surface to curves

[bryan314]

Anybody know what the function is to create edges/curves from a surf? Solids are easy enough with ps_solid_ask_edges and ps_tag_to_mc_ents but I'm drawing a blank with surfs.

 

build_all_edgecrvs_on_surf, build_all_edgecrvs_on_surf_bndy, and build_edgecrv_on_surf look promising but they're not documented.

 

Thanks for any help.

 

Bryan

[Mike S @ S4A]

What version of Mastercam are you running?

[bryan314]

This is for an X2 chook.

[Roger Martin from CNC Software]

Bryan,

 

I haven't had time to test this myself, but here goes...

 

void build_all_edgecrvs_on_surf(

const ent *surf_ent,

real ch_tol,

real break_angle,

MC_BOOL *interrupted,

CArray &eptrArray);

 

Looks like you pass it a ptr to the 'Surface Entity' and a 'chordal_tolerance' and a 'break_angle'.

The the 'interrupted' will be true if the user hit ESC to abort.

The function fills in the 'eptrArray' with the Curves that were created

 

*For 'chordal' and break angle' see how these options are used in the main menu function: Create - Curve - Curve on All Edges

[bryan314]

Thanks Roger. You rule.

[CNCLaundry]

Roger,

 

tried the function build_all_edgecrvs_on_surf with chordal and break angle as i do in Mastercam directly.

The output from my chook differs in most cases. 'Mastercam direct' produces at cylinder-surfaces the correct arcs and lines.

With my chook i got at the same cylinder-surfaces splines and lines, no arcs.

In both cases i use for the chordal-tolerance 0.075 and for the break-angle 20.0.

 

Have you any ideas, what to do, to get these arcs with my chook?

 

Thanks in advance.

 

Norbert

[Roger Martin from CNC Software]

Norbert,

 

Could you send me your sample file(s) and settings data so I can investigate further?

 

sdk <at> mastercam <dot> com