Merge Vertices With Distance 0

[animayator]

Hy,

Don't worry about my bad english, but I have a problem with mergevertices. I have convert a building as a CAD file into Maya. Now in the scene there are lots of polygons with thousands of vertices. I want to decrease the number of vertices with mergevertices with distance = 0. When I draw a box over my whole scene in component mode with the mouse to select the vertices, only a part of the vertices are selected, why? Some vertices hover. But it works. But when I right click in object mode to select all an merge vertices, it works too, but the result is not so good. Furthermore when I mergevertices twice like example two, some Polygons disappear. Why? I think the distance is zero and no polygon should disappear....
Can anybody help me??

[gdltd]

If your vertices are close together try the merge vertices with a value of 1.

Or maybe consider the merge to centre tool - depending on your model and needs that is

[animayator]

Hi,

thank you for replying quickly. If I take a value of 1, it does not work. Remember I want merge vertices with distance 0. If you align two meshes oder polygons, the vertices on the align border are twice. They lie on each other, so the distance has to be 0. I only want to decrease the number of vertices, I do not want to change the structure of the building.
I can

[fortner_mike]

I don't know why you cant select them all.

However about the merging, i think the 0 value is wrong it has to be at least 0.0001 or smt like that, just pick one that seams enough for the vertices you want to connect and is to big for the rest(so you dont merge things you don't want.

[user_deleted]

QUOTE
However about the merging, i think the 0 value is wrong it has to be at least 0.0001

Correct, your vertices may be distant by a fraction of unit (especially if you scaled the original data) and , as far as I see using the MEL command "pointPosition" on a vertex, maya returns a value with at least 7 numbers after the zero.

for the selection problem , is it always the same vertices which are selected when you try to multiselect ?
If not, make sure you don't have actived the "random" ( into Modeling --> Edit Polygons/Selection/Selection constraint ) which would give this type of behaviour.

BTW why don't you try with "Merge Multiple Edges" instead of vertices ?

Hope it helps,
Guyb.

[animayator]

Hi,

thank you for your reply. You are right. You can use merge multiple edges instead of mergesvertices. But after merging multiple edges, I can reduce the number of vertices with mergevertices all the same. why? Furthermore I have to combine the meshes, which make it difficult to texture parts of the scene. I want to write a script to merge the vertices. But if I draw a box over my whole scene in component mode only a part of vertices is selectedall vertices (which are not hover). And always the same vertices are selected. In my script I selected ALL vertices in a loop. So I solved this Problem with PolyInfo -VertexToEdge. So I can see, which Vertices aren't connected with edges and I can take them out.

Thx Animayator

[user_deleted]

Sorry but now you lost me :

QUOTE
Furthermore I have to combine the meshes

Yes, otherwise how are you planning to have vertices shared between two separate meshes ?

QUOTE
But after merging multiple edges, I can reduce the number of vertices with mergevertices all the same.

That shouldn't be the case as merging edges does merge the vertices ...

QUOTE
I can see, which Vertices aren't connected with edges and I can take them out

Vertices are always connected to edges, they don't exist individually !

Are you sure you model is correct and doesn't have faces duplicated on top of itselves ?
Try to run the "polygons cleanup" as what you described doesn't make any sense ...
Or maybe I misunderstood what you're describing.

Guyb.

[animayator]

Hy,

you are right. Your statemants "Vertices are always connected to edges, they don't exist individually" That shouldn't be the case as merging edges does merge the vertices " are correct. But in this case it is not true. I don't believe it, too. Perhaps i can send you a screenshot of my scene, where you can see that some vertices are not connected with edges....

[joojaa]

A edge cant be unsuccessfully merged if the poimnts aren't. Buut the opposite is possible!