//remove the collider from the bounding box dict
public static void removeCollider(Entity___Component.cCollider c)
{
man.boundingBoxes[c.key].Remove(c);
if (man.boundingBoxes[c.key].Count <= 0)
{
man.boundingBoxes.Remove(c.key);
}
}
//add the collider to the list in the dict
public static void addCollider(Entity___Component.cCollider c)
{
//generate the key
Point key = getKey(c.rect);
//if there is already a list for that key just put the collider in that list ~~
if (man.boundingBoxes.ContainsKey(key))
{
man.boundingBoxes[key].Add(c);
}
else
{
//~~ otherwise add a new list to that key and add the collider
man.boundingBoxes.Add(key, new List <Entity___Component.cCollider>());
man.boundingBoxes[key].Add(c);
}
//set the colliders key to the generated key
c.key = key;
}
public static Point WillItCollide(Entity___Component.cCollider c, int xMove, int yMove)
{
//assign the movement to a point to use to return
Point p = new Point(xMove, yMove);
//Create two rects that corrispond to the rect if this move is allowed for each axis
Rectangle futureRectX = new Rectangle(c.rect.X + xMove, c.rect.Y, c.rect.Width, c.rect.Height);
Rectangle futureRectY = new Rectangle(c.rect.X, c.rect.Y + yMove, c.rect.Width, c.rect.Height);
//check if each of those rects will collide
bool collideX = man.CheckFutureCollision(futureRectX, c);
bool collideY = man.CheckFutureCollision(futureRectY, c);
//if the rect that corrisponds to the xmove collides set the xmove to 0
if (collideX)
{
if (xMove < 0)
{
p.X = 1;
}
else
{
p.X = -1;
}
}
//do the same for the y move
if (collideY)
{
if (yMove < 0)
{
p.Y = 1;
}
else
{
p.Y = -1;
}
}
//return the adjusted movement
return(p);
}
//this checks if a rect will cause a collision and returns true if it does
public Boolean CheckFutureCollision(Rectangle rect, Entity___Component.cCollider c)
{
//get the boundingBoxes Key from the rect
Point cKey = getKey(rect);
//if the rect is outside the world immediately return true
if (c.rRef.tag != "Player" && CheckForLeaveWorld(rect))
{
return(true);
}
//for all of the surrounding bounding boxes check if any of the objects will collide
for (int i = -1; i <= 1; i++)
{
for (int j = -1; j <= 1; j++)
{
//this generates the key for the surrounding bounding boxes
Point key = new Point(cKey.X + i, cKey.Y + j);
//this checks if the corrisponding bounding box has any objects in it
if (boundingBoxes.ContainsKey(key))
{
List <Entity___Component.cCollider> box = boundingBoxes[key];
//for every object in the bounding box --
for (int k = 0; k < box.Count; k++)
{
//-- check if the bounding box collides and is not the object calling this function return true
if (box[k].collides(rect, c) && c != box[k])
{
return(true);
}
}
}
}
}
//if all else fails return false
return(false);
}
public List <Entity___Component.cCollider> CheckCollision(Entity___Component.cCollider c, int buffer)
{
//create a list to hold all of the objects that might be colliding
List <Entity___Component.cCollider> temp = new List <Entity___Component.cCollider>();
//get the key for the collidable that is being checked
Point cKey = getKey(c.rect);
Rectangle rect = new Rectangle(c.rect.X - buffer, c.rect.Y - buffer, c.rect.Width + (buffer * 2), c.rect.Height + (buffer * 2));
//for all of the surrounding bounding boxes --
for (int i = -1; i <= 1; i++)
{
for (int j = -1; j <= 1; j++)
{
//-- generate the key for that bounding box --
Point key = new Point(cKey.X + i, cKey.Y + j);
//-- if the key has any objects in it --
if (boundingBoxes.ContainsKey(key))
{
//-- for all of said objects ~~
List <Entity___Component.cCollider> box = boundingBoxes[key];
for (int k = 0; k < box.Count; k++)
{
//~~ if the object collides with the calling object and it is not the calling object ~~
if (box[k].collides(rect, c) && c != box[k])
{
//~~ add that object to the list to return
temp.Add(box[k]);
}
}
}
}
}
//return all the objects that are colliding
return(temp);
}
//remove and replace the collider to change which bounding box it is in
public static void moveCollider(Entity___Component.cCollider c)
{
removeCollider(c);
addCollider(c);
}