we will revisit them after we move.
if( collider.isTrigger )
continue;
// fetch anything that we might collide with at our new position
var bounds = collider.bounds;
bounds.x += motion.X;
bounds.y += motion.Y;
var neighbors = Physics.boxcastBroadphase( ref bounds, collider.collidesWithLayers );
foreach( var neighbor in neighbors )
{
// skip triggers for now. we will revisit them after we move.
if( neighbor.isTrigger )
continue;
if( collider.collidesWith( neighbor, motion, out collisionResult ) )
{
// hit. back off our motion
motion -= collisionResult.minimumTranslationVector;
}
}
}
// 2. move entity to its new position if we have a collision else move the full amount. motion is updated when a collision occurs
entity.transform.position += motion;
// 3. do an overlap check of all entity.colliders that are triggers with all broadphase colliders, triggers or not.
// Any overlaps result in trigger events.
for( var i = 0; i < entity.colliders.Count; i++ )
{
var collider = entity.colliders[i];
// fetch anything that we might collide with us at our new position
var neighbors = Physics.boxcastBroadphase( collider.bounds, collider.collidesWithLayers );
foreach( var neighbor in neighbors )
{
// we need at least one of the colliders to be a trigger
if( !collider.isTrigger && !neighbor.isTrigger )
continue;
if( collider.overlaps( neighbor ) )
{
var pair = new Pair<Collider>( collider, neighbor );
// if we already have this pair in one of our sets (the previous or current trigger intersections) dont call the enter event
var shouldReportTriggerEvent = !_activeTriggerIntersections.Contains( pair ) && !_previousTriggerIntersections.Contains( pair );
if( shouldReportTriggerEvent )
notifyTriggerListeners( pair, true );
_activeTriggerIntersections.Add( pair );
} // overlaps
} // end foreach
}
// let Physics know about our new position
entity.colliders.registerAllCollidersWithPhysicsSystem();
checkForExitedColliders();
return collisionResult.collider != null;
}
/// <summary>
/// moves the entity taking collisions into account
/// </summary>
/// <returns><c>true</c>, if move actor was newed, <c>false</c> otherwise.</returns>
/// <param name="motion">Motion.</param>
/// <param name="collisionResult">Collision result.</param>
public bool move(Vector2 motion, out CollisionResult collisionResult)
{
collisionResult = new CollisionResult();
// no collider? just move and forget about it
if (entity.colliders.Count == 0)
{
entity.transform.position += motion;
return(false);
}
// remove ourself from the physics system until after we are done moving
entity.colliders.unregisterAllCollidersWithPhysicsSystem();
// 1. move all non-trigger entity.colliders and get closest collision
for (var i = 0; i < entity.colliders.Count; i++)
{
var collider = entity.colliders[i];
// skip triggers for now. we will revisit them after we move.
if (collider.isTrigger)
{
continue;
}
// fetch anything that we might collide with at our new position
var bounds = collider.bounds;
bounds.x += motion.X;
bounds.y += motion.Y;
var neighbors = Physics.boxcastBroadphase(ref bounds, collider.collidesWithLayers);
foreach (var neighbor in neighbors)
{
// skip triggers for now. we will revisit them after we move.
if (neighbor.isTrigger)
{
continue;
}
CollisionResult tempCollisionResult;
if (collider.collidesWith(neighbor, motion, out tempCollisionResult))
{
// hit. compare with the previous hit (if we have one) and choose the one that is closest (smallest MTV)
if (collisionResult.collider == null ||
collisionResult.minimumTranslationVector.LengthSquared() > tempCollisionResult.minimumTranslationVector.LengthSquared())
{
collisionResult = tempCollisionResult;
}
}
}
}
// 2. move entity to its new position if we have a collision else move the full amount
if (collisionResult.collider != null)
{
entity.transform.position += motion - collisionResult.minimumTranslationVector;
}
else
{
entity.transform.position += motion;
}
// 3. do an overlap check of all entity.colliders that are triggers with all broadphase colliders, triggers or not.
// Any overlaps result in trigger events.
for (var i = 0; i < entity.colliders.Count; i++)
{
var collider = entity.colliders[i];
// fetch anything that we might collide with us at our new position
var neighbors = Physics.boxcastBroadphase(collider.bounds, collider.collidesWithLayers);
foreach (var neighbor in neighbors)
{
// we need at least one of the colliders to be a trigger
if (!collider.isTrigger && !neighbor.isTrigger)
{
continue;
}
if (collider.overlaps(neighbor))
{
var pair = new Pair <Collider>(collider, neighbor);
// if we already have this pair in one of our sets (the previous or current trigger intersections) dont call the enter event
var shouldReportTriggerEvent = !_activeTriggerIntersections.Contains(pair) && !_previousTriggerIntersections.Contains(pair);
if (shouldReportTriggerEvent)
{
notifityTriggerListeners(pair, true);
}
_activeTriggerIntersections.Add(pair);
} // overlaps
} // end foreach
}
// let Physics know about our new position
entity.colliders.registerAllCollidersWithPhysicsSystem();
checkForExitedColliders();
return(collisionResult.collider != null);
}
/// <summary>
/// checks to see if this Collider collides with collider. If it does, true will be returned and result will be populated
/// with collision data
/// </summary>
/// <returns><c>true</c>, if with was collidesed, <c>false</c> otherwise.</returns>
/// <param name="collider">Collider.</param>
/// <param name="result">Result.</param>
public bool collidesWith( Collider collider, out CollisionResult result )
{
return shape.collidesWithShape( collider.shape, out result );
}
