public void Intersects(ref BoundingCircle circle, out bool result)
{
float distSq;
Vectors2.DistanceSq(ref Center, ref circle.Center, out distSq);
result = distSq <= (Radius * Radius + circle.Radius * circle.Radius);
}
public void Intersects(ref BoundingRectangle rect, out bool result)
{
// Find the closest point to the circle within the rectangle
Vector2 closest;
Vector2.Clamp(ref Center, ref rect.Min, ref rect.Max, out closest);
// Calculate the distance between the circle's center and this closest point
float distanceSquared;
Vectors2.DistanceSq(ref Center, ref closest, out distanceSquared);
// If the distance is less than the circle's radius, an intersection occurs
result = (distanceSquared < Radius * Radius);
}
public static void FromVectors(Vector2[] vertices, out BoundingCircle result)
{
Contract.Requires(vertices != null);
Contract.Requires(vertices.Length > 2);
BoundingPolygon.GetCentroid(vertices, out result.Center);
result.Radius = -1;
for (var index = 0; index < vertices.Length; ++index)
{
float distSq;
Vectors2.DistanceSq(ref result.Center, ref vertices[index], out distSq);
if (result.Radius == -1 || (distSq < result.Radius))
{
result.Radius = distSq;
}
}
result.Radius = (float)Math.Sqrt(result.Radius);
}
