WebGame.Projectile.CheckForCollisions C# (CSharp) Method

        protected override void CheckForCollisions(Vector3 oldPosition)
        {
            var collisionQuadrance = Target.Radius * Target.Radius + this.Radius * this.Radius;
            var currentDisplacementQuadrance = DisplacementToTarget().Quadrance();
            if (currentDisplacementQuadrance < collisionQuadrance || Utility.SphereIntersectsLineSegment(oldPosition, this.Position, Target.Position, Target.Radius)) // we may want to have an alternate check for having gone through the target || DisplacementToTarget(oldPosition).Quadrance() < currentDisplacementQuadrance) // this only works if missiles are the fastest thing
            {
                Detonate();
            }
        }