Mergeface doesn't work on this yet in 5 it does

Hi,
Why does Mergeface refuse to do so here in V8, yet in V5 it does.
so far everything I touch fails in v8. could have done this item an hour ago.

Mergeface doesnt work in Rhino8.3dm (3.8 MB)

and now I can’t even select the faces. in V8

V5 says select a face to merge
I select the two faces and they merge

V8 says select mesh and SubD faces edges and vertices
and I can’t even select a face now, earlier I could but they didnt merge. The lines remained there.

So I draw a new planar surface using the 4 points tool, and still cannot select that and the blue area.

Cheers

Steve

Dear Steve

in document properties:
increase the display precision.
_boundingBox will show your design is not 100% planar
dimensions = 45.000000, 37.646447, 0.000334
_projectToCplane to get rid of this precision-noise
_MergeAllCoplanarFaces … will work

my guess: different handling of tolerances in Rhino 5 and Rhino 8

hope this helps - cheers - tom

Hi,

ok increased display precision to 0.0001 same as units tolerance was/is 0.0001
then project to Cplane delete input yes.
then run mergefaces and still unable to even select the faces. they dont show a yellow edge, but do if I select them before MergeFaces command.

still why ?
(when it works in v5 )

try for MergeCoplanarFace, they twitch and nothing happens.

Steve

… i just to see the

projectToCPlane - the entire PolySurface

Hi, I did proj to cplane, as you say that will flatten it !
but still cannot get those face to even select afterwards.

Steve


Mergeface doesnt work in Rhino8.3dm (4.5 MB)

select the entire PolySurface
_ProjectToCPlane Delete=Yes
(still selected…)
_mergeAllCoPlanarFaces

Hi Tom,
that does it.
So now there is thus a problem with Rhino8 as mergefaces should do it, (as it does in V5)
as should mergeCoPlanarface.
one might not want to merge all of them.

two hours lost on doing what V5 does.

This needs flagging up, how does one do that ?

Steve

_MergeCoplanarFace

If I type mergeCoplanarface the command appears when I get to coplan and I check its the right one and I hit enter.
I select the two faces they twitch and dont merge.

if I type _mergeCoPlanarFace again it prompts to select the faces, they twitch and nothing happens.

Something is amiss.

This after they have been projected to cplane.

Steve