/// <summary>
/// Construct
/// </summary>
/// <param name="body"></param>
/// <param name="distanceFromBody"></param>
/// <param name="maxDistanceBetweenEachNode"></param>
/// <returns></returns>
private static List<Node> Construct(RectangleBody body, int distanceFromBody, int maxDistanceBetweenEachNode)
{
List<Node> result = new List<Node>();
Vector2 bodyPosition = body.GetPosition();
Vector2 bodySize = body.GetSize();
// Top-left corner
Vector2 northWestUnit = new Vector2(-1f, -1f);
northWestUnit.Normalize();
Vector2 topLeftNodePosition = bodyPosition - (bodySize / 2) + distanceFromBody * northWestUnit;
result.Add(new Node(topLeftNodePosition));
// Top-right corner
Vector2 northEastUnit = new Vector2(1f, -1f);
northEastUnit.Normalize();
Vector2 topRightNodePosition = bodyPosition + new Vector2(bodySize.X, -bodySize.Y) / 2 + distanceFromBody * northEastUnit;
result.Add(new Node(topRightNodePosition));
// Bottom-right corner
Vector2 southEastUnit = new Vector2(1f, 1f);
southEastUnit.Normalize();
Vector2 bottomRightNodePosition = bodyPosition + (bodySize / 2) + distanceFromBody * southEastUnit;
result.Add(new Node(bottomRightNodePosition));
// Bottom-left corner
Vector2 southWestUnit = new Vector2(-1f, 1f);
southWestUnit.Normalize();
Vector2 bottomLeftNodePosition = bodyPosition + new Vector2(-bodySize.X, bodySize.Y) / 2 + distanceFromBody * southWestUnit;
result.Add(new Node(bottomLeftNodePosition));
// Top-left corner to top-right corner
result.AddRange(FillLine(topLeftNodePosition, topRightNodePosition, maxDistanceBetweenEachNode, false));
// Top-right corner to bottom-right corner
result.AddRange(FillLine(topRightNodePosition, bottomRightNodePosition, maxDistanceBetweenEachNode, false));
// Bottom-right corner to bottom-left corner
result.AddRange(FillLine(bottomRightNodePosition, bottomLeftNodePosition, maxDistanceBetweenEachNode, false));
// Bottom-left corner to top-left corner
result.AddRange(FillLine(bottomLeftNodePosition, topLeftNodePosition, maxDistanceBetweenEachNode, false));
return result;
}
protected abstract bool DetectCollision(RectangleBody rectangleBody);
/// <summary>
/// Detect collision with a rectangle body
/// </summary>
/// <param name="rectangleBody"></param>
/// <returns></returns>
protected override bool DetectCollision(RectangleBody rectangleBody)
{
return false;
}
/// <summary>
/// Detect a collision with a rectangle body
/// </summary>
/// <param name="rectangleBody"></param>
/// <returns></returns>
protected override bool DetectCollision(RectangleBody rectangleBody)
{
return (rectangleBody.GetClosestPointOnPerimeter(this.Position) - this.Position).LengthSquared() < this.Radius * this.Radius;
}