public void checkIfCollision(GameObject obj, Direction dir, int speed)
{
int xmin = obj._x;
int xmax = obj._x + obj._width;
int ymin = obj._y;
int ymax = obj._y + obj._height;
//check if hitting border
switch (dir)
{
case Direction.UP:
if (ymin - speed < 0)
{
moveObject(obj, dir, 0 + ymin - speed);
obj._isColliding = true;
}
break;
case Direction.DOWN:
if (ymax + speed > Engine.TILE_HEIGHT * Engine.MAP_HEIGHT)
{
moveObject(obj, dir, (Engine.TILE_HEIGHT * Engine.MAP_HEIGHT) - ymax - speed);
obj._isColliding = true;
}
break;
case Direction.LEFT:
if (xmin - speed < 0)
{
moveObject(obj, dir, 0 + xmin - speed);
obj._isColliding = true;
}
break;
case Direction.RIGHT:
if (xmax + speed > Engine.TILE_WIDTH * Engine.MAP_LENGTH)
{
moveObject(obj, dir, (Engine.TILE_WIDTH * Engine.MAP_LENGTH) - xmax - speed);
obj._isColliding = true;
}
break;
}
//check if hitting collidable background
for (int i = 0; i < map.GetLength(0); i++)
{
for (int j = 0; j < map.GetLength(1); j++)
{
switch (dir)
{
case Direction.UP:
if (map[i, j]._collider)
{
if ((ymin - speed >= map[i, j]._y && ymin - speed <= map[i, j]._y + map[i, j]._height) &&
((xmin >= map[i, j]._x && xmin <= map[i, j]._x + map[i, j]._width) ||
(xmax >= map[i, j]._x && xmax <= map[i, j]._x + map[i, j]._width)))
{
moveObject(obj, dir, ymin - (map[i, j]._y + map[i, j]._height) - speed - 1);
obj._isColliding = true;
}
}
break;
case Direction.DOWN:
if (map[i, j]._collider)
{
if ((ymax + speed >= map[i, j]._y && ymax + speed <= map[i, j]._y + map[i, j]._height) &&
((xmin >= map[i, j]._x && xmin <= map[i, j]._x + map[i, j]._width) ||
(xmax >= map[i, j]._x && xmax <= map[i, j]._x + map[i, j]._width)))
{
moveObject(obj, dir, (map[i, j]._y) - ymax - speed - 1);
obj._isColliding = true;
}
}
break;
case Direction.LEFT:
if (map[i, j]._collider)
{
if ((xmin - speed >= map[i, j]._x && xmin - speed <= map[i, j]._x + map[i, j]._width) &&
((ymin >= map[i, j]._y && ymin <= map[i, j]._y + map[i, j]._height) ||
(ymax >= map[i, j]._y && ymax <= map[i, j]._y + map[i, j]._height)))
{
moveObject(obj, dir, xmin - (map[i, j]._x + map[i, j]._width) - speed - 1);
obj._isColliding = true;
}
}
break;
case Direction.RIGHT:
if (map[i, j]._collider)
{
if ((xmax + speed >= map[i, j]._x && xmax + speed <= map[i, j]._x + map[i, j]._width) &&
((ymin >= map[i, j]._y && ymin <= map[i, j]._y + map[i, j]._height) ||
(ymax >= map[i, j]._y && ymax <= map[i, j]._y + map[i, j]._height)))
{
moveObject(obj, dir, (map[i, j]._x) - xmax - speed - 1);
obj._isColliding = true;
}
}
break;
}
}
}
//check if colliding with collidable gameobject
for (int i = 0; i < gameObjects.Count; i++)
{
switch (dir)
{
case Direction.UP:
if (gameObjects[i]._collider)
{
if ((ymin - speed >= gameObjects[i]._y && ymin - speed <= gameObjects[i]._y + gameObjects[i]._height) &&
((xmin >= gameObjects[i]._x && xmin <= gameObjects[i]._x +gameObjects[i]._width) ||
(xmax >=gameObjects[i]._x && xmax <=gameObjects[i]._x +gameObjects[i]._width)))
{
moveObject(obj, dir, ymin - (gameObjects[i]._y +gameObjects[i]._height) - speed - 1);
obj._isColliding = true;
}
}
break;
case Direction.DOWN:
if (gameObjects[i]._collider)
{
if ((ymax + speed >=gameObjects[i]._y && ymax + speed <=gameObjects[i]._y +gameObjects[i]._height) &&
((xmin >=gameObjects[i]._x && xmin <=gameObjects[i]._x +gameObjects[i]._width) ||
(xmax >=gameObjects[i]._x && xmax <=gameObjects[i]._x +gameObjects[i]._width)))
{
moveObject(obj, dir, (gameObjects[i]._y) - ymax - speed - 1);
obj._isColliding = true;
}
}
break;
case Direction.LEFT:
if (gameObjects[i]._collider)
{
if ((xmin - speed >=gameObjects[i]._x && xmin - speed <=gameObjects[i]._x +gameObjects[i]._width) &&
((ymin >=gameObjects[i]._y && ymin <=gameObjects[i]._y +gameObjects[i]._height) ||
(ymax >=gameObjects[i]._y && ymax <=gameObjects[i]._y +gameObjects[i]._height)))
{
moveObject(obj, dir, xmin - (gameObjects[i]._x +gameObjects[i]._width) - speed - 1);
obj._isColliding = true;
}
}
break;
case Direction.RIGHT:
if (gameObjects[i]._collider)
{
if ((xmax + speed >=gameObjects[i]._x && xmax + speed <=gameObjects[i]._x +gameObjects[i]._width) &&
((ymin >=gameObjects[i]._y && ymin <=gameObjects[i]._y +gameObjects[i]._height) ||
(ymax >=gameObjects[i]._y && ymax <=gameObjects[i]._y +gameObjects[i]._height)))
{
moveObject(obj, dir, (gameObjects[i]._x) - xmax - speed - 1);
obj._isColliding = true;
}
}
break;
}
}
moveObject(obj, dir, speed);
}
public void moveObject(GameObject obj, Direction dir, int speed)
{
switch (dir)
{
case Direction.UP:
obj._y -= speed;
break;
case Direction.DOWN:
obj._y += speed;
break;
case Direction.LEFT:
obj._x -= speed;
break;
case Direction.RIGHT:
obj._x += speed;
break;
}
}