Hello,

using an OSM file I am trying to get all intersection points in an array. "intersectionanalysis" does not work because the "Proximity tolerance" is or too high or not enough.

So I am trying to find all cross points like this :

int nc = neighbourcount(0, @ptnum);
i@nc = nc;

int ptid = @ptnum;
i@ptid = ptid;

int ptcount = @numpt;

i@ptcount = ptcount; // just to check

int intersectionList = array();

for(int i = 0; i < ptcount; i++)
{
if (nc > 2){
i@intersectionid = 1;
int intersectionid = @intersectionid;
}
append(intersectionList, ptid);
}


i@il = intersectionList;

...but of course i am not getting what i expect...i got something like this

Any good tutorial or help ?

Thanks !

Hello,

Probably because the array variable is missing brackets []:


Same thing when you want to write into an attribute using @-syntaxe :

ObeidaZakzak
Hello,

Probably because the array variable is missing brackets []:

]

Hello thanks but no... in fact when i copied the text i forgot to use the "vex" tag here and so it seems the system delete the brackets.

So here it is the full code now:

All right I took a closer look at your script.

Are you running this over Points or Detail ?

If it's over Points, then you will get a long array on every point, due to the fact you are looping over points inside a Point Wrangle. Also when working with a huge data set you might encounter performance issues due to the for loop.

If it's over Detail, then it should not work at all because @ptnum does not have sense in a Detail Wrangle, it's only usefull when running over elements like Points/Vertices/Prims.

Now if I understand the problem you are trying to solve, you want to build an array of point IDs where they have more than 2 neighbours, right ? If it's so, I can suggest a couple of methods here, and you could adapt them to your problem :

1. Build everything with a Detail Wrangle :


2. Assign point attributes with a Point Wrangle then build the list in a second time with a Detail Wrangle :

2a. Point Wrangle

2b. Detail wrangle

3. Same as 2. but instead of Detail Wrangle remove points where intersectionid == 0 and promote their ID to an array using Attribute Promote SOP (see in the hip file)