How to find the inner loop on a surface & more ?

[K_V]

Hello, guys

I wanna ask whether there is any functions to get the handle of the inner loop on a surface, and if I got the handle of  the loop(edges),

can I directly know or use other functions to get the the handles of two surfaces next to the edge ? 　

And further more, do you guys have any ideas on how to distinguish btwn convex & concave in 3D model ?

Thanks!

[K_V]

Anyone has any ideas ?

[FV]

look at testgeom.c in pt_examples. ProContour related functionality.

[K_V]

Hello, @FV

I don't know what  testgeom.c is, am kind of new here.

But, I actually checked ProContour related functionality in TKUSE.pdf,

And what i  got is ProSurfaceDataGet() which u can know whether this surface contains any inner loops or not,

and edge_id_arr, but what I want is the edge Identifiers of inner contours instead of all.

[K_V · Accepted solution]

I think I found the solution to this,

firstly, use func ProSurfaceDataGet() to get surface data, 

then inside of the data "->data.p_surface_data->contour_arr[n]",

and n is the index number of contour this surface contains.

Then when "->data.p_surface_data->contour_arr[n].trav == PRO_CONTOUR_TRAV_INTERNAL"

you'll get the IDs array of the edges from that internal contour by "->data.p_surface_data->contour_arr[n].edge_id_arr"