public static CollisionDirection CheckCollision(Rectangle collider, Rectangle obstacle, CollisionDirection direction, bool isInside = false)
{
CollisionDirection result = CollisionDirection.None;
if (isBetween(collider.Top, obstacle.Top, obstacle.Bottom) || isBetween(collider.Bottom, obstacle.Top, obstacle.Bottom))
{
if (direction.HasFlag(CollisionDirection.Left))
{
if ((!isInside && isBetween(collider.Right, obstacle.Left, obstacle.Right)) || (isInside && isBetween(collider.Left, obstacle.Left - collider.Width, obstacle.Left)))
{
result |= CollisionDirection.Left;
}
}
if (direction.HasFlag(CollisionDirection.Right))
{
if ((!isInside && isBetween(collider.Left, obstacle.Left, obstacle.Right)) || (isInside && isBetween(collider.Right, obstacle.Right, collider.Width + obstacle.Right)))
{
result |= CollisionDirection.Right;
}
}
}
if (isBetween(collider.Left, obstacle.Left, obstacle.Right) || isBetween(collider.Right, obstacle.Left, obstacle.Right))
{
if (direction.HasFlag(CollisionDirection.Top))
{
if ((!isInside && isBetween(collider.Bottom, obstacle.Top, obstacle.Bottom)) || (isInside && isBetween(collider.Top, obstacle.Top - collider.Width, obstacle.Top)))
{
result |= CollisionDirection.Top;
}
}
if (direction.HasFlag(CollisionDirection.Bottom))
{
if ((!isInside && isBetween(collider.Top, obstacle.Top, obstacle.Bottom)) || (isInside && isBetween(collider.Bottom, obstacle.Bottom, collider.Height + collider.Bottom)))
{
result |= CollisionDirection.Bottom;
}
}
}
return(result);
}
public bool IsEntityOnEdge(Rectangle entity, Rectangle obstacle, CollisionDirection direction, bool inside)
{
if (direction.HasFlag(CollisionDirection.Left))
{
if (!inside)
{
return(Collisions.isBetween(entity.Right, obstacle.Left, obstacle.Left + Collisions.CollisionOffset));
}
return(Collisions.isBetween(entity.Left, obstacle.Left, obstacle.Left + Collisions.CollisionOffset));
}
if (direction.HasFlag(CollisionDirection.Right))
{
if (!inside)
{
return(Collisions.isBetween(entity.Left, obstacle.Right - Collisions.CollisionOffset, obstacle.Right));
}
return(Collisions.isBetween(entity.Right, obstacle.Right - Collisions.CollisionOffset, obstacle.Right));
}
return(false);
}
public static bool isInLimits(Rectangle collider, Rectangle obstacle, CollisionDirection direction)
{
if (direction.HasFlag(CollisionDirection.Left) && isBetween(collider.Right, obstacle.Left, obstacle.Left + CollisionOffset))
{
return(true);
}
if (direction.HasFlag(CollisionDirection.Right) && isBetween(collider.Left, obstacle.Right - CollisionOffset, obstacle.Right))
{
return(true);
}
if (direction.HasFlag(CollisionDirection.Top) && isBetween(collider.Bottom, obstacle.Top, obstacle.Top + CollisionOffset))
{
return(true);
}
if (direction.HasFlag(CollisionDirection.Bottom) && isBetween(collider.Top, obstacle.Bottom - CollisionOffset, obstacle.Bottom))
{
return(true);
}
return(false);
}
void PutEntityOnEdge(Entity e, Rectangle bounds, CollisionDirection direction, bool bounce = false, bool inside = true)
{
int horizontalOffset = 0;
int verticalOffset = 0;
if (bounce)
{
horizontalOffset = Collisions.CollisionOffset;
verticalOffset = Collisions.CollisionOffset;
}
if (!inside)
{
if (direction.HasFlag(CollisionDirection.Left) || direction.HasFlag(CollisionDirection.Right))
{
horizontalOffset += e.Bounds.Width;
}
if (direction.HasFlag(CollisionDirection.Top) || direction.HasFlag(CollisionDirection.Bottom))
{
verticalOffset += e.Bounds.Height;
}
}
Point p = new Point(e.Position.X, e.Position.Y);
if (!Collisions.isInLimits(e.Bounds, bounds, direction))
{
return;
}
if (direction.HasFlag(CollisionDirection.Left))
{
p.X = bounds.Left - horizontalOffset;
}
if (direction.HasFlag(CollisionDirection.Right))
{
p.X = bounds.Right + (horizontalOffset - e.Width);
}
if (direction.HasFlag(CollisionDirection.Top))
{
p.Y = bounds.Top - verticalOffset;
}
e.Position = p;
}
