/// <summary>
/// Moves the world object and stops when it hits a solid.
/// Returns true if there was a collision and outputs the overlap.
/// </summary>
/// <param name="worldObject"></param>
/// <param name="direction"></param>
/// <param name="overlap"></param>
/// <returns></returns>
public static bool MoveAndCollide(this WorldObject worldObject, Vector2 direction, out Overlap overlap)
{
overlap = new Overlap();
if (direction == Vector2.Zero)
{
return(false);
}
bool result = false;
if (worldObject.Layout.Grid.IsCollidingAtOffset(worldObject, direction.X, 0f, out var overlapX))
{
direction.X += overlapX.Depth.X;
overlap = overlapX;
result = true;
}
if (worldObject.Layout.Grid.IsCollidingAtOffset(worldObject, 0f, direction.Y, out var overlapY))
{
direction.Y += overlapY.Depth.Y;
if (!result)
{
overlap = overlapY;
}
result = true;
}
worldObject.Move(direction.X, direction.Y);
return(result);
}
public bool IsOverlapping(WorldObject worldObject, string[] ignoreTags, out Overlap overlap)
{
overlap = new Overlap();
var overlappedObject = QueryBounds(worldObject.Bounds).FirstOrDefault(other => other != worldObject && !ignoreTags.Any(tag => other.Tags.Contains(tag)));
if (overlappedObject != null)
{
overlap.Depth = worldObject.Bounds.GetIntersectionDepth(overlappedObject.Bounds);
overlap.Other = overlappedObject;
return(true);
}
return(false);
}
public bool IsOverlapping(WorldObject worldObject, out Overlap overlap)
{
overlap = new Overlap();
var overlappedObject = QueryBounds(worldObject.Bounds).FirstOrDefault(other => other != worldObject);
if (overlappedObject != null)
{
overlap.Depth = worldObject.Bounds.GetIntersectionDepth(overlappedObject.Bounds);
overlap.Other = overlappedObject;
return(true);
}
return(false);
}
public bool IsCollidingAtOffset(WorldObject worldObject, float xOffset, float yOffset, out Overlap overlap)
{
overlap = new Overlap();
var offsetBounds = worldObject.Bounds;
offsetBounds.Offset(xOffset, yOffset);
var overlappedObject = QueryBounds(offsetBounds).FirstOrDefault(other => other != worldObject && other.IsSolid);
if (overlappedObject != null)
{
overlap.Depth = offsetBounds.GetIntersectionDepth(overlappedObject.Bounds);
overlap.Other = overlappedObject;
return(true);
}
return(false);
}
/// <summary>
/// Moves the world object while looking for overlaps.
/// Returns true if there is an overlap and outputs the overlap.
/// </summary>
/// <param name="worldObject"></param>
/// <param name="direction"></param>
/// <param name="overlap"></param>
/// <returns></returns>
public static bool MoveAndOverlap(this WorldObject worldObject, Vector2 direction, out Overlap overlap)
{
worldObject.Move(direction);
return(worldObject.Layout.Grid.IsOverlapping(worldObject, out overlap));
}
