public void Insert(Rectangle rectangle, ICollisionEntity collisionEntity)
{
//check if the rectangle is in the bounds of this spatial grid - if not do not even bother adding it
if (rectangle.X > _gridRectangle.X + _gridRectangle.Width || rectangle.Y > _gridRectangle.Y + _gridRectangle.Height)
{
return;
}
if (rectangle.X < _gridRectangle.X || rectangle.Y < _gridRectangle.Y)
{
return;
}
Vector2 topLeft = new Vector2(rectangle.X, rectangle.Y);
Vector2 topRight = new Vector2(rectangle.X + rectangle.Width, rectangle.Y);
Vector2 bottomLeft = new Vector2(rectangle.X, rectangle.Y + _height);
Vector2 bottomRight = new Vector2(rectangle.X + rectangle.Width, rectangle.Y + rectangle.Height);
//GridPositions
//top left
var xTopLeft = Math.Floor((topLeft.X - (_gridRectangle.X)) / _size);
var yTopLeft = Math.Floor((topLeft.Y - (_gridRectangle.Y)) / _size);
//top right
var xTopRight = Math.Floor((topRight.X - (_gridRectangle.X)) / _size);
var yTopRight = Math.Floor((topRight.Y - (_gridRectangle.Y)) / _size);
//bottom left
var xBottomLeft = Math.Floor((bottomLeft.X - (_gridRectangle.X)) / _size);
var yBottomLeft = Math.Floor((bottomLeft.Y - (_gridRectangle.Y)) / _size);
//bottom right
var xBottomRight = Math.Floor((bottomRight.X - (_gridRectangle.X)) / _size);
var yBottomRight = Math.Floor((bottomRight.Y - (_gridRectangle.Y)) / _size);
for (double x = xTopLeft; x <= xTopRight; x++)
{
for (double y = yTopLeft; y <= yTopRight; y++)
{
var key = $"{x}_{y}";
if (_grid.ContainsKey(key) && !_grid[key].Contains(collisionEntity))
{
_grid[key].Add(collisionEntity);
}
}
}
for (double x = xBottomLeft; x <= xBottomRight; x++)
{
for (double y = yBottomLeft; y <= yBottomRight; y++)
{
var key = $"{x}_{y}";
if (_grid.ContainsKey(key) && !_grid[key].Contains(collisionEntity))
{
_grid[key].Add(collisionEntity);
}
}
}
}
public void UpdateCollision(Rectangle playerRec, Rectangle tileRectangle, int xOffset, int yOffset, ICollisionEntity transform)
{
if (collisionhelper.CollisionBottom(playerRec, tileRectangle))
{
playerRec.Y = tileRectangle.Y - playerRec.Height;
transform.Velocity = new Vector2(transform.Velocity.X, 0f);
transform.HasJumped = false;
}
if (collisionhelper.CollisionRight(playerRec, tileRectangle))
{
transform.Position = new Vector2(tileRectangle.X - playerRec.Width - 2, transform.Position.Y);
}
if (collisionhelper.CollisionLeft(playerRec, tileRectangle))
{
transform.Position = new Vector2(tileRectangle.X + playerRec.Width + 2, transform.Position.Y);
}
if (collisionhelper.CollisionTop(playerRec, tileRectangle))
{
transform.Velocity = new Vector2(transform.Velocity.X, 7f);
}
// Trap hero inside window borders
if (transform.Position.X < 0)
{
transform.Position = new Vector2(0, transform.Position.Y);
}
if (transform.Position.X > xOffset - playerRec.Width)
{
transform.Position = new Vector2(xOffset - playerRec.Width, transform.Position.Y);
}
if (transform.Position.Y < 0)
{
transform.Velocity = new Vector2(transform.Velocity.X, 7.5f);
}
if (transform.Position.Y > yOffset - playerRec.Height)
{
transform.Position = new Vector2(transform.Position.X, yOffset - playerRec.Height);
}
}