public bool GetNearestCollision(out RRayCollision col)
{
if (!collisions.Any())
{
col = new RRayCollision();
return(false);
}
var min = collisions.Min(y => y.distance);
col = collisions.Where(x => x.distance == min).First();
return(true);
}
public bool GetFarthestCollision(out RRayCollision col)
{
if (!collisions.Any())
{
col = new RRayCollision();
return(false);
}
var max = collisions.Max(y => y.distance);
col = collisions.Where(x => x.distance == max).First();
return(true);
}
/// <summary>
/// Cast a ray in a direction and return all collisions
/// </summary>
public static RRay Cast(ModelInfo info, View3D view, List <BuiltInCategory> find_cats, XYZ origin_pt, XYZ ray_dir, double max_distance = -1, List <ElementId> ids_to_ignore = null)
{
RRay ray = new RRay
{
direction = ray_dir,
start_point = origin_pt
};
bool prune_lengths = max_distance >= 0;
ReferenceIntersector ref_intersect = new ReferenceIntersector(
new ElementMulticategoryFilter(find_cats), FindReferenceTarget.Element, view)
{
FindReferencesInRevitLinks = true
};
List <ReferenceWithContext> rwcs = new List <ReferenceWithContext>();
rwcs = ref_intersect.Find(ray.start_point, ray.direction).ToList();
if (prune_lengths)
{
foreach (var rwc in rwcs.ToArray())
{
if (rwc.Proximity > max_distance)
{
rwcs.Remove(rwc);
}
}
}
List <RRayCollision> temp_collisions_storage = new List <RRayCollision>();
if (ids_to_ignore == null)
{
ids_to_ignore = new List <ElementId>();
}
foreach (var rwc in rwcs)
{
Reference r = rwc.GetReference();
if (ids_to_ignore.Any(x => x.IntegerValue == r.ElementId.IntegerValue))
{
continue;
}
Element collided_element = info.DOC.GetElement(r.ElementId);
if (collided_element == null)
{
continue;
}
RRayCollision ray_collision = new RRayCollision();
if (max_distance == -1)
{
ray_collision.distance = rwc.Proximity;
ray_collision.other_id = collided_element.Id;
ray_collision.point = r.GlobalPoint;
temp_collisions_storage.Add(ray_collision);
}
else
{
if (rwc.Proximity <= max_distance)
{
ray_collision.distance = rwc.Proximity;
ray_collision.other_id = collided_element.Id;
ray_collision.point = r.GlobalPoint;
temp_collisions_storage.Add(ray_collision);
}
}
}
ray.collisions = temp_collisions_storage.ToArray();
return(ray);
}