Saving an reloading a material from an attribut

thomthom

@tig said:

You can only save certain types of classesas attributes - integer, float, string, array and boolean.
Other types like ' Sketchup::material' are not usable.

@tig said:

BUT you could simply use material.display_name [which is always unique] and save that string

he did in fact try that - material.name. so it should work. unless .name returned some bogus data.
The API docs doesn't say for .name that .display_name should be used - and it never explains what the difference is.

TIG

But the API does say for material.display_name use it instead of material.name http://code.google.com/apis/sketchup/docs/ourdoc/material.html#display_name ...

kiesewetter

ok, i assigned a material to a face with the tool in sketchup that is invoken by the icon with the color bucket. after that i loaded a script with the following code (only the face with the material was selected)

<span class="syntaxdefault">mod&nbsp;</span><span class="syntaxkeyword">=&nbsp;</span><span class="syntaxdefault">Sketchup</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">active_model<br />ents&nbsp;</span><span class="syntaxkeyword">=&nbsp;</span><span class="syntaxdefault">mod</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">entities&nbsp;<br />sel&nbsp;</span><span class="syntaxkeyword">=&nbsp;</span><span class="syntaxdefault">mod</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">selection<br />mats&nbsp;</span><span class="syntaxkeyword">=&nbsp;</span><span class="syntaxdefault">mod</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">materials<br />mat</span><span class="syntaxkeyword">=</span><span class="syntaxstring">""<br /><br /></span><span class="syntaxdefault">sel</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">each</span><span class="syntaxkeyword">{|</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">|<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="syntaxdefault">mat</span><span class="syntaxkeyword">=</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">material</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">display_name<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="syntaxkeyword">}<br /><br /><br /></span><span class="syntaxdefault">ents</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">each</span><span class="syntaxkeyword">{|</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">|<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">material&nbsp;</span><span class="syntaxkeyword">=&nbsp;</span><span class="syntaxdefault">mats</span><span class="syntaxkeyword">[</span><span class="syntaxdefault">mat</span><span class="syntaxkeyword">]<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;</span><span class="syntaxdefault"></span>

the debugger says: #<NoMethodError: undefined method `display_name' for nil:NilClass>

somehow the material doesn't seem to stored in the materials array...
that can't be true, or?

thomthom

Sounds like you've tried to store the material of an entity with the Default material. Entities with default material return nil for entity.material .

kiesewetter

i used some of the materials looking like wood. do they belong to the default materials that return nil?

another opportunity could be to save the whole model in the script, then to do something in the script an after that to load the old version that was saved before.

thomthom

Ok - I'm looking at your snippet again:

<span class="syntaxdefault"><br />mod&nbsp;</span><span class="syntaxkeyword">=&nbsp;</span><span class="syntaxdefault">Sketchup</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">active_model<br />ents&nbsp;</span><span class="syntaxkeyword">=&nbsp;</span><span class="syntaxdefault">mod</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">entities&nbsp;<br />sel&nbsp;</span><span class="syntaxkeyword">=&nbsp;</span><span class="syntaxdefault">mod</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">selection<br />mats&nbsp;</span><span class="syntaxkeyword">=&nbsp;</span><span class="syntaxdefault">mod</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">materials<br />mat</span><span class="syntaxkeyword">=</span><span class="syntaxstring">""<br /><br /></span><span class="syntaxdefault">sel</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">each</span><span class="syntaxkeyword">{|</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">|<br />&nbsp;&nbsp;</span><span class="syntaxdefault">mat</span><span class="syntaxkeyword">=</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">material</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">display_name<br /></span><span class="syntaxkeyword">}<br /><br /><br /></span><span class="syntaxdefault">ents</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">each</span><span class="syntaxkeyword">{|</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">|<br />&nbsp;&nbsp;</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">material&nbsp;</span><span class="syntaxkeyword">=&nbsp;</span><span class="syntaxdefault">mats</span><span class="syntaxkeyword">[</span><span class="syntaxdefault">mat</span><span class="syntaxkeyword">]<br />}&nbsp;<br />&nbsp;</span><span class="syntaxdefault"></span>

What are you trying to do with this?

<span class="syntaxdefault"><br />sel</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">each</span><span class="syntaxkeyword">{|</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">|<br />&nbsp;&nbsp;</span><span class="syntaxdefault">mat</span><span class="syntaxkeyword">=</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">material</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">display_name<br /></span><span class="syntaxkeyword">}<br />&nbsp;</span><span class="syntaxdefault"></span>

You're assigning the variable mat a material name - which in effect you'll only have the name of the material of the last entity in the selection you just iterated over.

And I also don't understand what you try to do next:

<span class="syntaxdefault"><br />ents</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">each</span><span class="syntaxkeyword">{|</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">|<br />&nbsp;&nbsp;</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">material&nbsp;</span><span class="syntaxkeyword">=&nbsp;</span><span class="syntaxdefault">mats</span><span class="syntaxkeyword">[</span><span class="syntaxdefault">mat</span><span class="syntaxkeyword">]<br />}&nbsp;<br />&nbsp;</span><span class="syntaxdefault"></span>

@kiesewetter said:

i used some of the materials looking like wood. do they belong to the default materials that return nil?

No. But at least one of the entities you iterate over in the selection has no material (returns nil) - so you need to inspect the data you have at hand. (Maybe you have an edge in the selection without any materials?)

TIG

You current snippets will only set 'mat' to the last value founs as you aren't doing anything with it in side the {} block ??
Your original example ought to work with set attrib' e.material.display_name... IF you use the iteration loops to set/set the attributes
e.material=mat_temp
by name [NOT by finding it in the materials list] then if it's '=nil' then the default material is used anyway ?

thomthom

I looked at your original code and made some smaller rewrites:

<span class="syntaxdefault"><br /></span><span class="syntaxcomment">#&nbsp;Store&nbsp;face's&nbsp;material&nbsp;name&nbsp;as&nbsp;attributes<br /></span><span class="syntaxdefault">model&nbsp;</span><span class="syntaxkeyword">=&nbsp;</span><span class="syntaxdefault">Sketchup</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">active_model<br />model</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">active_entities</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">each&nbsp;</span><span class="syntaxkeyword">{&nbsp;|</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">|<br />&nbsp;&nbsp;</span><span class="syntaxdefault">next&nbsp;unless&nbsp;e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">is_a</span><span class="syntaxkeyword">?(&nbsp;</span><span class="syntaxdefault">Sketchup</span><span class="syntaxkeyword">;;</span><span class="syntaxdefault">Face&nbsp;</span><span class="syntaxkeyword">)<br />&nbsp;&nbsp;if&nbsp;</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">material<br />&nbsp;&nbsp;&nbsp;&nbsp;e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">set_attribute</span><span class="syntaxkeyword">(</span><span class="syntaxstring">"time"</span><span class="syntaxkeyword">,&nbsp;</span><span class="syntaxstring">"material"</span><span class="syntaxkeyword">,&nbsp;</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">material</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">name</span><span class="syntaxkeyword">)<br />&nbsp;&nbsp;</span><span class="syntaxdefault">end<br /></span><span class="syntaxkeyword">}<br /><br /><br /></span><span class="syntaxcomment">#&nbsp;Read&nbsp;face's&nbsp;material&nbsp;name&nbsp;from&nbsp;attributes<br /></span><span class="syntaxdefault">model&nbsp;</span><span class="syntaxkeyword">=&nbsp;</span><span class="syntaxdefault">Sketchup</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">active_model<br />materials&nbsp;</span><span class="syntaxkeyword">=&nbsp;</span><span class="syntaxdefault">model</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">materials<br />model</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">active_entities</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">each&nbsp;</span><span class="syntaxkeyword">{&nbsp;|</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">|<br />&nbsp;&nbsp;</span><span class="syntaxdefault">next&nbsp;unless&nbsp;e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">is_a</span><span class="syntaxkeyword">?(&nbsp;</span><span class="syntaxdefault">Sketchup</span><span class="syntaxkeyword">;;</span><span class="syntaxdefault">Face&nbsp;</span><span class="syntaxkeyword">)<br />&nbsp;&nbsp;</span><span class="syntaxdefault">material&nbsp;</span><span class="syntaxkeyword">=&nbsp;</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">get_attribute</span><span class="syntaxkeyword">(</span><span class="syntaxstring">"time"</span><span class="syntaxkeyword">,&nbsp;</span><span class="syntaxstring">"material"</span><span class="syntaxkeyword">)<br />&nbsp;&nbsp;if&nbsp;</span><span class="syntaxdefault">material&nbsp;</span><span class="syntaxkeyword">&&&nbsp;</span><span class="syntaxdefault">materials</span><span class="syntaxkeyword">[</span><span class="syntaxdefault">material</span><span class="syntaxkeyword">]<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="syntaxdefault">e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">material&nbsp;</span><span class="syntaxkeyword">=&nbsp;</span><span class="syntaxdefault">materials</span><span class="syntaxkeyword">[</span><span class="syntaxdefault">material</span><span class="syntaxkeyword">]<br />&nbsp;&nbsp;</span><span class="syntaxdefault">end<br /></span><span class="syntaxkeyword">}<br />&nbsp;</span><span class="syntaxdefault"></span>

Note
I did in fact have to use material.name as oppose to material.display_name.

I did some testing on the default metric template in SU8 with the Susan character. When I used .display_name I could not restore the material for her hair.

SketchUp's material editor lists the material as "Color_B24" and so do .display_name.
However, model.materials['Color_B24'] returns nil.

When I used .name I got "[Color_B24]" - and when I used model.materials['[Color_B24]'] I got the correct material.

So for some reason SU decides to hide start and end brackets.

Once again the API docs fail to provide accurate data.

It appear that .display_name is intended to be used only as presentation to the user - while for referencing materials one should use .name. sigh

kiesewetter

first of all i got to thank you fpr the time youre spending.

i wrote the last script to test wheter it is possible to assign a material to an entitiy in that way. i wanted to execute it with only one face selected that has a material (the one looking like wood). the name of the material should be saved in the variable mat.

that should be realised with

sel.each{|e|
mat=e.material.display_name
}

after that i wanted to assigne every entity in the model with the same material with that part of the code

ents.each{|e|
e.material = mats[mat]
}

i still don't know how to acces a material, to save an reload it. using the diplay_name and saving it as an attribut didn't work so far.

thomthom

Did you try the snipped I just posted?

(p.s. can you please wrap the code you post in code blocks? - Makes it easier to read.)

kiesewetter

oh, ok, when i wrote my last post yours wasn't uploaded. i'll test it tommorrow because it's meanwhile hard to hold the eyes open. thanks once more for the great help.
good night.
tim

kiesewetter

hallo again!
saving to an attribute and reloading works

but now another problems appears. i only want the materials name to be stored in the attribute if it is not the name of one of the materials bau_mat, fertig_mat or inplanung.

i tried to realise it with the following code, but it seems to be stored every time, even the assigned material is one of the before mentioned:


 if e.material.name != bau_mat.name && e.material.name != fertig_mat.name && e.material.name != inplanung.name
          mat_vorher = e.material.name
          e.set_attribute "ablauf", "material", mat_vorher
 end

thomthom

<span class="syntaxdefault">invalid_materials </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> </span><span class="syntaxkeyword">[</span><span class="syntaxstring">'bau_mat'</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> </span><span class="syntaxstring">'fertig_mat'</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> </span><span class="syntaxstring">'inplanung'</span><span class="syntaxkeyword">]<br /><br /></span><span class="syntaxdefault">unless invalid_materials</span><span class="syntaxkeyword">.include?(</span><span class="syntaxdefault"> e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">material</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">name </span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">  mat_vorher </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">material</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">name<br />  e</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">set_attribute</span><span class="syntaxkeyword">(</span><span class="syntaxstring">"ablauf"</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> </span><span class="syntaxstring">"material"</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> mat_vorher</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">end<br /></span>

kiesewetter

thank you so much.

kiesewetter

me again...

i don't know why, but the attribut "ablauf", "material" always receives a new value, even if the face's material is included in the array caled invalid_material. i'll post the code, because i realy don't know how to fix it.


ents.each{|e|
            if e.typename == "Face"
                 start = e.get_attribute "ablauf", "baubeginn"
                 ende = e.get_attribute "ablauf", "bauende"
                 if (e.material) 
                   invalid_materials = ['bau_mat', 'fertig_mat', 'inplanung']
                   unless invalid_materials.include?( e.material.name )
                     mat_vorher = e.material.name
                     e.set_attribute("ablauf", "material", mat_vorher)
                   end
                 end
                 
                 
                 if @woche.to_i >= start.to_i && @woche.to_i < ende.to_i 
                   e.material = bau_mat
                 end
                 if @woche.to_i >= ende.to_i 
                   e.material =fertig_mat
                 end
                 if @woche.to_i < start.to_i 
                   e.material = inplanung
                 end
            end
                 
           }
end

#now the code that reloads the material

def mat_back 
   mod = Sketchup.active_model
   ents = mod.entities 
   mats = mod.materials
   default_mat = mats.add "standardwert"
   default_mat.color = [50,250,50] 
   ents.each{|e|
                  if e.typename == "Face"
                    if (e.get_attribute "ablauf", "material")
                     mat_temp=e.get_attribute "ablauf", "material"
                     e.material=mats[mat_temp]
                    else
                     e.material=default_mat 
                    end
                  end
                 }


end