/// <summary>
/// Detect a collision with a circle body
/// </summary>
/// <param name="circleBody"></param>
/// <returns></returns>
protected override bool DetectCollision(CircleBody circleBody)
{
// Get sum of radii
float radiusSum = this.Radius + circleBody.Radius;
// Get distance between the two bodies
Vector2 delta = this.Position - circleBody.Position;
// Return true if the distance between the center of the two bodies
// is less than or equal to the sum of the radii
bool result = (radiusSum * radiusSum) >= (delta.X * delta.X + delta.Y * delta.Y);
return result;
}
/// <summary>
/// Construct
/// </summary>
/// <param name="body"></param>
/// <returns></returns>
private static List<Node> Construct(CircleBody body, int distanceFromBody, int maxDistanceBetweenEachNode)
{
List<Node> result = new List<Node>();
int numNodes = (int)(2 * MathHelper.Pi * body.GetRadius()) / maxDistanceBetweenEachNode;
for (int i = 0; i < numNodes; i++)
{
float angle = ((float)i / (float)numNodes) * MathHelper.TwoPi;
Vector2 angleUnitVector = new Vector2((float)Math.Cos(angle), (float)Math.Sin(angle));
result.Add(new Node(body.GetPosition() + (body.GetRadius() + distanceFromBody) * angleUnitVector));
}
return result;
}
/// <summary>
/// Detect collision with a circle body
/// </summary>
/// <param name="circleBody"></param>
/// <returns></returns>
protected override bool DetectCollision(CircleBody circleBody)
{
return circleBody.DetectCollision(this);
}
protected abstract bool DetectCollision(CircleBody circleBody);
