Beispiel #1
0
        public IEnumerable IntersectionIterator(Ray ray)
        {
            if (ray.Intersection(Aabb))
            {
                IRayTraceable checkFirst  = nodeA;
                IRayTraceable checkSecond = nodeB;
                if (ray.directionNormal[splitingPlane] < 0)
                {
                    checkFirst  = nodeB;
                    checkSecond = nodeA;
                }

                foreach (IntersectInfo info in checkFirst.IntersectionIterator(ray))
                {
                    if (info != null && info.hitType != IntersectionType.None)
                    {
                        yield return(info);
                    }
                }

                if (checkSecond != null)
                {
                    foreach (IntersectInfo info in checkSecond.IntersectionIterator(ray))
                    {
                        if (info != null && info.hitType != IntersectionType.None)
                        {
                            yield return(info);
                        }
                    }
                }
            }
        }
Beispiel #2
0
        public IntersectInfo GetClosestIntersection(Ray ray)
        {
            List <IntersectInfo> allPrimary = new List <IntersectInfo>();
            Ray checkFrontAndBacks          = new Ray(ray);

            checkFrontAndBacks.intersectionType = IntersectionType.Both;
            foreach (IntersectInfo info in primary.IntersectionIterator(checkFrontAndBacks))
            {
                allPrimary.Add(info);
            }

            if (allPrimary.Count == 0)
            {
                // We did not hit the primary object.  We are done. The subtract object does not mater.
                return(null);
            }

            allPrimary.Sort(new CompareIntersectInfoOnDistance());

            // we hit the primary object, did we hit the subtract object before (within error) hitting the primary.
            List <IntersectInfo> allSubtract = new List <IntersectInfo>();

            foreach (IntersectInfo info in subtract.IntersectionIterator(checkFrontAndBacks))
            {
                allSubtract.Add(info);
            }

            if (allSubtract.Count == 0)
            {
                // we did not hit the subtract so return the first primary
                return(allPrimary[0]);
            }

            allSubtract.Sort(new CompareIntersectInfoOnDistance());

            List <IntersectInfo> result = new List <IntersectInfo>();

            IntersectInfo.Subtract(allPrimary, allSubtract, result);

            if (result.Count > 0)
            {
                return(result[0]);
            }

            return(null);
        }
Beispiel #3
0
        public IEnumerable IntersectionIterator(Ray ray)
        {
            Ray localRay = GetLocalSpaceRay(ray);

            foreach (IntersectInfo localInfo in child.IntersectionIterator(localRay))
            {
                IntersectInfo globalIntersection = GetGlobalSpaceInfo(localInfo);
                yield return(globalIntersection);
            }
        }