[Plugin] Import OBJ with Materials v2.1 20131118
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@onesimo said:
hi tig! im using 3ds max design 2011. when i open/obj import my exported file the textures are not showing.. it seems my .mtl file is different from the one posted (the one with the building). thanks!
The MTL file has the lines
Ka 0.0000 0.0000 0.0000 Kd 0.0000 0.0000 0.0000 Ks 0.3500 0.3500 0.3500they should read
Ka 0.0000 0.0000 0.0000 Kd 0.3500 0.3500 0.3500 Ks 0.0000 0.0000 0.0000The Kd value sets the material's RGB color in the original MTL file it is [0,0,0] = 'black'
If you swap the Kd and Ks values and it renders 'gray' as expected...
Only the 'Kd' value is read by the SUp importer - the other twp 'K' values involve reflectivity and spectral info that SUp can't use and are superfluous...
Also if an MTL material has an image_file defined at the end of its text_block that will be used as its 'texture', overriding any RGB 'color' - but this material does not have a texture.
When you make an OBJ file check that its MTL file's 'Kd' is set to RGB otherwise it will be 'black'. -
@krisidious said:
I imported an Obj file and the uvw map came in perfectly.
but some geometry was lost... any ideas on why?The OBJ importer should import all available geometry described in the file - sometimes with very convoluted meshes it can fail, but it rarely 'misses' stuff out - in fact it's more likely to try and tie vertices together that don't join in the original with extra geometry!
If you import the same file into another app - like Blender? - is it still missing parts?
If so perhaps the export didn't pick up parts in the first place
What app made the OBJ file originally? -
@tig said:
@krisidious said:
I imported an Obj file and the uvw map came in perfectly.
but some geometry was lost... any ideas on why?The OBJ importer should import all available geometry described in the file - sometimes with very convoluted meshes it can fail, but it rarely 'misses' stuff out - in fact it's more likely to try and tie vertices together that don't join in the original with extra geometry!
If you import the same file into another app - like Blender? - is it still missing parts?
If so perhaps the export didn't pick up parts in the first place
What app made the OBJ file originally?it came from AC3D, I tried the file in 3Dmax and it's all there. it's no biggy, I don't need to do it. I was just trying it out.
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Kristoff
Can you PM me the OBJ/MTL etc [zipped].
I'd like to see if I can find out the cause anyway...
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Kristoff
I got the 'Ford' OBJ file by PM.
It imported fine for me... IF I set the units to 'meters' - it also then comes in at the correct 'size'!
If you use 'mm' it is tries to make some edges that are 1000 times too small 0 as you might have seen in other threads that guarantees that geometry fails to be made. SUp / OpenGL doesn't like anything smaller than about 0.1mm...
The importer reads the OBJ file's 'header' and if it has 'units=' in it then that is given as the default displayed in the dialog as it starts, otherwise it defaults to 'inches'.
In the case of this 'Ford' OBJ there's no header info at all, so you need to take a guess - trying larger scale units should always make geometry as the 0.1mm is never likely but of course the imported object might then be the wrong 'size'.
Meters are a common unit in non-US made OBJs...
So, panic over - try it in 'meters' and it should work fine... -
damn counting with 10's burned me again... (hits self in head meter not millimeter!)
awesome plugin. I also love the groupstoobj.rb ...
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Because the images do not appear in the trial, only show the textures in SketchUp itself. Where is a picture is blank!
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@eloiraiol said:
Because the images do not appear in the trial, only show the textures in SketchUp itself. Where is a picture is blank!
Please explain your problem another way... I don't understand
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I'm stepping into an area that I don't fully understand, so hopefully this question makes sense. I would like to import an obj with vertex colors turned on. I have a tcs file that I believe contains the vertex color data, but the obj and mtl don't appear to reference that file at all. I haven't found much searching Google for the tcs file format. Is it possible to import vertex colors into SU?
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@unknownuser said:
I'm stepping into an area that I don't fully understand, so hopefully this question makes sense. I would like to import an obj with vertex colors turned on. I have a tcs file that I believe contains the vertex color data, but the obj and mtl don't appear to reference that file at all. I haven't found much searching Google for the tcs file format. Is it possible to import vertex colors into SU?
Not with this tool - it only imports 'faces' with their colors/textures - not even raw 'edges'...
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Vertex colours, the connected face should have a surface that blends the colour from each vertex?
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Yes, that's the idea.
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thanx again TIG
now I can play with sculptris + SU -
@unknownuser said:
I'm stepping into an area that I don't fully understand, so hopefully this question makes sense. I would like to import an obj with vertex colors turned on. I have a tcs file that I believe contains the vertex color data, but the obj and mtl don't appear to reference that file at all. I haven't found much searching Google for the tcs file format. Is it possible to import vertex colors into SU?
Wyatt, where di you get the "tcs" file? I think I know what you're asking, but I have not seen any tcs file at any point. I'm scheming some things right now along these lines.
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Hey Chris. Yes, the tcs file comes from tree[d]. I'm not at my computer right now, but from what I remember it's a series of rgb values that I believe tree[d] uses to compute the color variations in the leaves. It would be great if you are figuring out a way to use that data in SU. Let me know if I can help.
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+1 to Wyatt's request! Could be very useful using Tree[d] trees!
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thank you so much!!!!!
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worked very well... thanks!!
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hellow TIG, i got some problem using this plug-ins. i don't know if the import OBJ plug-ins have a problem or the software i used. I use Frecle tree[d] 3.1 its a free tree generator software to generate tree and export it to .obj file and then import it to sketchup pro 8 using Import OBJ. when i finish importing it, the tree has no texture even i use import OBJ[with texture]as seen in the pictures. whats the problem for it TIG? Anyways, heres the link for tree[d]3.1 software http://www.frecle.net/index.php?show=treed.about . It is great help to us if you can fix this one, we can generate trees and load it to sketchup. hope you will reply this post, thanks.
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3deviator
The fault isn't with OBJimporter itself but rather with the 'tree[d]' OBJ exporter.
It makes a OBJ file describing the geometry and a MTL file describing the materials but fails to export the image files to which the MTL file refers.
If you open the MTL file with notepad you'll see some image files specified at the end of each material definition - e.g. map_Kd wood03.png
These image files are in the tree[d] 'Textures' folder - typically it'sC:\Program Files\gile[s]\plugins\tree[d]\Textures
Copy the missing image files from that folder to the folder into which you have exported your OBJ/MTL files.
Now your image OBJ file imported into a SKP 'with Textures' will have the textures applied...
Now for the rub! The exported/imported tree[d] is relatively 'useless' !!! It has single sided leaf faces and the texture is only applied to the front faces, so all of the backs show as the default back color - usually a blue/gray AND the leaf faces have visible edges and a diagonal line across the middle.
BUT there is a way to fix these issues...
Put the attached script [FixtreeD.rb] into ../Plugins folder and reopen the SKP with the tree in it, so that the script is loaded.
Now edit the group containing the tree and typeFixtreeD.newinto the Ruby Console (it runs on all entities in the current context, so DON'T use it outside of the tree group's edit).
All coplanar edges will be removed.
All other edges are hidden, and no longer cast/receive shadows.
The leaves' front materials are copied to their backs.
Hidden Geometry is switched 'off'.
Progress is reported in the Status Bar and Ruby Console
It can take some time to process a complex tree that has 1000s of partsThe attached zip file contains a tree[d] exported OBJ/MTL AND the required images listed in that MTL [but not exported by tree[d]!], it also contains the imported OBJ tree showing the problems...Examples This image shows what the 'fixed' tree looks like with the edges/back_faces etc sorted...
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