/// <summary>
/// Checks whether the given circle intersects with this circle, calculating the
/// collision data in that case.
/// </summary>
/// <param name="other">the circle to check</param>
/// <param name="intersection">the collision data, <code>null</code> if no collision has been detected.</param>
/// <returns>true if the colliders intersect, false otherwise.</returns>
public override bool Intersects(DCircleCollider other, out Manifold intersection)
{
intersection = null;
Fix32 rDistance = this.radius + other.radius;
Fix32 sqrRadiusDistance = rDistance * rDistance;
Vector2F centerDistance = other.center - this.center;
if (centerDistance.SqrtMagnitude > sqrRadiusDistance)
{
return(false);
}
//check if one of them is a trigger
if (this.IsTrigger || other.IsTrigger)
{
intersection = new Manifold(this.Body, other.Body);
return(true);
}
Fix32 distance = centerDistance.Magnitude;
Vector2F normal;
Fix32 penetration;
if (distance > Fix32.Zero)
{
penetration = rDistance - distance;
normal = centerDistance / distance;
}
else
{
penetration = this.radius;
normal = new Vector2F((Fix32)1, (Fix32)0);
}
intersection = new Manifold(this.Body, other.Body, normal, penetration);
return(true);
}
public override bool Intersects(DCircleCollider other, out Manifold intersection)
{
throw new NotImplementedException();
}
/// <summary>
/// Checks whether the given colliders intersect, generating an Intersection instance
/// with the collision data in that case.
/// Since this function represents a "box vs circle" collision, the symmetric function is called
/// instead. See DCircleCollider for more info.
/// </summary>
/// <param name="other">the second collider</param>
/// <param name="intersection">the collision data, <code>null</code> if no collision has been detected.</param>
/// <returns></returns>
public override bool Intersects(DCircleCollider other, out Manifold intersection)
{
return(other.Intersects(this, out intersection));
}
/// <summary> /// Abstract function for intersections with circles. /// </summary> /// <param name="other">circle collider</param> /// <param name="intersection">collision data</param> /// <returns></returns> public abstract bool Intersects(DCircleCollider other, out Manifold intersection);
