public bool BoxCollidersHaveCollided(IBoxCollidable subject, IBoxCollidable target)
{
if (PositionedColliderBoundingBoxRequiresUpdate(subject)) { PositionBoxColliderBoundingBox(subject); }
if (PositionedColliderBoundingBoxRequiresUpdate(target)) { PositionBoxColliderBoundingBox(target); }
return BoundingBoxesHaveCollided(subject.PositionedCollisionBoundingBox, target.PositionedCollisionBoundingBox);
}
public bool BoxAndCircularCollidersHaveCollided(IBoxCollidable subject, ICircularCollidable target)
{
if (PositionedColliderBoundingBoxRequiresUpdate(subject)) { PositionBoxColliderBoundingBox(subject); }
if (PositionedColliderBoundingCircleRequiresUpdate(target)) { PositionCircularColliderBoundingCircle(target); }
return target.PositionedCollisionBoundingCircle.Intersects(subject.PositionedCollisionBoundingBox);
}
public virtual void AddCollidableObject(ICollidable toAdd)
{
IBoxCollidable box = toAdd as IBoxCollidable;
if ((box != null) && (!_boxColliders.Contains(box)))
{
_boxColliders.Add(box); return;
}
ICircularCollidable circle = toAdd as ICircularCollidable;
if ((circle != null) && (!_circularColliders.Contains(circle)))
{
_circularColliders.Add(circle); return;
}
IPolygonCollidable poly = toAdd as IPolygonCollidable;
if ((poly != null) && (!_polygonColliders.Contains(poly)))
{
_polygonColliders.Add(poly); return;
}
ICompoundPolygonCollidable compound = toAdd as ICompoundPolygonCollidable;
if ((compound != null) && (!_compoundPolygonColliders.Contains(compound)))
{
_compoundPolygonColliders.Add(compound); return;
}
}
public virtual void RemoveCollidableObject(ICollidable toRemove)
{
IBoxCollidable box = toRemove as IBoxCollidable;
if ((box != null) && (_boxColliders.Contains(box)))
{
_boxColliders.Remove(box); return;
}
ICircularCollidable circle = toRemove as ICircularCollidable;
if ((circle != null) && (_circularColliders.Contains(circle)))
{
_circularColliders.Remove(circle); return;
}
IPolygonCollidable poly = toRemove as IPolygonCollidable;
if ((poly != null) && (_polygonColliders.Contains(poly)))
{
_polygonColliders.Remove(poly); return;
}
ICompoundPolygonCollidable compound = toRemove as ICompoundPolygonCollidable;
if ((compound != null) && (_compoundPolygonColliders.Contains(compound)))
{
_compoundPolygonColliders.Remove(compound); return;
}
}
private bool PositionedColliderBoundingBoxRequiresUpdate(IBoxCollidable toCheck)
{
if (!toCheck.WorldPositionIsFixed)
{
return(true);
}
return((toCheck.PositionedCollisionBoundingBox == Rectangle.Empty) || (toCheck.PositionedCollisionBoundingBox == null));
}
protected void CheckIndividualBoxColliderToAllTypes(IBoxCollidable subject)
{
if (subject.Collidable)
{
CheckIndividualBoxColliderToAllBoxColliders(subject);
CheckIndividualBoxColliderToAllCircularColliders(subject);
// TODO
//CheckIndividualBoxColliderToAllPolygonColliders(_boxColliders[i]);
//CheckIndividualBoxColliderToAllCompoundPolygonColliders(_boxColliders[i]);
}
}
public bool BoxCollidersHaveCollided(IBoxCollidable subject, IBoxCollidable target)
{
if (PositionedColliderBoundingBoxRequiresUpdate(subject))
{
PositionBoxColliderBoundingBox(subject);
}
if (PositionedColliderBoundingBoxRequiresUpdate(target))
{
PositionBoxColliderBoundingBox(target);
}
return(BoundingBoxesHaveCollided(subject.PositionedCollisionBoundingBox, target.PositionedCollisionBoundingBox));
}
public bool BoxAndCircularCollidersHaveCollided(IBoxCollidable subject, ICircularCollidable target)
{
if (PositionedColliderBoundingBoxRequiresUpdate(subject))
{
PositionBoxColliderBoundingBox(subject);
}
if (PositionedColliderBoundingCircleRequiresUpdate(target))
{
PositionCircularColliderBoundingCircle(target);
}
return(target.PositionedCollisionBoundingCircle.Intersects(subject.PositionedCollisionBoundingBox));
}
private void CheckIndividualBoxColliderToAllCircularColliders(IBoxCollidable subject)
{
if (subject.Collidable)
{
int circularColliderCount = _circularColliders.Count;
for (int i = 0; i < circularColliderCount; i++)
{
if ((_circularColliders[i].Collidable) && (BoxAndCircularCollidersHaveCollided(subject, _circularColliders[i])))
{
subject.HandleCollision(_circularColliders[i]);
_circularColliders[i].HandleCollision(subject);
}
}
}
}
private void CheckIndividualBoxColliderToAllBoxColliders(IBoxCollidable subject)
{
if (subject.Collidable)
{
int boxColliderCount = _boxColliders.Count;
for (int i = 0; i < boxColliderCount; i++)
{
if ((_boxColliders[i] != subject) && (_boxColliders[i].Collidable) && (BoxCollidersHaveCollided(subject, _boxColliders[i])))
{
subject.HandleCollision(_boxColliders[i]);
_boxColliders[i].HandleCollision(subject);
}
}
}
}
private void CheckAndHandleTileImpact(int mapX, int mapY)
{
if (!_map.CellIsOccupied(mapX, mapY))
{
return;
}
IBoxCollidable collisionTile = (IBoxCollidable)_map.GetTile(mapX, mapY);
if ((collisionTile.Collidable) && (_collisionController.BoxAndCircularCollidersHaveCollided(collisionTile, this)))
{
collisionTile.HandleCollision(this);
this.HandleCollision(collisionTile);
}
}
private void PositionBoxColliderBoundingBox(IBoxCollidable sourceCollidable)
{
if (sourceCollidable.PositionedCollisionBoundingBox == null)
{
sourceCollidable.PositionedCollisionBoundingBox = Rectangle.Empty;
}
Rectangle temp = sourceCollidable.PositionedCollisionBoundingBox;
temp.X = (int)sourceCollidable.WorldPosition.X + sourceCollidable.CollisionBoundingBox.X;
temp.Y = (int)sourceCollidable.WorldPosition.Y + sourceCollidable.CollisionBoundingBox.Y;
temp.Width = sourceCollidable.CollisionBoundingBox.Width;
temp.Height = sourceCollidable.CollisionBoundingBox.Height;
sourceCollidable.PositionedCollisionBoundingBox = temp;
}
protected void CheckIndividualBoxColliderToAllTypes(IBoxCollidable subject)
{
if (subject.Collidable)
{
CheckIndividualBoxColliderToAllBoxColliders(subject);
CheckIndividualBoxColliderToAllCircularColliders(subject);
// TODO
//CheckIndividualBoxColliderToAllPolygonColliders(_boxColliders[i]);
//CheckIndividualBoxColliderToAllCompoundPolygonColliders(_boxColliders[i]);
}
}
private void CheckIndividualBoxColliderToAllCircularColliders(IBoxCollidable subject)
{
if (subject.Collidable)
{
int circularColliderCount = _circularColliders.Count;
for (int i = 0; i < circularColliderCount; i++)
{
if ((_circularColliders[i].Collidable) && (BoxAndCircularCollidersHaveCollided(subject, _circularColliders[i])))
{
subject.HandleCollision(_circularColliders[i]);
_circularColliders[i].HandleCollision(subject);
}
}
}
}
private void PositionBoxColliderBoundingBox(IBoxCollidable sourceCollidable)
{
if (sourceCollidable.PositionedCollisionBoundingBox == null)
{
sourceCollidable.PositionedCollisionBoundingBox = Rectangle.Empty;
}
Rectangle temp = sourceCollidable.PositionedCollisionBoundingBox;
temp.X = (int)sourceCollidable.WorldPosition.X + sourceCollidable.CollisionBoundingBox.X;
temp.Y = (int)sourceCollidable.WorldPosition.Y + sourceCollidable.CollisionBoundingBox.Y;
temp.Width = sourceCollidable.CollisionBoundingBox.Width;
temp.Height = sourceCollidable.CollisionBoundingBox.Height;
sourceCollidable.PositionedCollisionBoundingBox = temp;
}
private void CheckIndividualBoxColliderToAllBoxColliders(IBoxCollidable subject)
{
if (subject.Collidable)
{
int boxColliderCount = _boxColliders.Count;
for (int i = 0; i < boxColliderCount; i++)
{
if ((_boxColliders[i] != subject) && (_boxColliders[i].Collidable) && (BoxCollidersHaveCollided(subject, _boxColliders[i])))
{
subject.HandleCollision(_boxColliders[i]);
_boxColliders[i].HandleCollision(subject);
}
}
}
}
private bool PositionedColliderBoundingBoxRequiresUpdate(IBoxCollidable toCheck)
{
if (!toCheck.WorldPositionIsFixed) { return true; }
return ((toCheck.PositionedCollisionBoundingBox == Rectangle.Empty) || (toCheck.PositionedCollisionBoundingBox == null));
}
